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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 // Provides global database of differential decompression dictionaries for the | 5 // Provides global database of differential decompression dictionaries for the |
| 6 // SDCH filter (processes sdch enconded content). | 6 // SDCH filter (processes sdch enconded content). |
| 7 | 7 |
| 8 // Exactly one instance of SdchManager is built, and all references are made | 8 // Exactly one instance of SdchManager is built, and all references are made |
| 9 // into that collection. | 9 // into that collection. |
| 10 // | 10 // |
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| 64 // The Cancel() method is called to cancel all pending dictionary fetches. | 64 // The Cancel() method is called to cancel all pending dictionary fetches. |
| 65 // This is used for implementation of ClearData() below. | 65 // This is used for implementation of ClearData() below. |
| 66 virtual void Cancel() = 0; | 66 virtual void Cancel() = 0; |
| 67 | 67 |
| 68 private: | 68 private: |
| 69 DISALLOW_COPY_AND_ASSIGN(SdchFetcher); | 69 DISALLOW_COPY_AND_ASSIGN(SdchFetcher); |
| 70 }; | 70 }; |
| 71 | 71 |
| 72 //------------------------------------------------------------------------------ | 72 //------------------------------------------------------------------------------ |
| 73 | 73 |
| 74 class NET_EXPORT SdchManager | 74 class NET_EXPORT SdchManager : public SdchFetcher::Delegate, |
| 75 : public SdchFetcher::Delegate, | 75 public NON_EXPORTED_BASE(base::NonThreadSafe) { |
| 76 public NON_EXPORTED_BASE(base::NonThreadSafe) { | |
| 77 public: | 76 public: |
| 78 // A list of errors that appeared and were either resolved, or used to turn | 77 // A list of errors that appeared and were either resolved, or used to turn |
| 79 // off sdch encoding. | 78 // off sdch encoding. |
| 80 enum ProblemCodes { | 79 enum ProblemCodes { |
| 81 MIN_PROBLEM_CODE, | 80 MIN_PROBLEM_CODE, |
| 82 | 81 |
| 83 // Content-encoding correction problems. | 82 // Content-encoding correction problems. |
| 84 ADDED_CONTENT_ENCODING = 1, | 83 ADDED_CONTENT_ENCODING = 1, |
| 85 FIXED_CONTENT_ENCODING = 2, | 84 FIXED_CONTENT_ENCODING = 2, |
| 86 FIXED_CONTENT_ENCODINGS = 3, | 85 FIXED_CONTENT_ENCODINGS = 3, |
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| 113 DICTIONARY_DOMAIN_NOT_MATCHING_SOURCE_URL = 24, | 112 DICTIONARY_DOMAIN_NOT_MATCHING_SOURCE_URL = 24, |
| 114 DICTIONARY_PORT_NOT_MATCHING_SOURCE_URL = 25, | 113 DICTIONARY_PORT_NOT_MATCHING_SOURCE_URL = 25, |
| 115 DICTIONARY_HAS_NO_TEXT = 26, | 114 DICTIONARY_HAS_NO_TEXT = 26, |
