[browser][WBT] EventPipe - end to end test

eng/testing/scenarios/BuildWasmAppsJobsList.txt

@@ -15,6 +15,7 @@ Wasm.Build.Tests.Blazor.NativeTests
 Wasm.Build.Tests.Blazor.NoopNativeRebuildTest
 Wasm.Build.Tests.Blazor.WorkloadRequiredTests
 Wasm.Build.Tests.Blazor.SignalRClientTests
+Wasm.Build.Tests.Blazor.EventPipeDiagnosticsTests
 Wasm.Build.Tests.BuildPublishTests
 Wasm.Build.Tests.ConfigSrcTests
 Wasm.Build.Tests.DllImportTests

src/mono/browser/runtime/diagnostics/diagnostics-js.ts

@@ -140,6 +140,9 @@ export function cleanupClient () {
 }
 
 export function setupJsClient (client:IDiagnosticClient) {
+    if (nextJsClient.promise_control.isDone) {
+        throw new Error("multiple clients in parallel are not allowed");
+    }
     nextJsClient.promise_control.resolve(client);
 }
 

src/mono/wasm/Wasm.Build.Tests/Blazor/BlazorRunOptions.cs

@@ -29,6 +29,7 @@ public BlazorRunOptions(
         string                          BrowserPath             = "",
         string                          Locale                  = "en-US",
         int?                            ExpectedExitCode        = 0,
+        int?                            TimeoutSeconds          = 10,
         string                          CustomBundleDir         = "",
         bool                            CheckCounter            = true,
         Func<IPage, Task>?              Test                    = null,
@@ -48,6 +49,7 @@ public BlazorRunOptions(
         Locale,
         ExpectedExitCode,
         CustomBundleDir,
+        TimeoutSeconds,
         ExecuteAfterLoaded
     )
     {

src/mono/wasm/Wasm.Build.Tests/BrowserStructures/RunOptions.cs

@@ -27,6 +27,7 @@ public abstract record RunOptions
     string Locale = "en-US",
     int? ExpectedExitCode = 0,
     string CustomBundleDir = "",
+    int? TimeoutSeconds = 10,
     Func<RunOptions, IPage, Task>? ExecuteAfterLoaded = null
 );
 

src/mono/wasm/Wasm.Build.Tests/Templates/WasmTemplateTestsBase.cs

@@ -335,7 +335,7 @@ private async Task<RunResult> BrowserRunTest(string runArgs,
             await blazorOp.Test(page);
 
         _testOutput.WriteLine($"Waiting for additional 10secs to see if any errors are reported");
-        int exitCode = await runner.WaitForExitMessageAsync(TimeSpan.FromSeconds(10));
+        int exitCode = await runner.WaitForExitMessageAsync(TimeSpan.FromSeconds(runOptions.TimeoutSeconds ?? 0));
         if (runOptions.ExpectedExitCode is not null && exitCode != runOptions.ExpectedExitCode)
             throw new Exception($"Expected exit code {runOptions.ExpectedExitCode} but got {exitCode}.\nconsoleOutput={string.Join("\n", consoleOutput)}");
 

src/mono/wasm/Wasm.Build.Tests/Wasm.Build.Tests.csproj

@@ -48,6 +48,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Playwright" Version="1.47.0" />
     <PackageReference Include="MSBuild.StructuredLogger" Version="2.2.350" />
+    <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent" Version="3.1.10" />
     <ProjectReference Include="$(RepoRoot)src\tasks\Microsoft.NET.Sdk.WebAssembly.Pack.Tasks\Microsoft.NET.Sdk.WebAssembly.Pack.Tasks.csproj" />
 
     <None Include="$(BrowserProjectRoot)\test-main.js" CopyToOutputDirectory="PreserveNewest" />

src/mono/wasm/host/DevServer/DevServerStartup.cs

@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System;
 using System.IO;
 using System.Net.WebSockets;
 using System.Threading.Tasks;
@@ -115,6 +116,58 @@ public static void Configure(IApplicationBuilder app, IOptions<DevServerOptions>
                     }
                 }
             });
+
+            // Add general-purpose file upload endpoint when DEVSERVER_UPLOAD_PATH is set
+            string? fileUploadPath = Environment.GetEnvironmentVariable("DEVSERVER_UPLOAD_PATH");
+            if (!string.IsNullOrEmpty(fileUploadPath))
+            {
+                // Ensure the upload directory exists
+                if (!Directory.Exists(fileUploadPath))
+                {
+                    Directory.CreateDirectory(fileUploadPath!);
+                }
+
+                // Route with filename parameter
+                endpoints.MapPost("/upload/{filename}", async context =>
+                {
+                    try
+                    {
+                        // Get the filename from the route
+                        var routeValues = context.Request.RouteValues;
+                        string? rawFileName = routeValues["filename"]?.ToString();
+
+                        // Generate a unique name if none provided
+                        if (string.IsNullOrEmpty(rawFileName))
+                        {
+                            rawFileName = $"upload_{Guid.NewGuid():N}";
+                        }
+
+                        // Sanitize filename - IMPORTANT: Only use GetFileName to strip any path components
+                        // This prevents directory traversal attacks like "../../../etc/passwd"
+                        string fileName = Path.GetFileName(rawFileName);
+
+                        if (string.IsNullOrEmpty(fileName))
+                        {
+                            fileName = $"upload_{Guid.NewGuid():N}";
+                        }
+
+                        string filePath = Path.Combine(fileUploadPath!, fileName);
+
+                        using (var outputStream = new FileStream(filePath, FileMode.Create))
+                        {
+                            await context.Request.Body.CopyToAsync(outputStream);
+                        }
+
+                        await context.Response.WriteAsync($"File saved to {filePath}");
+                    }
+                    catch (Exception ex)
+                    {
+                        context.Response.StatusCode = 500;
+                        await context.Response.WriteAsync($"Error processing upload: {ex.Message}");
+                    }
+                });
+            }
+
         });
 
         ServerURLsProvider.ResolveServerUrlsOnApplicationStarted(app, logger, applicationLifetime, realUrlsAvailableTcs, "/_framework/debug");

src/mono/wasm/testassets/BlazorBasicTestApp/App/BlazorBasicTestApp.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="10.0.0-alpha.2.25073.4" />
-    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="10.0.0-alpha.2.25073.4" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="10.0.0-alpha.2.25073.4" PrivateAssets="all" Condition="'$(WBTDevServer)' != 'true'" />
   </ItemGroup>
 
 </Project>

src/mono/wasm/testassets/BlazorBasicTestApp/App/BlazorBasicTestApp.runtimeconfig.json

@@ -0,0 +1,13 @@
+{
+    "runtimeOptions": {
+        "wasmHostProperties": {
+            "perHostConfig": [
+                {
+                    "name": "browser",
+                    "html-path": "index.html",
+                    "Host": "browser"
+                }
+            ]
+        }
+    }
+}