Merge pull request #645 from SteamRE/dependabot/github_actions/actions/checkout-5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.editorconfig

@@ -1,7 +1,222 @@
-; EditorConfig: http://EditorConfig.org
-
+# top-most EditorConfig file
 root = true
 
 [*]
 indent_style = space
-indent_size = 4
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# Code files
+[*.{cs, csx, vb, vbx}]
+indent_size = 4
+
+# Github yaml files
+[*.yml]
+indent_size = 2
+
+# XML project files
+[*.{csproj, vbproj, vcxproj, vcxproj.filters, proj, projitems, shproj}]
+indent_size = 2
+
+# XML config files
+[*.{props, targets, ruleset, config, nuspec, resx, vsixmanifest, vsct}]
+indent_size = 2
+
+# Dotnet code style settings:
+[*.{cs, vb}]
+
+# IDE0055: Fix formatting
+dotnet_diagnostic.IDE0055.severity = warning
+
+# Sort using and Import directives with System.* appearing first
+dotnet_sort_system_directives_first = true
+dotnet_separate_import_directive_groups = false
+# Avoid "this." and "Me." if not necessary
+dotnet_style_qualification_for_field = false:refactoring
+dotnet_style_qualification_for_property = false:refactoring
+dotnet_style_qualification_for_method = false:refactoring
+dotnet_style_qualification_for_event = false:refactoring
+
+# Use language keywords instead of framework type names for type references
+dotnet_style_predefined_type_for_locals_parameters_members = true:suggestion
+dotnet_style_predefined_type_for_member_access = true:suggestion
+
+# Suggest more modern language features when available
+dotnet_style_object_initializer = true:suggestion
+dotnet_style_collection_initializer = true:suggestion
+dotnet_style_coalesce_expression = true:suggestion
+dotnet_style_null_propagation = true:suggestion
+dotnet_style_explicit_tuple_names = true:suggestion
+
+# Non-private static fields are PascalCase
+dotnet_naming_rule.non_private_static_fields_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.non_private_static_fields_should_be_pascal_case.symbols = non_private_static_fields
+dotnet_naming_rule.non_private_static_fields_should_be_pascal_case.style = non_private_static_field_style
+
+dotnet_naming_symbols.non_private_static_fields.applicable_kinds = field
+dotnet_naming_symbols.non_private_static_fields.applicable_accessibilities = public, protected, internal, protected_internal, private_protected
+dotnet_naming_symbols.non_private_static_fields.required_modifiers = static
+
+dotnet_naming_style.non_private_static_field_style.capitalization = pascal_case
+
+# Non-private readonly fields are PascalCase
+dotnet_naming_rule.non_private_readonly_fields_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.non_private_readonly_fields_should_be_pascal_case.symbols = non_private_readonly_fields
+dotnet_naming_rule.non_private_readonly_fields_should_be_pascal_case.style = non_private_readonly_field_style
+
+dotnet_naming_symbols.non_private_readonly_fields.applicable_kinds = field
+dotnet_naming_symbols.non_private_readonly_fields.applicable_accessibilities = public, protected, internal, protected_internal, private_protected
+dotnet_naming_symbols.non_private_readonly_fields.required_modifiers = readonly
+
+dotnet_naming_style.non_private_readonly_field_style.capitalization = pascal_case
+
+# Constants are PascalCase
+dotnet_naming_rule.constants_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.constants_should_be_pascal_case.symbols = constants
+dotnet_naming_rule.constants_should_be_pascal_case.style = constant_style
+
+dotnet_naming_symbols.constants.applicable_kinds = field, local
+dotnet_naming_symbols.constants.required_modifiers = const
+
+dotnet_naming_style.constant_style.capitalization = pascal_case
+
+# Static readonly fields are PascalCase
+dotnet_naming_rule.static_fields_should_be_camel_case.severity = suggestion
+dotnet_naming_rule.static_fields_should_be_camel_case.symbols = static_fields
+dotnet_naming_rule.static_fields_should_be_camel_case.style = static_field_style
+
+dotnet_naming_symbols.static_fields.applicable_kinds = field
+dotnet_naming_symbols.static_fields.required_modifiers = static, readonly
+
+dotnet_naming_style.static_field_style.capitalization = pascal_case
+
+# Instance fields are camelCase and start with _
+dotnet_naming_rule.instance_fields_should_be_camel_case.severity = suggestion
+dotnet_naming_rule.instance_fields_should_be_camel_case.symbols = instance_fields
+dotnet_naming_rule.instance_fields_should_be_camel_case.style = instance_field_style
+
+dotnet_naming_symbols.instance_fields.applicable_kinds = field
+
+dotnet_naming_style.instance_field_style.capitalization = camel_case
+
+# Locals and parameters are camelCase
+dotnet_naming_rule.locals_should_be_camel_case.severity = suggestion
+dotnet_naming_rule.locals_should_be_camel_case.symbols = locals_and_parameters
+dotnet_naming_rule.locals_should_be_camel_case.style = camel_case_style
+
+dotnet_naming_symbols.locals_and_parameters.applicable_kinds = parameter, local
+
+dotnet_naming_style.camel_case_style.capitalization = camel_case
+
+# Local functions are PascalCase
+dotnet_naming_rule.local_functions_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.local_functions_should_be_pascal_case.symbols = local_functions
+dotnet_naming_rule.local_functions_should_be_pascal_case.style = local_function_style
+
+dotnet_naming_symbols.local_functions.applicable_kinds = local_function
+
+dotnet_naming_style.local_function_style.capitalization = pascal_case
+
+# By default, name items with PascalCase
+dotnet_naming_rule.members_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.members_should_be_pascal_case.symbols = all_members
+dotnet_naming_rule.members_should_be_pascal_case.style = pascal_case_style
+
+dotnet_naming_symbols.all_members.applicable_kinds = *
+
+dotnet_naming_style.pascal_case_style.capitalization = pascal_case
+
+# error RS2008: Enable analyzer release tracking for the analyzer project containing rule '{0}'
+dotnet_diagnostic.RS2008.severity = none
+
+# IDE0007: Use `var` instead of explicit type
+dotnet_diagnostic.IDE0007.severity = warning
+
+# IDE0035: Remove unreachable code
+dotnet_diagnostic.IDE0035.severity = warning
+
+# IDE0036: Order modifiers
+dotnet_diagnostic.IDE0036.severity = warning
+
+# IDE0043: Format string contains invalid placeholder
+dotnet_diagnostic.IDE0043.severity = warning
+
+# IDE0044: Make field readonly
+dotnet_diagnostic.IDE0044.severity = warning
+
+# CSharp code style settings:
+[*.cs]
+
+# Require file header OR A source file contains a header that does not match the required text
+file_header_template = This file is subject to the terms and conditions defined\nin file 'LICENSE', which is part of this source code package.
+dotnet_diagnostic.IDE0073.severity = error
+
+# Newline settings
+csharp_new_line_before_open_brace = all
+csharp_new_line_before_else = true
+csharp_new_line_before_catch = true
+csharp_new_line_before_finally = true
+# csharp_new_line_before_members_in_object_initializers = true TODO seems like Rider/ReSharper has the value inverted, uncomment when its fixed
+csharp_new_line_before_members_in_anonymous_types = true
+csharp_new_line_between_query_expression_clauses = true
+
+# Indentation preferences
+csharp_indent_block_contents = true
+csharp_indent_braces = false
+csharp_indent_case_contents = true
+csharp_indent_case_contents_when_block = false
+csharp_indent_switch_labels = true
+csharp_indent_labels = flush_left
+
+# Prefer "var" everywhere
+csharp_style_var_for_built_in_types = true:suggestion
+csharp_style_var_when_type_is_apparent = true:suggestion
+csharp_style_var_elsewhere = true:suggestion
+
+# Prefer method-like constructs to have a block body
+csharp_style_expression_bodied_methods = false:none
+csharp_style_expression_bodied_constructors = false:none
+csharp_style_expression_bodied_operators = false:none
+
+# Prefer property-like constructs to have an expression-body
+csharp_style_expression_bodied_properties = true:none
+csharp_style_expression_bodied_indexers = true:none
+csharp_style_expression_bodied_accessors = true:none
+
+# Suggest more modern language features when available
+csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
+csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
+csharp_style_inlined_variable_declaration = true:suggestion
+csharp_style_throw_expression = true:suggestion
+csharp_style_conditional_delegate_call = true:suggestion
+
+# Space preferences
+csharp_space_after_cast = false
+csharp_space_after_colon_in_inheritance_clause = true
+csharp_space_after_comma = true
+csharp_space_after_dot = false
+csharp_space_after_keywords_in_control_flow_statements = true
+csharp_space_after_semicolon_in_for_statement = true
+csharp_space_around_binary_operators = before_and_after
+csharp_space_around_declaration_statements = do_not_ignore
+csharp_space_before_colon_in_inheritance_clause = true
+csharp_space_before_comma = false
+csharp_space_before_dot = false
+csharp_space_before_open_square_brackets = false
+csharp_space_before_semicolon_in_for_statement = false
+csharp_space_between_empty_square_brackets = false
+csharp_space_between_method_call_empty_parameter_list_parentheses = false
+csharp_space_between_method_call_name_and_opening_parenthesis = false
+csharp_space_between_method_call_parameter_list_parentheses = false
+csharp_space_between_method_declaration_empty_parameter_list_parentheses = false
+csharp_space_between_method_declaration_name_and_open_parenthesis = false
+csharp_space_between_method_declaration_parameter_list_parentheses = false
+csharp_space_between_parentheses = false
+csharp_space_between_square_brackets = false
+
+# Blocks are allowed
+csharp_prefer_braces = true:silent
+csharp_preserve_single_line_blocks = true
+csharp_preserve_single_line_statements = true

.gitattributes

@@ -0,0 +1,4 @@
+*.cs text eol=lf
+*.csproj text eol=lf
+*.config eol=lf
+*.json eol=lf

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -0,0 +1,60 @@
+name: Bug Report
+description: File a bug report
+labels: [bug]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+  - type: textarea
+    id: what-should-have-happened
+    attributes:
+      label: What did you expect to happen?
+      placeholder: I expected that...
+    validations:
+      required: true
+  - type: textarea
+    id: what-actually-happened
+    attributes:
+      label: Instead of that, what actually happened?
+      placeholder: ... but instead, what happened was...
+    validations:
+      required: true
+  - type: dropdown
+    id: operating-system
+    attributes:
+      label: Which operating system are you running on?
+      options:
+        - Linux
+        - macOS
+        - Windows
+        - Other
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Version
+      description: What version of DepotDownloader are using?
+    validations:
+      required: true
+  - type: input
+    id: command
+    attributes:
+      label: Command
+      description: Specify the full command you used (except for username and password)
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant log output
+      description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks. Run with `-debug` parameter to get additional output.
+      render: shell
+  - type: textarea
+    id: additional-info
+    attributes:
+      label: Additional Information
+      description: Is there anything else that you think we should know?
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: true
+contact_links:
+  - name: Discussions
+    url: https://github.com/SteamRE/DepotDownloader/discussions/new
+    about: Please ask and answer questions here.

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -0,0 +1,36 @@
+name: Feature Request
+description: Suggest an idea for this project
+labels: [enhancement]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks, we appreciate good ideas!
+  - type: textarea
+    id: problem-area
+    attributes:
+      label: What problem is this feature trying to solve?
+      placeholder: I'm really frustrated when...
+    validations:
+      required: true
+  - type: textarea
+    id: proposed-solution
+    attributes:
+      label: How would you like it to be solved?
+      placeholder: I think that it could be solved by...
+    validations:
+      required: true
+  - type: textarea
+    id: alternative-solutions
+    attributes:
+      label: Have you considered any alternative solutions
+      placeholder: I did think that that it also could be solved by ..., but...
+    validations:
+      required: true
+  - type: textarea
+    id: additional-info
+    attributes:
+      label: Additional Information
+      description: Is there anything else that you think we should know?
+    validations:
+      required: false

.github/dependabot.yml

@@ -0,0 +1,15 @@
+version: 2
+updates:
+- package-ecosystem: nuget
+  directory: "/"
+  schedule:
+    interval: weekly
+  open-pull-requests-limit: 10
+
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: weekly
+  ignore:
+    - dependency-name: "*"
+      update-types: ["version-update:semver-minor", "version-update:semver-patch"]

