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Description:

aria2p 0.12.0

aria2p

Command-line tool and Python library to interact with an aria2c daemon process through JSON-RPC.

To avoid confusion:

aria2 is a lightweight multi-protocol & multi-source, cross platform download utility operated in command-line.
It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink.
aria2c is the name of the command-line executable provided by aria2. It can act as a daemon.
aria2p (p for Python) is a command-line client that can interact with an aria2c daemon.
It is not an official client. There are other Python packages allowing you to interact with an aria2c daemon.
These other packages do not offer enough usability (in my opinion), this is why I'm developing aria2p.

Purpose: aria2c can run in the foreground, for one-time downloads, or in the background, as a daemon.
This is where aria2p intervenes: when an instance of aria2c is running in the background,
aria2p will be able to communicate with it to add downloads to the queue, remove, pause or resume them, etc.
In order for aria2p to be able to communicate with the aria2c process, RPC mode must be enabled
with the --enable-rpc option of aria2c. RPC stands for Remote Procedure Call.
Although aria2c supports both JSON-RPC and XML-RPC protocols, aria2p works with JSON only (not XML).
More information about how to configure aria2c to run as a daemon with RPC mode enabled
can be found in the Configuration section of the documentation.
Table of contents

Requirements
Installation
Usage as a library
Usage on the command line
Troubleshoot
Support

Requirements
aria2 must be installed. On systems with apt-get:
sudo apt-get install aria2

Installation
With pip:
python3.6 -m pip install aria2p[tui]

With pipx:
python3.8 -m pip install --user pipx
pipx install aria2p[tui]

The tui extra is needed for the interactive interface. If you don't need the interface (for example when you are
writing a Python package with a dependency to aria2p), simply install aria2p without any extra.
Usage (as a library)
This library is still a work in progress. More examples will be added later.
In the meantime, you can read the Reference section on the official documentation.
import aria2p

# initialization, these are the default values
aria2 = aria2p.API(
aria2p.Client(
host="http://localhost",
port=6800,
secret=""
)
)

# list downloads
downloads = aria2.get_downloads()

for download in downloads:
print(download.name, download.download_speed)

# add downloads
magnet_uri = "magnet:?xt=urn:..."

download = aria2.add_magnet(magnet_uri)

Usage (command-line)
usage: aria2p [GLOBAL_OPTS...] COMMAND [COMMAND_OPTS...]

Command-line tool and Python library to interact with an `aria2c` daemon
process through JSON-RPC.

Global options:
-h, --help Show this help message and exit. Commands also accept
the -h/--help option.
-p PORT, --port PORT Port to use to connect to the remote server.
-H HOST, --host HOST Host address for the remote server.
-s SECRET, --secret SECRET
Secret token to use to connect to the remote server.
-L {TRACE,DEBUG,INFO,SUCCESS,WARNING,ERROR,CRITICAL}, --log-level {TRACE,DEBUG,INFO,SUCCESS,WARNING,ERROR,CRITICAL}
Log level to use
-P LOG_PATH, --log-path LOG_PATH
Log path to use. Can be a directory or a file.
-T CLIENT_TIMEOUT, --client-timeout CLIENT_TIMEOUT
Timeout in seconds for requests to the remote server.
Floats supported. Default: 60.0.

Commands:

add Add downloads with URIs/Magnets/torrents/Metalinks.
add-magnets (add-magnet)
Add downloads with Magnet URIs.
add-metalinks (add-metalink)
Add downloads with Metalink files.
add-torrents (add-torrent)
Add downloads with torrent files.
autopurge (autoclear)
Automatically purge completed/removed/failed
downloads.
call Call a remote method through the JSON-RPC client.
pause (stop) Pause downloads.
remove (rm, del, delete)
Remove downloads.
resume (start) Resume downloads.
show Show the download progression.
top Launch the top-like interactive interface.
listen Listen to notifications.

Calling aria2p without any arguments will by default call the top command,
which is a console interactive interface.
Commands:

add
add-magnets
add-metalinks
add-torrents
autopurge
call
listen
pause
remove
resume
show
top

add
usage: aria2p add [-h] [-f FROM_FILE] [uris [uris ...]]

Add downloads with URIs/Magnets/torrents/Metalinks.

positional arguments:
uris The URIs/file-paths to add.

optional arguments:
-h, --help Show this help message and exit.
-f FROM_FILE, --from-file FROM_FILE
Load URIs from a file.

add-magnets
usage: aria2p add-magnets [-h] [-f FROM_FILE] [uris [uris ...]]

Add downloads with Magnet URIs.

positional arguments:
uris The magnet URIs to add.

optional arguments:
-h, --help Show this help message and exit.
-f FROM_FILE, --from-file FROM_FILE
Load URIs from a file.

add-metalinks
usage: aria2p add-metalinks [-h] [-f FROM_FILE]
[metalink_files [metalink_files ...]]

Add downloads with Metalink files.

positional arguments:
metalink_files The paths to the metalink files.

optional arguments:
-h, --help Show this help message and exit.
-f FROM_FILE, --from-file FROM_FILE
Load file paths from a file.

add-torrents
usage: aria2p add-torrents [-h] [-f FROM_FILE]
[torrent_files [torrent_files ...]]

