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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="generator" content="Docutils 0.5: http://docutils.sourceforge.net/" />
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<title>libtorrent Examples</title>
<meta name="author" content="Arvid Norberg, arvid&#64;rasterbar.com" />
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<link rel="stylesheet" type="text/css" href="../../css/base.css" />
<link rel="stylesheet" type="text/css" href="../../css/rst.css" />
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<link rel="stylesheet" href="style.css" type="text/css" />
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<style type="text/css">
/* Hides from IE-mac \*/
* html pre { height: 1%; }
/* End hide from IE-mac */
</style>
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</head>
<body>
<div class="document" id="libtorrent-examples">
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<div id="container">
<div id="headerNav">
<ul>
<li class="first"><a href="/">Home</a></li>
<li><a href="../../products.html">Products</a></li>
<li><a href="../../contact.html">Contact</a></li>
</ul>
</div>
<div id="header">
<h1><span>Rasterbar Software</span></h1>
<h2><span>Software developement and consulting</span></h2>
</div>
<div id="main">
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<h1 class="title">libtorrent Examples</h1>
<table class="docinfo" frame="void" rules="none">
<col class="docinfo-name" />
<col class="docinfo-content" />
<tbody valign="top">
<tr><th class="docinfo-name">Author:</th>
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<td>Arvid Norberg, <a class="last reference external" href="mailto:arvid&#64;rasterbar.com">arvid&#64;rasterbar.com</a></td></tr>
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</tbody>
</table>
<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>
<li><a class="reference internal" href="#dump-torrent" id="id3">dump_torrent</a></li>
<li><a class="reference internal" href="#simple-client" id="id4">simple client</a></li>
<li><a class="reference internal" href="#make-torrent" id="id5">make_torrent</a></li>
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</ul>
</li>
</ul>
</div>
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<div class="section" id="examples">
<h1>examples</h1>
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<p>Except for the example programs in this manual, there's also a bigger example
of a (little bit) more complete client, <tt class="docutils literal"><span class="pre">client_test</span></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"><span class="pre">client_test</span></tt> also requires boost.regex and boost.program_options library.</p>
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<div class="section" id="dump-torrent">
<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
print information about it to std out:</p>
<pre class="literal-block">
#include &lt;iostream&gt;
#include &lt;fstream&gt;
#include &lt;iterator&gt;
#include &lt;iomanip&gt;
#include &quot;libtorrent/entry.hpp&quot;
#include &quot;libtorrent/bencode.hpp&quot;
#include &quot;libtorrent/torrent_info.hpp&quot;
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#include &quot;libtorrent/lazy_entry.hpp&quot;
#include &lt;boost/filesystem/operations.hpp&gt;
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int main(int argc, char* argv[])
{
using namespace libtorrent;
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using namespace boost::filesystem;
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if (argc != 2)
{
std::cerr &lt;&lt; &quot;usage: dump_torrent torrent-file\n&quot;;
return 1;
}
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#if BOOST_VERSION &lt; 103400
boost::filesystem::path::default_name_check(boost::filesystem::no_check);
#endif
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#ifndef BOOST_NO_EXCEPTIONS
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try
{
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#endif
int size = file_size(argv[1]);
if (size &gt; 10 * 1000000)
{
std::cerr &lt;&lt; &quot;file too big (&quot; &lt;&lt; size &lt;&lt; &quot;), aborting\n&quot;;
return 1;
}
std::vector&lt;char&gt; buf(size);
std::ifstream(argv[1], std::ios_base::binary).read(&amp;buf[0], size);
lazy_entry e;
int ret = lazy_bdecode(&amp;buf[0], &amp;buf[0] + buf.size(), e);
if (ret != 0)
{
std::cerr &lt;&lt; &quot;invalid bencoding: &quot; &lt;&lt; ret &lt;&lt; std::endl;
return 1;
}
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std::cout &lt;&lt; &quot;\n\n----- raw info -----\n\n&quot;;
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std::cout &lt;&lt; e &lt;&lt; std::endl;
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torrent_info t(e);
// print info about torrent
std::cout &lt;&lt; &quot;\n\n----- torrent file info -----\n\n&quot;;
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std::cout &lt;&lt; &quot;nodes:\n&quot;;
typedef std::vector&lt;std::pair&lt;std::string, int&gt; &gt; node_vec;
node_vec const&amp; nodes = t.nodes();
for (node_vec::const_iterator i = nodes.begin(), end(nodes.end());
i != end; ++i)
{
std::cout &lt;&lt; i-&gt;first &lt;&lt; &quot;:&quot; &lt;&lt; i-&gt;second &lt;&lt; &quot;\n&quot;;
}
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std::cout &lt;&lt; &quot;trackers:\n&quot;;
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for (std::vector&lt;announce_entry&gt;::const_iterator i = t.trackers().begin();
i != t.trackers().end(); ++i)
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{
std::cout &lt;&lt; i-&gt;tier &lt;&lt; &quot;: &quot; &lt;&lt; i-&gt;url &lt;&lt; &quot;\n&quot;;
}
std::cout &lt;&lt; &quot;number of pieces: &quot; &lt;&lt; t.num_pieces() &lt;&lt; &quot;\n&quot;;
std::cout &lt;&lt; &quot;piece length: &quot; &lt;&lt; t.piece_length() &lt;&lt; &quot;\n&quot;;
std::cout &lt;&lt; &quot;info hash: &quot; &lt;&lt; t.info_hash() &lt;&lt; &quot;\n&quot;;
std::cout &lt;&lt; &quot;comment: &quot; &lt;&lt; t.comment() &lt;&lt; &quot;\n&quot;;
std::cout &lt;&lt; &quot;created by: &quot; &lt;&lt; t.creator() &lt;&lt; &quot;\n&quot;;
