diff -r 000000000000 -r 6474c204b198 image/test/mochitest/bug767779.sjs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/image/test/mochitest/bug767779.sjs	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,56 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+var timer = Components.classes["@mozilla.org/timer;1"];
+var partTimer = timer.createInstance(Components.interfaces.nsITimer);
+
+function getFileAsInputStream(aFilename) {
+  var file = Components.classes["@mozilla.org/file/directory_service;1"]
+             .getService(Components.interfaces.nsIProperties)
+             .get("CurWorkD", Components.interfaces.nsIFile);
+
+  file.append("tests");
+  file.append("image");
+  file.append("test");
+  file.append("mochitest");
+  file.append(aFilename);
+
+  var fileStream = Components.classes['@mozilla.org/network/file-input-stream;1']
+                   .createInstance(Components.interfaces.nsIFileInputStream);
+  fileStream.init(file, 1, 0, false);
+  return fileStream;
+}
+
+function handleRequest(request, response)
+{
+  response.setHeader("Content-Type", "image/gif", false);
+  response.setHeader("Cache-Control", "no-cache", false);
+  response.setStatusLine(request.httpVersion, 200, "OK");
+  // We're sending data off in a delayed fashion
+  response.processAsync();
+  var inputStream = getFileAsInputStream("animated-gif_trailing-garbage.gif");
+  var available = inputStream.available(); // = 4029 bytes
+  // Send the good data at once
+  response.bodyOutputStream.writeFrom(inputStream, 285);
+  sendParts(inputStream, response);
+}
+
+function sendParts(inputStream, response) {
+  // 3744 left, send in 8 chunks of 468 each
+  partTimer.initWithCallback(getSendNextPart(inputStream, response), 500,
+                             Components.interfaces.nsITimer.TYPE_ONE_SHOT);
+}
+
+function getSendNextPart(inputStream, response) {
+  return function () {
+    response.bodyOutputStream.writeFrom(inputStream, 468);
+    if (!inputStream.available()) {
+      inputStream.close();
+      response.finish();
+    } else {
+      sendParts(inputStream, response);
+    }
+  };
+}
+