Page Speed Optimization Libraries
1.8.31.3
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00001 /* 00002 * Copyright 2013 Google Inc. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http:///www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00034 00035 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_FINDER_SUPPORT_UTIL_H_ 00036 #define NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_FINDER_SUPPORT_UTIL_H_ 00037 00038 #include "net/instaweb/rewriter/critical_keys.pb.h" 00039 #include "net/instaweb/util/public/basictypes.h" 00040 #include "net/instaweb/util/public/property_cache.h" 00041 #include "net/instaweb/util/public/string.h" 00042 #include "net/instaweb/util/public/string_util.h" 00043 #include "net/instaweb/util/public/timer.h" 00044 00045 namespace net_instaweb { 00046 00050 const int64 kBeaconTimeoutIntervalMs = Timer::kMinuteMs; 00051 00054 const int64 kHighFreqBeaconCount = 3; 00055 00061 const int64 kLowFreqBeaconMult = 100; 00062 00066 const int64 kNonceExpirationLimit = 5; 00067 00068 class MessageHandler; 00069 class NonceGenerator; 00070 class RewriteDriver; 00071 00072 enum BeaconStatus { 00073 kDoNotBeacon, 00074 kBeaconNoNonce, 00075 kBeaconWithNonce 00076 }; 00077 00078 struct BeaconMetadata { 00079 BeaconMetadata() : status(kDoNotBeacon) { } 00080 BeaconStatus status; 00081 GoogleString nonce; 00082 }; 00083 00089 bool ValidateAndExpireNonce(int64 now_ms, StringPiece nonce, 00090 CriticalKeys* critical_keys); 00091 00098 void GetCriticalKeysFromProto(int64 support_percentage, 00099 const CriticalKeys& critical_keys, 00100 StringSet* keys); 00101 00107 void UpdateCriticalKeys(bool require_prior_support, 00108 const StringSet& new_set, int support_value, 00109 CriticalKeys* critical_keys); 00110 00111 bool ShouldBeacon(const CriticalKeys& proto, const RewriteDriver& driver); 00112 00120 void WriteCriticalKeysToPropertyCache( 00121 const StringSet& new_keys, StringPiece nonce, int support_interval, 00122 bool should_replace_prior_result, bool require_prior_support, 00123 StringPiece property_name, const PropertyCache* cache, 00124 const PropertyCache::Cohort* cohort, AbstractPropertyPage* page, 00125 MessageHandler* message_handler, Timer* timer); 00126 00140 void PrepareForBeaconInsertionHelper(CriticalKeys* proto, 00141 NonceGenerator* nonce_generator, 00142 RewriteDriver* driver, 00143 bool using_candidate_key_detection, 00144 BeaconMetadata* result); 00145 00151 bool UpdateCandidateKeys(const StringSet& keys, CriticalKeys* proto, 00152 bool clear_rebeacon_timestamp); 00153 00156 inline bool IsBeaconDataAvailable(const CriticalKeys& proto) { 00157 return (proto.valid_beacons_received() > 0); 00158 } 00159 00160 } 00161 00162 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_FINDER_SUPPORT_UTIL_H_