import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/workers/test/serviceworkers/fetch/context/beacon.sjs

@@ -0,0 +1,43 @@
+/*
+ * This is based on dom/tests/mochitest/beacon/beacon-originheader-handler.sjs.
+ */
+
+function handleRequest(request, response)
+{
+  response.setHeader("Cache-Control", "no-cache", false);
+  response.setHeader("Content-Type", "text/plain", false);
+
+  // case XHR-REQUEST: the xhr-request tries to query the
+  // stored context from the beacon request.
+  if (request.queryString == "queryContext") {
+    var context = getState("interceptContext");
+    // if the beacon already stored the context - return.
+    if (context) {
+      response.write(context);
+      setState("interceptContext", "");
+      return;
+    }
+    // otherwise wait for the beacon request
+    response.processAsync();
+    setObjectState("sw-xhr-response", response);
+    return;
+  }
+
+  // case BEACON-REQUEST: get the beacon context and
+  // store the context on the server.
+  var context = request.queryString;
+  setState("interceptContext", context);
+
+  // if there is an xhr-request waiting, return the context now.
+  try{
+    getObjectState("sw-xhr-response", function(xhrResponse) {
+      if (!xhrResponse) {
+        return;
+      }
+      setState("interceptContext", "");
+      xhrResponse.write(context);
+      xhrResponse.finish();
+    });
+  } catch(e) {
+  }
+}