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325 lines
11 KiB
325 lines
11 KiB
11 years ago
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<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="generator" content="Docutils 0.10: http://docutils.sourceforge.net/" />
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<title>libtorrent Examples</title>
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<meta name="author" content="Arvid Norberg, arvid@rasterbar.com" />
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<link rel="stylesheet" type="text/css" href="../../css/base.css" />
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<link rel="stylesheet" type="text/css" href="../../css/rst.css" />
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/* ]]> */
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</script>
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<style type="text/css">
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/* Hides from IE-mac \*/
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* html pre { height: 1%; }
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<body>
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<div class="document" id="libtorrent-examples">
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<div id="container">
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<div id="headerNav">
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<ul>
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<li class="first"><a href="/">Home</a></li>
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<li><a href="../../products.html">Products</a></li>
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<li><a href="../../contact.html">Contact</a></li>
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</ul>
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</div>
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<div id="header">
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<h1><span>Rasterbar Software</span></h1>
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<h2><span>Software developement and consulting</span></h2>
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</div>
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<div id="main">
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<h1 class="title">libtorrent Examples</h1>
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<table class="docinfo" frame="void" rules="none">
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<col class="docinfo-name" />
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<col class="docinfo-content" />
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<tbody valign="top">
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<tr><th class="docinfo-name">Author:</th>
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<td>Arvid Norberg, <a class="last reference external" href="mailto:arvid@rasterbar.com">arvid@rasterbar.com</a></td></tr>
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</tbody>
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</table>
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<div class="contents topic" id="table-of-contents">
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<p class="topic-title first">Table of contents</p>
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<ul class="simple">
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<li><a class="reference internal" href="#examples" id="id2">examples</a><ul>
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<li><a class="reference internal" href="#dump-torrent" id="id3">dump_torrent</a></li>
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<li><a class="reference internal" href="#simple-client" id="id4">simple client</a></li>
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<li><a class="reference internal" href="#make-torrent" id="id5">make_torrent</a></li>
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</ul>
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</li>
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</ul>
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</div>
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<div class="section" id="examples">
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<h1>examples</h1>
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<p>Except for the example programs in this manual, there's also a bigger example
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of a (little bit) more complete client, <tt class="docutils literal">client_test</tt>. There are separate
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instructions for how to use it <a class="reference external" href="client_test.html">here</a> if you'd like to try it. Note that building
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<tt class="docutils literal">client_test</tt> also requires boost.regex and boost.program_options library.</p>
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<div class="section" id="dump-torrent">
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<h2>dump_torrent</h2>
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<p>This is an example of a program that will take a torrent-file as a parameter and
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print information about it to std out:</p>
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<pre class="literal-block">
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#include <iostream>
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#include <fstream>
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#include <iterator>
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#include <iomanip>
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#include "libtorrent/entry.hpp"
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#include "libtorrent/bencode.hpp"
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#include "libtorrent/torrent_info.hpp"
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#include "libtorrent/lazy_entry.hpp"
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#include <boost/filesystem/operations.hpp>
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int main(int argc, char* argv[])
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{
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using namespace libtorrent;
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using namespace boost::filesystem;
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if (argc != 2)
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{
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std::cerr << "usage: dump_torrent torrent-file\n";
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return 1;
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}
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#if BOOST_VERSION < 103400
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boost::filesystem::path::default_name_check(boost::filesystem::no_check);
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#endif
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#ifndef BOOST_NO_EXCEPTIONS
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try
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{
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#endif
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int size = file_size(argv[1]);
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if (size > 10 * 1000000)
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{
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std::cerr << "file too big (" << size << "), aborting\n";
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return 1;
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}
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std::vector<char> buf(size);
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std::ifstream(argv[1], std::ios_base::binary).read(&buf[0], size);
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lazy_entry e;
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int ret = lazy_bdecode(&buf[0], &buf[0] + buf.size(), e);
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if (ret != 0)
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{
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std::cerr << "invalid bencoding: " << ret << std::endl;
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return 1;
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}
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std::cout << "\n\n----- raw info -----\n\n";
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std::cout << e << std::endl;
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torrent_info t(e);
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// print info about torrent
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std::cout << "\n\n----- torrent file info -----\n\n";
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std::cout << "nodes:\n";
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typedef std::vector<std::pair<std::string, int> > node_vec;
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node_vec const& nodes = t.nodes();
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for (node_vec::const_iterator i = nodes.begin(), end(nodes.end());
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i != end; ++i)
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{
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std::cout << i->first << ":" << i->second << "\n";
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}
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std::cout << "trackers:\n";
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for (std::vector<announce_entry>::const_iterator i = t.trackers().begin();
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i != t.trackers().end(); ++i)
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{
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std::cout << i->tier << ": " << i->url << "\n";
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}
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std::cout << "number of pieces: " << t.num_pieces() << "\n";
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std::cout << "piece length: " << t.piece_length() << "\n";
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std::cout << "info hash: " << t.info_hash() << "\n";
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std::cout << "comment: " << t.comment() << "\n";
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std::cout << "created by: " << t.creator() << "\n";
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std::cout << "files:\n";
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int index = 0;
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for (torrent_info::file_iterator i = t.begin_files();
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i != t.end_files(); ++i, ++index)
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{
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int first = t.map_file(index, 0, 1).piece;
