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 */ 00017 00018 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_SUPPRESS_PREHEAD_FILTER_H_ 00019 #define NET_INSTAWEB_REWRITER_PUBLIC_SUPPRESS_PREHEAD_FILTER_H_ 00020 00021 #include "net/instaweb/htmlparse/public/html_writer_filter.h" 00022 #include "net/instaweb/http/public/response_headers.h" 00023 #include "net/instaweb/util/public/basictypes.h" 00024 #include "net/instaweb/util/public/scoped_ptr.h" 00025 #include "net/instaweb/util/public/string.h" 00026 #include "net/instaweb/util/public/string_writer.h" 00027 #include "net/instaweb/util/public/split_writer.h" 00028 00029 namespace net_instaweb { 00030 00031 class HtmlElement; 00032 class RewriteDriver; 00033 class Writer; 00034 00041 class SuppressPreheadFilter : public HtmlWriterFilter { 00042 public: 00043 explicit SuppressPreheadFilter(RewriteDriver* driver); 00044 00045 virtual void StartDocument(); 00046 00047 virtual void StartElement(HtmlElement* element); 00048 00049 virtual void EndElement(HtmlElement* element); 00050 00051 virtual void EndDocument(); 00052 00053 protected: 00054 virtual void Clear(); 00055 RewriteDriver* driver() const { return driver_; } 00056 00057 private: 00058 friend class SuppressPreheadFilterTest; 00059 void SendCookies(HtmlElement* element); 00060 00061 void PreHeadDone(HtmlElement* element); 00062 00063 static void UpdateFetchLatencyInFlushEarlyProto(int64 latency, 00064 RewriteDriver*driver); 00065 00067 bool ExtractAndUpdateXUACompatible(HtmlElement* element); 00068 00069 bool seen_start_html_; 00070 bool seen_first_head_; 00071 bool has_charset_; 00072 bool has_x_ua_compatible_; 00073 00074 HtmlElement* noscript_element_; 00075 RewriteDriver* driver_; 00076 GoogleString pre_head_; 00077 GoogleString charset_; 00079 Writer* original_writer_; 00080 StringWriter pre_head_writer_; 00081 00082 scoped_ptr<SplitWriter> pre_head_and_response_writer_; 00083 ResponseHeaders response_headers_; 00084 00085 DISALLOW_COPY_AND_ASSIGN(SuppressPreheadFilter); 00086 }; 00087 00088 } 00089 00090 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_SUPPRESS_PREHEAD_FILTER_H_