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Add a middleware for browser refresh. (dotnet#24574)
* Add a middleware for browser refresh. * Introduce a middleware that can connect to the dotnet-watch change server * dotnet-watch: Inject the middleware in 3.1 or apps using start hooks \ hosting startup dotnet#23412 * Update src/Tools/dotnet-watch/BrowserRefresh/src/StartupHook.cs * Changes per PR comments * Add a test for reading the script * Changes per PR comments * Updates docs * Fixup test * Add project ref
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‎AspNetCore.sln

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@@ -1445,6 +1445,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Microsoft.NET.Sdk.BlazorWeb
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Microsoft.NET.Sdk.BlazorWebAssembly.Tools", "src\Components\WebAssembly\Sdk\tools\Microsoft.NET.Sdk.BlazorWebAssembly.Tools.csproj", "{175E5CD8-92D4-46BB-882E-3A930D3302D4}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.Watch.BrowserRefresh", "src\Tools\dotnet-watch\BrowserRefresh\src\Microsoft.AspNetCore.Watch.BrowserRefresh.csproj", "{A5CE25E9-89E1-4F2C-9B89-0C161707E700}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.AspNetCore.Watch.BrowserRefresh.Tests", "src\Tools\dotnet-watch\BrowserRefresh\test\Microsoft.AspNetCore.Watch.BrowserRefresh.Tests.csproj", "{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
@@ -6843,6 +6847,30 @@ Global
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{175E5CD8-92D4-46BB-882E-3A930D3302D4}.Release|x64.Build.0 = Release|Any CPU
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{175E5CD8-92D4-46BB-882E-3A930D3302D4}.Release|x86.ActiveCfg = Release|Any CPU
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{175E5CD8-92D4-46BB-882E-3A930D3302D4}.Release|x86.Build.0 = Release|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Debug|x64.ActiveCfg = Debug|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Debug|x64.Build.0 = Debug|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Debug|x86.ActiveCfg = Debug|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Debug|x86.Build.0 = Debug|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Release|Any CPU.Build.0 = Release|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Release|x64.ActiveCfg = Release|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Release|x64.Build.0 = Release|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Release|x86.ActiveCfg = Release|Any CPU
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700}.Release|x86.Build.0 = Release|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Debug|x64.ActiveCfg = Debug|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Debug|x64.Build.0 = Debug|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Debug|x86.ActiveCfg = Debug|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Debug|x86.Build.0 = Debug|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Release|Any CPU.Build.0 = Release|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Release|x64.ActiveCfg = Release|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Release|x64.Build.0 = Release|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Release|x86.ActiveCfg = Release|Any CPU
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6}.Release|x86.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
@@ -7567,6 +7595,8 @@ Global
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{83371889-9A3E-4D16-AE77-EB4F83BC6374} = {FED4267E-E5E4-49C5-98DB-8B3F203596EE}
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{525EBCB4-A870-470B-BC90-845306C337D1} = {FED4267E-E5E4-49C5-98DB-8B3F203596EE}
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{175E5CD8-92D4-46BB-882E-3A930D3302D4} = {FED4267E-E5E4-49C5-98DB-8B3F203596EE}
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{A5CE25E9-89E1-4F2C-9B89-0C161707E700} = {B6118E15-C37A-4B05-B4DF-97FE99790417}
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{E6A23627-8D63-4DF1-A4F2-8881172C1FE6} = {B6118E15-C37A-4B05-B4DF-97FE99790417}
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {3E8720B3-DBDD-498C-B383-2CC32A054E8F}

‎Directory.Build.targets

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<KnownFrameworkReference Condition="'$(UseAspNetCoreSharedRuntime)' != 'true'" Remove="Microsoft.AspNetCore.App" />
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<KnownFrameworkReference Remove="Microsoft.WindowsDesktop.App" />
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<KnownFrameworkReference Condition="'$(UseAspNetCoreSharedRuntime)' == 'true'" Update="Microsoft.AspNetCore.App">
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<KnownFrameworkReference Condition="'$(UseAspNetCoreSharedRuntime)' == 'true' AND '$(DoNotApplyWorkaroundsToMicrosoftAspNetCoreApp)' != 'true'" Update="Microsoft.AspNetCore.App">
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<LatestRuntimeFrameworkVersion>$(SharedFxVersion)</LatestRuntimeFrameworkVersion>
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<DefaultRuntimeFrameworkVersion Condition="'$(IsServicingBuild)' != 'true'">$(SharedFxVersion)</DefaultRuntimeFrameworkVersion>
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<TargetingPackVersion Condition="'$(IsServicingBuild)' != 'true'">$(SharedFxVersion)</TargetingPackVersion>

