Python-libtorrent

* deprecated add_torrent() in favor of a new add_torrent()
that takes a struct with parameters instead. Torrents
are paused and auto managed by default.
* removed 'connecting_to_tracker' torrent state. This changes
the enum values for the other states.
* Improved seeding and choking behavior.
* Fixed rare buffer overrun bug when calling get_download_queue
* Fixed rare bug where torrent could be put back into downloading
state even though it was finished, after checking files.
* Fixed rename_file to work before the file on disk has been
created.
* Fixed bug in tracker connections in case of errors caused
in the connection constructor.
* Updated alert system to be filtered by category instead of
severity level. Alerts can generate a message through
alert::message().
* Session constructor will now start dht, upnp, natpmp, lsd by
default. Flags can be passed in to the constructor to not
do this, if these features are to be enabled and disabled
at a later point.
* Removed 'connecting_to_tracker' torrent state
* Fix bug where FAST pieces were cancelled on choke
* Fixed problems with restoring piece states when hash failed.
* Minimum peer reconnect time fix. Peers with no failures would
reconnect immediately.
* Improved web seed error handling
* DHT announce fixes and off-by-one loop fix
* Fixed UPnP xml parse bug where it would ignore the port number
for the control url.
* Fixed bug in torrent writer where the private flag was added
outside of the info dictionary
* Made the torrent file parser less strict of what goes in the
announce-list entry
* Fixed type overflow bug where some statistics was incorrectly
reported for file larger than 2 GB
* boost-1.35 support
* Fixed bug in statistics from web server peers where it sometimes
could report too many bytes downloaded.
* Fixed bug where statistics from the last second was lost when
disconnecting a peer.
* receive buffer optimizations (memcpy savings and memory savings)
* Support for specifying the TOS byte for peer traffic.
* Basic support for queueing of torrents.
* Better bias to give connections to downloading torrents
with fewer peers.
* Optimized resource usage (removed the checking thread)
* Support to bind outgoing connections to specific ports
* Disk cache support.
* New, more memory efficient, piece picker with sequential download
support (instead of the more complicated sequential download threshold).
* Auto Upload slots. Automtically opens up more slots if
upload limit is not met.
* Improved NAT-PMP support by querying the default gateway
* Improved UPnP support by ignoring routers not on the clients subnet.

* Added scrape support
* Added add_extension() to torrent_handle. Can instantiate
extensions for torrents while downloading
* Added support for remove_torrent to delete the files as well
* Fixed issue with failing async_accept on windows
* DHT improvements, proper error messages are now returned when
nodes sends bad packets
* Optimized the country table used to resolve country of peers
* Copying optimization for sending data. Data is no longer copied from
the disk I/O buffer to the send buffer.
* Buffer optimization to use a raw buffer instead of std::vector<char>
* Improved file storage to use sparse files
* Updated python bindings
* Added more clients to the identifiable clients list.
* Torrents can now be started in paused state (to better support queuing)
* Improved IPv6 support (support for IPv6 extension to trackers and
listens on both IPv6 and IPv4 interfaces).
* Improved asserts used. Generates a stacktrace on linux
* Piece picker optimizations and improvements
* Improved unchoker, connection limit and rate limiter
* Support for FAST extension
* Fixed invalid calculation in DHT node distance
* Fixed bug in URL parser that failed to parse IPv6 addresses
* added peer download rate approximation
* added port filter for outgoing connection (to prevent
triggering firewalls)
* made most parameters configurable via session_settings
* added encryption support
* added parole mode for peers whose data fails the hash check.
* optimized heap usage in piece-picker and web seed downloader.
* fixed bug in DHT where older write tokens weren't accepted.
* added support for sparse files.
* introduced speed categories for peers and pieces, to separate
slow and fast peers.
* added a half-open tcp connection limit that takes all connections
in to account, not just peer connections.
* added alerts for filtered IPs.
* added support for SOCKS4 and 5 proxies and HTTP CONNECT proxies.
* fixed proper distributed copies calculation.
* added option to use openssl for sha-1 calculations.
* optimized the piece picker in the case where a peer is a seed.
* added support for local peer discovery
* removed the dependency on the compiled boost.date_time library
* deprecated torrent_info::print()
* added UPnP support
* fixed problem where peer interested flags were not updated correctly
when pieces were filtered
* improvements to ut_pex messages, including support for seed flag
* prioritizes upload bandwidth to peers that might send back data
* the following functions have been deprecated:
void torrent_handle::filter_piece(int index, bool filter) const;
void torrent_handle::filter_pieces(std::vector<bool> const& pieces) const;
bool torrent_handle::is_piece_filtered(int index) const;
std::vector<bool> torrent_handle::filtered_pieces() const;
void torrent_handle::filter_files(std::vector<bool> const& files) const;

