Page Speed Optimization Libraries  1.6.29.3
net/instaweb/util/public/url_to_filename_encoder.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  */
00070 
00071 #ifndef NET_INSTAWEB_UTIL_PUBLIC_URL_TO_FILENAME_ENCODER_H_
00072 #define NET_INSTAWEB_UTIL_PUBLIC_URL_TO_FILENAME_ENCODER_H_
00073 
00074 #include <cstddef>
00075 
00076 #include "net/instaweb/util/public/string.h"
00077 #include "net/instaweb/util/public/string_util.h"
00078 
00079 namespace net_instaweb {
00080 
00082 class UrlToFilenameEncoder {
00083  public:
00090   static void EncodeSegment(
00091       const StringPiece& filename_prefix,
00092       const StringPiece& escaped_ending,
00093       char dir_separator,
00094       GoogleString* encoded_filename);
00095 
00098   static bool Decode(const StringPiece& encoded_filename,
00099                      char dir_separator,
00100                      GoogleString* decoded_url);
00101 
00106   static GoogleString Unescape(const StringPiece& escaped_url);
00107 
00108   static const char kEscapeChar;
00109   static const char kTruncationChar;
00110   static const size_t kMaximumSubdirectoryLength;
00111 
00112   friend class UrlToFilenameEncoderTest;
00113 
00114  private:
00122   static void AppendSegment(
00123       GoogleString* segment,
00124       GoogleString* dest);
00125 };
00126 
00127 }  
00128 
00129 #endif  ///< NET_INSTAWEB_UTIL_PUBLIC_URL_TO_FILENAME_ENCODER_H_
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