.github/workflows/build.yml

@@ -0,0 +1,170 @@
+name: .NET Core CI
+
+on:
+  push:
+    paths-ignore:
+      - '.github/*'
+      - '.github/*_TEMPLATE/**'
+      - '*.md'
+  pull_request:
+    paths-ignore:
+      - '.github/*'
+      - '.github/*_TEMPLATE/**'
+      - '*.md'
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: .NET on ${{ matrix.runs-on }} (${{ matrix.configuration }})
+    runs-on: ${{ matrix.runs-on }}
+    strategy:
+      fail-fast: false
+      matrix:
+        runs-on: [macos-latest, macos-14, ubuntu-latest, windows-latest]
+        configuration: [Release, Debug]
+    env:
+      DOTNET_CLI_TELEMETRY_OPTOUT: 1
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Setup .NET Core
+        uses: actions/setup-dotnet@v5
+
+      - name: Build
+        run: dotnet publish DepotDownloader/DepotDownloader.csproj -c ${{ matrix.configuration }} -o artifacts /p:ContinuousIntegrationBuild=true
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'windows-latest'
+        with:
+          name: DepotDownloader-framework
+          path: artifacts
+          if-no-files-found: error
+
+      - name: Publish Windows-x64
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'windows-latest'
+        run: dotnet publish DepotDownloader/DepotDownloader.csproj --configuration Release -p:PublishSingleFile=true -p:DebugType=embedded --self-contained --runtime win-x64 --output selfcontained-win-x64
+
+      - name: Publish Windows-arm64
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'windows-latest'
+        run: dotnet publish DepotDownloader/DepotDownloader.csproj --configuration Release -p:PublishSingleFile=true -p:DebugType=embedded --self-contained --runtime win-arm64 --output selfcontained-win-arm64
+
+      - name: Publish Linux-x64
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'ubuntu-latest'
+        run: dotnet publish DepotDownloader/DepotDownloader.csproj --configuration Release -p:PublishSingleFile=true -p:DebugType=embedded --self-contained --runtime linux-x64 --output selfcontained-linux-x64
+
+      - name: Publish Linux-arm
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'ubuntu-latest'
+        run: dotnet publish DepotDownloader/DepotDownloader.csproj --configuration Release -p:PublishSingleFile=true -p:DebugType=embedded --self-contained --runtime linux-arm --output selfcontained-linux-arm
+
+      - name: Publish Linux-arm64
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'ubuntu-latest'
+        run: dotnet publish DepotDownloader/DepotDownloader.csproj --configuration Release -p:PublishSingleFile=true -p:DebugType=embedded --self-contained --runtime linux-arm64 --output selfcontained-linux-arm64
+
+      - name: Publish macOS-x64
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'macos-latest'
+        run: dotnet publish DepotDownloader/DepotDownloader.csproj --configuration Release -p:PublishSingleFile=true -p:DebugType=embedded --self-contained --runtime osx-x64 --output selfcontained-osx-x64
+
+      - name: Publish macOS-arm64
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'macos-14'
+        run: dotnet publish DepotDownloader/DepotDownloader.csproj --configuration Release -p:PublishSingleFile=true -p:DebugType=embedded --self-contained --runtime osx-arm64 --output selfcontained-osx-arm64
+
+      - name: Upload Windows-x64
+        uses: actions/upload-artifact@v4
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'windows-latest'
+        with:
+          name: DepotDownloader-windows-x64
+          path: selfcontained-win-x64
+          if-no-files-found: error
+
+      - name: Upload Windows-arm64
+        uses: actions/upload-artifact@v4
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'windows-latest'
+        with:
+          name: DepotDownloader-windows-arm64
+          path: selfcontained-win-arm64
+          if-no-files-found: error
+
+      - name: Upload Linux-x64
+        uses: actions/upload-artifact@v4
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'ubuntu-latest'
+        with:
+          name: DepotDownloader-linux-x64
+          path: selfcontained-linux-x64
+          if-no-files-found: error
+
+      - name: Upload Linux-arm
+        uses: actions/upload-artifact@v4
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'ubuntu-latest'
+        with:
+          name: DepotDownloader-linux-arm
+          path: selfcontained-linux-arm
+          if-no-files-found: error
+
+      - name: Upload Linux-arm64
+        uses: actions/upload-artifact@v4
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'ubuntu-latest'
+        with:
+          name: DepotDownloader-linux-arm64
+          path: selfcontained-linux-arm64
+          if-no-files-found: error
+
+      - name: Upload macOS-x64
+        uses: actions/upload-artifact@v4
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'macos-latest'
+        with:
+          name: DepotDownloader-macos-x64
+          path: selfcontained-osx-x64
+          if-no-files-found: error
+
+      - name: Upload macOS-arm64
+        uses: actions/upload-artifact@v4
+        if: matrix.configuration == 'Release' && matrix.runs-on == 'macos-14'
+        with:
+          name: DepotDownloader-macos-arm64
+          path: selfcontained-osx-arm64
+          if-no-files-found: error
+
+  release:
+    if: startsWith(github.ref, 'refs/tags/')
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+    - name: Download artifacts
+      uses: actions/download-artifact@v4
+      with:
+        path: artifacts
+
+    - name: Display artifacts folder structure
+      run: ls -Rl
+      working-directory: artifacts
+
+    - name: Create release files
+      run: |
+        set -eux
+        mkdir release
+        chmod +x artifacts/DepotDownloader-linux-x64/DepotDownloader
+        chmod +x artifacts/DepotDownloader-linux-arm/DepotDownloader
+        chmod +x artifacts/DepotDownloader-linux-arm64/DepotDownloader
+        chmod +x artifacts/DepotDownloader-macos-x64/DepotDownloader
+        chmod +x artifacts/DepotDownloader-macos-arm64/DepotDownloader
+        zip -9j release/DepotDownloader-framework.zip artifacts/DepotDownloader-framework/*
+        zip -9j release/DepotDownloader-windows-x64.zip artifacts/DepotDownloader-windows-x64/*
+        zip -9j release/DepotDownloader-windows-arm64.zip artifacts/DepotDownloader-windows-arm64/*
+        zip -9j release/DepotDownloader-linux-x64.zip artifacts/DepotDownloader-linux-x64/*
+        zip -9j release/DepotDownloader-linux-arm.zip artifacts/DepotDownloader-linux-arm/*
+        zip -9j release/DepotDownloader-linux-arm64.zip artifacts/DepotDownloader-linux-arm64/*
+        zip -9j release/DepotDownloader-macos-x64.zip artifacts/DepotDownloader-macos-x64/*
+        zip -9j release/DepotDownloader-macos-arm64.zip artifacts/DepotDownloader-macos-arm64/*
+
+    - name: Display structure of archived files
+      run: ls -Rl
+      working-directory: release
+
+    - name: Release
+      uses: softprops/action-gh-release@v2
+      with:
+        draft: true
+        files: release/*
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/sk2-ci.yml

@@ -0,0 +1,39 @@
+name: SteamKit2 Continuous Integration
+
+on:
+  schedule:
+    - cron: '0 1 * * SUN'
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: .NET on ${{ matrix.runs-on }} (${{ matrix.configuration }})
+    runs-on: ${{ matrix.runs-on }}
+    strategy:
+      fail-fast: false
+      matrix:
+        runs-on: [ macos-latest, macos-14, ubuntu-latest, windows-latest ]
+        configuration: [ Release, Debug ]
+    env:
+      DOTNET_CLI_TELEMETRY_OPTOUT: 1
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Setup .NET Core
+        uses: actions/setup-dotnet@v5
+
+      - name: Configure NuGet
+        run: |
+          dotnet nuget add source --username USERNAME --password ${{ secrets.GITHUB_TOKEN }} --store-password-in-clear-text --name github "https://nuget.pkg.github.com/SteamRE/index.json"
+          dotnet add DepotDownloader/DepotDownloader.csproj package SteamKit2 --prerelease
+
+      - name: Build
+        run: dotnet publish DepotDownloader/DepotDownloader.csproj -c ${{ matrix.configuration }} -o artifacts /p:ContinuousIntegrationBuild=true
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        if: matrix.configuration == 'Release'
+        with:
+          name: DepotDownloader-${{ matrix.runs-on }}
+          path: artifacts
+          if-no-files-found: error

.github/workflows/winget.yml

@@ -0,0 +1,33 @@
+name: WinGet submission on release
+
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+
+jobs:
+  winget:
+    name: Publish winget package
+    runs-on: windows-latest
+    steps:
+      - name: Submit package to Windows Package Manager Community Repository
+        run: |
+          $wingetPackage = "SteamRE.DepotDownloader"
+
+          $headers = @{
+            Authorization = "Bearer ${{ secrets.GITHUB_TOKEN }}"
+          }
+
+          $github = Invoke-RestMethod -uri "https://api.github.com/repos/SteamRE/DepotDownloader/releases" -Headers $headers
+
+          $targetRelease = $github | Where-Object -Property name -match '^DepotDownloader' | Select -First 1
+          $assets = $targetRelease | Select -ExpandProperty assets -First 1
+          $zipX64Url = $assets | Where-Object -Property name -match 'DepotDownloader-windows-x64.zip' | Select -ExpandProperty browser_download_url
+          $zipArm64Url = $assets | Where-Object -Property name -match 'DepotDownloader-windows-arm64.zip' | Select -ExpandProperty browser_download_url
+          $ver = $targetRelease.tag_name -ireplace '^(DepotDownloader[ _])?v?'
+
+          # getting latest wingetcreate file
+          iwr https://aka.ms/wingetcreate/latest -OutFile wingetcreate.exe
+
+          # how to create a token: https://github.com/microsoft/winget-create?tab=readme-ov-file#github-personal-access-token-classic-permissions
+          .\wingetcreate.exe update $wingetPackage --submit --version $ver --urls "$zipX64Url" "$zipArm64Url" --token "${{ secrets.PT_WINGET }}"

.gitignore

@@ -60,7 +60,7 @@ _ReSharper*
 *.ncrunch*
 .*crunch*.local.xml
 
-# Installshield output folder 
+# Installshield output folder
 [Ee]xpress
 
 # DocProject is a documentation generator add-in
@@ -117,4 +117,5 @@ protobuf/
 cryptopp/
 
 # misc
-Thumbs.db
+Thumbs.db
+launchSettings.json

.travis.yml

@@ -1,24 +0,0 @@
-sudo: required
-dist: bionic
-
-language: csharp
-mono: none
-dotnet: 2.0.0
-solution: DepotDownloader.sln
-
-install:
-    - dotnet restore DepotDownloader.sln
-
-script:
-    - dotnet build DepotDownloader.sln
-
-notifications:
-    irc:
-        channels:
-            - "irc.gamesurge.net#opensteamworks"
-        on_success: never
-        on_failure: always
-
-cache:
-    directories:
-        - "~/.local/share/NuGet/Cache"

DepotDownloader/AccountSettingsStore.cs

@@ -1,34 +1,39 @@
-using System;
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
-using ProtoBuf;
 using System.IO;
 using System.IO.Compression;
 using System.IO.IsolatedStorage;
-using System.Linq;
-using SteamKit2;
-using SteamKit2.Discovery;
+using ProtoBuf;
 
 namespace DepotDownloader
 {
     [ProtoContract]
     class AccountSettingsStore
     {
-        [ProtoMember(1, IsRequired=false)]
-        public Dictionary<string, byte[]> SentryData { get; private set; }
+        // Member 1 was a Dictionary<string, byte[]> for SentryData.
 
         [ProtoMember(2, IsRequired = false)]
-        public System.Collections.Concurrent.ConcurrentDictionary<string, int> ContentServerPenalty { get; private set; }
+        public ConcurrentDictionary<string, int> ContentServerPenalty { get; private set; }
+
+        // Member 3 was a Dictionary<string, string> for LoginKeys.
 
-        [ProtoMember(3, IsRequired = false)]
-        public Dictionary<string, string> LoginKeys { get; private set; }
+        [ProtoMember(4, IsRequired = false)]
+        public Dictionary<string, string> LoginTokens { get; private set; }
 
-        string FileName = null;
+        [ProtoMember(5, IsRequired = false)]
+        public Dictionary<string, string> GuardData { get; private set; }
+
+        string FileName;
 
         AccountSettingsStore()
         {
-            SentryData = new Dictionary<string, byte[]>();
-            ContentServerPenalty = new System.Collections.Concurrent.ConcurrentDictionary<string, int>();
-            LoginKeys = new Dictionary<string, string>();
+            ContentServerPenalty = new ConcurrentDictionary<string, int>();
+            LoginTokens = new(StringComparer.OrdinalIgnoreCase);
+            GuardData = new(StringComparer.OrdinalIgnoreCase);
         }
 
         static bool Loaded
@@ -36,7 +41,7 @@ namespace DepotDownloader
             get { return Instance != null; }
         }
 
-        public static AccountSettingsStore Instance = null;
+        public static AccountSettingsStore Instance;
         static readonly IsolatedStorageFile IsolatedStorage = IsolatedStorageFile.GetUserStoreForAssembly();
 
         public static void LoadFromFile(string filename)
@@ -48,11 +53,9 @@ namespace DepotDownloader
             {
                 try
                 {
-                    using (var fs = IsolatedStorage.OpenFile(filename, FileMode.Open, FileAccess.Read))
-                    using (DeflateStream ds = new DeflateStream(fs, CompressionMode.Decompress))
-                    {
-                        Instance = ProtoBuf.Serializer.Deserialize<AccountSettingsStore>(ds);
-                    }
+                    using var fs = IsolatedStorage.OpenFile(filename, FileMode.Open, FileAccess.Read);
+                    using var ds = new DeflateStream(fs, CompressionMode.Decompress);
+                    Instance = Serializer.Deserialize<AccountSettingsStore>(ds);
                 }
                 catch (IOException ex)
                 {
@@ -75,11 +78,9 @@ namespace DepotDownloader
 
             try
             {
-                using (var fs = IsolatedStorage.OpenFile(Instance.FileName, FileMode.Create, FileAccess.Write))
-                using (DeflateStream ds = new DeflateStream(fs, CompressionMode.Compress))
-                {
-                    ProtoBuf.Serializer.Serialize<AccountSettingsStore>(ds, Instance);
-                }
+                using var fs = IsolatedStorage.OpenFile(Instance.FileName, FileMode.Create, FileAccess.Write);
+                using var ds = new DeflateStream(fs, CompressionMode.Compress);
+                Serializer.Serialize(ds, Instance);
             }
             catch (IOException ex)
             {

DepotDownloader/Ansi.cs

@@ -0,0 +1,59 @@
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System;
+using Spectre.Console;
+
+namespace DepotDownloader;
+
+static class Ansi
+{
+    // https://conemu.github.io/en/AnsiEscapeCodes.html#ConEmu_specific_OSC
+    // https://learn.microsoft.com/en-us/windows/terminal/tutorials/progress-bar-sequences
+    public enum ProgressState
+    {
+        Hidden = 0,
+        Default = 1,
+        Error = 2,
+        Indeterminate = 3,
+        Warning = 4,
+    }
+
+    const char ESC = (char)0x1B;
+    const char BEL = (char)0x07;
+
+    private static bool useProgress;
+
+    public static void Init()
+    {
+        if (Console.IsInputRedirected || Console.IsOutputRedirected)
+        {
+            return;
+        }
+
+        if (OperatingSystem.IsLinux())
+        {
+            return;
+        }
+
+        var (supportsAnsi, legacyConsole) = AnsiDetector.Detect(stdError: false, upgrade: true);
+
+        useProgress = supportsAnsi && !legacyConsole;
+    }
+
+    public static void Progress(ulong downloaded, ulong total)
+    {
+        var progress = (byte)MathF.Round(downloaded / (float)total * 100.0f);
+        Progress(ProgressState.Default, progress);
+    }
+
+    public static void Progress(ProgressState state, byte progress = 0)
+    {
+        if (!useProgress)
+        {
+            return;
+        }
+
+        Console.Write($"{ESC}]9;4;{(byte)state};{progress}{BEL}");
+    }
+}