instead, use the piece_priority functions.

* added support for NAT-PMP
* added support for piece priorities. Piece filtering is now set as
a priority
* Fixed crash when last piece was smaller than one block and reading
fastresume data for that piece
* Makefiles should do a better job detecting boost
* Fixed crash when all tracker urls are removed
* Log files can now be created at user supplied path
* Log files failing to create is no longer fatal
* Fixed dead-lock in torrent_handle
* Made it build with boost 1.34 on windows
* Fixed bug in URL parser that failed to parse IPv6 addresses
* Fixed bug in DHT, related to IPv6 nodes
* DHT accepts transaction IDs that have garbage appended to them
* DHT logs messages that it fails to decode

* fixes to make the DHT more compatible
* http seed improvements including error reporting and url encoding issues.
* fixed bug where directories would be left behind when moving storage
in some cases.
* fixed crashing bug when restarting or stopping the DHT.
* added python binding, using boost.python
* improved character conversion on windows when strings are not utf-8.
* metadata extension now respects the private flag in the torrent.
* made the DHT to only be used as a fallback to trackers by default.
* added support for HTTP redirection support for web seeds.
* fixed race condition when accessing a torrent that was checking its
fast resume data.
* fixed a bug in the DHT which could be triggered if the network was
dropped or extremely rare cases.
* if the download rate is limited, web seeds will now only use left-over
bandwidth after all bt peers have used up as much bandwidth as they can.
* added the possibility to have libtorrent resolve the countries of
the peers in torrents.
* improved the bandwidth limiter (it now implements a leaky bucket/node bucket).
* improved the HTTP seed downloader to report accurate progress.
* added more client peer-id signatures to be recognized.
* added support for HTTP servers that skip the CR before the NL at line breaks.
* fixed bug in the HTTP code that only accepted headers case sensitive.
* fixed bug where one of the session constructors didn't initialize boost.filesystem.
* fixed bug when the initial checking of a torrent fails with an exception.
* fixed bug in DHT code which would send incorrect announce messages.
* fixed bug where the http header parser was case sensitive to the header
names.
* Implemented an optmization which frees the piece_picker once a torrent
turns into a seed.
* Added support for uT peer exchange extension, implemented by Massaroddel.
* Modified the quota management to offer better bandwidth balancing
between peers.
* logging now supports multiple sessions (different sessions now log
to different directories).
* fixed random number generator seed problem, generating the same
peer-id for sessions constructed the same second.
* added an option to accept multiple connections from the same IP.
* improved tracker logging.
* moved the file_pool into session. The number of open files is now
limited per session.
* fixed uninitialized private flag in torrent_info
* fixed long standing issue with file.cpp on windows. Replaced the low level
io functions used on windows.
* made it possible to associate a name with torrents without metadata.
* improved http-downloading performance by requesting entire pieces via
http.
* added plugin interface for extensions. And changed the interface for
enabling extensions.

