Page Speed Optimization Libraries  1.8.31.3
net/instaweb/rewriter/public/domain_rewrite_filter.h
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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_DOMAIN_REWRITE_FILTER_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_DOMAIN_REWRITE_FILTER_H_
00021 
00022 #include "net/instaweb/rewriter/public/common_filter.h"
00023 #include "net/instaweb/util/public/basictypes.h"
00024 #include "net/instaweb/util/public/string.h"
00025 #include "net/instaweb/util/public/string_util.h"
00026 
00027 namespace net_instaweb {
00028 
00029 class HtmlElement;
00030 class GoogleUrl;
00031 class ResponseHeaders;
00032 class RewriteDriver;
00033 class Statistics;
00034 class Variable;
00035 
00040 class DomainRewriteFilter : public CommonFilter {
00041  public:
00042   DomainRewriteFilter(RewriteDriver* rewrite_driver, Statistics* stats);
00043   ~DomainRewriteFilter();
00044   static void InitStats(Statistics* statistics);
00045   virtual void StartDocumentImpl();
00046   virtual void EndDocument();
00047   virtual void StartElementImpl(HtmlElement* element);
00048   virtual void EndElementImpl(HtmlElement* element) {}
00049 
00050   virtual const char* Name() const { return "DomainRewrite"; }
00051 
00052   enum RewriteResult {
00053     kRewroteDomain,
00054     kDomainUnchanged,
00055     kFail,
00056   };
00057 
00063   RewriteResult Rewrite(const StringPiece& input_url,
00064                         const GoogleUrl& base_url,
00065                         const RewriteDriver* driver,
00066                         bool apply_sharding,
00067                         GoogleString* output_url) const;
00068 
00071   void UpdateLocationHeader(const GoogleUrl& base_url, RewriteDriver* driver,
00072                             ResponseHeaders* headers) const;
00073 
00074  private:
00076   Variable* rewrite_count_;
00077 
00078   DISALLOW_COPY_AND_ASSIGN(DomainRewriteFilter);
00079 };
00080 
00081 }  
00082 
00083 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_DOMAIN_REWRITE_FILTER_H_
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