DepotDownloader/AnsiDetector.cs

@@ -0,0 +1,117 @@
+// Copied from https://github.com/spectreconsole/spectre.console/blob/d79e6adc5f8e637fb35c88f987023ffda6707243/src/Spectre.Console/Internal/Backends/Ansi/AnsiDetector.cs
+// MIT License - Copyright(c) 2020 Patrik Svensson, Phil Scott, Nils Andresen
+// which is partially based on https://github.com/keqingrong/supports-ansi/blob/master/index.js
+// <auto-generated/>
+
+using System;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text.RegularExpressions;
+using Windows.Win32;
+using Windows.Win32.System.Console;
+
+namespace Spectre.Console;
+
+internal static class AnsiDetector
+{
+    private static readonly Regex[] _regexes =
+    [
+        new("^xterm"), // xterm, PuTTY, Mintty
+        new("^rxvt"), // RXVT
+        new("^eterm"), // Eterm
+        new("^screen"), // GNU screen, tmux
+        new("tmux"), // tmux
+        new("^vt100"), // DEC VT series
+        new("^vt102"), // DEC VT series
+        new("^vt220"), // DEC VT series
+        new("^vt320"), // DEC VT series
+        new("ansi"), // ANSI
+        new("scoansi"), // SCO ANSI
+        new("cygwin"), // Cygwin, MinGW
+        new("linux"), // Linux console
+        new("konsole"), // Konsole
+        new("bvterm"), // Bitvise SSH Client
+        new("^st-256color"), // Suckless Simple Terminal, st
+        new("alacritty"), // Alacritty
+    ];
+
+    public static (bool SupportsAnsi, bool LegacyConsole) Detect(bool stdError, bool upgrade)
+    {
+        // Running on Windows?
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+        {
+            // Running under ConEmu?
+            var conEmu = Environment.GetEnvironmentVariable("ConEmuANSI");
+            if (!string.IsNullOrEmpty(conEmu) && conEmu.Equals("On", StringComparison.OrdinalIgnoreCase))
+            {
+                return (true, false);
+            }
+
+            var supportsAnsi = WindowsSupportsAnsi(upgrade, stdError, out var legacyConsole);
+            return (supportsAnsi, legacyConsole);
+        }
+
+        return DetectFromTerm();
+    }
+
+    private static (bool SupportsAnsi, bool LegacyConsole) DetectFromTerm()
+    {
+        // Check if the terminal is of type ANSI/VT100/xterm compatible.
+        var term = Environment.GetEnvironmentVariable("TERM");
+        if (!string.IsNullOrWhiteSpace(term))
+        {
+            if (_regexes.Any(regex => regex.IsMatch(term)))
+            {
+                return (true, false);
+            }
+        }
+
+        return (false, true);
+    }
+
+    private static bool WindowsSupportsAnsi(bool upgrade, bool stdError, out bool isLegacy)
+    {
+        isLegacy = false;
+
+        try
+        {
+            var @out = PInvoke.GetStdHandle_SafeHandle(stdError ? STD_HANDLE.STD_ERROR_HANDLE :STD_HANDLE.STD_OUTPUT_HANDLE);
+
+            if (!PInvoke.GetConsoleMode(@out, out var mode))
+            {
+                // Could not get console mode, try TERM (set in cygwin, WSL-Shell).
+                var (ansiFromTerm, legacyFromTerm) = DetectFromTerm();
+
+                isLegacy = ansiFromTerm ? legacyFromTerm : isLegacy;
+                return ansiFromTerm;
+            }
+
+            if ((mode & CONSOLE_MODE.ENABLE_VIRTUAL_TERMINAL_PROCESSING) == 0||true)
+            {
+                isLegacy = true;
+
+                if (!upgrade)
+                {
+                    return false;
+                }
+
+                // Try enable ANSI support.
+                mode |= CONSOLE_MODE.ENABLE_VIRTUAL_TERMINAL_PROCESSING | CONSOLE_MODE.DISABLE_NEWLINE_AUTO_RETURN;
+                if (!PInvoke.SetConsoleMode(@out, mode))
+                {
+                    // Enabling failed.
+                    return false;
+                }
+
+                isLegacy = false;
+            }
+
+            return true;
+        }
+        catch
+        {
+            // All we know here is that we don't support ANSI.
+            return false;
+        }
+    }
+}

DepotDownloader/CDNClientPool.cs

@@ -1,274 +1,93 @@
-using SteamKit2;
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
 using System;
-using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading;
 using System.Threading.Tasks;
+using SteamKit2.CDN;
 
 namespace DepotDownloader
 {
     /// <summary>
-    /// CDNClientPool provides a pool of CDNClients to CDN endpoints
-    /// CDNClients that get re-used will be initialized for the correct depots
+    /// CDNClientPool provides a pool of connections to CDN endpoints, requesting CDN tokens as needed
     /// </summary>
     class CDNClientPool
     {
-        private const int ServerEndpointMinimumSize = 8;
-
-        private Steam3Session steamSession;
-
-        private ConcurrentBag<CDNClient> activeClientPool;
-        private ConcurrentDictionary<CDNClient, Tuple<uint, CDNClient.Server>> activeClientAuthed;
-        private BlockingCollection<CDNClient.Server> availableServerEndpoints;
+        private readonly Steam3Session steamSession;
+        private readonly uint appId;
+        public Client CDNClient { get; }
+        public Server ProxyServer { get; private set; }
 
-        private AutoResetEvent populatePoolEvent;
-        private Task monitorTask;
-        private CancellationTokenSource shutdownToken;
-        public CancellationTokenSource ExhaustedToken { get; set; }
+        private readonly List<Server> servers = [];
+        private int nextServer;
 
-        public CDNClientPool(Steam3Session steamSession)
+        public CDNClientPool(Steam3Session steamSession, uint appId)
         {
             this.steamSession = steamSession;
-
-            activeClientPool = new ConcurrentBag<CDNClient>();
-            activeClientAuthed = new ConcurrentDictionary<CDNClient, Tuple<uint, CDNClient.Server>>();
-            availableServerEndpoints = new BlockingCollection<CDNClient.Server>();
-
-            populatePoolEvent = new AutoResetEvent(true);
-            shutdownToken = new CancellationTokenSource();
-
-            monitorTask = Task.Factory.StartNew(ConnectionPoolMonitorAsync).Unwrap();
+            this.appId = appId;
+            CDNClient = new Client(steamSession.steamClient);
         }
 
-        public void Shutdown()
+        public async Task UpdateServerList()
         {
-            shutdownToken.Cancel();
-        }
+            var servers = await this.steamSession.steamContent.GetServersForSteamPipe();
 
-        private async Task<IReadOnlyCollection<CDNClient.Server>> FetchBootstrapServerListAsync()
-        {
-            while (!shutdownToken.IsCancellationRequested)
-            {
-                try
+            ProxyServer = servers.Where(x => x.UseAsProxy).FirstOrDefault();
+
+            var weightedCdnServers = servers
+                .Where(server =>
                 {
-                    var cdnServers = await ContentServerDirectoryService.LoadAsync(this.steamSession.steamClient.Configuration, ContentDownloader.Config.CellID, shutdownToken.Token);
-                    if (cdnServers != null)
-                    {
-                        return cdnServers;
-                    }
-                }
-                catch (Exception ex)
+                    var isEligibleForApp = server.AllowedAppIds.Length == 0 || server.AllowedAppIds.Contains(appId);
+                    return isEligibleForApp && (server.Type == "SteamCache" || server.Type == "CDN");
+                })
+                .Select(server =>
                 {
-                    Console.WriteLine("Failed to retrieve content server list: {0}", ex.Message);
-                }
-            }
-
-            return null;
-        }
+                    AccountSettingsStore.Instance.ContentServerPenalty.TryGetValue(server.Host, out var penalty);
 
-        private async Task ConnectionPoolMonitorAsync()
-        {
-            bool didPopulate = false;
+                    return (server, penalty);
+                })
+                .OrderBy(pair => pair.penalty).ThenBy(pair => pair.server.WeightedLoad);
 
-            while (!shutdownToken.IsCancellationRequested)
+            foreach (var (server, weight) in weightedCdnServers)
             {
-                populatePoolEvent.WaitOne(TimeSpan.FromSeconds(1));
-
-                // We want the Steam session so we can take the CellID from the session and pass it through to the ContentServer Directory Service
-                if (availableServerEndpoints.Count < ServerEndpointMinimumSize &&
-                    steamSession.steamClient.IsConnected)
+                for (var i = 0; i < server.NumEntries; i++)
                 {
-                    var servers = await FetchBootstrapServerListAsync().ConfigureAwait(false);
-
-                    if (servers == null)
-                    {
-                        ExhaustedToken?.Cancel();
-                        return;
-                    }
-
-                    var weightedCdnServers = servers.Select(x =>
-                    {
-                        int penalty = 0;
-                        AccountSettingsStore.Instance.ContentServerPenalty.TryGetValue(x.Host, out penalty);
-
-                        return Tuple.Create(x, penalty);
-                    }).OrderBy(x => x.Item2).ThenBy(x => x.Item1.WeightedLoad);
-
-                    foreach (var endpoint in weightedCdnServers)
-                    {
-                        for (var i = 0; i < endpoint.Item1.NumEntries; i++) {
-                            availableServerEndpoints.Add(endpoint.Item1);
-                        }
-                    }
-
-                    didPopulate = true;
-                } 
-                else if ( availableServerEndpoints.Count == 0 && !steamSession.steamClient.IsConnected && didPopulate )
-                {
-                    ExhaustedToken?.Cancel();
-                    return;
+                    this.servers.Add(server);
                 }
             }
-        }
-
-        private void ReleaseConnection(CDNClient client)
-        {
-            Tuple<uint, CDNClient.Server> authData;
-            activeClientAuthed.TryRemove(client, out authData);
-        }
 
-        private async Task<CDNClient> BuildConnectionAsync(uint appId, uint depotId, byte[] depotKey, CDNClient.Server serverSeed, CancellationToken token)
-        {
-            CDNClient.Server server = null;
-            CDNClient client = null;
-
-            while (client == null)
+            if (this.servers.Count == 0)
             {
-                // if we want to re-initialize a specific content server, try that one first
-                if (serverSeed != null)
-                {
-                    server = serverSeed;
-                    serverSeed = null;
-                }
-                else
-                {
-                    if (availableServerEndpoints.Count < ServerEndpointMinimumSize)
-                    {
-                        populatePoolEvent.Set();
-                    }
-
-                    server = availableServerEndpoints.Take(token);
-                }
-
-                client = new CDNClient(steamSession.steamClient, steamSession.AppTickets[depotId]);
-
-                string cdnAuthToken = null;
-
-                try
-                {
-                    if (server.Type == "CDN" || server.Type == "SteamCache")
-                    {
-                        steamSession.RequestCDNAuthToken(appId, depotId, server.Host);
-
-                        var cdnKey = string.Format("{0:D}:{1}", depotId, steamSession.ResolveCDNTopLevelHost(server.Host));
-                        SteamApps.CDNAuthTokenCallback authTokenCallback;
-
-                        if (steamSession.CDNAuthTokens.TryGetValue(cdnKey, out authTokenCallback))
-                        {
-                            cdnAuthToken = authTokenCallback.Token;
-                        }
-                        else
-                        {
-                            throw new Exception(String.Format("Failed to retrieve CDN token for server {0} depot {1}", server.Host, depotId));
-                        }
-                    }
-
-                    await client.ConnectAsync(server).ConfigureAwait(false);
-                    await client.AuthenticateDepotAsync(depotId, depotKey, cdnAuthToken).ConfigureAwait(false);
-                }
-                catch (Exception ex)
-                {
-                    client = null;
-
-                    Console.WriteLine("Failed to connect to content server {0}: {1}", server, ex.Message);
-
-                    int penalty = 0;
-                    AccountSettingsStore.Instance.ContentServerPenalty.TryGetValue(server.Host, out penalty);
-                    AccountSettingsStore.Instance.ContentServerPenalty[server.Host] = penalty + 1;
-                }
+                throw new Exception("Failed to retrieve any download servers.");
             }
-
-            Console.WriteLine("Initialized connection to content server {0} with depot id {1}", server, depotId);
-
-            activeClientAuthed[client] = Tuple.Create(depotId, server);
-            return client;
         }
 
-        private async Task<bool> ReauthConnectionAsync(CDNClient client, CDNClient.Server server, uint appId, uint depotId, byte[] depotKey)
+        public Server GetConnection()
         {
-            DebugLog.Assert(server.Type == "CDN" || server.Type == "SteamCache" || steamSession.AppTickets[depotId] == null, "CDNClientPool", "Re-authing a CDN or anonymous connection");
-
-            String cdnAuthToken = null;
-
-            try
-            {
-                if (server.Type == "CDN" || server.Type == "SteamCache")
-                {
-                    steamSession.RequestCDNAuthToken(appId, depotId, server.Host);
-
-                    var cdnKey = string.Format("{0:D}:{1}", depotId, steamSession.ResolveCDNTopLevelHost(server.Host));
-                    SteamApps.CDNAuthTokenCallback authTokenCallback;
-
-                    if (steamSession.CDNAuthTokens.TryGetValue(cdnKey, out authTokenCallback))
-                    {
-                        cdnAuthToken = authTokenCallback.Token;
-                    }
-                    else
-                    {
-                        throw new Exception(String.Format("Failed to retrieve CDN token for server {0} depot {1}", server.Host, depotId));
-                    }
-                }
-
-                await client.AuthenticateDepotAsync(depotId, depotKey, cdnAuthToken).ConfigureAwait(false);
-                activeClientAuthed[client] = Tuple.Create(depotId, server);
-                return true;
-            }
-            catch (Exception ex)
-            {
-                Console.WriteLine("Failed to reauth to content server {0}: {1}", server, ex.Message);
-            }
-
-            return false;
+            return servers[nextServer % servers.Count];
         }
 
-        public async Task<CDNClient> GetConnectionForDepotAsync(uint appId, uint depotId, byte[] depotKey, CancellationToken token)
+        public void ReturnConnection(Server server)
         {
-            CDNClient client = null;
-
-            Tuple<uint, CDNClient.Server> authData;
+            if (server == null) return;
 
-            activeClientPool.TryTake(out client);
+            // nothing to do, maybe remove from ContentServerPenalty?
+        }
 
-            // if we couldn't find a connection, make one now
-            if (client == null)
-            {
-                client = await BuildConnectionAsync(appId, depotId, depotKey, null, token).ConfigureAwait(false);
-            }
+        public void ReturnBrokenConnection(Server server)
+        {
+            if (server == null) return;
 
-            // if we couldn't find the authorization data or it's not authed to this depotid, re-initialize
-            if (!activeClientAuthed.TryGetValue(client, out authData) || authData.Item1 != depotId)
+            lock (servers)
             {
-                if ((authData.Item2.Type == "CDN" || authData.Item2.Type == "SteamCache") && await ReauthConnectionAsync(client, authData.Item2, appId, depotId, depotKey).ConfigureAwait(false))
-                {
-                    Console.WriteLine("Re-authed CDN connection to content server {0} from {1} to {2}", authData.Item2, authData.Item1, depotId);
-                }                
-                else if (authData.Item2.Type == "CS" && steamSession.AppTickets[depotId] == null && await ReauthConnectionAsync(client, authData.Item2, appId, depotId, depotKey).ConfigureAwait(false))
-                {
-                    Console.WriteLine("Re-authed anonymous connection to content server {0} from {1} to {2}", authData.Item2, authData.Item1, depotId);
-                }
-                else
+                if (servers[nextServer % servers.Count] == server)
                 {
-                    ReleaseConnection(client);
-                    client = await BuildConnectionAsync(appId, depotId, depotKey, authData.Item2, token).ConfigureAwait(false);
+                    nextServer++;
+
+                    // TODO: Add server to ContentServerPenalty
                 }
             }
-
-            return client;
-        }
-        
-        public void ReturnConnection(CDNClient client)
-        {
-            if (client == null) return;
-
-            activeClientPool.Add(client);
-        }
-
-        public void ReturnBrokenConnection(CDNClient client)
-        {
-            if (client == null) return;
-
-            ReleaseConnection(client);
         }
     }
 }