‎THIRD-PARTY-NOTICES.txt

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@@ -217,3 +217,54 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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License notice for West Wind Live Reload ASP.NET Core Middleware
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=============================================
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MIT License
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-----------
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Copyright (c) 2019-2020 West Wind Technologies
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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License notice for cli-spinners
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=============================================
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MIT License
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Copyright (c) Sindre Sorhus <[email protected]> (https://sindresorhus.com)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎eng/ProjectReferences.props

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<ProjectReferenceProvider Include="Microsoft.AspNetCore.CookiePolicy" ProjectPath="$(RepoRoot)src\Security\CookiePolicy\src\Microsoft.AspNetCore.CookiePolicy.csproj" />
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<ProjectReferenceProvider Include="Microsoft.Web.Xdt.Extensions" ProjectPath="$(RepoRoot)src\SiteExtensions\Microsoft.Web.Xdt.Extensions\src\Microsoft.Web.Xdt.Extensions.csproj" />
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<ProjectReferenceProvider Include="dotnet-getdocument" ProjectPath="$(RepoRoot)src\Tools\dotnet-getdocument\src\dotnet-getdocument.csproj" />
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<ProjectReferenceProvider Include="Microsoft.AspNetCore.Watch.BrowserRefresh" ProjectPath="$(RepoRoot)src\Tools\dotnet-watch\BrowserRefresh\src\Microsoft.AspNetCore.Watch.BrowserRefresh.csproj" />
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<ProjectReferenceProvider Include="Microsoft.Extensions.ApiDescription.Client" ProjectPath="$(RepoRoot)src\Tools\Extensions.ApiDescription.Client\src\Microsoft.Extensions.ApiDescription.Client.csproj" />
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<ProjectReferenceProvider Include="Microsoft.Extensions.ApiDescription.Server" ProjectPath="$(RepoRoot)src\Tools\Extensions.ApiDescription.Server\src\Microsoft.Extensions.ApiDescription.Server.csproj" />
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<ProjectReferenceProvider Include="Microsoft.AspNetCore.DeveloperCertificates.XPlat" ProjectPath="$(RepoRoot)src\Tools\FirstRunCertGenerator\src\Microsoft.AspNetCore.DeveloperCertificates.XPlat.csproj" />

‎eng/Workarounds.targets

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The web sdk adds an implicit framework reference. This removes it until we can update our build to use framework references.
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-->
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<ItemGroup>
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<FrameworkReference Remove="Microsoft.AspNetCore.App" />
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<FrameworkReference Remove="Microsoft.AspNetCore.App" Condition="'$(DoNotApplyWorkaroundsToMicrosoftAspNetCoreApp)' != 'true'" />
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<!-- Required because the Razor SDK will generate attributes -->
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<Reference Include="Microsoft.AspNetCore.Mvc" Condition="'$(UsingMicrosoftNETSdkWeb)' == 'true' AND '$(TargetFrameworkIdentifier)' == '.NETCoreApp' AND '$(GenerateRazorAssemblyInfo)' == 'true'" />
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</ItemGroup>

‎src/Tools/Tools.slnf

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"src\\Tools\\dotnet-user-secrets\\src\\dotnet-user-secrets.csproj",
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"src\\Tools\\dotnet-user-secrets\\test\\dotnet-user-secrets.Tests.csproj",
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"src\\Tools\\dotnet-watch\\src\\dotnet-watch.csproj",
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"src\\Tools\\dotnet-watch\\test\\dotnet-watch.Tests.csproj"
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"src\\Tools\\dotnet-watch\\BrowserRefresh\\src\\Microsoft.AspNetCore.Watch.BrowserRefresh.csproj",
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"src\\Tools\\dotnet-watch\\BrowserRefresh\\test\\Microsoft.AspNetCore.Watch.BrowserRefresh.Tests.csproj",
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"src\\Tools\\dotnet-watch\\test\\dotnet-watch.Tests.csproj",
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"src\\Middleware\\StaticFiles\\src\\Microsoft.AspNetCore.StaticFiles.csproj",
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"src\\Hosting\\TestHost\\src\\Microsoft.AspNetCore.TestHost.csproj"
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]
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}
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}

