Bug 1397646 - return empty statusText for HTTP2 fetches and XMLHttpRe…

…quests; r=kershaw,necko-reviewers,sunil

Differential Revision: https://phabricator.services.mozilla.com/D184527

dom/html/HTMLMediaElement.cpp

@@ -127,6 +127,7 @@
 #include "nsSize.h"
 #include "nsThreadUtils.h"
 #include "nsURIHashKey.h"
+#include "nsURLHelper.h"
 #include "nsVideoFrame.h"
 #include "ReferrerInfo.h"
 #include "TimeUnits.h"
@@ -1305,6 +1306,10 @@ HTMLMediaElement::MediaLoadListener::OnStartRequest(nsIRequest* aRequest) {
     Unused << hc->GetResponseStatus(&responseStatus);
     nsAutoCString statusText;
     Unused << hc->GetResponseStatusText(statusText);
+    // we need status text for resist fingerprinting mode's message allowlist
+    if (statusText.IsEmpty()) {
+      net_GetDefaultStatusTextForCode(responseStatus, statusText);
+    }
     element->NotifyLoadError(
         nsPrintfCString("%u: %s", responseStatus, statusText.get()));
 

dom/xhr/tests/mochitest.ini

@@ -42,6 +42,7 @@ support-files =
   xhr_worker.js
   xhr2_worker.js
   xhrAbort_worker.js
+  test_XHR.js
   test_worker_xhr_parameters.js
   test_worker_xhr_system.js
   worker_xhr_cors_redirect.js
@@ -114,6 +115,7 @@ skip-if =
 [test_worker_xhrAbort.html]
 skip-if = (os == "win") || (os == "mac")
 [test_XHR.html]
+skip-if = http2
 [test_xhr_abort_after_load.html]
 [test_XHR_anon.html]
 skip-if =
@@ -124,6 +126,8 @@ skip-if =
 skip-if =
   http3
   http2
+[test_XHR_http2.html]
+skip-if = !http2
 [test_XHR_onuploadprogress.html]
 [test_xhr_overridemimetype_throws_on_invalid_state.html]
 [test_XHR_parameters.html]