DepotDownloader/ConsoleAuthenticator.cs

@@ -0,0 +1,76 @@
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System;
+using System.Threading.Tasks;
+using SteamKit2.Authentication;
+
+namespace DepotDownloader
+{
+    // This is practically copied from https://github.com/SteamRE/SteamKit/blob/master/SteamKit2/SteamKit2/Steam/Authentication/UserConsoleAuthenticator.cs
+    internal class ConsoleAuthenticator : IAuthenticator
+    {
+        /// <inheritdoc />
+        public Task<string> GetDeviceCodeAsync(bool previousCodeWasIncorrect)
+        {
+            if (previousCodeWasIncorrect)
+            {
+                Console.Error.WriteLine("The previous 2-factor auth code you have provided is incorrect.");
+            }
+
+            string code;
+
+            do
+            {
+                Console.Error.Write("STEAM GUARD! Please enter your 2-factor auth code from your authenticator app: ");
+                code = Console.ReadLine()?.Trim();
+
+                if (code == null)
+                {
+                    break;
+                }
+            }
+            while (string.IsNullOrEmpty(code));
+
+            return Task.FromResult(code!);
+        }
+
+        /// <inheritdoc />
+        public Task<string> GetEmailCodeAsync(string email, bool previousCodeWasIncorrect)
+        {
+            if (previousCodeWasIncorrect)
+            {
+                Console.Error.WriteLine("The previous 2-factor auth code you have provided is incorrect.");
+            }
+
+            string code;
+
+            do
+            {
+                Console.Error.Write($"STEAM GUARD! Please enter the auth code sent to the email at {email}: ");
+                code = Console.ReadLine()?.Trim();
+
+                if (code == null)
+                {
+                    break;
+                }
+            }
+            while (string.IsNullOrEmpty(code));
+
+            return Task.FromResult(code!);
+        }
+
+        /// <inheritdoc />
+        public Task<bool> AcceptDeviceConfirmationAsync()
+        {
+            if (ContentDownloader.Config.SkipAppConfirmation)
+            {
+                return Task.FromResult(false);
+            }
+
+            Console.Error.WriteLine("STEAM GUARD! Use the Steam Mobile App to confirm your sign in...");
+
+            return Task.FromResult(true);
+        }
+    }
+}

DepotDownloader/DepotConfigStore.cs

@@ -1,8 +1,11 @@
-using System;
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System;
 using System.Collections.Generic;
-using ProtoBuf;
 using System.IO;
 using System.IO.Compression;
+using ProtoBuf;
 
 namespace DepotDownloader
 {
@@ -12,11 +15,11 @@ namespace DepotDownloader
         [ProtoMember(1)]
         public Dictionary<uint, ulong> InstalledManifestIDs { get; private set; }
 
-        string FileName = null;
+        string FileName;
 
         DepotConfigStore()
         {
-            InstalledManifestIDs = new Dictionary<uint, ulong>();
+            InstalledManifestIDs = [];
         }
 
         static bool Loaded
@@ -24,7 +27,7 @@ namespace DepotDownloader
             get { return Instance != null; }
         }
 
-        public static DepotConfigStore Instance = null;
+        public static DepotConfigStore Instance;
 
         public static void LoadFromFile(string filename)
         {
@@ -33,9 +36,9 @@ namespace DepotDownloader
 
             if (File.Exists(filename))
             {
-                using (FileStream fs = File.Open(filename, FileMode.Open))
-                using (DeflateStream ds = new DeflateStream(fs, CompressionMode.Decompress))
-                    Instance = ProtoBuf.Serializer.Deserialize<DepotConfigStore>(ds);
+                using var fs = File.Open(filename, FileMode.Open);
+                using var ds = new DeflateStream(fs, CompressionMode.Decompress);
+                Instance = Serializer.Deserialize<DepotConfigStore>(ds);
             }
             else
             {
@@ -50,9 +53,9 @@ namespace DepotDownloader
             if (!Loaded)
                 throw new Exception("Saved config before loading");
 
-            using (FileStream fs = File.Open(Instance.FileName, FileMode.Create))
-            using (DeflateStream ds = new DeflateStream(fs, CompressionMode.Compress))
-                ProtoBuf.Serializer.Serialize<DepotConfigStore>(ds, Instance);
+            using var fs = File.Open(Instance.FileName, FileMode.Create);
+            using var ds = new DeflateStream(fs, CompressionMode.Compress);
+            Serializer.Serialize(ds, Instance);
         }
     }
 }

DepotDownloader/DepotDownloader.csproj

@@ -1,11 +1,32 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
-    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
+    <TargetFramework>net9.0</TargetFramework>
+    <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
+    <RollForward>LatestMajor</RollForward>
+    <Version>3.4.0</Version>
+    <Description>Steam Downloading Utility</Description>
+    <Authors>SteamRE Team</Authors>
+    <Copyright>Copyright © SteamRE Team 2025</Copyright>
+    <ApplicationIcon>..\Icon\DepotDownloader.ico</ApplicationIcon>
+    <Deterministic>true</Deterministic>
+    <TreatWarningsAsErrors Condition="'$(ContinuousIntegrationBuild)' == 'true'">true</TreatWarningsAsErrors>
+    <InvariantGlobalization>true</InvariantGlobalization>
   </PropertyGroup>
+
   <ItemGroup>
-    <PackageReference Include="protobuf-net" Version="2.4.4" />
-    <PackageReference Include="SteamKit2" Version="2.2.0" />
+    <None Include="..\LICENSE" Link="LICENSE">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
-</Project>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.3.183">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="protobuf-net" Version="3.2.52" />
+    <PackageReference Include="QRCoder" Version="1.6.0" />
+    <PackageReference Include="SteamKit2" Version="3.3.0" />
+  </ItemGroup>
+</Project>

DepotDownloader/DownloadConfig.cs

@@ -1,32 +1,36 @@
-using System.Collections.Generic;
-using System.Text.RegularExpressions;
-
-namespace DepotDownloader
-{
-    class DownloadConfig
-    {
-        public int CellID { get; set; }
-        public bool DownloadAllPlatforms { get; set; }
-        public bool DownloadManifestOnly { get; set; }
-        public string InstallDirectory { get; set; }
-
-        public bool UsingFileList { get; set; }
-        public List<string> FilesToDownload { get; set; }
-        public List<Regex> FilesToDownloadRegex { get; set; }
-
-        public bool UsingExclusionList { get; set; }
-
-        public string BetaPassword { get; set; }
-
-        public bool VerifyAll { get; set; }
-
-        public int MaxServers { get; set; }
-        public int MaxDownloads { get; set; }
-
-        public string SuppliedPassword { get; set; }
-        public bool RememberPassword { get; set; }
-
-        // A Steam LoginID to allow multiple concurrent connections
-        public uint? LoginID {get; set; }
-    }
-}
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
+
+namespace DepotDownloader
+{
+    class DownloadConfig
+    {
+        public int CellID { get; set; }
+        public bool DownloadAllPlatforms { get; set; }
+        public bool DownloadAllArchs { get; set; }
+        public bool DownloadAllLanguages { get; set; }
+        public bool DownloadManifestOnly { get; set; }
+        public string InstallDirectory { get; set; }
+
+        public bool UsingFileList { get; set; }
+        public HashSet<string> FilesToDownload { get; set; }
+        public List<Regex> FilesToDownloadRegex { get; set; }
+
+        public string BetaPassword { get; set; }
+
+        public bool VerifyAll { get; set; }
+
+        public int MaxDownloads { get; set; }
+
+        public bool RememberPassword { get; set; }
+
+        // A Steam LoginID to allow multiple concurrent connections
+        public uint? LoginID { get; set; }
+
+        public bool UseQrCode { get; set; }
+        public bool SkipAppConfirmation { get; set; }
+    }
+}

DepotDownloader/HttpClientFactory.cs

@@ -0,0 +1,52 @@
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System.IO;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Net.Sockets;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace DepotDownloader
+{
+    // This is based on the dotnet issue #44686 and its workaround at https://github.com/dotnet/runtime/issues/44686#issuecomment-733797994
+    // We don't know if the IPv6 stack is functional.
+    class HttpClientFactory
+    {
+        public static HttpClient CreateHttpClient()
+        {
+            var client = new HttpClient(new SocketsHttpHandler
+            {
+                ConnectCallback = IPv4ConnectAsync
+            });
+
+            var assemblyVersion = typeof(HttpClientFactory).Assembly.GetName().Version.ToString(fieldCount: 3);
+            client.DefaultRequestHeaders.UserAgent.Add(new ProductInfoHeaderValue("DepotDownloader", assemblyVersion));
+
+            return client;
+        }
+
+        static async ValueTask<Stream> IPv4ConnectAsync(SocketsHttpConnectionContext context, CancellationToken cancellationToken)
+        {
+            // By default, we create dual-mode sockets:
+            // Socket socket = new Socket(SocketType.Stream, ProtocolType.Tcp);
+
+            var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
+            {
+                NoDelay = true
+            };
+
+            try
+            {
+                await socket.ConnectAsync(context.DnsEndPoint, cancellationToken).ConfigureAwait(false);
+                return new NetworkStream(socket, ownsSocket: true);
+            }
+            catch
+            {
+                socket.Dispose();
+                throw;
+            }
+        }
+    }
+}

DepotDownloader/HttpDiagnosticEventListener.cs

@@ -0,0 +1,45 @@
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System;
+using System.Diagnostics.Tracing;
+using System.Text;
+
+namespace DepotDownloader
+{
+    internal sealed class HttpDiagnosticEventListener : EventListener
+    {
+        public const EventKeywords TasksFlowActivityIds = (EventKeywords)0x80;
+
+        protected override void OnEventSourceCreated(EventSource eventSource)
+        {
+            if (eventSource.Name == "System.Net.Http" ||
+                eventSource.Name == "System.Net.Sockets" ||
+                eventSource.Name == "System.Net.Security" ||
+                eventSource.Name == "System.Net.NameResolution")
+            {
+                EnableEvents(eventSource, EventLevel.LogAlways);
+            }
+            else if (eventSource.Name == "System.Threading.Tasks.TplEventSource")
+            {
+                EnableEvents(eventSource, EventLevel.LogAlways, TasksFlowActivityIds);
+            }
+        }
+
+        protected override void OnEventWritten(EventWrittenEventArgs eventData)
+        {
+            var sb = new StringBuilder().Append($"{eventData.TimeStamp:HH:mm:ss.fffffff}  {eventData.EventSource.Name}.{eventData.EventName}(");
+            for (var i = 0; i < eventData.Payload?.Count; i++)
+            {
+                sb.Append(eventData.PayloadNames?[i]).Append(": ").Append(eventData.Payload[i]);
+                if (i < eventData.Payload?.Count - 1)
+                {
+                    sb.Append(", ");
+                }
+            }
+
+            sb.Append(')');
+            Console.WriteLine(sb.ToString());
+        }
+    }
+}

DepotDownloader/NativeMethods.txt

@@ -0,0 +1,5 @@
+GetConsoleMode
+GetConsoleProcessList
+GetStdHandle
+MessageBox
+SetConsoleMode

DepotDownloader/PlatformUtilities.cs

@@ -0,0 +1,51 @@
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+
+namespace DepotDownloader
+{
+    static class PlatformUtilities
+    {
+        public static void SetExecutable(string path, bool value)
+        {
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                return;
+            }
+
+            const UnixFileMode ModeExecute = UnixFileMode.UserExecute | UnixFileMode.GroupExecute | UnixFileMode.OtherExecute;
+
+            var mode = File.GetUnixFileMode(path);
+            var hasExecuteMask = (mode & ModeExecute) == ModeExecute;
+            if (hasExecuteMask != value)
+            {
+                File.SetUnixFileMode(path, value
+                    ? mode | ModeExecute
+                    : mode & ~ModeExecute);
+            }
+        }
+
+        [SupportedOSPlatform("windows5.0")]
+        public static void VerifyConsoleLaunch()
+        {
+            // Reference: https://devblogs.microsoft.com/oldnewthing/20160125-00/?p=92922
+            var processList = new uint[2];
+            var processCount = Windows.Win32.PInvoke.GetConsoleProcessList(processList);
+
+            if (processCount != 1)
+            {
+                return;
+            }
+
+            _ = Windows.Win32.PInvoke.MessageBox(
+                Windows.Win32.Foundation.HWND.Null,
+                "Depot Downloader is a console application; there is no GUI.\n\nIf you do not pass any command line parameters, it prints usage info and exits.\n\nYou must use this from a terminal/console.",
+                "Depot Downloader",
+                Windows.Win32.UI.WindowsAndMessaging.MESSAGEBOX_STYLE.MB_OK | Windows.Win32.UI.WindowsAndMessaging.MESSAGEBOX_STYLE.MB_ICONWARNING
+            );
+        }
+    }
+}

