1 /* <!-- copyright */
2 /*
3 * aria2 - The high speed download utility
4 *
5 * Copyright (C) 2006 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 #include "ProtocolDetector.h"
36
37 #include <cstring>
38 #include <iomanip>
39
40 #include "Request.h"
41 #include "File.h"
42 #include "util.h"
43 #include "RecoverableException.h"
44 #include "uri.h"
45 #include "BufferedFile.h"
46 #ifdef ENABLE_BITTORRENT
47 # include "bittorrent_helper.h"
48 #endif // ENABLE_BITTORRENT
49
50 namespace aria2 {
51
52 ProtocolDetector::ProtocolDetector() = default;
53
54 ProtocolDetector::~ProtocolDetector() = default;
55
isStreamProtocol(const std::string & uri) const56 bool ProtocolDetector::isStreamProtocol(const std::string& uri) const
57 {
58 return uri_split(nullptr, uri.c_str()) == 0;
59 }
60
guessTorrentFile(const std::string & uri) const61 bool ProtocolDetector::guessTorrentFile(const std::string& uri) const
62 {
63 BufferedFile fp(uri.c_str(), BufferedFile::READ);
64 if (fp) {
65 char head[1];
66 if (fp.read(head, sizeof(head)) == sizeof(head)) {
67 return head[0] == 'd';
68 }
69 else {
70 return false;
71 }
72 }
73 else {
74 return false;
75 }
76 }
77
guessTorrentMagnet(const std::string & uri) const78 bool ProtocolDetector::guessTorrentMagnet(const std::string& uri) const
79 {
80 #ifdef ENABLE_BITTORRENT
81 try {
82 bittorrent::parseMagnet(uri);
83 return true;
84 }
85 catch (RecoverableException& e) {
86 return false;
87 }
88 #else // !ENABLE_BITTORRENT
89 return false;
90 #endif // !ENABLE_BITTORRENT
91 }
92
guessMetalinkFile(const std::string & uri) const93 bool ProtocolDetector::guessMetalinkFile(const std::string& uri) const
94 {
95 BufferedFile fp(uri.c_str(), BufferedFile::READ);
96 if (fp) {
97 char head[5];
98 if (fp.read(head, sizeof(head)) == sizeof(head)) {
99 return memcmp(head, "<?xml", 5) == 0;
100 }
101 else {
102 return false;
103 }
104 }
105 else {
106 return false;
107 }
108 }
109
110 } // namespace aria2
111