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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 // SdchFilter applies open_vcdiff content decoding to a datastream. | 5 // SdchFilter applies open_vcdiff content decoding to a datastream. |
6 // This decoding uses a pre-cached dictionary of text fragments to decode | 6 // This decoding uses a pre-cached dictionary of text fragments to decode |
7 // (expand) the stream back to its original contents. | 7 // (expand) the stream back to its original contents. |
8 // | 8 // |
9 // This SdchFilter internally uses open_vcdiff/vcdec library to do decoding. | 9 // This SdchFilter internally uses open_vcdiff/vcdec library to do decoding. |
10 // | 10 // |
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58 explicit SdchFilter(const FilterContext& filter_context); | 58 explicit SdchFilter(const FilterContext& filter_context); |
59 friend class Filter; | 59 friend class Filter; |
60 | 60 |
61 // Identify the suggested dictionary, and initialize underlying decompressor. | 61 // Identify the suggested dictionary, and initialize underlying decompressor. |
62 Filter::FilterStatus InitializeDictionary(); | 62 Filter::FilterStatus InitializeDictionary(); |
63 | 63 |
64 // Move data that was internally buffered (after decompression) to the | 64 // Move data that was internally buffered (after decompression) to the |
65 // specified dest_buffer. | 65 // specified dest_buffer. |
66 int OutputBufferExcess(char* const dest_buffer, size_t available_space); | 66 int OutputBufferExcess(char* const dest_buffer, size_t available_space); |
67 | 67 |
| 68 // Add SDCH Problem to net-log and record histogram. |
| 69 void LogSdchProblem(SdchProblemCodes problem); |
| 70 |
68 // Context data from the owner of this filter. | 71 // Context data from the owner of this filter. |
69 const FilterContext& filter_context_; | 72 const FilterContext& filter_context_; |
70 | 73 |
71 // Tracks the status of decoding. | 74 // Tracks the status of decoding. |
72 // This variable is initialized by InitDecoding and updated only by | 75 // This variable is initialized by InitDecoding and updated only by |
73 // ReadFilteredData. | 76 // ReadFilteredData. |
74 DecodingStatus decoding_status_; | 77 DecodingStatus decoding_status_; |
75 | 78 |
76 // The underlying decoder that processes data. | 79 // The underlying decoder that processes data. |
77 // This data structure is initialized by InitDecoding and updated in | 80 // This data structure is initialized by InitDecoding and updated in |
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126 // To facilitate error recovery, allow filter to know if content is text/html | 129 // To facilitate error recovery, allow filter to know if content is text/html |
127 // by checking within this mime type (we may do a meta-refresh via html). | 130 // by checking within this mime type (we may do a meta-refresh via html). |
128 std::string mime_type_; | 131 std::string mime_type_; |
129 | 132 |
130 DISALLOW_COPY_AND_ASSIGN(SdchFilter); | 133 DISALLOW_COPY_AND_ASSIGN(SdchFilter); |
131 }; | 134 }; |
132 | 135 |
133 } // namespace net | 136 } // namespace net |
134 | 137 |
135 #endif // NET_FILTER_SDCH_FILTER_H_ | 138 #endif // NET_FILTER_SDCH_FILTER_H_ |
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