| 116 DICTIONARY_REFERER_URL_HAS_DOT_IN_PREFIX = 27, | 115 DICTIONARY_REFERER_URL_HAS_DOT_IN_PREFIX = 27, |
| 117 | 116 |
| 118 // Dictionary loading problems. | 117 // Dictionary loading problems. |
| 119 DICTIONARY_LOAD_ATTEMPT_FROM_DIFFERENT_HOST = 30, | 118 DICTIONARY_LOAD_ATTEMPT_FROM_DIFFERENT_HOST = 30, |
| 120 DICTIONARY_SELECTED_FOR_SSL = 31, | 119 DICTIONARY_SELECTED_FOR_SSL = 31, |
| 121 DICTIONARY_ALREADY_LOADED = 32, | 120 DICTIONARY_ALREADY_LOADED = 32, |
| 122 DICTIONARY_SELECTED_FROM_NON_HTTP = 33, | 121 DICTIONARY_SELECTED_FROM_NON_HTTP = 33, |
| 123 DICTIONARY_IS_TOO_LARGE= 34, | 122 DICTIONARY_IS_TOO_LARGE = 34, |
| 124 DICTIONARY_COUNT_EXCEEDED = 35, | 123 DICTIONARY_COUNT_EXCEEDED = 35, |
| 125 DICTIONARY_ALREADY_SCHEDULED_TO_DOWNLOAD = 36, | 124 DICTIONARY_ALREADY_SCHEDULED_TO_DOWNLOAD = 36, |
| 126 DICTIONARY_ALREADY_TRIED_TO_DOWNLOAD = 37, | 125 DICTIONARY_ALREADY_TRIED_TO_DOWNLOAD = 37, |
| 127 DICTIONARY_FETCH_READ_FAILED = 38, | 126 DICTIONARY_FETCH_READ_FAILED = 38, |
| 128 | 127 |
| 129 // Failsafe hack. | 128 // Failsafe hack. |
| 130 ATTEMPT_TO_DECODE_NON_HTTP_DATA = 40, | 129 ATTEMPT_TO_DECODE_NON_HTTP_DATA = 40, |
| 131 | 130 |
| 132 | |
| 133 // Content-Encoding problems detected, with no action taken. | 131 // Content-Encoding problems detected, with no action taken. |
| 134 MULTIENCODING_FOR_NON_SDCH_REQUEST = 50, | 132 MULTIENCODING_FOR_NON_SDCH_REQUEST = 50, |
| 135 SDCH_CONTENT_ENCODE_FOR_NON_SDCH_REQUEST = 51, | 133 SDCH_CONTENT_ENCODE_FOR_NON_SDCH_REQUEST = 51, |
| 136 | 134 |
| 137 // Dictionary manager issues. | 135 // Dictionary manager issues. |
| 138 DOMAIN_BLACKLIST_INCLUDES_TARGET = 61, | 136 DOMAIN_BLACKLIST_INCLUDES_TARGET = 61, |
| 139 | 137 |
| 140 // Problematic decode recovery methods. | 138 // Problematic decode recovery methods. |
| 141 META_REFRESH_RECOVERY = 70, // Dictionary not found. | 139 META_REFRESH_RECOVERY = 70, // Dictionary not found. |
| 142 // defunct = 71, // Almost the same as META_REFRESH_UNSUPPORTED. | 140 // defunct = 71, // Almost the same as META_REFRESH_UNSUPPORTED. |
| 143 // defunct = 72, // Almost the same as CACHED_META_REFRESH_UNSUPPORTED. | 141 // defunct = 72, // Almost the same as CACHED_META_REFRESH_UNSUPPORTED. |
| 144 // defunct = 73, // PASSING_THROUGH_NON_SDCH plus | 142 // defunct = 73, // PASSING_THROUGH_NON_SDCH plus |
| 145 // RESPONSE_TENTATIVE_SDCH in ../filter/sdch_filter.cc. | 143 // RESPONSE_TENTATIVE_SDCH in ../filter/sdch_filter.cc. |
|
Ryan Sleevi
2014/10/11 02:04:47
BUG in clang-format
jkarlin
2014/10/16 00:19:32
You think? It seems like it's asking a bit much t
jkarlin
2014/11/11 19:01:44
Fixed by adding whitespace.