std::cout &lt;&lt; &quot;files:\n&quot;;
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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;
int last = t.map_file(index, i-&gt;size - 1, 1).piece;
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std::cout &lt;&lt; &quot; &quot; &lt;&lt; std::setw(11) &lt;&lt; i-&gt;size
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&lt;&lt; &quot; &quot; &lt;&lt; i-&gt;path.string() &lt;&lt; &quot;[ &quot; &lt;&lt; first &lt;&lt; &quot;, &quot;
&lt;&lt; last &lt;&lt; &quot; ]\n&quot;;
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}
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#ifndef BOOST_NO_EXCEPTIONS
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}
catch (std::exception&amp; e)
{
std::cout &lt;&lt; e.what() &lt;&lt; &quot;\n&quot;;
}
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#endif
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return 0;
}
</pre>
</div>
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<div class="section" id="simple-client">
<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>
<pre class="literal-block">
int main(int argc, char* argv[])
{
using namespace libtorrent;
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#if BOOST_VERSION &lt; 103400
namespace fs = boost::filesystem;
fs::path::default_name_check(fs::no_check);
#endif
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if (argc != 2)
{
std::cerr &lt;&lt; &quot;usage: ./simple_client torrent-file\n&quot;
&quot;to stop the client, press return.\n&quot;;
return 1;
}
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#ifndef BOOST_NO_EXCEPTIONS
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try
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#endif
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{
session s;
s.listen_on(std::make_pair(6881, 6889));
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add_torrent_params p;
p.save_path = &quot;./&quot;;
p.ti = new torrent_info(argv[1]);
s.add_torrent(p);
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// wait for the user to end
char a;
std::cin.unsetf(std::ios_base::skipws);
std::cin &gt;&gt; a;
}
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#ifndef BOOST_NO_EXCEPTIONS
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catch (std::exception&amp; e)
{
std::cout &lt;&lt; e.what() &lt;&lt; &quot;\n&quot;;
}
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#endif
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return 0;
}
</pre>
</div>
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<div class="section" id="make-torrent">
<h2>make_torrent</h2>
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<p>Shows how to create a torrent from a directory tree:</p>
<pre class="literal-block">
#include &lt;iostream&gt;
#include &lt;fstream&gt;
#include &lt;iterator&gt;
#include &lt;iomanip&gt;
#include &quot;libtorrent/entry.hpp&quot;
#include &quot;libtorrent/bencode.hpp&quot;
#include &quot;libtorrent/torrent_info.hpp&quot;
#include &quot;libtorrent/file.hpp&quot;
#include &quot;libtorrent/storage.hpp&quot;
#include &quot;libtorrent/hasher.hpp&quot;
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#include &quot;libtorrent/create_torrent.hpp&quot;
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#include &lt;boost/filesystem/operations.hpp&gt;
#include &lt;boost/filesystem/path.hpp&gt;
#include &lt;boost/filesystem/fstream.hpp&gt;
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#include &lt;boost/bind.hpp&gt;
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using namespace boost::filesystem;
using namespace libtorrent;
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// do not include files and folders whose
// name starts with a .
bool file_filter(boost::filesystem::path const&amp; filename)
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{
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if (filename.leaf()[0] == '.') return false;
std::cerr &lt;&lt; filename &lt;&lt; std::endl;
return true;
}
void print_progress(int i, int num)
{
std::cerr &lt;&lt; &quot;\r&quot; &lt;&lt; (i+1) &lt;&lt; &quot;/&quot; &lt;&lt; num;
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}
int main(int argc, char* argv[])
{
using namespace libtorrent;
using namespace boost::filesystem;
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int piece_size = 256 * 1024;
char const* creator_str = &quot;libtorrent&quot;;
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path::default_name_check(no_check);
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if (argc != 4 &amp;&amp; argc != 5)
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{
std::cerr &lt;&lt; &quot;usage: make_torrent &lt;output torrent-file&gt; &quot;
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&quot;&lt;announce url&gt; &lt;file or directory to create torrent from&gt; &quot;
&quot;[url-seed]\n&quot;;
return 1;
}
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#ifndef BOOST_NO_EXCEPTIONS
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try
{
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#endif
file_storage fs;
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()
, boost::bind(&amp;print_progress, _1, t.num_pieces()));
std::cerr &lt;&lt; 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);
bencode(std::ostream_iterator&lt;char&gt;(out), t.generate());
#ifndef BOOST_NO_EXCEPTIONS
}
catch (std::exception&amp; e)
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{
std::cerr &lt;&lt; e.what() &lt;&lt; &quot;\n&quot;;
}
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#endif
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return 0;
}
</pre>
</div>
</div>
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</div>
<div id="footer">
<span>Copyright &copy; 2005 Rasterbar Software.</span>
</div>
</div>
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</script>
<script type="text/javascript">
_uacct = "UA-1599045-1";
urchinTracker();
</script>
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</div>
</body>
</html>