* added support for incorrectly encoded paths in torrent files
(assumes Latin-1 encoding and converts to UTF-8).
* added support for destructing session objects asynchronously.
* fixed bug with file_progress() with files = 0 bytes
* fixed a race condition bug in udp_tracker_connection that could
cause a crash.
* fixed bug occuring when increasing the sequenced download threshold
with max availability lower than previous threshold.
* fixed an integer overflow bug occuring when built with gcc 4.1.x
* fixed crasing bug when closing while checking a torrent
* fixed bug causing a crash with a torrent with piece length 0
* added an extension to the DHT network protocol to support the
exchange of nodes with IPv6 addresses.
* modified the ip_filter api slightly to support IPv6
* modified the api slightly to make sequenced download threshold
a per torrent-setting.
* changed the address type to support IPv6
* fixed bug in piece picker which would not behave as
expected with regard to sequenced download threshold.
* fixed bug with file_progress() with files > 2 GB.
* added --enable-examples option to configure script.
* fixed problem with the resource distribution algorithm
(controlling e.g upload/download rates).
* fixed incorrect asserts in storage related to torrents with
zero-sized files.
* added support for trackerless torrents (with kademlia DHT).
* support for torrents with the private flag set.
* support for torrents containing bootstrap nodes for the
DHT network.
* fixed problem with the configure script on FreeBSD.
* limits the pipelining used on url-seeds.
* fixed problem where the shutdown always would delay for
session_settings::stop_tracker_timeout seconds.
* session::listen_on() won't reopen the socket in case the port and
interface is the same as the one currently in use.
* added http proxy support for web seeds.
* fixed problem where upload and download stats could become incorrect
in case of high cpu load.
* added more clients to the identifiable list.
* fixed fingerprint parser to cope with latest Mainline versions.

* fixed a bug where the requested number of peers in a tracker request could
be too big.
* fixed a bug where empty files were not created in full allocation mode.
* fixed a bug in storage that would, in rare cases, fail to do a
complete check.
* exposed more settings for tweaking parameters in the piece-picker,
downloader and uploader (http_settings replaced by session_settings).
* tweaked default settings to improve high bandwidth transfers.
* improved the piece picker performance and made it possible to download
popular pieces in sequence to improve disk performance.
* added the possibility to control upload and download limits per peer.
* fixed problem with re-requesting skipped pieces when peer was sending pieces
out of fifo-order.
* added support for http seeding (the GetRight protocol)
* renamed identifiers called 'id' in the public interface to support linking
with Objective.C++
* changed the extensions protocol to use the new one, which is also
implemented by uTorrent.
* factorized the peer_connection and added web_peer_connection which is
able to download from http-sources.
* converted the network code to use asio (resulted in slight api changes
dealing with network addresses).
* made libtorrent build in vc7 (patches from Allen Zhao)
* fixed bug caused when binding outgoing connections to a non-local interface.
* add_torrent() will now throw if called while the session object is
being closed.
* added the ability to limit the number of simultaneous half-open
TCP connections. Flags in peer_info has been added.

* made the session disable file name checks within the boost.filsystem library
* fixed race condition in the sockets
* strings that are invalid utf-8 strings are now decoded with the
local codepage on windows
* added the ability to build libtorrent both as a shared library
* client_test can now monitor a directory for torrent files and automatically
start and stop downloads while running
* fixed problem with file_size() when building on windows with unicode support
* added a new torrent state, allocating
* added a new alert, metadata_failed_alert
* changed the interface to session::add_torrent for some speed optimizations.
* greatly improved the command line control of the example client_test.
* fixed bug where upload rate limit was not being applied.
* files that are being checked will no longer stall files that don't need
checking.
* changed the way libtorrent identifies support for its excentions
to look for 'ext' at the end of the peer-id.
* improved performance by adding a circle buffer for the send buffer.
* fixed bugs in the http tracker connection when using an http proxy.
* fixed problem with storage's file pool when creating torrents and then
starting to seed them.
* hard limit on remote request queue and timeout on requests (a timeout
triggers rerequests). This makes libtorrent work much better with
"broken" clients like BitComet which may ignore requests.