Page Speed Optimization Libraries
1.6.29.3
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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_REWRITER_PUBLIC_IN_PLACE_REWRITE_CONTEXT_H_ 00020 #define NET_INSTAWEB_REWRITER_PUBLIC_IN_PLACE_REWRITE_CONTEXT_H_ 00021 00022 #include "net/instaweb/http/public/async_fetch.h" 00023 #include "net/instaweb/http/public/content_type.h" 00024 #include "net/instaweb/http/public/http_value.h" 00025 #include "net/instaweb/http/public/http_value_writer.h" 00026 #include "net/instaweb/http/public/response_headers.h" 00027 #include "net/instaweb/rewriter/public/output_resource_kind.h" 00028 #include "net/instaweb/rewriter/public/resource.h" 00029 #include "net/instaweb/rewriter/public/server_context.h" 00030 #include "net/instaweb/rewriter/public/resource_slot.h" 00031 #include "net/instaweb/rewriter/public/rewrite_context.h" 00032 #include "net/instaweb/rewriter/public/rewrite_options.h" 00033 #include "net/instaweb/rewriter/public/single_rewrite_context.h" 00034 #include "net/instaweb/util/public/basictypes.h" 00035 #include "net/instaweb/util/public/proto_util.h" 00036 #include "net/instaweb/util/public/scoped_ptr.h" 00037 #include "net/instaweb/util/public/string.h" 00038 #include "net/instaweb/util/public/string_util.h" 00039 00040 namespace net_instaweb { 00041 00042 class CacheUrlAsyncFetcher; 00043 class InputInfo; 00044 class MessageHandler; 00045 class ResourceContext; 00046 class RewriteDriver; 00047 class RewriteFilter; 00048 class Statistics; 00049 class Variable; 00050 00054 class InPlaceRewriteResourceSlot : public ResourceSlot { 00055 public: 00056 static const char kIproSlotLocation[]; 00057 explicit InPlaceRewriteResourceSlot(const ResourcePtr& resource); 00058 00060 virtual void Render(); 00061 00063 virtual GoogleString LocationString(); 00064 00065 protected: 00066 virtual ~InPlaceRewriteResourceSlot(); 00067 00068 private: 00069 DISALLOW_COPY_AND_ASSIGN(InPlaceRewriteResourceSlot); 00070 }; 00071 00073 class InPlaceRewriteContext : public SingleRewriteContext { 00074 public: 00078 static const char kInPlaceOversizedOptStream[]; 00079 static const char kInPlaceUncacheableRewrites[]; 00080 00081 InPlaceRewriteContext(RewriteDriver* driver, const StringPiece& url); 00082 virtual ~InPlaceRewriteContext(); 00083 00085 virtual void RewriteSingle(const ResourcePtr& input, 00086 const OutputResourcePtr& output); 00088 virtual const char* id() const { return RewriteOptions::kInPlaceRewriteId; } 00090 virtual OutputResourceKind kind() const { return kRewrittenResource; } 00092 virtual bool DecodeFetchUrls(const OutputResourcePtr& output_resource, 00093 MessageHandler* message_handler, 00094 GoogleUrlStarVector* url_vector); 00096 virtual void StartFetchReconstruction(); 00097 00098 static void InitStats(Statistics* statistics); 00099 00100 bool proxy_mode() const { return proxy_mode_; } 00101 void set_proxy_mode(bool x) { proxy_mode_ = x; } 00102 00103 virtual int64 GetRewriteDeadlineAlarmMs() const; 00104 00105 virtual GoogleString UserAgentCacheKey( 00106 const ResourceContext* resource_context) const; 00107 virtual void EncodeUserAgentIntoResourceContext(ResourceContext* context); 00108 00109 private: 00110 friend class RecordingFetch; 00112 virtual void Harvest(); 00113 void StartFetchReconstructionParent(); 00115 virtual void FixFetchFallbackHeaders(ResponseHeaders* headers); 00117 virtual void FetchTryFallback(const GoogleString& url, 00118 const StringPiece& hash); 00120 virtual void FetchCallbackDone(bool success); 00121 00122 RewriteFilter* GetRewriteFilter(const ContentType& type); 00123 00125 void UpdateDateAndExpiry(const protobuf::RepeatedPtrField<InputInfo>& inputs, 00126 int64* date_ms, int64* expiry_ms); 00129 bool InPlaceOptimizeForBrowserEnabled() const; 00132 bool ShouldAddVaryUserAgent() const; 00133 00134 RewriteDriver* driver_; 00135 GoogleString url_; 00137 bool is_rewritten_; 00140 GoogleString rewritten_hash_; 00141 00143 ResourcePtr input_resource_; 00144 OutputResourcePtr output_resource_; 00145 00146 scoped_ptr<CacheUrlAsyncFetcher> cache_fetcher_; 00147 00157 bool proxy_mode_; 00158 00159 DISALLOW_COPY_AND_ASSIGN(InPlaceRewriteContext); 00160 }; 00161 00164 class RecordingFetch : public SharedAsyncFetch { 00165 public: 00166 RecordingFetch(AsyncFetch* async_fetch, 00167 const ResourcePtr& resource, 00168 InPlaceRewriteContext* context, 00169 MessageHandler* handler); 00170 00171 virtual ~RecordingFetch(); 00172 00174 virtual void HandleHeadersComplete(); 00176 virtual bool HandleWrite(const StringPiece& content, MessageHandler* handler); 00178 virtual bool HandleFlush(MessageHandler* handler); 00180 virtual void HandleDone(bool success); 00181 00182 private: 00183 void FreeDriver(); 00184 00185 bool CanInPlaceRewrite(); 00186 00190 bool ShouldStream() const; 00191 00192 MessageHandler* handler_; 00193 ResourcePtr resource_; 00194 InPlaceRewriteContext* context_; 00195 00198 bool can_in_place_rewrite_; 00199 00201 bool streaming_; 00202 HTTPValue cache_value_; 00203 HTTPValueWriter cache_value_writer_; 00204 ResponseHeaders saved_headers_; 00205 Variable* in_place_oversized_opt_stream_; 00206 Variable* in_place_uncacheable_rewrites_; 00207 DISALLOW_COPY_AND_ASSIGN(RecordingFetch); 00208 }; 00209 00210 } 00211 00212 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_IN_PLACE_REWRITE_CONTEXT_H_