BitComet 2.21 绿色版 - BitTorrent 客户端

BitComet 是一个功能强大的免费 BitTorrent 客户端，支持多种协议，包括 BitTorrent、HTTP 和 FTP。它可以高速下载和上传文件，通过智能磁盘缓存减少硬盘负荷，并支持断点续传、大文件分割下载、队列下载、计划任务、远程Web管理以及浏览器集成等功能。BitComet 还内置了在线视频播放器，并提供 P2P 文件共享的高效搜索和管理工具，使用户可以更便捷地下载和共享文件。其用户界面友好，操作简单，适合各类用户使用。

官方网站：https://www.bitcomet.com/

截屏

BitComet 截屏

功能摘要

快速下载
- 使用多线程技术和优化算法，可以实现高速的下载速度，提供快速的文件下载体验。
多任务下载
- 支持同时下载多个任务，用户可以同时下载多个Torrent文件，提高下载效率。
自动下载
- 可以根据用户设置的规则自动下载指定的Torrent文件，省去手动添加下载任务的步骤。
队列管理
- 可以对下载任务进行队列管理，根据用户的优先级和设置，自动调整下载顺序，保证重要任务优先下载。
断点续传
- 如果下载中断或暂停，BitComet可以自动恢复下载进度，从上次的断点处继续下载，节省时间和流量。
文件管理
- 提供了一个简单而直观的界面，用户可以轻松地搜索、选择和管理下载文件，包括暂停、取消、删除等操作。
浏览器插件
- 提供了浏览器插件，允许用户直接从网页上下载Torrent文件，方便快捷。
远程控制
- 支持远程控制功能，用户可以通过远程设备监控和管理下载任务，无论身在何处都可以掌握下载进度。

更新日志

https://www.cometbbs.com

Version 2.21

GUI Improved: Added advanced setting options: bittorrent.transfer_thread_pool, using worker threads for BT transmission encryption and decryption operations, disabled by default
GUI Improved: Added advanced setting options: bittorrent. advertising. external. utp-port, which notifies the external uTP port through PEX in NAT1 environment, defaults to true
GUI Improved: Added advanced setting options: dht.outbound_pps_imit, dht.outbound_pending_request_limit, dht.passive_reply_pps_limit, dht.passive_reply_pending_limit
GUI Improved: Remove advanced setting option: dht.udc_send_queue_threshold
GUI Improved: Added advanced settings option: network.udp_stocket_buffer_size_mb, default to 8MB
GUI Improved: The default value of advanced settings option network.max_connecting_connections_per_tracker changed to 0 (automatic)
GUI Improved: Added categories of "BT transmission thread", "DHT thread", and "uTP thread" to the CPU usage statistics in the traffic graph
GUI Improved: Add uTP Port column to the peer list of BT task, hidden by default
GUI Improved: The Add Peer dialog box in peer list of BT Task supports # and // inline comments
GUI Improved: Improve the window dark mode switching mechanism
GUI Improved: Added options in Remote Access Page: Local client bypass authentication, IP whitelist clients bypass authentication
GUI Improved: Added command-line parameter --profile, which can specify the program configuration file directory for independent testing
GUI Improved: The number of HTTP Tracker connections in the statistics page is divided into two categories: pending and half open
GUI Improved: Add DHT packet status information to the UDP transmission status in the statistics page
GUI Improved: Added uTP external port monitoring information to the statistics page
GUI Improved: In expert mode, add the local external IP: utp-port obtained through PEX as a separate line to the peer list for diagnosis, but do not initiate a connection to oneself
GUI Improved: When creating torrent files, prioritize using the DHT nodes filled in by the user, and later use the current active DHT nodes
GUI Bugfix: After reconnecting to the remote desktop, the display position of the traffic map panel toolbar is misaligned
GUI Bugfix: LSD countdown in tracker list is inaccurate when the number of tasks is large
GUI Bugfix: In expert mode, the Infohash display in the value list of DHT network is incorrect
GUI Bugfix: RSS auto downloader does not use the default download directory for task tags when using RSS feed titles as task tags
Core Improved: Optimize the code for BT transmission encryption and decryption operations in worker threads, reducing CPU usage
Core Improved: Optimize the scheduling algorithm for initiating TCP connections, improve the processing speed of transferring pending queues to half open queues, and balance the handling of different connection types
Core Improved: Optimize the dynamic adjustment algorithm for the MTU of uTP packets at the sender end
Core Improved: Optimize uTP LEDBAT congestion control algorithm, reduce CPU usage, and improve upload speed
Core Improved: When BT task is connected to uTP, if there is no real interaction within 10 seconds after the complete metadata is sent, it will be disconnected
Core Improved: The maximum interval for tracker announcements has been changed to 180 minutes, with jitter of ±3 minutes
Core Improved: UDP tracker improves Connection ID timeout update and error handling
Core Improved: Improve the IP filter disconnection handling of BT protocol and long-term seeding protocol for TCP and UDP connections
Core Improved: Optimize DHT packet sending control to reduce the impact of high peak UDP packet rates and session counts on network devices
Core Improved: BT Handshake Extension Protocol adds yourport field, which returns the observed external uTP port of the other party when receiving an incoming uTP connection
Core Improved: After manually performing NAT type detection, record the detected external UDP ports for future use
Core Improved: When replying to DHT announce_peer messages, refer to the BEP42 format and return the request source IP: port observed by this node in the top-level IP field
Core Improved: When receiving DHT responses, process the locally visible UDP endpoint returned by the other party through the BEP42 IP field; Multiple DHT nodes need to cross confirm before acceptance, reducing the risk of a single malicious or erroneous node contaminating external uTP ports
Core Improved: When announcing one's external uTP port through PEX, data sources from BitComet extended handshake Yourport, PEX backhaul, and trusted DHT BEP42 backhaul can be used
Core Improved: When DHT replies to get_piers, attach nodes nodes
Core Improved: When DHT receives a reply from get_piers, it ignores the node distance and performs an additional extended query on the attached nodes
Core Improved: When DHT uses domain nodes for bootstrap, it immediately adds the node to the list after resolving the domain name, and then waits for the node to reply
Core Bugfix: When BT task disk cache reaches its limit and uploads to multiple peers, the disk read speed is much faster than the upload speed
Core Bugfix: When the number of TCP initiated connections is too high, there is packet loss on the TCP port
Core Bugfix: HTTP Tracker avoids repeatedly initiating connections when they are pending
Core Bugfix: Optimize DHT packet control and eliminate the delay of the first announcement when tasks start
Core Bugfix: After UDP Tracker Domain DNS resolve, sends request only to the first record when there are multiple records
Core Bugfix: DHT Tracker lacks the get_peers step when manually announcing
Core Bugfix: DHT should not send announcements to nodes that have not received tokens
WebUI: Optimizing pagination loading of task lists and file lists
WebUI: CPU usage statistics in traffic graph add categories of "BT transmission thread", "DHT thread", and "uTP thread"
WebUI: Add Options in Remote Access Page: Local client bypass authentication, whitelist clients bypass authentication
WebUI: Fixed the issue where information cannot be copied to the system clipboard when accessing pages via HTTP+IP
WebUI: Add the "Copy Download Link" command to the right-click menu of the file list
WebUI: Add uTP Port column to the peer list of BT task, hidden by default

