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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 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 #include "base/scoped_ptr.h" | 9 #include "base/scoped_ptr.h" |
| 10 #include "net/base/upload_data.h" | 10 #include "net/base/upload_data.h" |
| 11 | 11 |
| 12 namespace net { | 12 namespace net { |
| 13 | 13 |
| 14 class FileStream; | 14 class FileStream; |
| 15 class IOBuffer; | 15 class IOBuffer; |
| 16 | 16 |
| 17 class UploadDataStream { | 17 class UploadDataStream { |
| 18 public: | 18 public: |
| 19 ~UploadDataStream(); |
| 20 |
| 19 // Returns a new instance of UploadDataStream if it can be created and | 21 // Returns a new instance of UploadDataStream if it can be created and |
| 20 // initialized successfully. If not, NULL will be returned and the error | 22 // initialized successfully. If not, NULL will be returned and the error |
| 21 // code will be set if the output parameter error_code is not empty. | 23 // code will be set if the output parameter error_code is not empty. |
| 22 static UploadDataStream* Create(UploadData* data, int* error_code); | 24 static UploadDataStream* Create(UploadData* data, int* error_code); |
| 23 | 25 |
| 24 ~UploadDataStream(); | |
| 25 | |
| 26 // Returns the stream's buffer and buffer length. | 26 // Returns the stream's buffer and buffer length. |
| 27 IOBuffer* buf() const { return buf_; } | 27 IOBuffer* buf() const { return buf_; } |
| 28 size_t buf_len() const { return buf_len_; } | 28 size_t buf_len() const { return buf_len_; } |
| 29 | 29 |
| 30 // Call to indicate that a portion of the stream's buffer was consumed. This | 30 // Call to indicate that a portion of the stream's buffer was consumed. This |
| 31 // call modifies the stream's buffer so that it contains the next segment of | 31 // call modifies the stream's buffer so that it contains the next segment of |
| 32 // the upload data to be consumed. | 32 // the upload data to be consumed. |
| 33 void DidConsume(size_t num_bytes); | 33 void DidConsume(size_t num_bytes); |
| 34 | 34 |
| 35 // Returns the total size of the data stream and the current position. | 35 // Returns the total size of the data stream and the current position. |
| 36 // size() is not to be used to determine whether the stream has ended | 36 // size() is not to be used to determine whether the stream has ended |
| 37 // because it is possible for the stream to end before its size is reached, | 37 // because it is possible for the stream to end before its size is reached, |
| 38 // for example, if the file is truncated. | 38 // for example, if the file is truncated. |
| 39 uint64 size() const { return total_size_; } | 39 uint64 size() const { return total_size_; } |
| 40 uint64 position() const { return current_position_; } | 40 uint64 position() const { return current_position_; } |
| 41 | 41 |
| 42 // Returns whether there is no more data to read, regardless of whether | 42 // Returns whether there is no more data to read, regardless of whether |
| 43 // position < size. | 43 // position < size. |
| 44 bool eof() const { return eof_; } | 44 bool eof() const { return eof_; } |
| 45 | 45 |
| 46 private: | 46 private: |
| 47 enum { kBufSize = 16384 }; |
| 48 |
| 47 // Protects from public access since now we have a static creator function | 49 // Protects from public access since now we have a static creator function |
| 48 // which will do both creation and initialization and might return an error. | 50 // which will do both creation and initialization and might return an error. |
| 49 explicit UploadDataStream(UploadData* data); | 51 explicit UploadDataStream(UploadData* data); |
| 50 | 52 |
| 51 // Fills the buffer with any remaining data and sets eof_ if there was nothing | 53 // Fills the buffer with any remaining data and sets eof_ if there was nothing |
| 52 // left to fill the buffer with. | 54 // left to fill the buffer with. |
| 53 // Returns OK if the operation succeeds. Otherwise error code is returned. | 55 // Returns OK if the operation succeeds. Otherwise error code is returned. |
| 54 int FillBuf(); | 56 int FillBuf(); |
| 55 | 57 |
| 56 UploadData* data_; | 58 UploadData* data_; |
| 57 | 59 |
| 58 // This buffer is filled with data to be uploaded. The data to be sent is | 60 // This buffer is filled with data to be uploaded. The data to be sent is |
| 59 // always at the front of the buffer. If we cannot send all of the buffer at | 61 // always at the front of the buffer. If we cannot send all of the buffer at |
| 60 // once, then we memmove the remaining portion and back-fill the buffer for | 62 // once, then we memmove the remaining portion and back-fill the buffer for |
| 61 // the next "write" call. buf_len_ indicates how much data is in the buffer. | 63 // the next "write" call. buf_len_ indicates how much data is in the buffer. |
| 62 enum { kBufSize = 16384 }; | |
| 63 scoped_refptr<IOBuffer> buf_; | 64 scoped_refptr<IOBuffer> buf_; |
| 64 size_t buf_len_; | 65 size_t buf_len_; |
| 65 | 66 |
| 66 // Iterator to the upload element to be written to the send buffer next. | 67 // Iterator to the upload element to be written to the send buffer next. |
| 67 std::vector<UploadData::Element>::iterator next_element_; | 68 std::vector<UploadData::Element>::iterator next_element_; |
| 68 | 69 |
| 69 // The byte offset into next_element_'s data buffer if the next element is | 70 // The byte offset into next_element_'s data buffer if the next element is |
| 70 // a TYPE_BYTES element. | 71 // a TYPE_BYTES element. |
| 71 size_t next_element_offset_; | 72 size_t next_element_offset_; |
| 72 | 73 |
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| 84 | 85 |
| 85 // Whether there is no data left to read. | 86 // Whether there is no data left to read. |
| 86 bool eof_; | 87 bool eof_; |
| 87 | 88 |
| 88 DISALLOW_COPY_AND_ASSIGN(UploadDataStream); | 89 DISALLOW_COPY_AND_ASSIGN(UploadDataStream); |
| 89 }; | 90 }; |
| 90 | 91 |
| 91 } // namespace net | 92 } // namespace net |
| 92 | 93 |
| 93 #endif // NET_BASE_UPLOAD_DATA_STREAM_H_ | 94 #endif // NET_BASE_UPLOAD_DATA_STREAM_H_ |
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