| |
| 146 META_REFRESH_UNSUPPORTED = 74, // Unrecoverable error. | 144 META_REFRESH_UNSUPPORTED = 74, // Unrecoverable error. |
| 147 CACHED_META_REFRESH_UNSUPPORTED = 75, // As above, but pulled from cache. | 145 CACHED_META_REFRESH_UNSUPPORTED = 75, // As above, but pulled from cache. |
| 148 PASSING_THROUGH_NON_SDCH = 76, // Tagged sdch but missing dictionary-hash. | 146 PASSING_THROUGH_NON_SDCH = 76, // Tagged sdch but missing dictionary-hash. |
| 149 INCOMPLETE_SDCH_CONTENT = 77, // Last window was not completely decoded. | 147 INCOMPLETE_SDCH_CONTENT = 77, // Last window was not completely decoded. |
| 150 PASS_THROUGH_404_CODE = 78, // URL not found message passing through. | 148 PASS_THROUGH_404_CODE = 78, // URL not found message passing through. |
| 151 | 149 |
| 152 // This next report is very common, and not really an error scenario, but | 150 // This next report is very common, and not really an error scenario, but |
| 153 // it exercises the error recovery logic. | 151 // it exercises the error recovery logic. |
| 154 PASS_THROUGH_OLD_CACHED = 79, // Back button got pre-SDCH cached content. | 152 PASS_THROUGH_OLD_CACHED = 79, // Back button got pre-SDCH cached content. |
| 155 | 153 |
| 156 // Common decoded recovery methods. | 154 // Common decoded recovery methods. |
| 157 META_REFRESH_CACHED_RECOVERY = 80, // Probably startup tab loading. | 155 META_REFRESH_CACHED_RECOVERY = 80, // Probably startup tab loading. |
| 158 // defunct = 81, // Now tracked by ResponseCorruptionDetectionCause histo. | 156 // defunct = 81, // Now tracked by ResponseCorruptionDetectionCause histo. |
| 159 | 157 |
| 160 // Non SDCH problems, only accounted for to make stat counting complete | 158 // Non SDCH problems, only accounted for to make stat counting complete |
| 161 // (i.e., be able to be sure all dictionary advertisements are accounted | 159 // (i.e., be able to be sure all dictionary advertisements are accounted |
| 162 // for). | 160 // for). |
| 163 | 161 |
| 164 UNFLUSHED_CONTENT = 90, // Possible error in filter chaining. | 162 UNFLUSHED_CONTENT = 90, // Possible error in filter chaining. |
| 165 // defunct = 91, // MISSING_TIME_STATS (Should never happen.) | 163 // defunct = 91, // MISSING_TIME_STATS (Should never happen.) |
| 166 CACHE_DECODED = 92, // No timing stats recorded. | 164 CACHE_DECODED = 92, // No timing stats recorded. |
|
Ryan Sleevi
2014/10/11 02:04:47
bug in clang-format
jkarlin
2014/10/16 00:19:32
ditto
jkarlin
2014/11/11 19:01:44
It would be nice if it lined up better but it seem
| |
| 167 // defunct = 93, // OVER_10_MINUTES (No timing stats recorded.) | 165 // defunct = 93, // OVER_10_MINUTES (No timing stats recorded.) |
| 168 UNINITIALIZED = 94, // Filter never even got initialized. | 166 UNINITIALIZED = 94, // Filter never even got initialized. |
| 169 PRIOR_TO_DICTIONARY = 95, // We hadn't even parsed a dictionary selector. | 167 PRIOR_TO_DICTIONARY = 95, // We hadn't even parsed a dictionary selector. |
| 170 DECODE_ERROR = 96, // Something went wrong during decode. | 168 DECODE_ERROR = 96, // Something went wrong during decode. |
| 171 | 169 |
| 172 // Problem during the latency test. | 170 // Problem during the latency test. |
| 173 LATENCY_TEST_DISALLOWED = 100, // SDCH now failing, but it worked before! | 171 LATENCY_TEST_DISALLOWED = 100, // SDCH now failing, but it worked before! |
| 174 | 172 |
| 175 MAX_PROBLEM_CODE // Used to bound histogram. | 173 MAX_PROBLEM_CODE // Used to bound histogram. |
| 176 }; | 174 }; |
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| 207 | 205 |
| 208 const GURL& url() const { return url_; } | 206 const GURL& url() const { return url_; } |
| 209 const std::string& client_hash() const { return client_hash_; } | 207 const std::string& client_hash() const { return client_hash_; } |
| 210 | 208 |
| 211 // Security method to check if we can advertise this dictionary for use | 209 // Security method to check if we can advertise this dictionary for use |