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int last = t.map_file(index, i->size - 1, 1).piece;
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std::cout << " " << std::setw(11) << i->size
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<< " " << i->path.string() << "[ " << first << ", "
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<< last << " ]\n";
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}
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#ifndef BOOST_NO_EXCEPTIONS
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}
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catch (std::exception& e)
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{
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std::cout << e.what() << "\n";
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}
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#endif
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return 0;
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}
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</pre>
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</div>
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<div class="section" id="simple-client">
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<h2>simple client</h2>
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<p>This is a simple client. It doesn't have much output to keep it simple:</p>
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<pre class="literal-block">
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int main(int argc, char* argv[])
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{
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using namespace libtorrent;
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#if BOOST_VERSION < 103400
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namespace fs = boost::filesystem;
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fs::path::default_name_check(fs::no_check);
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#endif
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if (argc != 2)
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{
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std::cerr << "usage: ./simple_client torrent-file\n"
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"to stop the client, press return.\n";
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return 1;
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}
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#ifndef BOOST_NO_EXCEPTIONS
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try
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#endif
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{
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session s;
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s.listen_on(std::make_pair(6881, 6889));
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add_torrent_params p;
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p.save_path = "./";
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p.ti = new torrent_info(argv[1]);
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s.add_torrent(p);
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// wait for the user to end
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char a;
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std::cin.unsetf(std::ios_base::skipws);
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std::cin >> a;
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}
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#ifndef BOOST_NO_EXCEPTIONS
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catch (std::exception& e)
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{
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std::cout << e.what() << "\n";
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}
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#endif
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return 0;
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}
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</pre>
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</div>
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<div class="section" id="make-torrent">
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<h2>make_torrent</h2>
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<p>Shows how to create a torrent from a directory tree:</p>
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<pre class="literal-block">
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#include <iostream>
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#include <fstream>
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#include <iterator>
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#include <iomanip>
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#include "libtorrent/entry.hpp"
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#include "libtorrent/bencode.hpp"
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#include "libtorrent/torrent_info.hpp"
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#include "libtorrent/file.hpp"
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#include "libtorrent/storage.hpp"
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#include "libtorrent/hasher.hpp"
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#include "libtorrent/create_torrent.hpp"
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#include <boost/filesystem/operations.hpp>
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#include <boost/filesystem/path.hpp>
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#include <boost/filesystem/fstream.hpp>
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#include <boost/bind.hpp>
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using namespace boost::filesystem;
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using namespace libtorrent;
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// do not include files and folders whose
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// name starts with a .
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bool file_filter(boost::filesystem::path const& filename)
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{
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if (filename.leaf()[0] == '.') return false;
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std::cerr << filename << std::endl;
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return true;
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}
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void print_progress(int i, int num)
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{
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std::cerr << "\r" << (i+1) << "/" << num;
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}
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int main(int argc, char* argv[])
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{
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using namespace libtorrent;
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using namespace boost::filesystem;
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int piece_size = 256 * 1024;
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char const* creator_str = "libtorrent";
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path::default_name_check(no_check);
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if (argc != 4 && argc != 5)
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{
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std::cerr << "usage: make_torrent <output torrent-file> "
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"<announce url> <file or directory to create torrent from> "
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"[url-seed]\n";
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return 1;
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}
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#ifndef BOOST_NO_EXCEPTIONS
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try
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{
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#endif
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file_storage fs;
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file_pool fp;
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path full_path = complete(path(argv[3]));
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add_files(fs, full_path, file_filter);
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create_torrent t(fs, piece_size);
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t.add_tracker(argv[2]);
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set_piece_hashes(t, full_path.branch_path()
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, boost::bind(&print_progress, _1, t.num_pieces()));
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std::cerr << std::endl;
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t.set_creator(creator_str);
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if (argc == 5) t.add_url_seed(argv[4]);
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// create the torrent and print it to out
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ofstream out(complete(path(argv[1])), std::ios_base::binary);
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bencode(std::ostream_iterator<char>(out), t.generate());
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#ifndef BOOST_NO_EXCEPTIONS
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}
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catch (std::exception& e)
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{
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std::cerr << e.what() << "\n";
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}
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#endif
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return 0;
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}
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</pre>
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</div>
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</div>
|
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</div>
|
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<div id="footer">
|
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<span>Copyright © 2005 Rasterbar Software.</span>
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</div>
|
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</div>
|
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<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
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</script>
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<script type="text/javascript">
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_uacct = "UA-1599045-1";
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urchinTracker();
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</body>
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</html>
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