Page Speed Optimization Libraries
1.7.30.2
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00001 /* 00002 * Copyright 2011 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 00018 00019 #ifndef NET_INSTAWEB_HTTP_PUBLIC_CACHE_URL_ASYNC_FETCHER_H_ 00020 #define NET_INSTAWEB_HTTP_PUBLIC_CACHE_URL_ASYNC_FETCHER_H_ 00021 00022 #include "net/instaweb/http/public/url_async_fetcher.h" 00023 #include "net/instaweb/util/public/basictypes.h" 00024 #include "net/instaweb/util/public/string.h" 00025 00026 namespace net_instaweb { 00027 00028 class AsyncFetch; 00029 class Hasher; 00030 class Histogram; 00031 class HTTPCache; 00032 class MessageHandler; 00033 class NamedLockManager; 00034 class Variable; 00035 00057 class CacheUrlAsyncFetcher : public UrlAsyncFetcher { 00058 public: 00061 class AsyncOpHooks { 00062 public: 00063 AsyncOpHooks() {} 00064 virtual ~AsyncOpHooks(); 00065 00067 virtual void StartAsyncOp() = 0; 00069 virtual void FinishAsyncOp() = 0; 00070 }; 00071 00073 CacheUrlAsyncFetcher(const Hasher* lock_hasher, 00074 NamedLockManager* lock_manager, 00075 HTTPCache* cache, 00076 AsyncOpHooks* async_op_hooks, 00077 UrlAsyncFetcher* fetcher) 00078 : lock_hasher_(lock_hasher), 00079 lock_manager_(lock_manager), 00080 http_cache_(cache), 00081 fetcher_(fetcher), 00082 async_op_hooks_(async_op_hooks), 00083 backend_first_byte_latency_(NULL), 00084 fallback_responses_served_(NULL), 00085 fallback_responses_served_while_revalidate_(NULL), 00086 num_conditional_refreshes_(NULL), 00087 num_proactively_freshen_user_facing_request_(NULL), 00088 respect_vary_(false), 00089 ignore_recent_fetch_failed_(false), 00090 serve_stale_if_fetch_error_(false), 00091 default_cache_html_(false), 00092 proactively_freshen_user_facing_request_(false), 00093 serve_stale_while_revalidate_threshold_sec_(0) { 00094 } 00095 virtual ~CacheUrlAsyncFetcher(); 00096 00097 virtual bool SupportsHttps() const { return fetcher_->SupportsHttps(); } 00098 00099 virtual void Fetch(const GoogleString& url, 00100 MessageHandler* message_handler, 00101 AsyncFetch* base_fetch); 00102 00105 static const int kNotInCacheStatus; 00106 00107 HTTPCache* http_cache() const { return http_cache_; } 00108 UrlAsyncFetcher* fetcher() const { return fetcher_; } 00109 00110 void set_backend_first_byte_latency_histogram(Histogram* x) { 00111 backend_first_byte_latency_ = x; 00112 } 00113 00114 Histogram* backend_first_byte_latency_histogram() const { 00115 return backend_first_byte_latency_; 00116 } 00117 00118 void set_fallback_responses_served(Variable* x) { 00119 fallback_responses_served_ = x; 00120 } 00121 00122 Variable* fallback_responses_served() const { 00123 return fallback_responses_served_; 00124 } 00125 00126 void set_fallback_responses_served_while_revalidate(Variable* x) { 00127 fallback_responses_served_while_revalidate_ = x; 00128 } 00129 00130 Variable* fallback_responses_served_while_revalidate() const { 00131 return fallback_responses_served_while_revalidate_; 00132 } 00133 00134 void set_num_conditional_refreshes(Variable* x) { 00135 num_conditional_refreshes_ = x; 00136 } 00137 00138 Variable* num_conditional_refreshes() const { 00139 return num_conditional_refreshes_; 00140 } 00141 00142 void set_num_proactively_freshen_user_facing_request(Variable* x) { 00143 num_proactively_freshen_user_facing_request_ = x; 00144 } 00145 00146 Variable* num_proactively_freshen_user_facing_request() const { 00147 return num_proactively_freshen_user_facing_request_; 00148 } 00149 00150 void set_respect_vary(bool x) { respect_vary_ = x; } 00151 bool respect_vary() const { return respect_vary_; } 00152 00153 void set_ignore_recent_fetch_failed(bool x) { 00154 ignore_recent_fetch_failed_ = x; 00155 } 00156 bool ignore_recent_fetch_failed() const { 00157 return ignore_recent_fetch_failed_; 00158 } 00159 00160 void set_serve_stale_if_fetch_error(bool x) { 00161 serve_stale_if_fetch_error_ = x; 00162 } 00163 00164 bool serve_stale_if_fetch_error() const { 00165 return serve_stale_if_fetch_error_; 00166 } 00167 00168 void set_serve_stale_while_revalidate_threshold_sec(int64 x) { 00169 serve_stale_while_revalidate_threshold_sec_ = x; 00170 } 00171 00172 int64 serve_stale_while_revalidate_threshold_sec() const { 00173 return serve_stale_while_revalidate_threshold_sec_; 00174 } 00175 00176 void set_default_cache_html(bool x) { default_cache_html_ = x; } 00177 bool default_cache_html() const { return default_cache_html_; } 00178 00179 void set_proactively_freshen_user_facing_request(bool x) { 00180 proactively_freshen_user_facing_request_ = x; 00181 } 00182 bool proactively_freshen_user_facing_request() const { 00183 return proactively_freshen_user_facing_request_; 00184 } 00185 00186 private: 00188 const Hasher* lock_hasher_; 00189 NamedLockManager* lock_manager_; 00190 HTTPCache* http_cache_; 00191 UrlAsyncFetcher* fetcher_; 00192 AsyncOpHooks* async_op_hooks_; 00193 00194 Histogram* backend_first_byte_latency_; 00195 Variable* fallback_responses_served_; 00196 Variable* fallback_responses_served_while_revalidate_; 00197 Variable* num_conditional_refreshes_; 00198 Variable* num_proactively_freshen_user_facing_request_; 00199 00200 bool respect_vary_; 00201 bool ignore_recent_fetch_failed_; 00202 bool serve_stale_if_fetch_error_; 00203 bool default_cache_html_; 00204 bool proactively_freshen_user_facing_request_; 00205 int64 serve_stale_while_revalidate_threshold_sec_; 00206 00207 DISALLOW_COPY_AND_ASSIGN(CacheUrlAsyncFetcher); 00208 }; 00209 00210 } 00211 00212 #endif ///< NET_INSTAWEB_HTTP_PUBLIC_CACHE_URL_ASYNC_FETCHER_H_