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_H_
   6 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_READ_FROM_CACHE_JOB_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "content/browser/service_worker/service_worker_disk_cache.h"
  13 #include "content/common/content_export.h"
  14 #include "net/http/http_byte_range.h"
  15 #include "net/url_request/url_request_job.h"
  16
  17 namespace content {
  18
  19 class ServiceWorkerContextCore;
  20 class ServiceWorkerResponseReader;
  21
  22 // A URLRequestJob derivative used to retrieve script resources
  23 // from the service workers script cache. It uses a response reader
  24 // and pipes the response to the consumer of this url request job.
  25 class CONTENT_EXPORT ServiceWorkerReadFromCacheJob
  26     : public net::URLRequestJob {
  27  public:
  28   ServiceWorkerReadFromCacheJob(
  29       net::URLRequest* request,
  30       net::NetworkDelegate* network_delegate,
  31       base::WeakPtr<ServiceWorkerContextCore> context,
  32       int64 response_id);
  33
  34  private:
  35   virtual ~ServiceWorkerReadFromCacheJob();
  36
  37   // net::URLRequestJob overrides
  38   virtual void Start() OVERRIDE;
  39   virtual void Kill() OVERRIDE;
  40   virtual net::LoadState GetLoadState() const OVERRIDE;
  41   virtual bool GetCharset(std::string* charset) OVERRIDE;
  42   virtual bool GetMimeType(std::string* mime_type) const OVERRIDE;
  43   virtual void GetResponseInfo(net::HttpResponseInfo* info) OVERRIDE;
  44   virtual int GetResponseCode() const OVERRIDE;
  45   virtual void SetExtraRequestHeaders(
  46       const net::HttpRequestHeaders& headers) OVERRIDE;
  47   virtual bool ReadRawData(net::IOBuffer* buf,
  48                            int buf_size,
  49                            int *bytes_read) OVERRIDE;
  50
  51   // Reader completion callbacks.
  52   void OnReadInfoComplete(int result);
  53   void OnReadComplete(int result);
  54
  55   // Helpers
  56   const net::HttpResponseInfo* http_info() const;
  57   bool is_range_request() const { return range_requested_.IsValid(); }
  58   void SetupRangeResponse(int response_data_size);
  59
  60   base::WeakPtr<ServiceWorkerContextCore> context_;
  61   int64 response_id_;
  62   scoped_ptr<ServiceWorkerResponseReader> reader_;
  63   scoped_refptr<HttpResponseInfoIOBuffer> http_info_io_buffer_;
  64   scoped_ptr<net::HttpResponseInfo> http_info_;
  65   net::HttpByteRange range_requested_;
  66   scoped_ptr<net::HttpResponseInfo> range_response_info_;
  67   bool has_been_killed_;
  68   base::WeakPtrFactory<ServiceWorkerReadFromCacheJob> weak_factory_;
  69
  70   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerReadFromCacheJob);
  71 };
  72
  73 }  // namespace content
  74
  75 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_READ_FROM_CACHE_JOB_H_