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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef NET_BASE_UPLOAD_DATA_STREAM_H_ | 5 #ifndef NET_BASE_UPLOAD_DATA_STREAM_H_ |
6 #define NET_BASE_UPLOAD_DATA_STREAM_H_ | 6 #define NET_BASE_UPLOAD_DATA_STREAM_H_ |
7 | 7 |
8 #include "net/base/file_stream.h" | 8 #include "net/base/file_stream.h" |
9 #include "net/base/upload_data.h" | 9 #include "net/base/upload_data.h" |
10 | 10 |
11 namespace net { | 11 namespace net { |
12 | 12 |
13 class IOBuffer; | 13 class IOBuffer; |
14 | 14 |
15 class UploadDataStream { | 15 class UploadDataStream { |
16 public: | 16 public: |
17 explicit UploadDataStream(const UploadData* data); | 17 explicit UploadDataStream(UploadData* data); |
18 ~UploadDataStream(); | 18 ~UploadDataStream(); |
19 | 19 |
20 // Returns the stream's buffer and buffer length. | 20 // Returns the stream's buffer and buffer length. |
21 IOBuffer* buf() const { return buf_; } | 21 IOBuffer* buf() const { return buf_; } |
22 size_t buf_len() const { return buf_len_; } | 22 size_t buf_len() const { return buf_len_; } |
23 | 23 |
24 // Call to indicate that a portion of the stream's buffer was consumed. This | 24 // Call to indicate that a portion of the stream's buffer was consumed. This |
25 // call modifies the stream's buffer so that it contains the next segment of | 25 // call modifies the stream's buffer so that it contains the next segment of |
26 // the upload data to be consumed. | 26 // the upload data to be consumed. |
27 void DidConsume(size_t num_bytes); | 27 void DidConsume(size_t num_bytes); |
28 | 28 |
29 // Returns the total size of the data stream and the current position. | 29 // Returns the total size of the data stream and the current position. |
30 // size() is not to be used to determine whether the stream has ended | 30 // size() is not to be used to determine whether the stream has ended |
31 // because it is possible for the stream to end before its size is reached, | 31 // because it is possible for the stream to end before its size is reached, |
32 // for example, if the file is truncated. | 32 // for example, if the file is truncated. |
33 uint64 size() const { return total_size_; } | 33 uint64 size() const { return total_size_; } |
34 uint64 position() const { return current_position_; } | 34 uint64 position() const { return current_position_; } |
35 | 35 |
36 // Returns whether there is no more data to read, regardless of whether | 36 // Returns whether there is no more data to read, regardless of whether |
37 // position < size. | 37 // position < size. |
38 bool eof() const { return eof_; } | 38 bool eof() const { return eof_; } |
39 | 39 |
40 private: | 40 private: |
41 // Fills the buffer with any remaining data and sets eof_ if there was nothing | 41 // Fills the buffer with any remaining data and sets eof_ if there was nothing |
42 // left to fill the buffer with. | 42 // left to fill the buffer with. |
43 void FillBuf(); | 43 void FillBuf(); |
44 | 44 |
45 const UploadData* data_; | 45 UploadData* data_; |
46 | 46 |
47 // This buffer is filled with data to be uploaded. The data to be sent is | 47 // This buffer is filled with data to be uploaded. The data to be sent is |
48 // always at the front of the buffer. If we cannot send all of the buffer at | 48 // always at the front of the buffer. If we cannot send all of the buffer at |
49 // once, then we memmove the remaining portion and back-fill the buffer for | 49 // once, then we memmove the remaining portion and back-fill the buffer for |
50 // the next "write" call. buf_len_ indicates how much data is in the buffer. | 50 // the next "write" call. buf_len_ indicates how much data is in the buffer. |
51 enum { kBufSize = 16384 }; | 51 enum { kBufSize = 16384 }; |
52 scoped_refptr<IOBuffer> buf_; | 52 scoped_refptr<IOBuffer> buf_; |
53 size_t buf_len_; | 53 size_t buf_len_; |
54 | 54 |
55 // Iterator to the upload element to be written to the send buffer next. | 55 // Iterator to the upload element to be written to the send buffer next. |
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73 | 73 |
74 // Whether there is no data left to read. | 74 // Whether there is no data left to read. |
75 bool eof_; | 75 bool eof_; |
76 | 76 |
77 DISALLOW_EVIL_CONSTRUCTORS(UploadDataStream); | 77 DISALLOW_EVIL_CONSTRUCTORS(UploadDataStream); |
78 }; | 78 }; |
79 | 79 |
80 } // namespace net | 80 } // namespace net |
81 | 81 |
82 #endif // NET_BASE_UPLOAD_DATA_STREAM_H_ | 82 #endif // NET_BASE_UPLOAD_DATA_STREAM_H_ |
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