diff -r 000000000000 -r 6474c204b198 content/base/test/TestGetURL.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/test/TestGetURL.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,85 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "TestHarness.h"
+
+#include "nsIPrincipal.h"
+#include "nsIScriptSecurityManager.h"
+#include "nsIXMLHttpRequest.h"
+
+
+#define TEST_ENSURE_BASE(_test, _msg)       \
+  PR_BEGIN_MACRO                            \
+    if (_test) {                            \
+      fail(_msg);                           \
+      return NS_ERROR_FAILURE;              \
+    }                                       \
+  PR_END_MACRO
+
+#define TEST_ENSURE_SUCCESS(_rv, _msg)      \
+  TEST_ENSURE_BASE(NS_FAILED(_rv), _msg)
+
+#define TEST_ENSURE_FAILED(_rv, _msg)       \
+  TEST_ENSURE_BASE(NS_SUCCEEDED(_rv), _msg)
+
+nsresult TestGetURL(const nsCString& aURL)
+{
+  nsresult rv;
+
+  nsCOMPtr<nsIXMLHttpRequest> xhr =
+    do_CreateInstance(NS_XMLHTTPREQUEST_CONTRACTID, &rv);
+  TEST_ENSURE_SUCCESS(rv, "Couldn't create nsIXMLHttpRequest instance!");
+
+  NS_NAMED_LITERAL_CSTRING(getString, "GET");
+  const nsAString& empty = EmptyString();
+  
+  nsCOMPtr<nsIScriptSecurityManager> secman =
+    do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
+  TEST_ENSURE_SUCCESS(rv, "Couldn't get script security manager!");
+
+  nsCOMPtr<nsIPrincipal> systemPrincipal;
+  rv = secman->GetSystemPrincipal(getter_AddRefs(systemPrincipal));
+  TEST_ENSURE_SUCCESS(rv, "Couldn't get system principal!");
+
+  rv = xhr->Init(systemPrincipal, nullptr, nullptr, nullptr);
+  TEST_ENSURE_SUCCESS(rv, "Couldn't initialize the XHR!");
+
+  rv = xhr->Open(getString, aURL, false, empty, empty);
+  TEST_ENSURE_SUCCESS(rv, "OpenRequest failed!");
+
+  rv = xhr->Send(nullptr);
+  TEST_ENSURE_SUCCESS(rv, "Send failed!");
+
+  nsAutoString response;
+  rv = xhr->GetResponseText(response);
+  TEST_ENSURE_SUCCESS(rv, "GetResponse failed!");
+
+  nsAutoCString responseUTF8 = NS_ConvertUTF16toUTF8(response);
+  printf("#BEGIN\n");
+  printf("%s", responseUTF8.get());
+  printf("\n#EOF\n");
+
+  return NS_OK;
+}
+
+int main(int argc, char** argv)
+{
+  if (argc <  2) {
+    printf("Usage: TestGetURL <url>\n");
+    exit(0);
+  }
+
+  ScopedXPCOM xpcom("XMLHttpRequest");
+  if (xpcom.failed())
+    return 1;
+
+  nsAutoCString targetURL(argv[1]);
+
+  int retval = 0;
+  if (NS_FAILED(TestGetURL(targetURL))) {
+    retval = 1;
+  }
+
+  return retval;
+}