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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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_HTTP_PARTIAL_DATA_H_ | 5 #ifndef NET_HTTP_PARTIAL_DATA_H_ |
| 6 #define NET_HTTP_PARTIAL_DATA_H_ | 6 #define NET_HTTP_PARTIAL_DATA_H_ |
| 7 | 7 |
| 8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
| 9 #include "net/base/completion_callback.h" | 9 #include "net/base/completion_callback.h" |
| 10 #include "net/http/http_byte_range.h" | 10 #include "net/http/http_byte_range.h" |
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| 65 bool IsCurrentRangeCached() const; | 65 bool IsCurrentRangeCached() const; |
| 66 | 66 |
| 67 // Returns true if the current range is the last one needed to fulfill the | 67 // Returns true if the current range is the last one needed to fulfill the |
| 68 // user's request. | 68 // user's request. |
| 69 bool IsLastRange() const; | 69 bool IsLastRange() const; |
| 70 | 70 |
| 71 // Extracts info from headers already stored in the cache. Returns false if | 71 // Extracts info from headers already stored in the cache. Returns false if |
| 72 // there is any problem with the headers. |truncated| should be true if we | 72 // there is any problem with the headers. |truncated| should be true if we |
| 73 // have an incomplete 200 entry. | 73 // have an incomplete 200 entry. |
| 74 bool UpdateFromStoredHeaders(const HttpResponseHeaders* headers, | 74 bool UpdateFromStoredHeaders(const HttpResponseHeaders* headers, |
| 75 disk_cache::Entry* entry, bool truncated); | 75 disk_cache::Entry* entry, |
| 76 bool truncated); |
| 76 | 77 |
| 77 // Sets the byte current range to start again at zero (for a truncated entry). | 78 // Sets the byte current range to start again at zero (for a truncated entry). |
| 78 void SetRangeToStartDownload(); | 79 void SetRangeToStartDownload(); |
| 79 | 80 |
| 80 // Returns true if the requested range is valid given the stored data. | 81 // Returns true if the requested range is valid given the stored data. |
| 81 bool IsRequestedRangeOK(); | 82 bool IsRequestedRangeOK(); |
| 82 | 83 |
| 83 // Returns true if the response headers match what we expect, false otherwise. | 84 // Returns true if the response headers match what we expect, false otherwise. |
| 84 bool ResponseHeadersOK(const HttpResponseHeaders* headers); | 85 bool ResponseHeadersOK(const HttpResponseHeaders* headers); |
| 85 | 86 |
| 86 // Fixes the response headers to include the right content length and range. | 87 // Fixes the response headers to include the right content length and range. |
| 87 // |success| is the result of the whole request so if it's false, we'll change | 88 // |success| is the result of the whole request so if it's false, we'll change |
| 88 // the result code to be 416. | 89 // the result code to be 416. |
| 89 void FixResponseHeaders(HttpResponseHeaders* headers, bool success); | 90 void FixResponseHeaders(HttpResponseHeaders* headers, bool success); |
| 90 | 91 |
| 91 // Fixes the content length that we want to store in the cache. | 92 // Fixes the content length that we want to store in the cache. |
| 92 void FixContentLength(HttpResponseHeaders* headers); | 93 void FixContentLength(HttpResponseHeaders* headers); |
| 93 | 94 |
| 94 // Reads up to |data_len| bytes from the cache and stores them in the provided | 95 // Reads up to |data_len| bytes from the cache and stores them in the provided |
| 95 // buffer (|data|). Basically, this is just a wrapper around the API of the | 96 // buffer (|data|). Basically, this is just a wrapper around the API of the |
| 96 // cache that provides the right arguments for the current range. When the IO | 97 // cache that provides the right arguments for the current range. When the IO |
| 97 // operation completes, OnCacheReadCompleted() must be called with the result | 98 // operation completes, OnCacheReadCompleted() must be called with the result |
| 98 // of the operation. | 99 // of the operation. |
| 99 int CacheRead(disk_cache::Entry* entry, IOBuffer* data, int data_len, | 100 int CacheRead(disk_cache::Entry* entry, |
| 101 IOBuffer* data, |
| 102 int data_len, |
| 100 const net::CompletionCallback& callback); | 103 const net::CompletionCallback& callback); |
| 101 | 104 |
| 102 // Writes |data_len| bytes to cache. This is basically a wrapper around the | 105 // Writes |data_len| bytes to cache. This is basically a wrapper around the |
| 103 // API of the cache that provides the right arguments for the current range. | 106 // API of the cache that provides the right arguments for the current range. |
| 104 int CacheWrite(disk_cache::Entry* entry, IOBuffer* data, int data_len, | 107 int CacheWrite(disk_cache::Entry* entry, |
| 108 IOBuffer* data, |
| 109 int data_len, |
| 105 const net::CompletionCallback& callback); | 110 const net::CompletionCallback& callback); |
| 106 | 111 |
| 107 // This method should be called when CacheRead() finishes the read, to update | 112 // This method should be called when CacheRead() finishes the read, to update |
| 108 // the internal state about the current range. | 113 // the internal state about the current range. |
| 109 void OnCacheReadCompleted(int result); | 114 void OnCacheReadCompleted(int result); |
| 110 | 115 |
| 111 // This method should be called after receiving data from the network, to | 116 // This method should be called after receiving data from the network, to |
| 112 // update the internal state about the current range. | 117 // update the internal state about the current range. |
| 113 void OnNetworkReadCompleted(int result); | 118 void OnNetworkReadCompleted(int result); |
| 114 | 119 |
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| 125 int64 current_range_start_; | 130 int64 current_range_start_; |
| 126 int64 cached_start_; | 131 int64 cached_start_; |
| 127 int64 resource_size_; | 132 int64 resource_size_; |
| 128 int cached_min_len_; | 133 int cached_min_len_; |
| 129 HttpByteRange byte_range_; // The range requested by the user. | 134 HttpByteRange byte_range_; // The range requested by the user. |
| 130 // The clean set of extra headers (no ranges). | 135 // The clean set of extra headers (no ranges). |
| 131 HttpRequestHeaders extra_headers_; | 136 HttpRequestHeaders extra_headers_; |
| 132 bool range_present_; // True if next range entry is already stored. | 137 bool range_present_; // True if next range entry is already stored. |
| 133 bool final_range_; | 138 bool final_range_; |
| 134 bool sparse_entry_; | 139 bool sparse_entry_; |
| 135 bool truncated_; // We have an incomplete 200 stored. | 140 bool truncated_; // We have an incomplete 200 stored. |
| 136 bool initial_validation_; // Only used for truncated entries. | 141 bool initial_validation_; // Only used for truncated entries. |
| 137 Core* core_; | 142 Core* core_; |
| 138 CompletionCallback callback_; | 143 CompletionCallback callback_; |
| 139 | 144 |
| 140 DISALLOW_COPY_AND_ASSIGN(PartialData); | 145 DISALLOW_COPY_AND_ASSIGN(PartialData); |
| 141 }; | 146 }; |
| 142 | 147 |
| 143 } // namespace net | 148 } // namespace net |
| 144 | 149 |
| 145 #endif // NET_HTTP_PARTIAL_DATA_H_ | 150 #endif // NET_HTTP_PARTIAL_DATA_H_ |
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