src/content/browser/service_worker/service_worker_read_from_cache_job.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_READ_FROM_CACHE_JOB_
   6 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_READ_FROM_CACHE_JOB_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "content/browser/service_worker/service_worker_disk_cache.h"
  11 #include "content/common/content_export.h"
  12 #include "net/http/http_byte_range.h"
  13 #include "net/url_request/url_request_job.h"
  14
  15 namespace content {
  16
  17 class ServiceWorkerContextCore;
  18 class ServiceWorkerResponseReader;
  19
  20 // A URLRequestJob derivative used to retrieve script resources
  21 // from the service workers script cache. It uses a response reader
  22 // and pipes the response to the consumer of this url request job.
  23 class CONTENT_EXPORT ServiceWorkerReadFromCacheJob
  24     : public net::URLRequestJob {
  25  public:
  26   ServiceWorkerReadFromCacheJob(
  27       net::URLRequest* request,
  28       net::NetworkDelegate* network_delegate,
  29       base::WeakPtr<ServiceWorkerContextCore> context,
  30       int64 response_id);
  31
  32  private:
  33   virtual ~ServiceWorkerReadFromCacheJob();
  34
  35   // net::URLRequestJob overrides
  36   virtual void Start() OVERRIDE;
  37   virtual void Kill() OVERRIDE;
  38   virtual net::LoadState GetLoadState() const OVERRIDE;
  39   virtual bool GetCharset(std::string* charset) OVERRIDE;
  40   virtual bool GetMimeType(std::string* mime_type) const OVERRIDE;
  41   virtual void GetResponseInfo(net::HttpResponseInfo* info) OVERRIDE;
  42   virtual int GetResponseCode() const OVERRIDE;
  43   virtual void SetExtraRequestHeaders(
  44       const net::HttpRequestHeaders& headers) OVERRIDE;
  45   virtual bool ReadRawData(net::IOBuffer* buf,
  46                            int buf_size,
  47                            int *bytes_read) OVERRIDE;
  48
  49   // Reader completion callbacks.
  50   void OnReadInfoComplete(int result);
  51   void OnReadComplete(int result);
  52
  53   // Helpers
  54   const net::HttpResponseInfo* http_info() const;
  55   bool is_range_request() const { return range_requested_.IsValid(); }
  56   void SetupRangeResponse(int response_data_size);
  57
  58   base::WeakPtr<ServiceWorkerContextCore> context_;
  59   int64 response_id_;
  60   scoped_ptr<ServiceWorkerResponseReader> reader_;
  61   scoped_refptr<HttpResponseInfoIOBuffer> http_info_io_buffer_;
  62   scoped_ptr<net::HttpResponseInfo> http_info_;
  63   net::HttpByteRange range_requested_;
  64   scoped_ptr<net::HttpResponseInfo> range_response_info_;
  65   bool has_been_killed_;
  66   base::WeakPtrFactory<ServiceWorkerReadFromCacheJob> weak_factory_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerReadFromCacheJob);
  69 };
  70
  71 }  // namespace content
  72
  73 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_READ_FROM_CACHE_JOB_