tor-browser

commit dac591595425c22eb01fba713617f7b8f59164c1
parent 5c2dc323f00d29171fa7b1afbd075d906898b35b
Author: Daniel Minor <dminor@mozilla.com>
Date:   Fri, 12 Dec 2025 14:12:36 +0000

Bug 1994828 - Set wasm mime type for worker requests; r=dom-worker-reviewers,edenchuang

Differential Revision: https://phabricator.services.mozilla.com/D275507

Diffstat:
M
dom/workers/loader/NetworkLoadHandler.cpp
 | 
20
++++++++++++++++++++

1 file changed, 20 insertions(+), 0 deletions(-)
diff --git a/dom/workers/loader/NetworkLoadHandler.cpp b/dom/workers/loader/NetworkLoadHandler.cpp
@@ -10,6 +10,7 @@
 #include "js/loader/ModuleLoadRequest.h"
 #include "js/loader/ScriptLoadRequest.h"
 #include "mozilla/Encoding.h"
+#include "mozilla/StaticPrefs_javascript.h"
 #include "mozilla/dom/BlobURLProtocolHandler.h"
 #include "mozilla/dom/InternalResponse.h"
 #include "mozilla/dom/Response.h"
@@ -83,6 +84,25 @@ nsresult NetworkLoadHandler::DataReceivedFromNetwork(nsIStreamLoader* aLoader,
     return NS_BINDING_ABORTED;
   }
 
+#ifdef NIGHTLY_BUILD
+  if (StaticPrefs::javascript_options_experimental_wasm_esm_integration()) {
+    if (mRequestHandle->GetRequest()->IsModuleRequest()) {
+      // https://html.spec.whatwg.org/multipage/webappapis.html#fetch-a-single-module-script
+      // Extract the content-type. If its essence is wasm, we'll attempt to
+      // compile this module as a wasm module. (Steps 13.2, 13.6)
+      nsAutoCString mimeType;
+      if (NS_SUCCEEDED(loadContext->mChannel->GetContentType(mimeType))) {
+        if (nsContentUtils::HasWasmMimeTypeEssence(
+                NS_ConvertUTF8toUTF16(mimeType))) {
+          mRequestHandle->GetRequest()
+              ->AsModuleRequest()
+              ->SetHasWasmMimeTypeEssence();
+        }
+      }
+    }
+  }
+#endif
+
   loadContext->mChannel = nullptr;
 
   if (NS_FAILED(aStatus)) {