Page Speed Optimization Libraries
1.8.31.3
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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/rewrite_driver.h" 00025 #include "net/instaweb/rewriter/public/script_tag_scanner.h" 00026 #include "net/instaweb/rewriter/public/server_context.h" 00027 #include "net/instaweb/rewriter/public/suppress_prehead_filter.h" 00028 #include "net/instaweb/util/public/basictypes.h" 00029 #include "net/instaweb/util/public/json.h" 00030 #include "net/instaweb/util/public/json_writer.h" 00031 #include "net/instaweb/util/public/null_writer.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 HtmlElement; 00039 class RewriteOptions; 00040 class SplitHtmlConfig; 00041 class SplitHtmlState; 00042 class StaticAssetManager; 00043 class Writer; 00044 00047 00050 class SplitHtmlFilter : public SuppressPreheadFilter { 00051 public: 00052 static const char kSplitSuffixJsFormatString[]; 00053 static const char kSplitTwoChunkSuffixJsFormatString[]; 00054 static const char kLoadHiResImages[]; 00055 static const char kMetaReferer[]; 00056 00057 explicit SplitHtmlFilter(RewriteDriver* rewrite_driver); 00058 virtual ~SplitHtmlFilter(); 00059 00060 virtual void DetermineEnabled(); 00061 00062 virtual void StartDocument(); 00063 virtual void EndDocument(); 00064 00065 virtual void StartElement(HtmlElement* element); 00066 virtual void EndElement(HtmlElement* element); 00067 00068 static const GoogleString& GetBlinkJsUrl( 00069 const RewriteOptions* options, 00070 const StaticAssetManager* static_asset_manager); 00071 00072 virtual const char* Name() const { return "SplitHtmlFilter"; } 00073 00074 private: 00075 const SplitHtmlConfig* config() const { 00076 return driver()->split_html_config(); 00077 } 00078 const StaticAssetManager* static_asset_manager() const { 00079 return driver()->server_context()->static_asset_manager(); 00080 } 00081 00082 void ServeNonCriticalPanelContents(const Json::Value& json); 00083 00086 void MarkElementWithPanelId(HtmlElement* element, 00087 const GoogleString& panel_id); 00088 00090 GoogleString GetPanelIdForInstance(HtmlElement* element); 00091 00093 GoogleString GenerateCriticalLineConfigString(); 00094 00097 void EndPanelInstance(); 00098 00100 void StartPanelInstance(HtmlElement* element); 00101 00103 void InsertPanelStub(HtmlElement* element, const GoogleString& panel_id); 00104 00106 void AppendJsonData(Json::Value* dictionary, const Json::Value& dict); 00107 00108 void WriteString(const StringPiece& str); 00109 00113 void InsertSplitInitScripts(HtmlElement* element); 00114 00115 void InvokeBaseHtmlFilterStartDocument(); 00116 00117 void InvokeBaseHtmlFilterStartElement(HtmlElement* element); 00118 00119 void InvokeBaseHtmlFilterEndElement(HtmlElement* element); 00120 00121 void InvokeBaseHtmlFilterEndDocument(); 00122 00127 bool IsAllowedCrossDomainRequest(StringPiece cross_origin); 00128 00129 scoped_ptr<SplitHtmlState> state_; 00130 const RewriteOptions* options_; 00131 std::vector<ElementJsonPair> element_json_stack_; 00132 Json::FastWriter fast_writer_; 00133 scoped_ptr<JsonWriter> json_writer_; 00134 Writer* original_writer_; 00135 NullWriter null_writer_; 00136 StringPiece url_; 00137 bool script_written_; 00138 bool flush_head_enabled_; 00139 bool disable_filter_; 00140 bool inside_pagespeed_no_defer_script_; 00141 bool serve_response_in_two_chunks_; 00142 int last_script_index_before_panel_stub_; 00143 bool panel_seen_; 00144 ScriptTagScanner script_tag_scanner_; 00145 00146 DISALLOW_COPY_AND_ASSIGN(SplitHtmlFilter); 00147 }; 00148 00149 } 00150 00151 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_SPLIT_HTML_FILTER_H_