Page Speed Optimization Libraries
1.5.27.2
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00001 /* 00002 * Copyright 2010 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 00021 00022 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_OUTPUT_RESOURCE_H_ 00023 #define NET_INSTAWEB_REWRITER_PUBLIC_OUTPUT_RESOURCE_H_ 00024 00025 #include "base/logging.h" 00026 #include "net/instaweb/rewriter/public/output_resource_kind.h" 00027 #include "net/instaweb/rewriter/public/resource.h" 00028 #include "net/instaweb/rewriter/public/resource_namer.h" 00029 #include "net/instaweb/util/public/basictypes.h" 00030 #include "net/instaweb/util/public/queued_worker_pool.h" 00031 #include "net/instaweb/util/public/ref_counted_ptr.h" 00032 #include "net/instaweb/util/public/scoped_ptr.h" 00033 #include "net/instaweb/util/public/string.h" 00034 #include "net/instaweb/util/public/string_util.h" 00035 00036 namespace net_instaweb { 00037 00038 class CachedResult; 00039 class Function; 00040 class MessageHandler; 00041 class NamedLock; 00042 class ServerContext; 00043 class RewriteOptions; 00044 class Writer; 00045 struct ContentType; 00046 00047 class OutputResource : public Resource { 00048 public: 00057 OutputResource(ServerContext* server_context, 00058 const StringPiece& resolved_base, 00059 const StringPiece& unmapped_base, 00060 const StringPiece& original_base, 00061 const ResourceNamer& resource_id, 00062 const RewriteOptions* options, 00063 OutputResourceKind kind); 00064 00065 virtual void LoadAndCallback(NotCacheablePolicy not_cacheable_policy, 00066 AsyncCallback* callback, 00067 MessageHandler* handler); 00074 virtual GoogleString url() const; 00078 GoogleString UrlEvenIfHashNotSet(); 00079 00084 void DumpToDisk(MessageHandler* handler); 00085 00090 NamedLock* CreationLock(); 00091 00094 bool TryLockForCreation(); 00095 00099 void LockForCreation(QueuedWorkerPool::Sequence* worker, Function* callback); 00100 00102 void DropCreationLock(); 00103 00106 void UpdateCachedResultPreservingInputInfo(CachedResult* to_update) const; 00107 00121 virtual GoogleString name_key() const; 00122 00132 GoogleString HttpCacheKey() const; 00133 00135 const GoogleString& resolved_base() const { return resolved_base_; } 00136 const GoogleString& unmapped_base() const { return unmapped_base_; } 00137 const GoogleString& original_base() const { return original_base_; } 00138 const ResourceNamer& full_name() const { return full_name_; } 00139 ResourceNamer* mutable_full_name() { return &full_name_; } 00140 StringPiece name() const { return full_name_.name(); } 00141 StringPiece experiment() const { return full_name_.experiment(); } 00142 StringPiece suffix() const; 00143 StringPiece filter_prefix() const { return full_name_.id(); } 00144 StringPiece hash() const { return full_name_.hash(); } 00145 bool has_hash() const { return !hash().empty(); } 00146 00156 GoogleString decoded_base() const; 00157 00165 bool IsWritten() const { return writing_complete_; } 00166 00168 virtual void SetType(const ContentType* type); 00169 00182 const CachedResult* cached_result() const { return cached_result_; } 00183 00191 CachedResult* EnsureCachedResultCreated(); 00192 00193 void clear_cached_result(); 00194 00197 void set_cached_result(CachedResult* cached_result) { 00198 clear_cached_result(); 00199 cached_result_ = cached_result; 00200 } 00201 00203 CachedResult* ReleaseCachedResult() { 00204 CHECK(cached_result_owned_); 00205 CachedResult* ret = cached_result_; 00206 cached_result_ = NULL; 00207 cached_result_owned_ = false; 00208 return ret; 00209 } 00210 00211 OutputResourceKind kind() const { return kind_; } 00212 00213 bool has_lock() const; 00214 00216 void SetWritten(bool written) { writing_complete_ = true; } 00217 00218 virtual const RewriteOptions* rewrite_options() const { 00219 return rewrite_options_; 00220 } 00221 00225 Writer* BeginWrite(MessageHandler* message_handler); 00226 void EndWrite(MessageHandler* message_handler); 00227 00228 virtual bool UseHttpCache() const { return true; } 00229 00230 protected: 00231 virtual ~OutputResource(); 00232 REFCOUNT_FRIEND_DECLARATION(OutputResource); 00233 00234 private: 00235 friend class RewriteDriver; 00236 friend class ServerContext; 00237 friend class ServerContextTest; 00238 00239 void SetHash(const StringPiece& hash); 00240 StringPiece extension() const { return full_name_.ext(); } 00241 00243 GoogleString DumpFileName() const; 00244 00245 bool writing_complete_; 00246 00253 bool cached_result_owned_; 00254 CachedResult* cached_result_; 00255 00274 GoogleString resolved_base_; 00275 GoogleString unmapped_base_; 00276 GoogleString original_base_; 00277 00278 ResourceNamer full_name_; 00279 00281 mutable GoogleString computed_url_; 00282 00285 scoped_ptr<NamedLock> creation_lock_; 00286 00287 const RewriteOptions* rewrite_options_; 00288 00291 OutputResourceKind kind_; 00292 00293 DISALLOW_COPY_AND_ASSIGN(OutputResource); 00294 }; 00295 00296 } 00297 00298 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_OUTPUT_RESOURCE_H_