Page Speed Optimization Libraries  1.8.31.2
net/instaweb/rewriter/public/downstream_cache_purger.h
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00001 /*
00002  * Copyright 2013 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_DOWNSTREAM_CACHE_PURGER_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_DOWNSTREAM_CACHE_PURGER_H_
00021 
00022 #include "net/instaweb/util/public/string.h"
00023 #include "pagespeed/kernel/base/basictypes.h"
00024 
00025 namespace net_instaweb {
00026 class GoogleUrl;
00027 class RewriteDriver;
00028 
00031 class DownstreamCachePurger {
00032  public:
00033   explicit DownstreamCachePurger(RewriteDriver* driver);
00034   ~DownstreamCachePurger();
00035 
00039   bool MaybeIssuePurge(const GoogleUrl& google_url);
00040 
00041   void Clear();
00042 
00043  private:
00048   bool ShouldPurgeRewrittenResponse(const GoogleUrl& google_url);
00049 
00052   bool GeneratePurgeRequestParameters(const GoogleUrl& page_url);
00053 
00055   void PurgeDownstreamCache();
00056 
00057   RewriteDriver* driver_;
00058   GoogleString purge_url_;
00059   GoogleString purge_method_;
00060 
00064   bool made_downstream_purge_attempt_;
00065 
00066   DISALLOW_COPY_AND_ASSIGN(DownstreamCachePurger);
00067 };
00068 
00069 }  
00070 
00071 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_DOWNSTREAM_CACHE_PURGER_H_
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