content/browser/loader/stream_resource_handler.h

   1 // Copyright (c) 2013 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_LOADER_STREAM_RESOURCE_HANDLER_H_
   6 #define CONTENT_BROWSER_LOADER_STREAM_RESOURCE_HANDLER_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "content/browser/loader/resource_handler.h"
  11 #include "content/browser/streams/stream_write_observer.h"
  12 #include "url/gurl.h"
  13
  14 namespace net {
  15 class URLRequest;
  16 }  // namespace net
  17
  18 namespace content {
  19
  20 class StreamRegistry;
  21
  22 // Redirect this resource to a stream.
  23 class StreamResourceHandler : public StreamWriteObserver,
  24                               public ResourceHandler {
  25  public:
  26   // |origin| will be used to construct the URL for the Stream. See
  27   // WebCore::BlobURL and and WebCore::SecurityOrigin in Blink to understand
  28   // how origin check is done on resource loading.
  29   StreamResourceHandler(net::URLRequest* request,
  30                         StreamRegistry* registry,
  31                         const GURL& origin);
  32   virtual ~StreamResourceHandler();
  33
  34   virtual bool OnUploadProgress(uint64 position, uint64 size) OVERRIDE;
  35
  36   // Not needed, as this event handler ought to be the final resource.
  37   virtual bool OnRequestRedirected(const net::RedirectInfo& redirect_info,
  38                                    ResourceResponse* resp,
  39                                    bool* defer) OVERRIDE;
  40
  41   virtual bool OnResponseStarted(ResourceResponse* resp,
  42                                  bool* defer) OVERRIDE;
  43
  44   virtual bool OnWillStart(const GURL& url, bool* defer) OVERRIDE;
  45
  46   virtual bool OnBeforeNetworkStart(const GURL& url, bool* defer) OVERRIDE;
  47
  48   // Create a new buffer to store received data.
  49   virtual bool OnWillRead(scoped_refptr<net::IOBuffer>* buf,
  50                           int* buf_size,
  51                           int min_size) OVERRIDE;
  52
  53   // A read was completed, forward the data to the Stream.
  54   virtual bool OnReadCompleted(int bytes_read, bool* defer) OVERRIDE;
  55
  56   virtual void OnResponseCompleted(const net::URLRequestStatus& status,
  57                                    const std::string& sec_info,
  58                                    bool* defer) OVERRIDE;
  59
  60   virtual void OnDataDownloaded(int bytes_downloaded) OVERRIDE;
  61
  62   Stream* stream() { return stream_.get(); }
  63
  64  private:
  65   virtual void OnSpaceAvailable(Stream* stream) OVERRIDE;
  66   virtual void OnClose(Stream* stream) OVERRIDE;
  67
  68   scoped_refptr<Stream> stream_;
  69   scoped_refptr<net::IOBuffer> read_buffer_;
  70   DISALLOW_COPY_AND_ASSIGN(StreamResourceHandler);
  71 };
  72
  73 }  // namespace content
  74
  75 #endif  // CONTENT_BROWSER_LOADER_STREAM_RESOURCE_HANDLER_H_