DepotDownloader/Program.cs

@@ -1,330 +1,550 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Text.RegularExpressions;
-using SteamKit2;
-using System.ComponentModel;
-using System.Threading.Tasks;
-using System.Runtime.InteropServices;
-namespace DepotDownloader
-{
-    class Program
-    {
-        static int Main( string[] args )
-            => MainAsync( args ).GetAwaiter().GetResult();
-
-        static async Task<int> MainAsync( string[] args )
-        {
-            if ( args.Length == 0 )
-            {
-                PrintUsage();
-                return 1;
-            }
-
-            DebugLog.Enabled = false;
-
-            AccountSettingsStore.LoadFromFile( "account.config" );
-
-            #region Common Options
-
-            if ( HasParameter( args, "-debug" ) )
-            {
-                DebugLog.Enabled = true;
-                DebugLog.AddListener( ( category, message ) =>
-                {
-                    Console.WriteLine( "[{0}] {1}", category, message );
-                });
-            }
-
-            string username = GetParameter<string>( args, "-username" ) ?? GetParameter<string>( args, "-user" );
-            string password = GetParameter<string>( args, "-password" ) ?? GetParameter<string>( args, "-pass" );
-            ContentDownloader.Config.RememberPassword = HasParameter( args, "-remember-password" );
-
-            ContentDownloader.Config.DownloadManifestOnly = HasParameter( args, "-manifest-only" );
-
-            int cellId = GetParameter<int>( args, "-cellid", -1 );
-            if ( cellId == -1 )
-            {
-                cellId = 0;
-            }
-
-            ContentDownloader.Config.CellID = cellId;
-
-            string fileList = GetParameter<string>( args, "-filelist" );
-            string[] files = null;
-
-            if ( fileList != null )
-            {
-                try
-                {
-                    string fileListData = File.ReadAllText(fileList);
-                    files = fileListData.Split( new char[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries );
-
-                    ContentDownloader.Config.UsingFileList = true;
-                    ContentDownloader.Config.FilesToDownload = new List<string>();
-                    ContentDownloader.Config.FilesToDownloadRegex = new List<Regex>();
-
-                    var isWindows = RuntimeInformation.IsOSPlatform( OSPlatform.Windows );
-                    foreach ( var fileEntry in files )
-                    {
-                        try
-                        {
-                            string fileEntryProcessed;
-                            if ( isWindows )
-                            {
-                                // On Windows, ensure that forward slashes can match either forward or backslashes in depot paths
-                                fileEntryProcessed = fileEntry.Replace( "/", "[\\\\|/]" );
-                            }
-                            else
-                            {
-                                // On other systems, treat / normally
-                                fileEntryProcessed = fileEntry;
-                            }
-                            Regex rgx = new Regex( fileEntryProcessed, RegexOptions.Compiled | RegexOptions.IgnoreCase );
-                            ContentDownloader.Config.FilesToDownloadRegex.Add( rgx );
-                        }
-                        catch
-                        {
-                            // For anything that can't be processed as a Regex, allow both forward and backward slashes to match
-                            // on Windows
-                            if( isWindows )
-                            {
-                                ContentDownloader.Config.FilesToDownload.Add( fileEntry.Replace( "/", "\\" ) );
-                            }
-                            ContentDownloader.Config.FilesToDownload.Add( fileEntry );
-                            continue;
-                        }
-                    }
-
-                    Console.WriteLine( "Using filelist: '{0}'.", fileList );
-                }
-                catch (Exception ex)
-                {
-                    Console.WriteLine( "Warning: Unable to load filelist: {0}", ex.ToString() );
-                }
-            }
-
-            ContentDownloader.Config.InstallDirectory = GetParameter<string>( args, "-dir" );
-
-            ContentDownloader.Config.VerifyAll = HasParameter( args, "-verify-all" ) || HasParameter( args, "-verify_all" ) || HasParameter( args, "-validate" );
-            ContentDownloader.Config.MaxServers = GetParameter<int>( args, "-max-servers", 20 );
-            ContentDownloader.Config.MaxDownloads = GetParameter<int>( args, "-max-downloads", 4 );
-            ContentDownloader.Config.MaxServers = Math.Max( ContentDownloader.Config.MaxServers, ContentDownloader.Config.MaxDownloads );
-            ContentDownloader.Config.LoginID = HasParameter( args, "-loginid" ) ? (uint?)GetParameter<uint>( args, "-loginid" ) : null;
-
-            #endregion
-
-            ulong pubFile = GetParameter<ulong>( args, "-pubfile", ContentDownloader.INVALID_MANIFEST_ID );
-            if ( pubFile != ContentDownloader.INVALID_MANIFEST_ID )
-            {
-                #region Pubfile Downloading
-
-                if ( InitializeSteam( username, password ) )
-                {
-                    try
-                    {
-                        await ContentDownloader.DownloadPubfileAsync( pubFile ).ConfigureAwait( false );
-                    }
-                    catch ( Exception ex ) when (
-                        ex is ContentDownloaderException
-                        || ex is OperationCanceledException )
-                    {
-                        Console.WriteLine( ex.Message );
-                        return 1;
-                    }
-                    catch ( Exception e )
-                    {
-                        Console.WriteLine( "Download failed to due to an unhandled exception: {0}", e.Message );
-                        throw;
-                    }
-                    finally
-                    {
-                        ContentDownloader.ShutdownSteam3();
-                    }
-                }
-                else
-                {
-                    Console.WriteLine( "Error: InitializeSteam failed" );
-                    return 1;
-                }
-
-                #endregion
-            }
-            else
-            {
-                #region App downloading
-
-                string branch = GetParameter<string>( args, "-branch" ) ?? GetParameter<string>( args, "-beta" ) ?? ContentDownloader.DEFAULT_BRANCH;
-                ContentDownloader.Config.BetaPassword = GetParameter<string>( args, "-betapassword" );
-
-                ContentDownloader.Config.DownloadAllPlatforms = HasParameter( args, "-all-platforms" );
-                string os = GetParameter<string>( args, "-os", null );
-
-                if ( ContentDownloader.Config.DownloadAllPlatforms && !String.IsNullOrEmpty( os ) )
-                {
-                    Console.WriteLine("Error: Cannot specify -os when -all-platforms is specified.");
-                    return 1;
-                }
-
-                uint appId = GetParameter<uint>( args, "-app", ContentDownloader.INVALID_APP_ID );
-                if ( appId == ContentDownloader.INVALID_APP_ID )
-                {
-                    Console.WriteLine( "Error: -app not specified!" );
-                    return 1;
-                }
-
-                uint depotId;
-                bool isUGC = false;
-
-                ulong manifestId = GetParameter<ulong>( args, "-ugc", ContentDownloader.INVALID_MANIFEST_ID );
-                if ( manifestId != ContentDownloader.INVALID_MANIFEST_ID )
-                {
-                    depotId = appId;
-                    isUGC = true;
-                }
-                else
-                {
-                    depotId = GetParameter<uint>( args, "-depot", ContentDownloader.INVALID_DEPOT_ID );
-                    manifestId = GetParameter<ulong>( args, "-manifest", ContentDownloader.INVALID_MANIFEST_ID );
-                    if ( depotId == ContentDownloader.INVALID_DEPOT_ID && manifestId != ContentDownloader.INVALID_MANIFEST_ID )
-                    {
-                        Console.WriteLine( "Error: -manifest requires -depot to be specified" );
-                        return 1;
-                    }
-                }
-
-                if ( InitializeSteam( username, password ) )
-                {
-                    try
-                    {
-                        await ContentDownloader.DownloadAppAsync( appId, depotId, manifestId, branch, os, isUGC ).ConfigureAwait( false );
-                    }
-                    catch ( Exception ex ) when (
-                        ex is ContentDownloaderException
-                        || ex is OperationCanceledException )
-                    {
-                        Console.WriteLine( ex.Message );
-                        return 1;
-                    }
-                    catch ( Exception e )
-                    {
-                        Console.WriteLine( "Download failed to due to an unhandled exception: {0}", e.Message );
-                        throw;
-                    }
-                    finally
-                    {
-                        ContentDownloader.ShutdownSteam3();
-                    }
-                }
-                else
-                {
-                    Console.WriteLine( "Error: InitializeSteam failed" );
-                    return 1;
-                }
-
-                #endregion
-            }
-            
-            return 0;
-        }
-
-        static bool InitializeSteam( string username, string password )
-        {
-            if ( username != null && password == null && ( !ContentDownloader.Config.RememberPassword || !AccountSettingsStore.Instance.LoginKeys.ContainsKey( username ) ) )
-            {
-                do
-                {
-                    Console.Write( "Enter account password for \"{0}\": ", username );
-                    if ( Console.IsInputRedirected )
-                    {
-                        password = Console.ReadLine();
-                    }
-                    else
-                    {
-                        // Avoid console echoing of password
-                        password = Util.ReadPassword();
-                    }
-                    Console.WriteLine();
-                } while ( String.Empty == password );
-            }
-            else if ( username == null )
-            {
-                Console.WriteLine( "No username given. Using anonymous account with dedicated server subscription." );
-            }
-
-            // capture the supplied password in case we need to re-use it after checking the login key
-            ContentDownloader.Config.SuppliedPassword = password;
-
-            return ContentDownloader.InitializeSteam3( username, password );
-        }
-
-        static int IndexOfParam( string[] args, string param )
-        {
-            for ( int x = 0; x < args.Length; ++x )
-            {
-                if ( args[ x ].Equals( param, StringComparison.OrdinalIgnoreCase ) )
-                    return x;
-            }
-            return -1;
-        }
-        static bool HasParameter( string[] args, string param )
-        {
-            return IndexOfParam( args, param ) > -1;
-        }
-
-        static T GetParameter<T>( string[] args, string param, T defaultValue = default( T ) )
-        {
-            int index = IndexOfParam( args, param );
-
-            if ( index == -1 || index == ( args.Length - 1 ) )
-                return defaultValue;
-
-            string strParam = args[ index + 1 ];
-
-            var converter = TypeDescriptor.GetConverter( typeof( T ) );
-            if ( converter != null )
-            {
-                return ( T )converter.ConvertFromString( strParam );
-            }
-
-            return default( T );
-        }
-
-        static void PrintUsage()
-        {
-            Console.WriteLine();
-            Console.WriteLine( "Usage - downloading one or all depots for an app:" );
-            Console.WriteLine( "\tdepotdownloader -app <id> [-depot <id> [-manifest <id>] | [-ugc <id>]]" );
-            Console.WriteLine( "\t\t[-username <username> [-password <password>]] [other options]" );
-            Console.WriteLine();
-            Console.WriteLine( "Usage - downloading a Workshop item published via SteamUGC" );
-            Console.WriteLine( "\tdepotdownloader -pubfile <id> [-username <username> [-password <password>]]" );
-            Console.WriteLine();
-            Console.WriteLine( "Parameters:" );
-            Console.WriteLine( "\t-app <#>\t\t\t\t- the AppID to download." );
-            Console.WriteLine( "\t-depot <#>\t\t\t\t- the DepotID to download." );
-            Console.WriteLine( "\t-manifest <id>\t\t\t- manifest id of content to download (requires -depot, default: current for branch)." );
-            Console.WriteLine( "\t-ugc <#>\t\t\t\t- the UGC ID to download." );
-            Console.WriteLine( "\t-beta <branchname>\t\t\t- download from specified branch if available (default: Public)." );
-            Console.WriteLine( "\t-betapassword <pass>\t\t- branch password if applicable." );
-            Console.WriteLine( "\t-all-platforms\t\t\t- downloads all platform-specific depots when -app is used." );
-            Console.WriteLine( "\t-os <os>\t\t\t\t- the operating system for which to download the game (windows, macos or linux, default: OS the program is currently running on)" );
-            Console.WriteLine();
-            Console.WriteLine( "\t-pubfile <#>\t\t\t- the PublishedFileId to download. (Will automatically resolve to UGC id)" );
-            Console.WriteLine();
-            Console.WriteLine( "\t-username <user>\t\t- the username of the account to login to for restricted content.");
-            Console.WriteLine( "\t-password <pass>\t\t- the password of the account to login to for restricted content." );
-            Console.WriteLine( "\t-remember-password\t\t- if set, remember the password for subsequent logins of this user." );
-            Console.WriteLine();
-            Console.WriteLine( "\t-dir <installdir>\t\t- the directory in which to place downloaded files." );
-            Console.WriteLine( "\t-filelist <file.txt>\t- a list of files to download (from the manifest). Can optionally use regex to download only certain files." );
-            Console.WriteLine( "\t-validate\t\t\t\t- Include checksum verification of files already downloaded" );
-            Console.WriteLine();
-            Console.WriteLine( "\t-manifest-only\t\t\t- downloads a human readable manifest for any depots that would be downloaded." );
-            Console.WriteLine( "\t-cellid <#>\t\t\t\t- the overridden CellID of the content server to download from." );
-            Console.WriteLine( "\t-max-servers <#>\t\t- maximum number of content servers to use. (default: 8)." );
-            Console.WriteLine( "\t-max-downloads <#>\t\t- maximum number of chunks to download concurrently. (default: 4)." );
-            Console.WriteLine( "\t-loginid <#>\t\t- a unique 32-bit integer Steam LogonID in decimal, required if running multiple instances of DepotDownloader concurrently." );
-        }
-    }
-}
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using SteamKit2;
+using SteamKit2.CDN;
+
+namespace DepotDownloader
+{
+    class Program
+    {
+        private static bool[] consumedArgs;
+
+        static async Task<int> Main(string[] args)
+        {
+            if (args.Length == 0)
+            {
+                PrintVersion();
+                PrintUsage();
+
+                if (OperatingSystem.IsWindowsVersionAtLeast(5, 0))
+                {
+                    PlatformUtilities.VerifyConsoleLaunch();
+                }
+
+                return 0;
+            }
+
+            Ansi.Init();
+
+            DebugLog.Enabled = false;
+
+            AccountSettingsStore.LoadFromFile("account.config");
+
+            #region Common Options
+
+            // Not using HasParameter because it is case insensitive
+            if (args.Length == 1 && (args[0] == "-V" || args[0] == "--version"))
+            {
+                PrintVersion(true);
+                return 0;
+            }
+
+            consumedArgs = new bool[args.Length];
+
+            if (HasParameter(args, "-debug"))
+            {
+                PrintVersion(true);
+
+                DebugLog.Enabled = true;
+                DebugLog.AddListener((category, message) =>
+                {
+                    Console.WriteLine("[{0}] {1}", category, message);
+                });
+
+                var httpEventListener = new HttpDiagnosticEventListener();
+            }
+
+            var username = GetParameter<string>(args, "-username") ?? GetParameter<string>(args, "-user");
+            var password = GetParameter<string>(args, "-password") ?? GetParameter<string>(args, "-pass");
+            ContentDownloader.Config.RememberPassword = HasParameter(args, "-remember-password");
+            ContentDownloader.Config.UseQrCode = HasParameter(args, "-qr");
+            ContentDownloader.Config.SkipAppConfirmation = HasParameter(args, "-no-mobile");
+
+            if (username == null)
+            {
+                if (ContentDownloader.Config.RememberPassword && !ContentDownloader.Config.UseQrCode)
+                {
+                    Console.WriteLine("Error: -remember-password can not be used without -username or -qr.");
+                    return 1;
+                }
+            }
+            else if (ContentDownloader.Config.UseQrCode)
+            {
+                Console.WriteLine("Error: -qr can not be used with -username.");
+                return 1;
+            }
+
+            ContentDownloader.Config.DownloadManifestOnly = HasParameter(args, "-manifest-only");
+
+            var cellId = GetParameter(args, "-cellid", -1);
+            if (cellId == -1)
+            {
+                cellId = 0;
+            }
+
+            ContentDownloader.Config.CellID = cellId;
+
+            var fileList = GetParameter<string>(args, "-filelist");
+
+            if (fileList != null)
+            {
+                const string RegexPrefix = "regex:";
+
+                try
+                {
+                    ContentDownloader.Config.UsingFileList = true;
+                    ContentDownloader.Config.FilesToDownload = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+                    ContentDownloader.Config.FilesToDownloadRegex = [];
+
+                    var files = await File.ReadAllLinesAsync(fileList);
+
+                    foreach (var fileEntry in files)
+                    {
+                        if (string.IsNullOrWhiteSpace(fileEntry))
+                        {
+                            continue;
+                        }
+
+                        if (fileEntry.StartsWith(RegexPrefix))
+                        {
+                            var rgx = new Regex(fileEntry[RegexPrefix.Length..], RegexOptions.Compiled | RegexOptions.IgnoreCase);
+                            ContentDownloader.Config.FilesToDownloadRegex.Add(rgx);
+                        }
+                        else
+                        {
+                            ContentDownloader.Config.FilesToDownload.Add(fileEntry.Replace('\\', '/'));
+                        }
+                    }
+
+                    Console.WriteLine("Using filelist: '{0}'.", fileList);
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine("Warning: Unable to load filelist: {0}", ex);
+                }
+            }
+
+            ContentDownloader.Config.InstallDirectory = GetParameter<string>(args, "-dir");
+
+            ContentDownloader.Config.VerifyAll = HasParameter(args, "-verify-all") || HasParameter(args, "-verify_all") || HasParameter(args, "-validate");
+
+            if (HasParameter(args, "-use-lancache"))
+            {
+                await Client.DetectLancacheServerAsync();
+                if (Client.UseLancacheServer)
+                {
+                    Console.WriteLine("Detected Lancache server! Downloads will be directed through the Lancache.");
+
+                    // Increasing the number of concurrent downloads when the cache is detected since the downloads will likely
+                    // be served much faster than over the internet.  Steam internally has this behavior as well.
+                    if (!HasParameter(args, "-max-downloads"))
+                    {
+                        ContentDownloader.Config.MaxDownloads = 25;
+                    }
+                }
+            }
+
+            ContentDownloader.Config.MaxDownloads = GetParameter(args, "-max-downloads", 8);
+            ContentDownloader.Config.LoginID = HasParameter(args, "-loginid") ? GetParameter<uint>(args, "-loginid") : null;
+
+            #endregion
+
+            var appId = GetParameter(args, "-app", ContentDownloader.INVALID_APP_ID);
+            if (appId == ContentDownloader.INVALID_APP_ID)
+            {
+                Console.WriteLine("Error: -app not specified!");
+                return 1;
+            }
+
+            var pubFile = GetParameter(args, "-pubfile", ContentDownloader.INVALID_MANIFEST_ID);
+            var ugcId = GetParameter(args, "-ugc", ContentDownloader.INVALID_MANIFEST_ID);
+            if (pubFile != ContentDownloader.INVALID_MANIFEST_ID)
+            {
+                #region Pubfile Downloading
+
+                PrintUnconsumedArgs(args);
+
+                if (InitializeSteam(username, password))
+                {
+                    try
+                    {
+                        await ContentDownloader.DownloadPubfileAsync(appId, pubFile).ConfigureAwait(false);
+                    }
+                    catch (Exception ex) when (
+                        ex is ContentDownloaderException
+                        || ex is OperationCanceledException)
+                    {
+                        Console.WriteLine(ex.Message);
+                        return 1;
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine("Download failed to due to an unhandled exception: {0}", e.Message);
+                        throw;
+                    }
+                    finally
+                    {
+                        ContentDownloader.ShutdownSteam3();
+                    }
+                }
+                else
+                {
+                    Console.WriteLine("Error: InitializeSteam failed");
+                    return 1;
+                }
+
+                #endregion
+            }
+            else if (ugcId != ContentDownloader.INVALID_MANIFEST_ID)
+            {
+                #region UGC Downloading
+
+                PrintUnconsumedArgs(args);
+
+                if (InitializeSteam(username, password))
+                {
+                    try
+                    {
+                        await ContentDownloader.DownloadUGCAsync(appId, ugcId).ConfigureAwait(false);
+                    }
+                    catch (Exception ex) when (
+                        ex is ContentDownloaderException
+                        || ex is OperationCanceledException)
+                    {
+                        Console.WriteLine(ex.Message);
+                        return 1;
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine("Download failed to due to an unhandled exception: {0}", e.Message);
+                        throw;
+                    }
+                    finally
+                    {
+                        ContentDownloader.ShutdownSteam3();
+                    }
+                }
+                else
+                {
+                    Console.WriteLine("Error: InitializeSteam failed");
+                    return 1;
+                }
+
+                #endregion
+            }
+            else
+            {
+                #region App downloading
+
+                var branch = GetParameter<string>(args, "-branch") ?? GetParameter<string>(args, "-beta") ?? ContentDownloader.DEFAULT_BRANCH;
+                ContentDownloader.Config.BetaPassword = GetParameter<string>(args, "-branchpassword") ?? GetParameter<string>(args, "-betapassword");
+
+                if (!string.IsNullOrEmpty(ContentDownloader.Config.BetaPassword) && string.IsNullOrEmpty(branch))
+                {
+                    Console.WriteLine("Error: Cannot specify -branchpassword when -branch is not specified.");
+                    return 1;
+                }
+
+                ContentDownloader.Config.DownloadAllPlatforms = HasParameter(args, "-all-platforms");
+
+                var os = GetParameter<string>(args, "-os");
+
+                if (ContentDownloader.Config.DownloadAllPlatforms && !string.IsNullOrEmpty(os))
+                {
+                    Console.WriteLine("Error: Cannot specify -os when -all-platforms is specified.");
+                    return 1;
+                }
+
+                ContentDownloader.Config.DownloadAllArchs = HasParameter(args, "-all-archs");
+
+                var arch = GetParameter<string>(args, "-osarch");
+
+                if (ContentDownloader.Config.DownloadAllArchs && !string.IsNullOrEmpty(arch))
+                {
+                    Console.WriteLine("Error: Cannot specify -osarch when -all-archs is specified.");
+                    return 1;
+                }
+
+                ContentDownloader.Config.DownloadAllLanguages = HasParameter(args, "-all-languages");
+                var language = GetParameter<string>(args, "-language");
+
+                if (ContentDownloader.Config.DownloadAllLanguages && !string.IsNullOrEmpty(language))
+                {
+                    Console.WriteLine("Error: Cannot specify -language when -all-languages is specified.");
+                    return 1;
+                }
+
+                var lv = HasParameter(args, "-lowviolence");
+
+                var depotManifestIds = new List<(uint, ulong)>();
+                var isUGC = false;
+
+                var depotIdList = GetParameterList<uint>(args, "-depot");
+                var manifestIdList = GetParameterList<ulong>(args, "-manifest");
+                if (manifestIdList.Count > 0)
+                {
+                    if (depotIdList.Count != manifestIdList.Count)
+                    {
+                        Console.WriteLine("Error: -manifest requires one id for every -depot specified");
+                        return 1;
+                    }
+
+                    var zippedDepotManifest = depotIdList.Zip(manifestIdList, (depotId, manifestId) => (depotId, manifestId));
+                    depotManifestIds.AddRange(zippedDepotManifest);
+                }
+                else
+                {
+                    depotManifestIds.AddRange(depotIdList.Select(depotId => (depotId, ContentDownloader.INVALID_MANIFEST_ID)));
+                }
+
+                PrintUnconsumedArgs(args);
+
+                if (InitializeSteam(username, password))
+                {
+                    try
+                    {
+                        await ContentDownloader.DownloadAppAsync(appId, depotManifestIds, branch, os, arch, language, lv, isUGC).ConfigureAwait(false);
+                    }
+                    catch (Exception ex) when (
+                        ex is ContentDownloaderException
+                        || ex is OperationCanceledException)
+                    {
+                        Console.WriteLine(ex.Message);
+                        return 1;
+                    }
+                    catch (Exception e)
+                    {
+                        Console.WriteLine("Download failed to due to an unhandled exception: {0}", e.Message);
+                        throw;
+                    }
+                    finally
+                    {
+                        ContentDownloader.ShutdownSteam3();
+                    }
+                }
+                else
+                {
+                    Console.WriteLine("Error: InitializeSteam failed");
+                    return 1;
+                }
+
+                #endregion
+            }
+
+            return 0;
+        }
+
+        static bool InitializeSteam(string username, string password)
+        {
+            if (!ContentDownloader.Config.UseQrCode)
+            {
+                if (username != null && password == null && (!ContentDownloader.Config.RememberPassword || !AccountSettingsStore.Instance.LoginTokens.ContainsKey(username)))
+                {
+                    if (AccountSettingsStore.Instance.LoginTokens.ContainsKey(username))
+                    {
+                        Console.WriteLine($"Account \"{username}\" has stored credentials. Did you forget to specify -remember-password?");
+                    }
+
+                    do
+                    {
+                        Console.Write("Enter account password for \"{0}\": ", username);
+                        if (Console.IsInputRedirected)
+                        {
+                            password = Console.ReadLine();
+                        }
+                        else
+                        {
+                            // Avoid console echoing of password
+                            password = Util.ReadPassword();
+                        }
+
+                        Console.WriteLine();
+                    } while (string.Empty == password);
+                }
+                else if (username == null)
+                {
+                    Console.WriteLine("No username given. Using anonymous account with dedicated server subscription.");
+                }
+            }
+
+            if (!string.IsNullOrEmpty(password))
+            {
+                const int MAX_PASSWORD_SIZE = 64;
+
+                if (password.Length > MAX_PASSWORD_SIZE)
+                {
+                    Console.Error.WriteLine($"Warning: Password is longer than {MAX_PASSWORD_SIZE} characters, which is not supported by Steam.");
+                }
+
+                if (!password.All(char.IsAscii))
+                {
+                    Console.Error.WriteLine("Warning: Password contains non-ASCII characters, which is not supported by Steam.");
+                }
+            }
+
+            return ContentDownloader.InitializeSteam3(username, password);
+        }
+
+        static int IndexOfParam(string[] args, string param)
+        {
+            for (var x = 0; x < args.Length; ++x)
+            {
+                if (args[x].Equals(param, StringComparison.OrdinalIgnoreCase))
+                {
+                    consumedArgs[x] = true;
+                    return x;
+                }
+            }
+
+            return -1;
+        }
+
+        static bool HasParameter(string[] args, string param)
+        {
+            return IndexOfParam(args, param) > -1;
+        }
+
+        static T GetParameter<T>(string[] args, string param, T defaultValue = default)
+        {
+            var index = IndexOfParam(args, param);
+
+            if (index == -1 || index == (args.Length - 1))
+                return defaultValue;
+
+            var strParam = args[index + 1];
+
+            var converter = TypeDescriptor.GetConverter(typeof(T));
+            if (converter != null)
+            {
+                consumedArgs[index + 1] = true;
+                return (T)converter.ConvertFromString(strParam);
+            }
+
+            return default;
+        }
+
+        static List<T> GetParameterList<T>(string[] args, string param)
+        {
+            var list = new List<T>();
+            var index = IndexOfParam(args, param);
+
+            if (index == -1 || index == (args.Length - 1))
+                return list;
+
+            index++;
+
+            while (index < args.Length)
+            {
+                var strParam = args[index];
+
+                if (strParam[0] == '-') break;
+
+                var converter = TypeDescriptor.GetConverter(typeof(T));
+                if (converter != null)
+                {
+                    consumedArgs[index] = true;
+                    list.Add((T)converter.ConvertFromString(strParam));
+                }
+
+                index++;
+            }
+
+            return list;
+        }
+
+        static void PrintUnconsumedArgs(string[] args)
+        {
+            var printError = false;
+
+            for (var index = 0; index < consumedArgs.Length; index++)
+            {
+                if (!consumedArgs[index])
+                {
+                    printError = true;
+                    Console.Error.WriteLine($"Argument #{index + 1} {args[index]} was not used.");
+                }
+            }
+
+            if (printError)
+            {
+                Console.Error.WriteLine("Make sure you specified the arguments correctly. Check --help for correct arguments.");
+                Console.Error.WriteLine();
+            }
+        }
+
+        static void PrintUsage()
+        {
+            // Do not use tabs to align parameters here because tab size may differ
+            Console.WriteLine();
+            Console.WriteLine("Usage: downloading one or all depots for an app:");
+            Console.WriteLine("       depotdownloader -app <id> [-depot <id> [-manifest <id>]]");
+            Console.WriteLine("                       [-username <username> [-password <password>]] [other options]");
+            Console.WriteLine();
+            Console.WriteLine("Usage: downloading a workshop item using pubfile id");
+            Console.WriteLine("       depotdownloader -app <id> -pubfile <id> [-username <username> [-password <password>]]");
+            Console.WriteLine("Usage: downloading a workshop item using ugc id");
+            Console.WriteLine("       depotdownloader -app <id> -ugc <id> [-username <username> [-password <password>]]");
+            Console.WriteLine();
+            Console.WriteLine("Parameters:");
+            Console.WriteLine("  -app <#>                 - the AppID to download.");
+            Console.WriteLine("  -depot <#>               - the DepotID to download.");
+            Console.WriteLine("  -manifest <id>           - manifest id of content to download (requires -depot, default: current for branch).");
+            Console.WriteLine($"  -branch <branchname>    - download from specified branch if available (default: {ContentDownloader.DEFAULT_BRANCH}).");
+            Console.WriteLine("  -branchpassword <pass>   - branch password if applicable.");
+            Console.WriteLine("  -all-platforms           - downloads all platform-specific depots when -app is used.");
+            Console.WriteLine("  -all-archs               - download all architecture-specific depots when -app is used.");
+            Console.WriteLine("  -os <os>                 - the operating system for which to download the game (windows, macos or linux, default: OS the program is currently running on)");
+            Console.WriteLine("  -osarch <arch>           - the architecture for which to download the game (32 or 64, default: the host's architecture)");
+            Console.WriteLine("  -all-languages           - download all language-specific depots when -app is used.");
+            Console.WriteLine("  -language <lang>         - the language for which to download the game (default: english)");
+            Console.WriteLine("  -lowviolence             - download low violence depots when -app is used.");
+            Console.WriteLine();
+            Console.WriteLine("  -ugc <#>                 - the UGC ID to download.");
+            Console.WriteLine("  -pubfile <#>             - the PublishedFileId to download. (Will automatically resolve to UGC id)");
+            Console.WriteLine();
+            Console.WriteLine("  -username <user>         - the username of the account to login to for restricted content.");
+            Console.WriteLine("  -password <pass>         - the password of the account to login to for restricted content.");
+            Console.WriteLine("  -remember-password       - if set, remember the password for subsequent logins of this user.");
+            Console.WriteLine("                             use -username <username> -remember-password as login credentials.");
+            Console.WriteLine("  -qr                      - display a login QR code to be scanned with the Steam mobile app");
+            Console.WriteLine("  -no-mobile               - prefer entering a 2FA code instead of prompting to accept in the Steam mobile app");
+            Console.WriteLine();
+            Console.WriteLine("  -dir <installdir>        - the directory in which to place downloaded files.");
+            Console.WriteLine("  -filelist <file.txt>     - the name of a local file that contains a list of files to download (from the manifest).");
+            Console.WriteLine("                             prefix file path with `regex:` if you want to match with regex. each file path should be on their own line.");
+            Console.WriteLine();
+            Console.WriteLine("  -validate                - include checksum verification of files already downloaded");
+            Console.WriteLine("  -manifest-only           - downloads a human readable manifest for any depots that would be downloaded.");
+            Console.WriteLine("  -cellid <#>              - the overridden CellID of the content server to download from.");
+            Console.WriteLine("  -max-downloads <#>       - maximum number of chunks to download concurrently. (default: 8).");
+            Console.WriteLine("  -loginid <#>             - a unique 32-bit integer Steam LogonID in decimal, required if running multiple instances of DepotDownloader concurrently.");
+            Console.WriteLine("  -use-lancache            - forces downloads over the local network via a Lancache instance.");
+            Console.WriteLine();
+            Console.WriteLine("  -debug                   - enable verbose debug logging.");
+            Console.WriteLine("  -V or --version          - print version and runtime.");
+        }
+
+        static void PrintVersion(bool printExtra = false)
+        {
+            var version = typeof(Program).Assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>().InformationalVersion;
+            Console.WriteLine($"DepotDownloader v{version}");
+
+            if (!printExtra)
+            {
+                return;
+            }
+
+            Console.WriteLine($"Runtime: {RuntimeInformation.FrameworkDescription} on {RuntimeInformation.OSDescription}");
+        }
+    }
+}