Version 2.20

GUI Improved: Add a filter input box to the file list page
GUI Improved: Add a filter input box to the file list in the BT task properties dialog
GUI Improved: After enabling the "Create subdirectory for torrents with only a single file" option in the BT task, the task name in the task list is also displayed using "subdirectory name"
GUI Improved: Add advanced settings options: ui.copy_magnet_with_base32_infohash
GUI Improved: Add advanced settings options: bittorrent.http_tracker
GUI Improved: Add advanced settings options: network.rss_http_visit_interval, 100ms as default
GUI Improved: When creating torrent files, support piece size of 128MB and 256MB
GUI Improved: The default value for the minimum cache size in the advanced settings has been changed from 64MB to 256MB
GUI Improved: When there are a large number of files in a BT task, the file download order list in the task properties dialog displays slowly
Core Improved: When reducing the number of connections during HTTP task downloading, priority should be given to retaining connections with higher download speeds
Core Bugfix: Loading fails when the size of the piece_part file exceeds 4GB
Core Bugfix: When the header and tail pieces of video files cannot be downloaded, the sequential download request algorithm becomes ineffective
WebUI：Add task name filtering function to the task list
WebUI：Supports batch addition of BT download tasks with multiple lines of magnet links
WebUI：The task list adopts paging loading to reduce network traffic
WebUI：Add query items to the statistics page interface: G_TOTAL_DOWNLOAD_BYTE、G_TOTAL_UPLOAD_BYTE、G_SESSION_DOWNLOAD_BYTE、G_SESSION_UPLOAD_BYTE
WebUI：Change the video file selection window to a fixed width
WebUI：The issue of being unable to select files in the video file selection window has been fixed
WebUI：The button list and task search box in the top menu bar automatically wrap and display according to the width of the window
WebUI：When reloading the page, preserve the sorting status of the task list
WebUI：Optimize the width of each column in the task list and video file list

Version 2.18

GUI Improved: Remove code related to IE browser plugins
GUI Improved: Remove the TCP/IP connection limit page in options dialog for Windows XP and Vista
GUI Improved: Add a 'Untagged' button to the label toolbar above the task list
GUI Improved: The IP filter page in options dialog has been changed to a tab layout
GUI Improved: Added advanced setting: torrent_share.unload_memory_when_disabled
GUI Bugfix: When the torrent list is disabled, clicking the corresponding item in the left tree list should not load data
GUI Bugfix: When the task list is sorted by health, tasks that are seeding are not sorted correctly.
GUI Bugfix: After the system resumes from Sleep, the main window's tray minimized state behaves abnormally.
Core Improved: Upgrade dependencies boost and rapidjson
Core Bugfix: When WebUI bans a peer, operations fail for peers with unknown listening ports.
Core Bugfix: Downloading files with special characters in their names from the WebUI file list will fail.
Core Bugfix: Restore support for the Windows XP platform
WebUI：Add Ctrl+A to select all items in the task list
WebUI：Add BT task settings page in the options window
WebUI：Add Long-Term seeding settings page in the options window
WebUI：Add Tracker settings page in the options window
WebUI：The IP filter page in options window has been changed to a tab layout
WebUI：Add disk cache settings page in the options window
WebUI：Add Scheduler settings page in the options window
WebUI：Add up and down move buttons to the client filter page in options window
WebUI：Playing video files supports calling the local player
Package: Remove IE browser add-on options

