Page Speed Optimization Libraries
1.3.25.1
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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 InputInfo; 00043 class MessageHandler; 00044 class ResourceContext; 00045 class RewriteDriver; 00046 class RewriteFilter; 00047 class Statistics; 00048 class UrlAsyncFetcher; 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 00080 InPlaceRewriteContext(RewriteDriver* driver, const StringPiece& url); 00081 virtual ~InPlaceRewriteContext(); 00082 00084 virtual void RewriteSingle(const ResourcePtr& input, 00085 const OutputResourcePtr& output); 00087 virtual const char* id() const { return RewriteOptions::kInPlaceRewriteId; } 00089 virtual OutputResourceKind kind() const { return kRewrittenResource; } 00091 virtual bool DecodeFetchUrls(const OutputResourcePtr& output_resource, 00092 MessageHandler* message_handler, 00093 GoogleUrlStarVector* url_vector); 00095 virtual void StartFetchReconstruction(); 00096 00097 static void InitStats(Statistics* statistics); 00098 00099 bool perform_http_fetch() const { return perform_http_fetch_; } 00100 void set_perform_http_fetch(bool x) { perform_http_fetch_ = x; } 00101 00102 virtual int64 GetRewriteDeadlineAlarmMs() const; 00103 00104 virtual GoogleString UserAgentCacheKey( 00105 const ResourceContext* resource_context) const; 00106 virtual void EncodeUserAgentIntoResourceContext(ResourceContext* context); 00107 00108 private: 00109 friend class RecordingFetch; 00111 virtual void Harvest(); 00112 void StartFetchReconstructionParent(); 00114 virtual void FixFetchFallbackHeaders(ResponseHeaders* headers); 00116 virtual void FetchTryFallback(const GoogleString& url, 00117 const StringPiece& hash); 00119 virtual void FetchCallbackDone(bool success); 00120 00121 RewriteFilter* GetRewriteFilter(const ContentType& type); 00122 00124 void UpdateDateAndExpiry(const protobuf::RepeatedPtrField<InputInfo>& inputs, 00125 int64* date_ms, int64* expiry_ms); 00128 bool InPlaceOptimizeForBrowserEnabled() const; 00131 bool ShouldAddVaryUserAgent() const; 00132 00135 virtual bool do_stale_rewrite() const { return false; } 00136 00137 RewriteDriver* driver_; 00138 GoogleString url_; 00140 bool is_rewritten_; 00143 GoogleString rewritten_hash_; 00144 00146 ResourcePtr input_resource_; 00147 OutputResourcePtr output_resource_; 00148 00149 scoped_ptr<UrlAsyncFetcher> cache_fetcher_; 00150 00152 bool perform_http_fetch_; 00153 00154 DISALLOW_COPY_AND_ASSIGN(InPlaceRewriteContext); 00155 }; 00156 00159 class RecordingFetch : public SharedAsyncFetch { 00160 public: 00161 RecordingFetch(AsyncFetch* async_fetch, 00162 const ResourcePtr& resource, 00163 InPlaceRewriteContext* context, 00164 MessageHandler* handler); 00165 00166 virtual ~RecordingFetch(); 00167 00169 virtual void HandleHeadersComplete(); 00171 virtual bool HandleWrite(const StringPiece& content, MessageHandler* handler); 00173 virtual bool HandleFlush(MessageHandler* handler); 00175 virtual void HandleDone(bool success); 00176 00177 private: 00178 void FreeDriver(); 00179 00180 bool CanInPlaceRewrite(); 00181 00185 bool ShouldStream(); 00186 00187 MessageHandler* handler_; 00188 ResourcePtr resource_; 00189 InPlaceRewriteContext* context_; 00190 bool can_in_place_rewrite_; 00191 bool streaming_; 00192 HTTPValue cache_value_; 00193 HTTPValueWriter cache_value_writer_; 00194 ResponseHeaders saved_headers_; 00195 Variable* in_place_oversized_opt_stream_; 00196 DISALLOW_COPY_AND_ASSIGN(RecordingFetch); 00197 }; 00198 00199 } 00200 00201 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_IN_PLACE_REWRITE_CONTEXT_H_