1 /* <!-- copyright */
2 /*
3  * aria2 - The high speed download utility
4  *
5  * Copyright (C) 2012 Tatsuhiro Tsujikawa
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  *
21  * In addition, as a special exception, the copyright holders give
22  * permission to link the code of portions of this program with the
23  * OpenSSL library under certain conditions as described in each
24  * individual source file, and distribute linked combinations
25  * including the two.
26  * You must obey the GNU General Public License in all respects
27  * for all of the code used other than OpenSSL.  If you modify
28  * file(s) with this exception, you may extend this exception to your
29  * version of the file(s), but you are not obligated to do so.  If you
30  * do not wish to do so, delete this exception statement from your
31  * version.  If you delete this exception statement from all source
32  * files in the program, then also delete it here.
33  */
34 /* copyright --> */
35 #ifndef D_HTTP_HEADER_PROCESSOR_H
36 #define D_HTTP_HEADER_PROCESSOR_H
37 
38 #include "common.h"
39 
40 #include <utility>
41 #include <string>
42 #include <memory>
43 
44 namespace aria2 {
45 
46 class HttpHeader;
47 
48 class HttpHeaderProcessor {
49 public:
50   enum ParserMode { CLIENT_PARSER, SERVER_PARSER };
51 
52   HttpHeaderProcessor(ParserMode mode);
53 
54   ~HttpHeaderProcessor();
55   /**
56    * Parses incoming data. Returns true if end of header is reached.
57    * This function stops processing data when end of header is
58    * reached.
59    */
60   bool parse(const unsigned char* data, size_t length);
61   bool parse(const std::string& data);
62 
63   /**
64    * Retruns the number of bytes processed in the last invocation of
65    * parse().
66    */
67   size_t getLastBytesProcessed() const;
68 
69   /**
70    * Processes the received header as a http response header and
71    * returns HttpHeader object. This method transfers the ownership of
72    * resulting HttpHeader to the caller.
73    */
74   std::unique_ptr<HttpHeader> getResult();
75 
76   std::string getHeaderString() const;
77 
78   /**
79    * Resets internal status and ready for next header processing.
80    */
81   void clear();
82 
83 private:
84   ParserMode mode_;
85   int state_;
86   size_t lastBytesProcessed_;
87   std::string buf_;
88   std::string lastFieldName_;
89   int lastFieldHdKey_;
90   std::unique_ptr<HttpHeader> result_;
91   std::string headers_;
92 };
93 
94 } // namespace aria2
95 
96 #endif // D_HTTP_HEADER_PROCESSOR_H
97