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[Blazor] Update WebAssembly.DevServer to serve the Blazor-Environment header #57971

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Merged
merged 3 commits into from
Sep 20, 2024
Merged

[Blazor] Update WebAssembly.DevServer to serve the Blazor-Environment header #57971

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f7f946a
Serve 'Blazor-Environment' header
MackinnonBuck Sep 19, 2024
097101a
PR feedback
MackinnonBuck Sep 19, 2024
f196bb1
Update src/Components/WebAssembly/DevServer/src/Server/Startup.cs
MackinnonBuck Sep 20, 2024
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23 changes: 13 additions & 10 deletions src/Components/WebAssembly/DevServer/src/Server/Startup.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
// The .NET Foundation licenses this file to you under the MIT license.

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
Expand Down Expand Up @@ -29,27 +30,29 @@ public static void Configure(IApplicationBuilder app, IConfiguration configurati

app.UseWebAssemblyDebugging();

bool applyCopHeaders = configuration.GetValue<bool>("ApplyCopHeaders");
var webHostEnvironment = app.ApplicationServices.GetRequiredService<IWebHostEnvironment>();
var applyCopHeaders = configuration.GetValue<bool>("ApplyCopHeaders");

if (applyCopHeaders)
app.Use(async (ctx, next) =>
{
app.Use(async (ctx, next) =>
if (ctx.Request.Path.StartsWithSegments("/_framework") && !ctx.Request.Path.StartsWithSegments("/_framework/blazor.server.js") && !ctx.Request.Path.StartsWithSegments("/_framework/blazor.web.js"))
{
if (ctx.Request.Path.StartsWithSegments("/_framework") && !ctx.Request.Path.StartsWithSegments("/_framework/blazor.server.js") && !ctx.Request.Path.StartsWithSegments("/_framework/blazor.web.js"))
ctx.Response.Headers.Append("Blazor-Environment", webHostEnvironment.EnvironmentName);

if (applyCopHeaders)
{
string fileExtension = Path.GetExtension(ctx.Request.Path);
if (string.Equals(fileExtension, ".js"))
var fileExtension = Path.GetExtension(ctx.Request.Path);
if (string.Equals(fileExtension, ".js", StringComparison.Ordinal))
{
// Browser multi-threaded runtime requires cross-origin policy headers to enable SharedArrayBuffer.
ApplyCrossOriginPolicyHeaders(ctx);
}
}
}

await next(ctx);
});
}
await next(ctx);
});

//app.UseBlazorFrameworkFiles();
app.UseRouting();

app.UseStaticFiles(new StaticFileOptions
Expand Down
3 changes: 3 additions & 0 deletions src/Components/test/E2ETest/Tests/WebAssemblyConfigurationTest.cs
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Expand Up @@ -37,6 +37,9 @@ public void WebAssemblyConfiguration_Works()
// Verify values from the default 'appsettings.json' are read.
Browser.Equal("Default key1-value", () => _appElement.FindElement(By.Id("key1")).Text);

// Verify that the dev server always correctly serves the 'Blazor-Environment: Development' header.
Browser.Equal("Development", () => _appElement.FindElement(By.Id("environment")).Text);

if (_serverFixture.TestTrimmedOrMultithreadingApps)
{
// Verify values overriden by an environment specific 'appsettings.$(Environment).json are read
Expand Down
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