89 lines
No EOL
3.7 KiB
C#
89 lines
No EOL
3.7 KiB
C#
using AngleSharp.Io;
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using Iceshrimp.Backend.Core.Middleware;
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using Microsoft.AspNetCore.StaticFiles;
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using Microsoft.Extensions.FileProviders;
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using Microsoft.Extensions.Primitives;
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namespace Iceshrimp.Backend.Core.Extensions;
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public static class WebApplicationBlazorFrameworkExtensions
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{
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private static readonly string? DotnetModifiableAssemblies =
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GetNonEmptyEnvironmentVariableValue("DOTNET_MODIFIABLE_ASSEMBLIES");
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private static readonly string? AspnetcoreBrowserTools =
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GetNonEmptyEnvironmentVariableValue("__ASPNETCORE_BROWSER_TOOLS");
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private static string? GetNonEmptyEnvironmentVariableValue(string name)
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{
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var environmentVariable = Environment.GetEnvironmentVariable(name);
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return environmentVariable is not { Length: > 0 } ? null : environmentVariable;
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}
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private static void AddMapping(
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this FileExtensionContentTypeProvider provider,
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string name,
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string mimeType
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)
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{
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provider.Mappings.TryAdd(name, mimeType);
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}
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private static StaticFileOptions CreateStaticFilesOptions(IFileProvider webRootFileProvider)
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{
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var staticFilesOptions = new StaticFileOptions { FileProvider = webRootFileProvider };
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var contentTypeProvider = new FileExtensionContentTypeProvider();
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contentTypeProvider.AddMapping(".dll", "application/octet-stream");
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contentTypeProvider.AddMapping(".webcil", "application/octet-stream");
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contentTypeProvider.AddMapping(".pdb", "application/octet-stream");
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contentTypeProvider.AddMapping(".br", "application/octet-stream");
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contentTypeProvider.AddMapping(".dat", "application/octet-stream");
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contentTypeProvider.AddMapping(".blat", "application/octet-stream");
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staticFilesOptions.ContentTypeProvider = contentTypeProvider;
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staticFilesOptions.OnPrepareResponse = (Action<StaticFileResponseContext>)(fileContext =>
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{
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fileContext.Context.Response.Headers.Append(HeaderNames.CacheControl, (StringValues)"no-cache");
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var path = fileContext.Context.Request.Path;
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var extension = Path.GetExtension(path.Value);
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if (!string.Equals(extension, ".gz") && !string.Equals(extension, ".br"))
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return;
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var withoutExtension = Path.GetFileNameWithoutExtension(path.Value);
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if (withoutExtension == null ||
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!contentTypeProvider.TryGetContentType(withoutExtension, out var contentType))
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return;
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fileContext.Context.Response.ContentType = contentType;
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});
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return staticFilesOptions;
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}
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public static IApplicationBuilder UseBlazorFrameworkFilesWithTransparentDecompression(this IApplicationBuilder app)
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{
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var webHostEnvironment = app.ApplicationServices.GetRequiredService<IWebHostEnvironment>();
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var options = CreateStaticFilesOptions(webHostEnvironment.WebRootFileProvider);
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app.MapWhen(Predicate, subBuilder =>
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{
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subBuilder.Use(async (context, next) =>
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{
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context.Response.Headers.Append("Blazor-Environment", webHostEnvironment.EnvironmentName);
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if (AspnetcoreBrowserTools != null)
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context.Response.Headers.Append("ASPNETCORE-BROWSER-TOOLS", AspnetcoreBrowserTools);
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if (DotnetModifiableAssemblies != null)
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context.Response.Headers.Append("DOTNET-MODIFIABLE-ASSEMBLIES",
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DotnetModifiableAssemblies);
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await next(context);
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});
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subBuilder.UseMiddleware<ContentEncodingNegotiator>();
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subBuilder.UseStaticFiles(options);
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});
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return app;
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bool Predicate(HttpContext ctx) => ctx.Request.Path.StartsWithSegments(new PathString(), out var remaining) &&
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remaining.StartsWithSegments((PathString)"/_framework") &&
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!remaining.StartsWithSegments((PathString)"/_framework/blazor.server.js") &&
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!remaining.StartsWithSegments((PathString)"/_framework/blazor.web.js");
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}
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} |