Add downloads with torrent files.

positional arguments:
torrent_files The paths to the torrent files.

optional arguments:
-h, --help Show this help message and exit.
-f FROM_FILE, --from-file FROM_FILE
Load file paths from a file.

autopurge
usage: aria2p autopurge [-h]

Automatically purge completed/removed/failed downloads.

optional arguments:
-h, --help Show this help message and exit.

call
usage: aria2p call [-h] [-P PARAMS [PARAMS ...] | -J PARAMS] method

Call a remote method through the JSON-RPC client.

positional arguments:
method The method to call (case insensitive). Dashes and
underscores will be removed so you can use as many as
you want, or none. Prefixes like 'aria2.' or 'system.'
are also optional.

optional arguments:
-h, --help Show this help message and exit.
-P PARAMS [PARAMS ...], --params-list PARAMS [PARAMS ...]
Parameters as a list of strings.
-J PARAMS, --json-params PARAMS
Parameters as a JSON string. You should always wrap it
at least once in an array '[]'.

As explained in the help text,
the method can be the exact method name,
or just the name without the prefix.
It is case-insensitive, and dashes and underscores will be removed.
The following are all equivalent:

aria2.addUri
aria2.adduri
addUri
ADDURI
aria2.ADD-URI
add_uri
A-d_D-u_R-i (yes it's valid)
A---R---I---A---2.a__d__d__u__r__i (I think you got it)
and even more ugly forms...

Examples
List all available methods.
This example uses jq.
$ aria2p call listmethods | jq
[
"aria2.addUri",
"aria2.addTorrent",
"aria2.getPeers",
"aria2.addMetalink",
"aria2.remove",
"aria2.pause",
"aria2.forcePause",
"aria2.pauseAll",
"aria2.forcePauseAll",
"aria2.unpause",
"aria2.unpauseAll",
"aria2.forceRemove",
"aria2.changePosition",
"aria2.tellStatus",
"aria2.getUris",
"aria2.getFiles",
"aria2.getServers",
"aria2.tellActive",
"aria2.tellWaiting",
"aria2.tellStopped",
"aria2.getOption",
"aria2.changeUri",
"aria2.changeOption",
"aria2.getGlobalOption",
"aria2.changeGlobalOption",
"aria2.purgeDownloadResult",
"aria2.removeDownloadResult",
"aria2.getVersion",
"aria2.getSessionInfo",
"aria2.shutdown",
"aria2.forceShutdown",
"aria2.getGlobalStat",
"aria2.saveSession",
"system.multicall",
"system.listMethods",
"system.listNotifications"
]

List the GIDs (identifiers) of all active downloads.
Note that we must give the parameters as a JSON string.
$ aria2p call tellactive -J '[["gid"]]'
[{"gid": "b686cad55029d4df"}, {"gid": "4b39a1ad8fd94e26"}, {"gid": "9d331cc4b287e5df"}, {"gid": "8c9de0df753a5195"}]

Pause a download using its GID.
Note that when a single string argument is required, it can be passed directly with -P.
$ aria2p call pause -P b686cad55029d4df
"b686cad55029d4df"

Add a download using magnet URIs.
This example uses jq -r to remove the quotation marks around the result.
$ aria2p call adduri -J '[["magnet:?xt=urn:..."]]' | jq -r
4b39a1ad8fd94e26f

Purge download results (remove completed downloads from the list).
$ aria2p call purge_download_result
"OK"

listen
usage: aria2p listen [-h] [-c CALLBACKS_MODULE] [-t TIMEOUT]
[event_types [event_types ...]]

Listen to notifications.

positional arguments:
event_types The types of notifications to process: start, pause,
stop, error, complete or btcomplete. Example: aria2p
listen error btcomplete. Useful if you want to spawn
multiple specialized aria2p listener, for example one
for each type of notification, but still want to use
only one callback file.

optional arguments:
-h, --help Show this help message and exit.
-c CALLBACKS_MODULE, --callbacks-module CALLBACKS_MODULE
Path to the Python module defining your notifications
callbacks.
-t TIMEOUT, --timeout TIMEOUT
Timeout in seconds to use when waiting for data over
the WebSocket at each iteration. Use small values for
faster reactivity when stopping to listen.

pause
usage: aria2p pause [-h] [-a] [-f] [gids [gids ...]]

Pause downloads.

positional arguments:
gids The GIDs of the downloads to pause.

optional arguments:
-h, --help Show this help message and exit.
-a, --all Pause all the downloads.
-f, --force Pause without contacting servers first.

remove
usage: aria2p remove [-h] [-a] [-f] [gids [gids ...]]

Remove downloads.

positional arguments:
gids The GIDs of the downloads to remove.

optional arguments:
-h, --help Show this help message and exit.
-a, --all Remove all the downloads.
-f, --force Remove without contacting servers first.

resume
usage: aria2p resume [-h] [-a] [gids [gids ...]]

Resume downloads.

positional arguments:
gids The GIDs of the downloads to resume.

optional arguments:
-h, --help Show this help message and exit.
-a, --all Resume all the downloads.

show
usage: aria2p show [-h]

Show the download progression.

optional arguments:
-h, --help Show this help message and exit.

top
usage: aria2p top [-h]

Launch the top-like interactive interface.

optional arguments:
-h, --help Show this help message and exit.

Troubleshooting

Error outputs like below when using aria2p as a Python library:
requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=6800): Max retries exceeded with url: /jsonrpc (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x1115b1908>: Failed to establish a new connection: [Errno 61] Connection refused',))

Solution: aria2c needs to be up and running first.

Support
To support me as an open-source software author,
consider donating or be a supporter through one of the following platforms

GitHub
Ko-fi
Liberapay
Patreon
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Thank you!