stream_resource_handler.h revision 6e8cce623b6e4fe0c9e4af605d675dd9d0338c38 
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
14namespace net {
15class URLRequest;
16}  // namespace net
17
18namespace content {
19
20class StreamRegistry;
21
22// Redirect this resource to a stream.
23class 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_
76