DepotDownloader/Properties/AssemblyInfo.cs

@@ -1,34 +0,0 @@
-using System.Reflection;
-using System.Runtime.InteropServices;
-
-// General Information about an assembly is controlled through the following 
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-[assembly: AssemblyTitle( "DepotDownloader" )]
-[assembly: AssemblyDescription("Steam Downloading Utility")]
-[assembly: AssemblyConfiguration( "" )]
-[assembly: AssemblyCompany("SteamRE Team")]
-[assembly: AssemblyProduct( "DepotDownloader" )]
-[assembly: AssemblyCopyright("Copyright © SteamRE Team 2017")]
-[assembly: AssemblyTrademark( "" )]
-[assembly: AssemblyCulture( "" )]
-
-// Setting ComVisible to false makes the types in this assembly not visible 
-// to COM components.  If you need to access a type in this assembly from 
-// COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible( false )]
-
-// The following GUID is for the ID of the typelib if this project is exposed to COM
-[assembly: Guid( "df2ab32a-923c-46e3-a1b4-c901ee92ec94" )]
-
-// Version information for an assembly consists of the following four values:
-//
-//      Major Version
-//      Minor Version 
-//      Build Number
-//      Revision
-//
-// You can specify all the values or you can default the Build and Revision Numbers 
-// by using the '*' as shown below:
-// [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("2.3.0.0")]