Version 2.17

GUI Improved: The BT task properties dialog's advanced page adds a separate anti-leech option, which has a higher priority than the global settings.
GUI Improved: The BT task properties dialog's advanced page adds a separate 'Enable tracker' option to control HTTP/UDP/WS trackers.
GUI Improved: Added advanced setting: network.preferred_network_adapter
GUI Improved: Add a rename shortcut F2 to the task list
GUI Improved: For task lists and other sortable lists, add a 'Reset Sorting' feature to the header right-click menu.
GUI Improved: After subscribing to the VIP membership in the Android app, the desktop version shows the VIP icon on the passport page at the bottom left corner. The progress bar bubble displays the points level, and the bubble with the level badge shows the valid level.
WebUI：Add a video file preview button column and a file count column (hidden by default) to the task list
WebUI：Add a video file preview button column to the file list
WebUI：Add file download function to the file list context menu
WebUI：Add online video playback function to the context menu of the file list
WebUI：The video playback window supports loading subtitle files (vtt, srt, ass formats)
WebUI："About" dialog displays architecture information
WebUI：Fix the issue where the task list selection is misaligned when there are too many tasks.
Core Improved: WebUI connection adds ETag and Cache-Control caching mechanism
Core Bugfix: DNS resolution issues are causing the program to fail to exit.
Core Bugfix: When opening a torrent to create a BT task, the configuration file save location is incorrect.
Core Bugfix: The HTTP server module returns incorrect data when handling a large number of concurrent short connections.

Version 2.16

2025-08-23
GUI Improved: Add task type filter to the left sidebar.
GUI Improved: Add ED2K hash information column to the file list.
GUI Improved: The context menu of the file list allows to copy the ED2K link of the selected file.
GUI Improved: Always display the global log, no need to enable expert mode to display it.
GUI Improved: The options window tracker list is divided into two input fields: manual and subscription.
GUI Improved: Add advanced settings options: system.config_autosave_interval_min
GUI Improved: Add advanced settings options: bittorrent.enable_sequential_download_mode_for_new_task
GUI Improved: The max limit of network.max_connecting_connections changed to 60000
GUI Improved: When system.config_autosave_interval_min set to 0, the auto-save function is disabled.
GUI Improved: The BT task properties dialog box adds an option to create a subdirectory for single file torrent.
GUI Improved: The BT task page of options window adds an option to create a subdirectory for single file torrent when adding BT tasks.
GUI Improved: Update the country/region flags in the peer list
GUI Bugfix: The CPU usage in global statistics sometimes shows as "-".
GUI Bugfix: Global statistics do not show the situation of DHT being disabled.
GUI Bugfix: When exiting the Linux desktop version in full screen mode, the width of the left sidebar is incorrect on the next startup.
GUI Bugfix: After the system resumes from Sleep, there is an issue with the Dark Mode toolbar display.
WebUI：Add task type filter to the left sidebar.
WebUI：In some cases, the height of the left sidebar display area is incorrect.
WebUI：Add BT task page to the options window.
WebUI：When creating a new BT task, disable the automatic renaming feature.
WebUI：If a file with the same name already exists in the Docker version, it will not display a hash check prompt and will directly perform the hash check.
WebUI：Fix the issue where the task is not refreshed in a timely manner after deletion.
WebUI：support the request without all fields of connection configuration modification.
Core Improved: The WebUI connection uses Keep-Alive.
Core Improved: Improve HTTP redirection handling
Core Improved: Upgrade the boost version
Core Improved: Upgrade sqlite version
Core Improved: Adjust the TCP connection priority of the HTTP download task
Core Improved: Handle the situation of memory allocation failure when loading the torrent market database.
Core Improved: Enhance the stability of cloud service for remote connection.
Core Bugfix: When the default action of the client filter's manual rule list is set to allow, the rules in the subscription list will be skipped.
Core Bugfix: The metadata status in torrent history list and my shared list has incorrect information.
Core Bugfix: The cumulative upload and download amounts on the statistics page are incorrect.
Core Bugfix: Improve the detection of the server's resume capability for HTTP download tasks.
Core Bugfix: The filtering of the task lists in the remote connection from Android App and the WebUI will affect each other.
Core Bugfix: Improve the error handling of adding magnetic link from WebUI.