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ARIA2C(1)                        Aria2 Manual                        ARIA2C(1)

NAME
       aria2c - The ultra fast download utility

SYNOPSIS
       aria2c [OPTIONS] [URI | MAGNET | TORRENT_FILE | METALINK_FILE]...

DESCRIPTION
       aria2 is a utility for downloading files. The supported protocols are
       HTTP(S), FTP, BitTorrent, and Metalink. aria2 can download a file from
       multiple sources/protocols and tries to utilize your maximum download
       bandwidth. It supports downloading a file from HTTP(S)/FTP and
       BitTorrent at the same time, while the data downloaded from HTTP(S)/FTP
       is uploaded to the BitTorrent swarm. Using Metalink's chunk checksums,
       aria2 automatically validates chunks of data while downloading a file
       like BitTorrent.

OPTIONS
   Basic Options
       -d, --dir=DIR
           The directory to store the downloaded file.

       -i, --input-file=FILE
           Downloads URIs found in FILE. You can specify multiple URIs for a
           single entity: separate URIs on a single line using the TAB
           character. Reads input from stdin when - is specified. The
           additional out and dir options can be specified after each line of
           URIs. This optional line must start with white space(s). See Input
           File subsection for details.

       -l, --log=LOG
           The file name of the log file. If - is specified, log is written to
           stdout.

       -j, --max-concurrent-downloads=N
           Set maximum number of parallel downloads for every static
           (HTTP/FTP) URI, torrent and metalink. See also -s and -C option.
           Default: 5

       -V, --check-integrity[=true|false]
           Check file integrity by validating piece hashes. This option has
           effect only in BitTorrent and Metalink downloads with chunk
           checksums. Use this option to re-download a damaged portion of a
           file. Default: false

       -c, --continue
           Continue downloading a partially downloaded file. Use this option
           to resume a download started by a web browser or another program
           which downloads files sequentially from the beginning. Currently
           this option is only applicable to HTTP(S)/FTP downloads.

       -h, --help[=TAG|KEYWORD]
           The help messages are classified with tags. A tag starts with "#".
           For example, type "--help=#http" to get the usage for the options
           tagged with "#http". If non-tag word is given, print the usage for
           the options whose name includes that word. Available Values:
           #basic, #advanced, #http, #https, #ftp, #metalink, #bittorrent,
           #cookie, #hook, #file, #xml-rpc, #experimental, #all Default:
           #basic

   HTTP/FTP Options
       --all-proxy=PROXY
           Use this proxy server for all protocols. To erase previously
           defined proxy, use "". You can override this setting and specify a
           proxy server for a particular protocol using --http-proxy,
           --https-proxy and --ftp-proxy options. This affects all URIs. The
           format of PROXY is [http://][USER:PASSWORD@]HOST[:PORT]

           Note
           If user and password are embedded in proxy URI and they are also
           specified by --{http,https,ftp,all}-proxy-{user,passwd} options,
           those appeared later have precedence. For example, you have
           http-proxy-user="myname", http-proxy-passwd="mypass" in aria2.conf
           and you specify --http-proxy="http://proxy" in command-line, then
           you get HTTP proxy "http://proxy" with user "myname" and password
           "mypass". Another example: if you specified in command-line
           --http-proxy="http://user:pass@proxy" --http-proxy-user="myname"
           --http-proxy-passwd="mypass", then you will get HTTP proxy
           "http://proxy" with user "myname" and password "mypass". One more
           example: if you specified in command-line
           --http-proxy-user="myname" --http-proxy-passwd="mypass"
           --http-proxy="http://user:pass@proxy", then you get HTTP proxy
           "http://proxy" with user "user" and password "pass".

       --all-proxy-passwd=PASSWD
           Set password for --all-proxy option.

       --all-proxy-user=USER
           Set user for --all-proxy option.

       --connect-timeout=SEC
           Set the connect timeout in seconds to establish connection to
           HTTP/FTP/proxy server. After the connection is established, this
           option makes no effect and --timeout option is used instead.
           Default: 60

       --dry-run[=true|false]
           If true is given, aria2 just checks whether the remote file is
           available and doesn't download data. This option has effect on
           HTTP/FTP download. BitTorrent downloads are canceled if true is
           specified. Default: false

       --lowest-speed-limit=SPEED
           Close connection if download speed is lower than or equal to this
           value(bytes per sec).  0 means aria2 does not have a lowest speed
           limit. You can append K or M(1K = 1024, 1M = 1024K). This option
           does not affect BitTorrent downloads. Default: 0

       --max-file-not-found=NUM
           If aria2 receives `file not found' status from the remote HTTP/FTP
           servers NUM times without getting a single byte, then force the
           download to fail. Specify 0 to disable this option. This options is
           effective only when using HTTP/FTP servers. Default: 0

       -m, --max-tries=N
           Set number of tries.  0 means unlimited. Default: 5

       -n, --no-netrc
           Disables netrc support. netrc support is enabled by default.

       --no-proxy=DOMAINS
           Specify comma separated hostnames, domains and network address with
           or without CIDR block where proxy should not be used.

           Note
           For network address with CIDR block, only IPv4 address works.
           Current implementation does not resolve hostname in URI to compare
           network address specified in --no-proxy. So it is only effecive if
           URI has numeric IP addresses.

       -o, --out=FILE
           The file name of the downloaded file. When -Z option is used, this
           option is ignored.

