Page Speed Optimization Libraries
1.7.30.3
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00001 /* 00002 * Copyright 2012 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_SPLIT_HTML_FILTER_H_ 00020 #define NET_INSTAWEB_REWRITER_PUBLIC_SPLIT_HTML_FILTER_H_ 00021 00022 #include <vector> 00023 00024 #include "net/instaweb/rewriter/public/script_tag_scanner.h" 00025 #include "net/instaweb/rewriter/public/suppress_prehead_filter.h" 00026 #include "net/instaweb/util/public/basictypes.h" 00027 #include "net/instaweb/util/public/json.h" 00028 #include "net/instaweb/util/public/json_writer.h" 00029 #include "net/instaweb/util/public/null_writer.h" 00030 #include "net/instaweb/util/public/scoped_ptr.h" 00031 #include "net/instaweb/util/public/string.h" 00032 #include "net/instaweb/util/public/string_util.h" 00033 00034 namespace net_instaweb { 00035 00036 class HtmlElement; 00037 class RewriteDriver; 00038 class RewriteOptions; 00039 class SplitHtmlConfig; 00040 class SplitHtmlState; 00041 class StaticAssetManager; 00042 class Writer; 00043 00046 00049 class SplitHtmlFilter : public SuppressPreheadFilter { 00050 public: 00051 static const char kSplitSuffixJsFormatString[]; 00052 static const char kSplitTwoChunkSuffixJsFormatString[]; 00053 static const char kLoadHiResImages[]; 00054 static const char kMetaReferer[]; 00055 00056 explicit SplitHtmlFilter(RewriteDriver* rewrite_driver); 00057 virtual ~SplitHtmlFilter(); 00058 00059 virtual void DetermineEnabled(); 00060 00061 virtual void StartDocument(); 00062 virtual void EndDocument(); 00063 00064 virtual void StartElement(HtmlElement* element); 00065 virtual void EndElement(HtmlElement* element); 00066 00067 static const GoogleString& GetBlinkJsUrl( 00068 const RewriteOptions* options, 00069 StaticAssetManager* static_asset_manager); 00070 00071 virtual const char* Name() const { return "SplitHtmlFilter"; } 00072 00073 private: 00074 void ServeNonCriticalPanelContents(const Json::Value& json); 00075 00078 void MarkElementWithPanelId(HtmlElement* element, 00079 const GoogleString& panel_id); 00080 00082 GoogleString GetPanelIdForInstance(HtmlElement* element); 00083 00085 GoogleString GenerateCriticalLineConfigString(); 00086 00089 void EndPanelInstance(); 00090 00092 void StartPanelInstance(HtmlElement* element); 00093 00095 void InsertPanelStub(HtmlElement* element, const GoogleString& panel_id); 00096 00098 void AppendJsonData(Json::Value* dictionary, const Json::Value& dict); 00099 00100 void WriteString(const StringPiece& str); 00101 00105 void InsertSplitInitScripts(HtmlElement* element); 00106 00107 void InvokeBaseHtmlFilterStartDocument(); 00108 00109 void InvokeBaseHtmlFilterStartElement(HtmlElement* element); 00110 00111 void InvokeBaseHtmlFilterEndElement(HtmlElement* element); 00112 00113 void InvokeBaseHtmlFilterEndDocument(); 00114 00119 bool IsAllowedCrossDomainRequest(StringPiece cross_origin); 00120 00121 RewriteDriver* rewrite_driver_; 00122 const SplitHtmlConfig* config_; 00123 scoped_ptr<SplitHtmlState> state_; 00124 const RewriteOptions* options_; 00125 std::vector<ElementJsonPair> element_json_stack_; 00126 Json::FastWriter fast_writer_; 00127 scoped_ptr<JsonWriter> json_writer_; 00128 Writer* original_writer_; 00129 NullWriter null_writer_; 00130 StringPiece url_; 00131 bool script_written_; 00132 bool flush_head_enabled_; 00133 bool disable_filter_; 00134 bool inside_pagespeed_no_defer_script_; 00135 bool serve_response_in_two_chunks_; 00136 int last_script_index_before_panel_stub_; 00137 bool panel_seen_; 00138 StaticAssetManager* static_asset_manager_; 00139 ScriptTagScanner script_tag_scanner_; 00140 00141 DISALLOW_COPY_AND_ASSIGN(SplitHtmlFilter); 00142 }; 00143 00144 } 00145 00146 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_SPLIT_HTML_FILTER_H_