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7087e187 GE |
1 | /*************************************************************************** |
2 | * Copyright (C) 2006 by Gerd v. Egidy * | |
3 | * gve@intra2net.com * | |
4 | * * | |
5 | * This library is free software; you can redistribute it and/or modify * | |
6 | * it under the terms of the GNU Lesser General Public License version * | |
7 | * 2.1 as published by the Free Software Foundation. * | |
8 | * * | |
9 | * This library is distributed in the hope that it will be useful, * | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
12 | * GNU Lesser General Public License for more details. * | |
13 | * * | |
14 | * You should have received a copy of the GNU Lesser General Public * | |
15 | * License along with this program; if not, write to the * | |
16 | * Free Software Foundation, Inc., * | |
17 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * | |
18 | ***************************************************************************/ | |
19 | ||
20 | #include <string> | |
21 | #include <sstream> | |
22 | #include <stdexcept> | |
28cb45a5 | 23 | #include <iostream> |
7087e187 GE |
24 | |
25 | #include <boost/archive/binary_oarchive.hpp> | |
26 | #include <boost/archive/binary_iarchive.hpp> | |
27 | #include <boost/archive/xml_oarchive.hpp> | |
28 | #include <boost/archive/xml_iarchive.hpp> | |
29 | #include <boost/serialization/serialization.hpp> | |
7087e187 | 30 | |
28cb45a5 GE |
31 | #include <boost/bind.hpp> |
32 | ||
7087e187 GE |
33 | #include "command_server.hxx" |
34 | #include "container.hxx" | |
a7170401 | 35 | #include "log.hxx" |
7087e187 | 36 | |
8104c8f7 GE |
37 | #ifdef HAVE_CONFIG_H |
38 | #include <config.h> | |
39 | #endif | |
40 | ||
7087e187 GE |
41 | using namespace std; |
42 | ||
43 | namespace libt2n | |
44 | { | |
45 | ||
28cb45a5 GE |
46 | command_server::command_server(server& _s) |
47 | : s(_s) | |
48 | { | |
49 | // register callback | |
8104c8f7 | 50 | s.add_callback(new_connection,bind(&command_server::send_hello, boost::ref(*this), _1)); |
28cb45a5 GE |
51 | } |
52 | ||
8104c8f7 | 53 | void command_server::send_hello(unsigned int conn_id) |
28cb45a5 | 54 | { |
8104c8f7 GE |
55 | server_connection* sc=s.get_connection(conn_id); |
56 | ||
57 | ostringstream hello; | |
58 | ||
59 | hello << "T2Nv" << PROTOCOL_VERSION << ';'; | |
60 | ||
61 | int byteordercheck=1; | |
62 | hello.write((char*)&byteordercheck,sizeof(byteordercheck)); | |
63 | ||
64 | hello << ';'; | |
65 | ||
66 | sc->write(hello.str()); | |
28cb45a5 GE |
67 | } |
68 | ||
7087e187 GE |
69 | /// handle a command including deserialization and answering |
70 | void command_server::handle_packet(const std::string& packet, server_connection* conn) | |
71 | { | |
a7170401 GE |
72 | OBJLOGSTREAM(s,debug,"handling packet from connection " << conn->get_id()); |
73 | ||
7087e187 GE |
74 | // deserialize packet |
75 | istringstream ifs(packet); | |
76 | boost::archive::binary_iarchive ia(ifs); | |
77 | command_container ccont; | |
01a46463 | 78 | result_container res; |
7087e187 | 79 | |
01a46463 | 80 | try |
d535333f | 81 | { |
01a46463 | 82 | ia >> ccont; |
d535333f | 83 | } |
01a46463 GE |
84 | catch(boost::archive::archive_exception &e) |
85 | { | |
86 | ostringstream msg; | |
87 | msg << "archive_exception while deserializing on server-side, " | |
88 | "code " << e.code << " (" << e.what() << ")"; | |
89 | res.set_exception(new t2n_serialization_error(msg.str())); | |
90 | } | |
91 | catch(...) | |
92 | { throw; } | |
d535333f | 93 | |
01a46463 GE |
94 | if (!res.has_exception()) |
95 | { | |
96 | std::ostream* ostr; | |
97 | if ((ostr=s.get_logstream(fulldebug))!=NULL) | |
98 | { | |
99 | (*ostr) << "decoded packet data: " << std::endl; | |
100 | boost::archive::xml_oarchive xo(*ostr); | |
101 | xo << BOOST_SERIALIZATION_NVP(ccont); | |
102 | } | |
7087e187 | 103 | |
01a46463 GE |
104 | // TODO: cast to command subclass (template) |
105 | command *cmd=ccont.get_command(); | |
7087e187 | 106 | |
01a46463 | 107 | if (cmd) |
7087e187 | 108 | { |
01a46463 GE |
109 | try |
110 | { | |
111 | res.set_result((*cmd)()); | |
112 | } | |
113 | catch (t2n_exception &e) | |
114 | { res.set_exception(e.clone()); } | |
115 | catch (...) | |
116 | { throw; } | |
7087e187 | 117 | } |
01a46463 GE |
118 | else |
119 | throw logic_error("uninitialized command called"); | |
7087e187 | 120 | } |
7087e187 GE |
121 | |
122 | ostringstream ofs; | |
123 | boost::archive::binary_oarchive oa(ofs); | |
124 | ||
01a46463 GE |
125 | try |
126 | { | |
127 | oa << res; | |
128 | } | |
129 | catch(boost::archive::archive_exception &e) | |
130 | { | |
131 | ostringstream msg; | |
132 | msg << "archive_exception while serializing on server-side, " | |
133 | "code " << e.code << " (" << e.what() << ")"; | |
134 | res.set_exception(new t2n_serialization_error(msg.str())); | |
135 | oa << res; | |
136 | } | |
137 | catch(...) | |
138 | { throw; } | |
7087e187 | 139 | |
01a46463 | 140 | std::ostream* ostr; |
d535333f GE |
141 | if ((ostr=s.get_logstream(fulldebug))!=NULL) |
142 | { | |
143 | (*ostr) << "returning result, decoded data: " << std::endl; | |
144 | boost::archive::xml_oarchive xo(*ostr); | |
145 | xo << BOOST_SERIALIZATION_NVP(res); | |
146 | } | |
147 | ||
7087e187 GE |
148 | conn->write(ofs.str()); |
149 | } | |
150 | ||
151 | /** @brief handle incoming commands | |
45a2ebc9 GE |
152 | @param[in,out] usec_timeout wait until new data is found, max timeout usecs. |
153 | -1: wait endless, 0: instant return | |
7087e187 | 154 | */ |
45a2ebc9 | 155 | void command_server::handle(long long usec_timeout, long long* usec_timeout_remaining) |
7087e187 | 156 | { |
45a2ebc9 | 157 | if (s.fill_buffer(usec_timeout,usec_timeout_remaining)) |
7087e187 GE |
158 | { |
159 | string packet; | |
160 | unsigned int conn_id; | |
161 | ||
162 | while (s.get_packet(packet,conn_id)) | |
163 | handle_packet(packet,s.get_connection(conn_id)); | |
164 | } | |
165 | s.cleanup(); | |
166 | } | |
167 | ||
168 | } |