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merged make_magnet_uri fix from RC_0_16

This commit is contained in:
Arvid Norberg 2013-04-27 21:11:12 +00:00
parent dc226eab80
commit a187d09bbf
2 changed files with 7 additions and 4 deletions
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1
ChangeLog
View File

@ -20,6 +20,7 @@
* fix uTP edge case where udp socket buffer fills up
* fix nagle implementation in uTP
* fix crash in make_magnet_uri when generating links longer than 1024 characters
* fix hanging issue when closing files on windows (completing a download)
* fix piece picking edge case that could cause torrents to get stuck at hash failure
* try unencrypted connections first, and fall back to encryption if it fails (performance improvement)

10
src/magnet_uri.cpp
View File

@ -44,7 +44,7 @@ namespace libtorrent
{
if (!handle.is_valid()) return "";
char ret[1024];
char ret[2048];
sha1_hash const& ih = handle.info_hash();
int num_chars = snprintf(ret, sizeof(ret), "magnet:?xt=urn:btih:%s"
, to_hex(ih.to_string()).c_str());
@ -52,7 +52,7 @@ namespace libtorrent
torrent_status st = handle.status(torrent_handle::query_name);
std::string name = st.name;
if (!name.empty())
if (!name.empty() && sizeof(ret) - 5 > num_chars)
num_chars += snprintf(ret + num_chars, sizeof(ret) - num_chars, "&dn=%s"
, escape_string(name.c_str(), name.length()).c_str());
@ -60,6 +60,7 @@ namespace libtorrent
for (std::vector<announce_entry>::const_iterator i = tr.begin(), end(tr.end()); i != end; ++i)
{
if (num_chars >= sizeof(ret)) break;
num_chars += snprintf(ret + num_chars, sizeof(ret) - num_chars, "&tr=%s"
, escape_string(i->url.c_str(), i->url.length()).c_str());
}
@ -69,20 +70,21 @@ namespace libtorrent
std::string make_magnet_uri(torrent_info const& info)
{
char ret[1024];
char ret[2048];
sha1_hash const& ih = info.info_hash();
int num_chars = snprintf(ret, sizeof(ret), "magnet:?xt=urn:btih:%s"
, to_hex(ih.to_string()).c_str());
std::string const& name = info.name();
if (!name.empty())
if (!name.empty() && sizeof(ret) - 5 > num_chars)
num_chars += snprintf(ret + num_chars, sizeof(ret) - num_chars, "&dn=%s"
, escape_string(name.c_str(), name.length()).c_str());
std::vector<announce_entry> const& tr = info.trackers();
for (std::vector<announce_entry>::const_iterator i = tr.begin(), end(tr.end()); i != end; ++i)
{
if (num_chars >= sizeof(ret)) break;
num_chars += snprintf(ret + num_chars, sizeof(ret) - num_chars, "&tr=%s"
, escape_string(i->url.c_str(), i->url.length()).c_str());
}