| 212 // if the |target_url| returns SDCH compressed data. | 210 // if the |target_url| returns SDCH compressed data. |
| 213 bool CanAdvertise(const GURL& target_url); | 211 bool CanAdvertise(const GURL& target_url); |
| 214 | 212 |
| 215 // Security methods to check if we can establish a new dictionary with the | 213 // Security methods to check if we can establish a new dictionary with the |
| 216 // given data, that arrived in response to get of dictionary_url. | 214 // given data, that arrived in response to get of dictionary_url. |
| 217 static bool CanSet(const std::string& domain, const std::string& path, | 215 static bool CanSet(const std::string& domain, |
| 218 const std::set<int>& ports, const GURL& dictionary_url); | 216 const std::string& path, |
| 217 const std::set<int>& ports, | |
| 218 const GURL& dictionary_url); | |
| 219 | 219 |
| 220 // Security method to check if we can use a dictionary to decompress a | 220 // Security method to check if we can use a dictionary to decompress a |
| 221 // target that arrived with a reference to this dictionary. | 221 // target that arrived with a reference to this dictionary. |
| 222 bool CanUse(const GURL& referring_url); | 222 bool CanUse(const GURL& referring_url); |
| 223 | 223 |
| 224 // Compare paths to see if they "match" for dictionary use. | 224 // Compare paths to see if they "match" for dictionary use. |
| 225 static bool PathMatch(const std::string& path, | 225 static bool PathMatch(const std::string& path, |
| 226 const std::string& restriction); | 226 const std::string& restriction); |
| 227 | 227 |
| 228 // Compare domains to see if the "match" for dictionary use. | 228 // Compare domains to see if the "match" for dictionary use. |
| 229 static bool DomainMatch(const GURL& url, const std::string& restriction); | 229 static bool DomainMatch(const GURL& url, const std::string& restriction); |
| 230 | 230 |
| 231 | |
| 232 // The actual text of the dictionary. | 231 // The actual text of the dictionary. |
| 233 std::string text_; | 232 std::string text_; |
| 234 | 233 |
| 235 // Part of the hash of text_ that the client uses to advertise the fact that | 234 // Part of the hash of text_ that the client uses to advertise the fact that |
| 236 // it has a specific dictionary pre-cached. | 235 // it has a specific dictionary pre-cached. |
| 237 std::string client_hash_; | 236 std::string client_hash_; |
| 238 | 237 |
| 239 // The GURL that arrived with the text_ in a URL request to specify where | 238 // The GURL that arrived with the text_ in a URL request to specify where |
| 240 // this dictionary may be used. | 239 // this dictionary may be used. |
| 241 const GURL url_; | 240 const GURL url_; |
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| 328 | 327 |
| 329 // Get list of available (pre-cached) dictionaries that we have already loaded | 328 // Get list of available (pre-cached) dictionaries that we have already loaded |
| 330 // into memory. The list is a comma separated list of (client) hashes per | 329 // into memory. The list is a comma separated list of (client) hashes per |
| 331 // the SDCH spec. | 330 // the SDCH spec. |
| 332 void GetAvailDictionaryList(const GURL& target_url, std::string* list); | 331 void GetAvailDictionaryList(const GURL& target_url, std::string* list); |
| 333 | 332 |
| 334 // Construct the pair of hashes for client and server to identify an SDCH | 333 // Construct the pair of hashes for client and server to identify an SDCH |
| 335 // dictionary. This is only made public to facilitate unit testing, but is | 334 // dictionary. This is only made public to facilitate unit testing, but is |
| 336 // otherwise private | 335 // otherwise private |
| 337 static void GenerateHash(const std::string& dictionary_text, | 336 static void GenerateHash(const std::string& dictionary_text, |
| 338 std::string* client_hash, std::string* server_hash); | 337 std::string* client_hash, |
| 338 std::string* server_hash); | |
| 339 | 339 |
