Page Speed Optimization Libraries  1.7.30.1
net/instaweb/rewriter/public/data_url_input_resource.h
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00001 /*
00002  * Copyright 2010 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 
00022 
00023 #include "net/instaweb/http/public/request_context.h"
00024 #include "net/instaweb/rewriter/public/resource.h"
00025 #include "net/instaweb/util/public/basictypes.h"
00026 #include "net/instaweb/util/public/data_url.h"
00027 #include "net/instaweb/util/public/scoped_ptr.h"
00028 #include "net/instaweb/util/public/string.h"
00029 #include "net/instaweb/util/public/string_util.h"
00030 
00031 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_DATA_URL_INPUT_RESOURCE_H_
00032 #define NET_INSTAWEB_REWRITER_PUBLIC_DATA_URL_INPUT_RESOURCE_H_
00033 
00034 namespace net_instaweb {
00035 
00036 class InputInfo;
00037 class ServerContext;
00038 struct ContentType;
00039 
00040 enum Encoding;
00041 
00042 class DataUrlInputResource : public Resource {
00043  public:
00045   static ResourcePtr Make(const StringPiece& url,
00046                           ServerContext* server_context) {
00047     ResourcePtr resource;
00048     const ContentType* type;
00049     Encoding encoding;
00050     StringPiece encoded_contents;
00054     GoogleString* url_copy = new GoogleString();
00055     url.CopyToString(url_copy);
00056     if (ParseDataUrl(*url_copy, &type, &encoding, &encoded_contents)) {
00057       resource.reset(new DataUrlInputResource(url_copy, encoding, type,
00058                                               encoded_contents,
00059                                               server_context));
00060     }
00061     return resource;
00062   }
00063 
00064   virtual ~DataUrlInputResource();
00065 
00066   virtual bool IsValidAndCacheable() const;
00067 
00069   virtual void FillInPartitionInputInfo(HashHint include_content_hash,
00070                                         InputInfo* input);
00071 
00072   virtual GoogleString url() const { return *url_.get(); }
00073 
00074   virtual bool UseHttpCache() const { return false; }
00075 
00076  protected:
00077   virtual void LoadAndCallback(NotCacheablePolicy not_cacheable_policy,
00078                                const RequestContextPtr& request_context,
00079                                AsyncCallback* callback);
00080 
00081  private:
00082   DataUrlInputResource(const GoogleString* url,
00083                        Encoding encoding,
00084                        const ContentType* type,
00085                        const StringPiece& encoded_contents,
00086                        ServerContext* server_context);
00087 
00088   scoped_ptr<const GoogleString> url_;
00089   const Encoding encoding_;
00090   const StringPiece encoded_contents_; 
00091   GoogleString decoded_contents_;
00092 
00093   DISALLOW_COPY_AND_ASSIGN(DataUrlInputResource);
00094 };
00095 
00096 }  
00097 
00098 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_DATA_URL_INPUT_RESOURCE_H_
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