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premiere-libtorrent
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extended utf-8 encoding error correction to also cover name, comment and created by. Fixes #372

This commit is contained in:
Arvid Norberg 2008-12-31 10:18:19 +00:00
parent e01f628b8e
commit aecc24171d
3 changed files with 19 additions and 5 deletions
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2
ChangeLog
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@ -34,6 +34,8 @@ release 0.14.2
renamed file names instead of the original file names in the torrent.
* documentation fix of queing section
* fixed potential issue in udp_socket (affected udp tracker support)
* made name, comment and created by also be subject to utf-8 error
correction (filenames already were)
release 0.14.1

1
examples/dump_torrent.cpp
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@ -107,6 +107,7 @@ int main(int argc, char* argv[])
std::cout << "comment: " << t.comment() << "\n";
std::cout << "created by: " << t.creator() << "\n";
std::cout << "magnet link: " << make_magnet_uri(t) << "\n";
std::cout << "name: " << t.name() << "\n";
std::cout << "files:\n";
int index = 0;
for (torrent_info::file_iterator i = t.begin_files();

21
src/torrent_info.cpp
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@ -75,13 +75,12 @@ namespace
str += 0x80 | (chr & 0x3f);
}
void verify_encoding(file_entry& target)
bool verify_encoding(std::string& target)
{
std::string tmp_path;
std::string file_path = target.path.string();
bool valid_encoding = true;
for (std::string::iterator i = file_path.begin()
, end(file_path.end()); i != end; ++i)
for (std::string::iterator i = target.begin()
, end(target.end()); i != end; ++i)
{
// valid ascii-character
if ((*i & 0x80) == 0)
@ -154,7 +153,14 @@ namespace
// save the original encoding and replace the
// commonly used path with the correctly
// encoded string
if (!valid_encoding) target.path = tmp_path;
if (!valid_encoding) target = tmp_path;
return valid_encoding;
}
void verify_encoding(file_entry& target)
{
std::string p = target.path.string();
if (!verify_encoding(p)) target.path = p;
}
void trim_path_element(std::string& path_element)
@ -489,6 +495,9 @@ namespace libtorrent
error = "invalid 'name' of torrent (possible exploit attempt)";
return false;
}
// correct utf-8 encoding errors
verify_encoding(name);
// extract file list
lazy_entry const* i = info.dict_find_list("files");
@ -669,9 +678,11 @@ namespace libtorrent
m_comment = torrent_file.dict_find_string_value("comment.utf-8");
if (m_comment.empty()) m_comment = torrent_file.dict_find_string_value("comment");
verify_encoding(m_comment);
m_created_by = torrent_file.dict_find_string_value("created by.utf-8");
if (m_created_by.empty()) m_created_by = torrent_file.dict_find_string_value("created by");
verify_encoding(m_created_by);
lazy_entry const* info = torrent_file.dict_find_dict("info");
if (info == 0)