| 340 // For Latency testing only, we need to know if we've succeeded in doing a | 340 // For Latency testing only, we need to know if we've succeeded in doing a |
| 341 // round trip before starting our comparative tests. If ever we encounter | 341 // round trip before starting our comparative tests. If ever we encounter |
| 342 // problems with SDCH, we opt-out of the test unless/until we perform a | 342 // problems with SDCH, we opt-out of the test unless/until we perform a |
| 343 // complete SDCH decoding. | 343 // complete SDCH decoding. |
| 344 bool AllowLatencyExperiment(const GURL& url) const; | 344 bool AllowLatencyExperiment(const GURL& url) const; |
| 345 | 345 |
| 346 void SetAllowLatencyExperiment(const GURL& url, bool enable); | 346 void SetAllowLatencyExperiment(const GURL& url, bool enable); |
| 347 | 347 |
| 348 int GetFetchesCountForTesting() const { | 348 int GetFetchesCountForTesting() const { return fetches_count_for_testing_; } |
| 349 return fetches_count_for_testing_; | |
| 350 } | |
| 351 | 349 |
| 352 // Implementation of SdchFetcher::Delegate. | 350 // Implementation of SdchFetcher::Delegate. |
| 353 | 351 |
| 354 // Add an SDCH dictionary to our list of availible | 352 // Add an SDCH dictionary to our list of availible |
| 355 // dictionaries. This addition will fail if addition is illegal | 353 // dictionaries. This addition will fail if addition is illegal |
| 356 // (data in the dictionary is not acceptable from the | 354 // (data in the dictionary is not acceptable from the |
| 357 // dictionary_url; dictionary already added, etc.). | 355 // dictionary_url; dictionary already added, etc.). |
| 358 virtual void AddSdchDictionary(const std::string& dictionary_text, | 356 virtual void AddSdchDictionary(const std::string& dictionary_text, |
| 359 const GURL& dictionary_url) override; | 357 const GURL& dictionary_url) override; |
| 360 | 358 |
| 361 private: | 359 private: |
| 362 struct BlacklistInfo { | 360 struct BlacklistInfo { |
| 363 BlacklistInfo() | 361 BlacklistInfo() |
| 364 : count(0), | 362 : count(0), exponential_count(0), reason(MIN_PROBLEM_CODE) {} |
| 365 exponential_count(0), | |
| 366 reason(MIN_PROBLEM_CODE) {} | |
| 367 | 363 |
| 368 int count; // # of times to refuse SDCH advertisement. | 364 int count; // # of times to refuse SDCH advertisement. |
| 369 int exponential_count; // Current exponential backoff ratchet. | 365 int exponential_count; // Current exponential backoff ratchet. |
| 370 ProblemCodes reason; // Why domain was blacklisted. | 366 ProblemCodes reason; // Why domain was blacklisted. |
| 371 | |
| 372 }; | 367 }; |
| 373 typedef std::map<std::string, BlacklistInfo> DomainBlacklistInfo; | 368 typedef std::map<std::string, BlacklistInfo> DomainBlacklistInfo; |
| 374 typedef std::set<std::string> ExperimentSet; | 369 typedef std::set<std::string> ExperimentSet; |
| 375 | 370 |
| 376 // A map of dictionaries info indexed by the hash that the server provides. | 371 // A map of dictionaries info indexed by the hash that the server provides. |
| 377 typedef std::map<std::string, scoped_refptr<Dictionary> > DictionaryMap; | 372 typedef std::map<std::string, scoped_refptr<Dictionary> > DictionaryMap; |
| 378 | 373 |
| 379 // Support SDCH compression, by advertising in headers. | 374 // Support SDCH compression, by advertising in headers. |
| 380 static bool g_sdch_enabled_; | 375 static bool g_sdch_enabled_; |
| 381 | 376 |
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| 399 ExperimentSet allow_latency_experiment_; | 394 ExperimentSet allow_latency_experiment_; |
| 400 | 395 |
| 401 int fetches_count_for_testing_; | 396 int fetches_count_for_testing_; |
| 402 | 397 |
| 403 DISALLOW_COPY_AND_ASSIGN(SdchManager); | 398 DISALLOW_COPY_AND_ASSIGN(SdchManager); |
| 404 }; | 399 }; |
| 405 | 400 |
| 406 } // namespace net | 401 } // namespace net |
| 407 | 402 |
| 408 #endif // NET_BASE_SDCH_MANAGER_H_ | 403 #endif // NET_BASE_SDCH_MANAGER_H_ |
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