DepotDownloader/Properties/launchSettings.json

@@ -1,7 +0,0 @@
-{
-  "profiles": {
-    "DepotDownloader": {
-      "commandName": "Project"
-    }
-  }
-}

DepotDownloader/ProtoManifest.cs

@@ -1,34 +1,40 @@
-using System.Collections.Generic;
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System;
+using System.Collections.Generic;
 using System.IO;
 using System.IO.Compression;
-
+using System.Security.Cryptography;
+using System.Text;
 using ProtoBuf;
 using SteamKit2;
 
 namespace DepotDownloader
 {
-    [ProtoContract()]
+    [ProtoContract]
     class ProtoManifest
     {
         // Proto ctor
         private ProtoManifest()
         {
-            Files = new List<FileData>();
+            Files = [];
         }
 
         public ProtoManifest(DepotManifest sourceManifest, ulong id) : this()
         {
             sourceManifest.Files.ForEach(f => Files.Add(new FileData(f)));
             ID = id;
+            CreationTime = sourceManifest.CreationTime;
         }
 
-        [ProtoContract()]
+        [ProtoContract]
         public class FileData
         {
             // Proto ctor
             private FileData()
             {
-                Chunks = new List<ChunkData>();
+                Chunks = [];
             }
 
             public FileData(DepotManifest.FileData sourceData) : this()
@@ -74,7 +80,7 @@ namespace DepotDownloader
             public ChunkData(DepotManifest.ChunkData sourceChunk)
             {
                 ChunkID = sourceChunk.ChunkID;
-                Checksum = sourceChunk.Checksum;
+                Checksum = BitConverter.GetBytes(sourceChunk.Checksum);
                 Offset = sourceChunk.Offset;
                 CompressedLength = sourceChunk.CompressedLength;
                 UncompressedLength = sourceChunk.UncompressedLength;
@@ -117,6 +123,9 @@ namespace DepotDownloader
         [ProtoMember(2)]
         public ulong ID { get; private set; }
 
+        [ProtoMember(3)]
+        public DateTime CreationTime { get; private set; }
+
         public static ProtoManifest LoadFromFile(string filename, out byte[] checksum)
         {
             if (!File.Exists(filename))
@@ -125,34 +134,63 @@ namespace DepotDownloader
                 return null;
             }
 
-            using (MemoryStream ms = new MemoryStream())
-            {
-                using (FileStream fs = File.Open(filename, FileMode.Open))
-                using (DeflateStream ds = new DeflateStream(fs, CompressionMode.Decompress))
-                    ds.CopyTo(ms);
+            using var ms = new MemoryStream();
+            using (var fs = File.Open(filename, FileMode.Open))
+            using (var ds = new DeflateStream(fs, CompressionMode.Decompress))
+                ds.CopyTo(ms);
 
-                checksum = Util.SHAHash(ms.ToArray());
+            checksum = SHA1.HashData(ms.ToArray());
 
-                ms.Seek(0, SeekOrigin.Begin);
-                return ProtoBuf.Serializer.Deserialize<ProtoManifest>(ms);
-            }
+            ms.Seek(0, SeekOrigin.Begin);
+            return Serializer.Deserialize<ProtoManifest>(ms);
         }
 
         public void SaveToFile(string filename, out byte[] checksum)
         {
-            
-            using (MemoryStream ms = new MemoryStream())
+            using var ms = new MemoryStream();
+            Serializer.Serialize(ms, this);
+
+            checksum = SHA1.HashData(ms.ToArray());
+
+            ms.Seek(0, SeekOrigin.Begin);
+
+            using var fs = File.Open(filename, FileMode.Create);
+            using var ds = new DeflateStream(fs, CompressionMode.Compress);
+            ms.CopyTo(ds);
+        }
+
+        public DepotManifest ConvertToSteamManifest(uint depotId)
+        {
+            ulong uncompressedSize = 0, compressedSize = 0;
+            var newManifest = new DepotManifest();
+            newManifest.Files = new List<DepotManifest.FileData>(Files.Count);
+
+            foreach (var file in Files)
             {
-                ProtoBuf.Serializer.Serialize<ProtoManifest>(ms, this);
+                var fileNameHash = SHA1.HashData(Encoding.UTF8.GetBytes(file.FileName.Replace('/', '\\').ToLowerInvariant()));
+                var newFile = new DepotManifest.FileData(file.FileName, fileNameHash, file.Flags, file.TotalSize, file.FileHash, null, false, file.Chunks.Count);
 
-                checksum = Util.SHAHash(ms.ToArray());
+                foreach (var chunk in file.Chunks)
+                {
+                    var newChunk = new DepotManifest.ChunkData(chunk.ChunkID, BitConverter.ToUInt32(chunk.Checksum, 0), chunk.Offset, chunk.CompressedLength, chunk.UncompressedLength);
+                    newFile.Chunks.Add(newChunk);
 
-                ms.Seek(0, SeekOrigin.Begin);
+                    uncompressedSize += chunk.UncompressedLength;
+                    compressedSize += chunk.CompressedLength;
+                }
 
-                using (FileStream fs = File.Open(filename, FileMode.Create))
-                using (DeflateStream ds = new DeflateStream(fs, CompressionMode.Compress))
-                    ms.CopyTo(ds);
+                newManifest.Files.Add(newFile);
             }
+
+            newManifest.FilenamesEncrypted = false;
+            newManifest.DepotID = depotId;
+            newManifest.ManifestGID = ID;
+            newManifest.CreationTime = CreationTime;
+            newManifest.TotalUncompressedSize = uncompressedSize;
+            newManifest.TotalCompressedSize = compressedSize;
+            newManifest.EncryptedCRC = 0;
+
+            return newManifest;
         }
     }
 }

DepotDownloader/Util.cs

@@ -1,131 +1,239 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Runtime.InteropServices;
-using System.Security.Cryptography;
-using System.Text;
-
-namespace DepotDownloader
-{
-    static class Util
-    {
-        public static string GetSteamOS()
-        {
-            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-            {
-                return "windows";
-            }
-            else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-            {
-                return "macos";
-            }
-            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
-            {
-                return "linux";
-            }
-
-            return "unknown";
-        }
-
-        public static string ReadPassword()
-        {
-            ConsoleKeyInfo keyInfo;
-            StringBuilder password = new StringBuilder();
-
-            do 
-            {
-                keyInfo = Console.ReadKey( true );
-
-                if ( keyInfo.Key == ConsoleKey.Backspace )
-                {
-                    if ( password.Length > 0 )
-                        password.Remove( password.Length - 1, 1 );
-                    continue;
-                }
-
-                /* Printable ASCII characters only */
-                char c = keyInfo.KeyChar;
-                if ( c >= ' ' && c <= '~' )
-                    password.Append( c );
-            } while ( keyInfo.Key != ConsoleKey.Enter );
-
-            return password.ToString();
-        }
-
-        // Validate a file against Steam3 Chunk data
-        public static List<ProtoManifest.ChunkData> ValidateSteam3FileChecksums(FileStream fs, ProtoManifest.ChunkData[] chunkdata)
-        {
-            var neededChunks = new List<ProtoManifest.ChunkData>();
-            int read;
-
-            foreach (var data in chunkdata)
-            {
-                byte[] chunk = new byte[data.UncompressedLength];
-                fs.Seek((long)data.Offset, SeekOrigin.Begin);
-                read = fs.Read(chunk, 0, (int)data.UncompressedLength);
-
-                byte[] tempchunk;
-                if (read < data.UncompressedLength)
-                {
-                    tempchunk = new byte[read];
-                    Array.Copy(chunk, 0, tempchunk, 0, read);
-                }
-                else
-                {
-                    tempchunk = chunk;
-                }
-
-                byte[] adler = AdlerHash(tempchunk);
-                if (!adler.SequenceEqual(data.Checksum))
-                {
-                    neededChunks.Add(data);
-                }
-            }
-
-            return neededChunks;
-        }
-
-        public static byte[] AdlerHash(byte[] input)
-        {
-            uint a = 0, b = 0;
-            for (int i = 0; i < input.Length; i++)
-            {
-                a = (a + input[i]) % 65521;
-                b = (b + a) % 65521;
-            }
-            return BitConverter.GetBytes(a | (b << 16));
-        }
-
-        public static byte[] SHAHash( byte[] input )
-        {
-            using (var sha = SHA1.Create())
-            {
-                var output = sha.ComputeHash( input );
-
-                return output;
-            }
-        }
-
-        public static byte[] DecodeHexString( string hex )
-        {
-            if ( hex == null )
-                return null;
-
-            int chars = hex.Length;
-            byte[] bytes = new byte[ chars / 2 ];
-
-            for ( int i = 0 ; i < chars ; i += 2 )
-                bytes[ i / 2 ] = Convert.ToByte( hex.Substring( i, 2 ), 16 );
-
-            return bytes;
-        }
-
-        public static string EncodeHexString( byte[] input )
-        {
-            return input.Aggregate( new StringBuilder(),
-                ( sb, v ) => sb.Append( v.ToString( "x2" ) )
-                ).ToString();
-        }
-    }
-}
+// This file is subject to the terms and conditions defined
+// in file 'LICENSE', which is part of this source code package.
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+using SteamKit2;
+
+namespace DepotDownloader
+{
+    static class Util
+    {
+        public static string GetSteamOS()
+        {
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                return "windows";
+            }
+
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+            {
+                return "macos";
+            }
+
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+            {
+                return "linux";
+            }
+
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.FreeBSD))
+            {
+                // Return linux as freebsd steam client doesn't exist yet
+                return "linux";
+            }
+
+            return "unknown";
+        }
+
+        public static string GetSteamArch()
+        {
+            return Environment.Is64BitOperatingSystem ? "64" : "32";
+        }
+
+        public static string ReadPassword()
+        {
+            ConsoleKeyInfo keyInfo;
+            var password = new StringBuilder();
+
+            do
+            {
+                keyInfo = Console.ReadKey(true);
+
+                if (keyInfo.Key == ConsoleKey.Backspace)
+                {
+                    if (password.Length > 0)
+                    {
+                        password.Remove(password.Length - 1, 1);
+                        Console.Write("\b \b");
+                    }
+
+                    continue;
+                }
+
+                /* Printable ASCII characters only */
+                var c = keyInfo.KeyChar;
+                if (c >= ' ' && c <= '~')
+                {
+                    password.Append(c);
+                    Console.Write('*');
+                }
+            } while (keyInfo.Key != ConsoleKey.Enter);
+
+            return password.ToString();
+        }
+
+        // Validate a file against Steam3 Chunk data
+        public static List<DepotManifest.ChunkData> ValidateSteam3FileChecksums(FileStream fs, DepotManifest.ChunkData[] chunkdata)
+        {
+            var neededChunks = new List<DepotManifest.ChunkData>();
+
+            foreach (var data in chunkdata)
+            {
+                fs.Seek((long)data.Offset, SeekOrigin.Begin);
+
+                var adler = AdlerHash(fs, (int)data.UncompressedLength);
+                if (!adler.SequenceEqual(BitConverter.GetBytes(data.Checksum)))
+                {
+                    neededChunks.Add(data);
+                }
+            }
+
+            return neededChunks;
+        }
+
+        public static byte[] AdlerHash(Stream stream, int length)
+        {
+            uint a = 0, b = 0;
+            for (var i = 0; i < length; i++)
+            {
+                var c = (uint)stream.ReadByte();
+
+                a = (a + c) % 65521;
+                b = (b + a) % 65521;
+            }
+
+            return BitConverter.GetBytes(a | (b << 16));
+        }
+
+        public static byte[] FileSHAHash(string filename)
+        {
+            using (var fs = File.Open(filename, FileMode.Open))
+            using (var sha = SHA1.Create())
+            {
+                var output = sha.ComputeHash(fs);
+
+                return output;
+            }
+        }
+
+        public static DepotManifest LoadManifestFromFile(string directory, uint depotId, ulong manifestId, bool badHashWarning)
+        {
+            // Try loading Steam format manifest first.
+            var filename = Path.Combine(directory, string.Format("{0}_{1}.manifest", depotId, manifestId));
+
+            if (File.Exists(filename))
+            {
+                byte[] expectedChecksum;
+
+                try
+                {
+                    expectedChecksum = File.ReadAllBytes(filename + ".sha");
+                }
+                catch (IOException)
+                {
+                    expectedChecksum = null;
+                }
+
+                var currentChecksum = FileSHAHash(filename);
+
+                if (expectedChecksum != null && expectedChecksum.SequenceEqual(currentChecksum))
+                {
+                    return DepotManifest.LoadFromFile(filename);
+                }
+                else if (badHashWarning)
+                {
+                    Console.WriteLine("Manifest {0} on disk did not match the expected checksum.", manifestId);
+                }
+            }
+
+            // Try converting legacy manifest format.
+            filename = Path.Combine(directory, string.Format("{0}_{1}.bin", depotId, manifestId));
+
+            if (File.Exists(filename))
+            {
+                byte[] expectedChecksum;
+
+                try
+                {
+                    expectedChecksum = File.ReadAllBytes(filename + ".sha");
+                }
+                catch (IOException)
+                {
+                    expectedChecksum = null;
+                }
+
+                byte[] currentChecksum;
+                var oldManifest = ProtoManifest.LoadFromFile(filename, out currentChecksum);
+
+                if (oldManifest != null && (expectedChecksum == null || !expectedChecksum.SequenceEqual(currentChecksum)))
+                {
+                    oldManifest = null;
+
+                    if (badHashWarning)
+                    {
+                        Console.WriteLine("Manifest {0} on disk did not match the expected checksum.", manifestId);
+                    }
+                }
+
+                if (oldManifest != null)
+                {
+                    return oldManifest.ConvertToSteamManifest(depotId);
+                }
+            }
+
+            return null;
+        }
+
+        public static bool SaveManifestToFile(string directory, DepotManifest manifest)
+        {
+            try
+            {
+                var filename = Path.Combine(directory, string.Format("{0}_{1}.manifest", manifest.DepotID, manifest.ManifestGID));
+                manifest.SaveToFile(filename);
+                File.WriteAllBytes(filename + ".sha", FileSHAHash(filename));
+                return true; // If serialization completes without throwing an exception, return true
+            }
+            catch (Exception)
+            {
+                return false; // Return false if an error occurs
+            }
+        }
+
+        public static byte[] DecodeHexString(string hex)
+        {
+            if (hex == null)
+                return null;
+
+            var chars = hex.Length;
+            var bytes = new byte[chars / 2];
+
+            for (var i = 0; i < chars; i += 2)
+                bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);
+
+            return bytes;
+        }
+
+        /// <summary>
+        /// Decrypts using AES/ECB/PKCS7
+        /// </summary>
+        public static byte[] SymmetricDecryptECB(byte[] input, byte[] key)
+        {
+            using var aes = Aes.Create();
+            aes.BlockSize = 128;
+            aes.KeySize = 256;
+            aes.Mode = CipherMode.ECB;
+            aes.Padding = PaddingMode.PKCS7;
+
+            using var aesTransform = aes.CreateDecryptor(key, null);
+            var output = aesTransform.TransformFinalBlock(input, 0, input.Length);
+
+            return output;
+        }
+    }
+}