‎src/Tools/dotnet-watch/BrowserRefresh/src/BrowserRefreshMiddleware.cs

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// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using System.Collections.Generic;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Http.Features;
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using Microsoft.Extensions.Logging;
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using Microsoft.Net.Http.Headers;
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namespace Microsoft.AspNetCore.Watch.BrowserRefresh
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{
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public class BrowserRefreshMiddleware
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{
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private static readonly MediaTypeHeaderValue _textHtmlMediaType = new MediaTypeHeaderValue("text/html");
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private readonly RequestDelegate _next;
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private readonly ILogger _logger;
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public BrowserRefreshMiddleware(RequestDelegate next, ILogger<BrowserRefreshMiddleware> logger) =>
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(_next, _logger) = (next, logger);
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public async Task InvokeAsync(HttpContext context)
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{
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// We only need to support this for requests that could be initiated by a browser.
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if (IsBrowserRequest(context))
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{
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// Use a custom StreamWrapper to rewrite output on Write/WriteAsync
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using var responseStreamWrapper = new ResponseStreamWrapper(context, _logger);
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var originalBodyFeature = context.Features.Get<IHttpResponseBodyFeature>();
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context.Features.Set<IHttpResponseBodyFeature>(new StreamResponseBodyFeature(responseStreamWrapper));
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try
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{
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await _next(context);
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}
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finally
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{
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context.Features.Set(originalBodyFeature);
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}
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if (responseStreamWrapper.IsHtmlResponse && _logger.IsEnabled(LogLevel.Debug))
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{
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if (responseStreamWrapper.ScriptInjectionPerformed)
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{
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Log.BrowserConfiguredForRefreshes(_logger);
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}
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else
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{
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Log.FailedToConfiguredForRefreshes(_logger);
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}
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}
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}
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else
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{
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await _next(context);
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}
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}
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internal static bool IsBrowserRequest(HttpContext context)
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{
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var request = context.Request;
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if (!HttpMethods.IsGet(request.Method) && !HttpMethods.IsPost(request.Method))
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{
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return false;
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}
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var typedHeaders = request.GetTypedHeaders();
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if (!(typedHeaders.Accept is IList<MediaTypeHeaderValue> acceptHeaders))
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{
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return false;
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}
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for (var i = 0; i < acceptHeaders.Count; i++)
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{
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if (acceptHeaders[i].IsSubsetOf(_textHtmlMediaType))
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{
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return true;
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}
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}
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return false;
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}
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internal static class Log
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{
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LogLevel.Debug,
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new EventId(1, "SetUpResponseForBrowserRefresh"),
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"Response markup is scheduled to include browser refresh script injection.");
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private static readonly Action<ILogger, Exception?> _browserConfiguredForRefreshes = LoggerMessage.Define(
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LogLevel.Debug,
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new EventId(2, "BrowserConfiguredForRefreshes"),
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"Response markup was updated to include browser refresh script injection.");
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private static readonly Action<ILogger, Exception?> _failedToConfigureForRefreshes = LoggerMessage.Define(
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LogLevel.Debug,
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new EventId(3, "FailedToConfiguredForRefreshes"),
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"Unable to configure browser refresh script injection on the response.");
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public static void SetupResponseForBrowserRefresh(ILogger logger) => _setupResponseForBrowserRefresh(logger, null);
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public static void BrowserConfiguredForRefreshes(ILogger logger) => _browserConfiguredForRefreshes(logger, null);
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public static void FailedToConfiguredForRefreshes(ILogger logger) => _failedToConfigureForRefreshes(logger, null);
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}
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}
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}

‎src/Tools/dotnet-watch/BrowserRefresh/src/HostingFilter.cs

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// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using Microsoft.AspNetCore.Builder;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.DependencyInjection.Extensions;
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[assembly: HostingStartup(typeof(Microsoft.AspNetCore.Watch.BrowserRefresh.HostingStartup))]
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namespace Microsoft.AspNetCore.Watch.BrowserRefresh
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{
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internal sealed class HostingStartup : IHostingStartup, IStartupFilter
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{
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public void Configure(IWebHostBuilder builder)
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{
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builder.ConfigureServices(services => services.TryAddEnumerable(ServiceDescriptor.Singleton<IStartupFilter>(this)));
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}
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public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
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{
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return app =>
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{
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app.UseMiddleware<BrowserRefreshMiddleware>();
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next(app);
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};
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}
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}
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}

‎src/Tools/dotnet-watch/BrowserRefresh/src/Microsoft.AspNetCore.Watch.BrowserRefresh.csproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<!-- This feature is supported in projects targeting 3.1 or later.-->
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<TargetFramework>netcoreapp3.1</TargetFramework>
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<IsPackable>false</IsPackable>
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<Nullable>enable</Nullable>
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<IsShipping>false</IsShipping>
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<UseAspNetCoreSharedRuntime>true</UseAspNetCoreSharedRuntime>
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<DoNotApplyWorkaroundsToMicrosoftAspNetCoreApp>true</DoNotApplyWorkaroundsToMicrosoftAspNetCoreApp>
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<ExcludeFromSourceBuild>false</ExcludeFromSourceBuild>
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</PropertyGroup>
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<ItemGroup>
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<FrameworkReference Include="Microsoft.AspNetCore.App" />
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<EmbeddedResource Include="WebSocketScriptInjection.js" />
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</ItemGroup>
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</Project>

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