1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
// Copyright (c) 2012 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 WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_
#define WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/platform_file.h"
#include "net/http/http_byte_range.h"
#include "net/url_request/url_request_job.h"
#include "webkit/blob/blob_data.h"
#include "webkit/storage/webkit_storage_export.h"
namespace base {
class MessageLoopProxy;
struct PlatformFileInfo;
}
namespace fileapi {
class FileSystemContext;
}
namespace net {
class DrainableIOBuffer;
class IOBuffer;
}
namespace webkit_blob {
class FileStreamReader;
// A request job that handles reading blob URLs.
class WEBKIT_STORAGE_EXPORT BlobURLRequestJob : public net::URLRequestJob {
public:
BlobURLRequestJob(net::URLRequest* request,
net::NetworkDelegate* network_delegate,
BlobData* blob_data,
fileapi::FileSystemContext* file_system_context,
base::MessageLoopProxy* resolving_message_loop_proxy);
// net::URLRequestJob methods.
virtual void Start() OVERRIDE;
virtual void Kill() OVERRIDE;
virtual bool ReadRawData(net::IOBuffer* buf,
int buf_size,
int* bytes_read) OVERRIDE;
virtual bool GetMimeType(std::string* mime_type) const OVERRIDE;
virtual void GetResponseInfo(net::HttpResponseInfo* info) OVERRIDE;
virtual int GetResponseCode() const OVERRIDE;
virtual void SetExtraRequestHeaders(
const net::HttpRequestHeaders& headers) OVERRIDE;
protected:
virtual ~BlobURLRequestJob();
private:
typedef std::map<size_t, FileStreamReader*> IndexToReaderMap;
// For preparing for read: get the size, apply the range and perform seek.
void DidStart();
bool AddItemLength(size_t index, int64 item_length);
void CountSize();
void DidCountSize(int error);
void DidGetFileItemLength(size_t index, int64 result);
void Seek(int64 offset);
// For reading the blob.
bool ReadLoop(int* bytes_read);
bool ReadItem();
void AdvanceItem();
void AdvanceBytesRead(int result);
bool ReadBytesItem(const BlobData::Item& item, int bytes_to_read);
bool ReadFileItem(FileStreamReader* reader, int bytes_to_read);
void DidReadFile(int result);
void DeleteCurrentFileReader();
int ComputeBytesToRead() const;
int BytesReadCompleted();
void NotifySuccess();
void NotifyFailure(int);
void HeadersCompleted(int status_code, const std::string& status_txt);
// Returns a FileStreamReader for a blob item at |index|.
// If the item at |index| is not of file this returns NULL.
FileStreamReader* GetFileStreamReader(size_t index);
// Creates a FileStreamReader for the item at |index| with additional_offset.
void CreateFileStreamReader(size_t index, int64 additional_offset);
base::WeakPtrFactory<BlobURLRequestJob> weak_factory_;
scoped_refptr<BlobData> blob_data_;
scoped_refptr<fileapi::FileSystemContext> file_system_context_;
scoped_refptr<base::MessageLoopProxy> file_thread_proxy_;
std::vector<int64> item_length_list_;
int64 total_size_;
int64 remaining_bytes_;
int pending_get_file_info_count_;
IndexToReaderMap index_to_reader_;
size_t current_item_index_;
int64 current_item_offset_;
scoped_refptr<net::DrainableIOBuffer> read_buf_;
bool error_;
bool headers_set_;
bool byte_range_set_;
net::HttpByteRange byte_range_;
scoped_ptr<net::HttpResponseInfo> response_info_;
DISALLOW_COPY_AND_ASSIGN(BlobURLRequestJob);
};
} // namespace webkit_blob
#endif // WEBKIT_BLOB_BLOB_URL_REQUEST_JOB_H_
|