DepotDownloader/app.config

@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-  <startup>
-    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5"/>
-  </startup>
-  <runtime>
-    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
-      <dependentAssembly>
-        <assemblyIdentity name="protobuf-net" publicKeyToken="257b51d87d2e4d67" culture="neutral"/>
-        <bindingRedirect oldVersion="0.0.0.0-2.0.0.640" newVersion="2.0.0.640"/>
-      </dependentAssembly>
-    </assemblyBinding>
-  </runtime>
-</configuration>

DepotDownloader/runtimeconfig.template.json

@@ -1,3 +0,0 @@
- {
-   "rollForwardOnNoCandidateFx": 2
- }

Icon/DepotDownloader.svg

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg width="100%" height="100%" viewBox="0 0 65 65" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve" xmlns:serif="http://www.serif.com/" style="fill-rule:evenodd;clip-rule:evenodd;stroke-linejoin:round;stroke-miterlimit:2;">
+    <g id="B" transform="matrix(1,0,0,1,0.5,0.5)">
+        <g>
+            <path d="M1.305,41.202C5.259,54.386 17.488,64 31.959,64C49.632,64 63.959,49.673 63.959,32C63.959,14.327 49.632,0 31.959,0C15.001,0 1.124,13.193 0.028,29.874C2.102,33.351 2.907,35.502 1.303,41.202L1.305,41.202Z" style="fill:rgb(56,61,72);fill-rule:nonzero;"/>
+            <g transform="matrix(-0.984183,-1.19698e-16,9.80712e-17,-0.795301,95.4776,96.4352)">
+                <g id="Arrow">
+                    <path d="M45.613,41.896C45.811,41.658 46.125,41.658 46.322,41.896C48.069,44.002 55.776,53.297 58.421,56.487C58.569,56.666 58.615,56.938 58.537,57.174C58.459,57.411 58.273,57.566 58.067,57.566C55.616,57.566 50.417,57.566 50.417,57.566L50.417,80.833L41.519,90.628L41.519,57.566L33.869,57.566C33.662,57.566 33.476,57.411 33.399,57.174C33.321,56.938 33.367,56.666 33.515,56.487C36.16,53.297 43.867,44.002 45.613,41.896Z" style="fill:white;"/>
+                    <path d="M44.904,40.996C43.158,43.102 35.45,52.397 32.805,55.587C32.361,56.122 32.224,56.937 32.457,57.648C32.691,58.359 33.249,58.824 33.869,58.824L40.502,58.824C40.502,58.824 40.502,90.628 40.502,90.628L42.194,91.567L51.433,81.398L51.433,58.824C51.433,58.824 58.067,58.824 58.067,58.824C58.687,58.824 59.245,58.359 59.478,57.648C59.712,56.937 59.574,56.122 59.13,55.587C56.485,52.397 48.778,43.102 47.032,40.996C46.44,40.282 45.496,40.282 44.904,40.996L44.904,40.996ZM45.613,41.896C45.811,41.658 46.125,41.658 46.322,41.896C48.069,44.002 55.776,53.297 58.421,56.487C58.569,56.666 58.615,56.938 58.537,57.174C58.459,57.411 58.273,57.566 58.067,57.566C55.616,57.566 50.417,57.566 50.417,57.566L50.417,80.833L41.519,90.628L41.519,57.566L33.869,57.566C33.662,57.566 33.476,57.411 33.399,57.174C33.321,56.938 33.367,56.666 33.515,56.487C36.16,53.297 43.867,44.002 45.613,41.896Z" style="fill:rgb(56,61,72);"/>
+                </g>
+            </g>
+            <path id="Steam" d="M30.31,23.985L30.313,24.143L22.483,35.518C21.215,35.46 19.943,35.683 18.735,36.18C18.209,36.394 17.707,36.662 17.237,36.98L0.042,29.893C0.042,29.893 -0.356,36.439 1.302,41.317L13.458,46.333C14.058,49.061 15.938,51.453 18.7,52.603C23.194,54.47 28.43,52.313 30.303,47.821C30.786,46.664 31.019,45.418 30.987,44.165L42.18,36.16L42.455,36.165C49.16,36.165 54.61,30.699 54.61,23.985C54.61,17.271 49.17,11.825 42.455,11.811C35.753,11.811 30.3,17.271 30.3,23.985L30.31,23.985ZM28.43,47.035C26.976,50.535 22.964,52.182 19.477,50.729C17.93,50.079 16.675,48.882 15.953,47.367L19.91,49.007C20.524,49.262 21.182,49.394 21.847,49.394C23.879,49.394 25.721,48.165 26.501,46.288C27.565,43.733 26.34,40.754 23.786,39.687L19.686,37.992C21.264,37.392 23.058,37.372 24.736,38.069C26.436,38.772 27.736,40.096 28.432,41.789C29.128,43.482 29.124,45.349 28.422,47.035M42.466,32.1C38.022,32.088 34.372,28.431 34.368,23.987C34.373,19.544 38.023,15.888 42.466,15.876C46.91,15.887 50.561,19.543 50.566,23.987C50.562,28.431 46.91,32.089 42.466,32.1M36.398,23.974C36.395,20.635 39.139,17.884 42.478,17.879C45.833,17.879 48.562,20.609 48.562,23.974C48.564,27.314 45.818,30.064 42.478,30.067C39.139,30.062 36.395,27.313 36.397,23.974L36.398,23.974Z" style="fill:rgb(175,212,255);fill-rule:nonzero;"/>
+        </g>
+    </g>
+</svg>

README.md

@@ -1,39 +1,131 @@
 DepotDownloader
 ===============
 
-Steam depot downloader utilizing the SteamKit2 library. Supports .NET Core 2.0
+Steam depot downloader utilizing the SteamKit2 library. Supports .NET 8.0
 
+This program must be run from a console, it has no GUI.
+
+## Installation
+
+### Directly from GitHub
+
+Download a binary from [the releases page](https://github.com/SteamRE/DepotDownloader/releases/latest).
+
+### via Windows Package Manager CLI (aka winget)
+
+On Windows, [winget](https://github.com/microsoft/winget-cli) users can download and install
+the latest Terminal release by installing the `SteamRE.DepotDownloader`
+package:
+
+```powershell
+winget install --exact --id SteamRE.DepotDownloader
 ```
-Usage - downloading one or all depots for an app:
-	dotnet DepotDownloader.dll -app <id> [-depot <id> [-manifest <id>] | [-ugc <id>]]
-		[-username <username> [-password <password>]] [other options]
-
-Usage - downloading a Workshop item published via SteamUGC
-	dotnet DepotDownloader.dll -pubfile <id> [-username <username> [-password <password>]]
-
-Parameters:
-	-app <#>				- the AppID to download.
-	-depot <#>				- the DepotID to download.
-	-manifest <id>			- manifest id of content to download (requires -depot, default: current for branch).
-	-ugc <#>				- the UGC ID to download.
-	-beta <branchname>		- download from specified branch if available (default: Public).
-	-betapassword <pass>	- branch password if applicable.
-	-all-platforms			- downloads all platform-specific depots when -app is used.
-	-os <os>				- the operating system for which to download the game (windows, macos or linux, default: OS the program is currently running on)
-
-	-pubfile <#>			- the PublishedFileId to download. (Will automatically resolve to UGC id)
-
-	-username <user>		- the username of the account to login to for restricted content.
-	-password <pass>		- the password of the account to login to for restricted content.
-	-remember-password		- if set, remember the password for subsequent logins of this user.
-
-	-dir <installdir>		- the directory in which to place downloaded files.
-	-filelist <file.txt>	- a list of files to download (from the manifest). Can optionally use regex to download only certain files.
-	-validate				- Include checksum verification of files already downloaded
-
-	-manifest-only			- downloads a human readable manifest for any depots that would be downloaded.
-	-cellid <#>				- the overridden CellID of the content server to download from.
-	-max-servers <#>		- maximum number of content servers to use. (default: 8).
-	-max-downloads <#>		- maximum number of chunks to download concurrently. (default: 4).
-	-loginid <#>            - a unique 32-bit integer Steam LogonID in decimal, required if running multiple instances of DepotDownloader concurrently.
+
+### via Homebrew
+
+On macOS, [Homebrew](https://brew.sh) users can download and install that latest release by running the following commands:
+
+```shell
+brew tap steamre/tools
+brew install depotdownloader
 ```
+
+## Usage
+
+### Downloading one or all depots for an app
+```powershell
+./DepotDownloader -app <id> [-depot <id> [-manifest <id>]]
+                 [-username <username> [-password <password>]] [other options]
+```
+
+For example: `./DepotDownloader -app 730 -depot 731 -manifest 7617088375292372759`
+
+By default it will use anonymous account ([view which apps are available on it here](https://steamdb.info/sub/17906/)).
+
+To use your account, specify the `-username <username>` parameter. Password will be asked interactively if you do
+not use specify the `-password` parameter.
+
+### Downloading a workshop item using pubfile id
+```powershell
+./DepotDownloader -app <id> -pubfile <id> [-username <username> [-password <password>]]
+```
+
+For example: `./DepotDownloader -app 730 -pubfile 1885082371`
+
+### Downloading a workshop item using ugc id
+```powershell
+./DepotDownloader -app <id> -ugc <id> [-username <username> [-password <password>]]
+```
+
+For example: `./DepotDownloader -app 730 -ugc 770604181014286929`
+
+## Parameters
+
+#### Authentication
+
+Parameter               | Description
+----------------------- | -----------
+`-username <user>`      | the username of the account to login to for restricted content.
+`-password <pass>`      | the password of the account to login to for restricted content.
+`-remember-password`    | if set, remember the password for subsequent logins of this user. (Use `-username <username> -remember-password` as login credentials)
+`-qr`                   | display a login QR code to be scanned with the Steam mobile app
+`-no-mobile`            | prefer entering a 2FA code instead of prompting to accept in the Steam mobile app.
+`-loginid <#>`          | a unique 32-bit integer Steam LogonID in decimal, required if running multiple instances of DepotDownloader concurrently.
+
+#### Downloading
+
+Parameter                | Description
+------------------------ | -----------
+`-app <#>`               | the AppID to download.
+`-depot <#>`             | the DepotID to download.
+`-manifest <id>`         | manifest id of content to download (requires `-depot`, default: current for branch).
+`-ugc <#>`               | the UGC ID to download.
+`-pubfile <#>`           | the PublishedFileId to download. (Will automatically resolve to UGC id)
+`-branch <branchname>`   | download from specified branch if available (default: Public).
+`-branchpassword <pass>` | branch password if applicable.
+
+#### Download configuration
+
+Parameter               | Description
+----------------------- | -----------
+`-all-platforms`        | downloads all platform-specific depots when `-app` is used.
+`-os <os>`              | the operating system for which to download the game (windows, macos or linux, default: OS the program is currently running on)
+`-osarch <arch>`        | the architecture for which to download the game (32 or 64, default: the host's architecture)
+`-all-archs`            | download all architecture-specific depots when `-app` is used.
+`-all-languages`        | download all language-specific depots when `-app` is used.
+`-language <lang>`      | the language for which to download the game (default: english)
+`-lowviolence`          | download low violence depots when `-app` is used.
+`-dir <installdir>`     | the directory in which to place downloaded files.
+`-filelist <file.txt>`  | the name of a local file that contains a list of files to download (from the manifest). prefix file path with `regex:` if you want to match with regex. each file path should be on their own line.
+`-validate`             | include checksum verification of files already downloaded.
+`-manifest-only`        | downloads a human readable manifest for any depots that would be downloaded.
+`-cellid <#>`           | the overridden CellID of the content server to download from.
+`-max-downloads <#>`    | maximum number of chunks to download concurrently. (default: 8).
+`-use-lancache`         | forces downloads over the local network via a Lancache instance.
+
+#### Other
+
+Parameter               | Description
+----------------------- | -----------
+`-debug`                | enable verbose debug logging.
+`-V` or `--version`     | print version and runtime.
+
+## Frequently Asked Questions
+
+### Why am I prompted to enter a 2-factor code every time I run the app?
+Your 2-factor code authenticates a Steam session. You need to "remember" your session with `-remember-password` which persists the login key for your Steam session.
+
+### Can I run DepotDownloader while an account is already connected to Steam?
+Any connection to Steam will be closed if they share a LoginID. You can specify a different LoginID with `-loginid`.
+
+### Why doesn't my password containing special characters work? Do I have to specify the password on the command line?
+If you pass the `-password` parameter with a password that contains special characters, you will need to escape the command appropriately for the shell you are using. You do not have to include the `-password` parameter on the command line as long as you include a `-username`. You will be prompted to enter your password interactively.
+
+### I am getting error 401 or no manifest code returned for old manifest ids
+Try logging in with a Steam account, this may happen when using anonymous account.
+
+Steam allows developers to block downloading old manifests, in which case no manifest code is returned even when parameters appear correct.
+
+### Why am I getting slow download speeds and frequent connection timeouts?
+When downloading old builds, cache server may not have the chunks readily available which makes downloading slower.
+Try increasing `-max-downloads` to saturate the network more.

global.json

@@ -0,0 +1,6 @@
+{
+  "sdk": {
+    "version": "9.0.100",
+    "rollForward": "latestMinor"
+  }
+}