ServiceWorker: Add an API to fallback to renderer for CORS preflight

content/browser/service_worker/service_worker_url_request_job.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_URL_REQUEST_JOB_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_URL_REQUEST_JOB_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 138 matching lines @@
   void OnStreamRegistered(Stream* stream) override;
 
   base::WeakPtr<ServiceWorkerURLRequestJob> GetWeakPtr();
 
  private:
   class BlobConstructionWaiter;
 
   enum ResponseType {
     NOT_DETERMINED,
     FALLBACK_TO_NETWORK,
+    FALLBACK_TO_RENDERER,  // Use this when falling back with CORS check
     FORWARD_TO_SERVICE_WORKER,
   };
 
   enum ResponseBodyType {
     UNKNOWN,
     BLOB,
     STREAM,
   };
 
   // We start processing the request if Start() is called AND response_type_
@@ skipping 23 matching lines @@
                             const std::string& status_text,
                             const ServiceWorkerHeaderMap& headers);
 
   // Creates |http_response_info_| using |http_response_headers_| and calls
   // NotifyHeadersComplete.
   void CommitResponseHeader();
 
   // Creates and commits a response header indicating error.
   void DeliverErrorResponse();
 
+  // Restarts this job to fallback to network.
+  // This can be called after StartRequest.
+  void FinalizeToFallbackToNetwork();
+
+  // Sends back a response with fall_back_required set as true to trigger
+  // subsequent network requests with CORS checking.
+  // This can be called after StartRequest.
+  void FinalizeToFallbackToRenderer();
+
+  // true if need to send back a response with fall_back_required set as true to
+  // trigger subsequent network requests with CORS checking.
+  bool IsNeedToFallbackToRenderer();

[horo, 2016/06/29 05:31:35]

nit: const

[shimazu, 2016/07/04 06:31:11]

Done.

+
   // For UMA.
   void SetResponseBodyType(ResponseBodyType type);
   bool ShouldRecordResult();
   void RecordResult(ServiceWorkerMetrics::URLRequestJobResult result);
   void RecordStatusZeroResponseError(
       blink::WebServiceWorkerResponseError error);
 
   // Releases the resources for streaming.
   void ClearStream();
 
@@ skipping 73 matching lines @@
   EmbeddedWorkerStatus initial_worker_status_ = EmbeddedWorkerStatus::STOPPED;
 
   base::WeakPtrFactory<ServiceWorkerURLRequestJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerURLRequestJob);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_URL_REQUEST_JOB_H_