           Note
           In Metalink or BitTorrent download you cannot specify file name.
           The file name specified here is only used when the URIs fed to
           aria2 are done by command line without -i, -Z option. For example:
           aria2c -o myfile.zip "http://mirror1/file.zip"
           "http://mirror2/file.zip"

       --proxy-method=METHOD
           Set the method to use in proxy request.  METHOD is either get or
           tunnel. HTTPS downloads always use tunnel regardless of this
           option. Default: get

       -R, --remote-time[=true|false]
           Retrieve timestamp of the remote file from the remote HTTP/FTP
           server and if it is available, apply it to the local file. Default:
           false

       *--reuse-uri[=true|false]
           Reuse already used URIs if no unused URIs are left. Default: true

       --server-stat-of=FILE
           Specify the filename to which performance profile of the servers is
           saved. You can load saved data using --server-stat-if option. See
           Server Performance Profile subsection below for file format.

       --server-stat-if=FILE
           Specify the filename to load performance profile of the servers.
           The loaded data will be used in some URI selector such as feedback.
           See also --uri-selector option. See Server Performance Profile
           subsection below for file format.

       --server-stat-timeout=SEC
           Specifies timeout in seconds to invalidate performance profile of
           the servers since the last contact to them. Default: 86400
           (24hours)

       -s, --split=N
           Download a file using N connections. If more than N URIs are given,
           first N URIs are used and remaining URIs are used for backup. If
           less than N URIs are given, those URIs are used more than once so
           that N connections total are made simultaneously. Please see -j
           option too. Please note that in Metalink download, this option has
           no effect and use -C option instead. Default: 5

       -t, --timeout=SEC
           Set timeout in seconds. Default: 60

       --uri-selector=SELECTOR
           Specify URI selection algorithm. The possible values are inorder,
           feedback and adaptive. If inorder is given, URI is tried in the
           order appeared in the URI list. If feedback is given, aria2 uses
           download speed observed in the previous downloads and choose
           fastest server in the URI list. This also effectively skips dead
           mirrors. The observed download speed is a part of performance
           profile of servers mentioned in --server-stat-of and
           --server-stat-if options. If adaptive is given, selects one of the
           best mirrors for the first and reserved connections. For
           supplementary ones, it returns mirrors which has not been tested
           yet, and if each of them has already been tested, returns mirrors
           which has to be tested again. Otherwise, it doesn't select anymore
           mirrors. Like feedback, it uses a performance profile of servers.
           Default: feedback

   HTTP Specific Options
       --ca-certificate=FILE
           Use the certificate authorities in FILE to verify the peers. The
           certificate file must be in PEM format and can contain multiple CA
           certificates. Use --check-certificate option to enable
           verification.

       --certificate=FILE
           Use the client certificate in FILE. The certificate must be in PEM
           format. You may use --private-key option to specify the private
           key.

       --check-certificate[=true|false]
           Verify the peer using certificates specified in --ca-certificate
           option. Default: true

       --http-accept-gzip[=true|false]
           Send "Accept: deflate, gzip" request header and inflate response if
           remote server responds with "Content-Encoding: gzip" or
           "Content-Encoding: deflate". Default: false

           Note
           Some server responds with "Content-Encoding: gzip" for files which
           itself is gzipped file. aria2 inflates them anyway because of the
           response header.

       --http-auth-challenge[=true|false]
           Send HTTP authorization header only when it is requested by the
           server. If false is set, then authorization header is always sent
           to the server. There is an exception: if username and password are
           embedded in URI, authorization header is always sent to the server
           regardless of this option. Default: false

       --http-no-cache[=true|false]
           Send Cache-Control: no-cache and Pragma: no-cache header to avoid
           cached content. If false is given, these headers are not sent and
           you can add Cache-Control header with a directive you like using
           --header option. Default: true

       --http-user=USER
           Set HTTP user. This affects all URIs.

       --http-passwd=PASSWD
           Set HTTP password. This affects all URIs.

       --http-proxy=PROXY
           Use this proxy server for HTTP. To erase previously defined proxy,
           use "". See also --all-proxy option. This affects all URIs. The
           format of PROXY is [http://][USER:PASSWORD@]HOST[:PORT]

       --http-proxy-passwd=PASSWD
           Set password for --http-proxy option.

       --http-proxy-user=USER:

           Set user for *--http-proxy* option.

       --https-proxy=PROXY
           Use this proxy server for HTTPS. To erase previously defined proxy,
           use "". See also --all-proxy option. This affects all URIs. The
           format of PROXY is [http://][USER:PASSWORD@]HOST[:PORT]

       --https-proxy-passwd=PASSWD
           Set password for --https-proxy option.

       --https-proxy-user=USER
           Set user for --https-proxy option.

       --private-key=FILE
           Use the private key in FILE. The private key must be decrypted and
           in PEM format. The behavior when encrypted one is given is
           undefined. See also --certificate option.

       --referer=REFERER
           Set Referer. This affects all URIs.

       --enable-http-keep-alive[=true|false]
           Enable HTTP/1.1 persistent connection. Default: true

       --enable-http-pipelining[=true|false]
           Enable HTTP/1.1 pipelining. Default: false

       --header=HEADER
           Append HEADER to HTTP request header. You can use this option
           repeatedly to specify more than one header: aria2c --header="X-A:
           b78" --header="X-B: 9J1" "http://host/file"

       --load-cookies=FILE
           Load Cookies from FILE using the Firefox3 format (SQLite3) and the
           Mozilla/Firefox(1.x/2.x)/Netscape format.

           Note
           If aria2 is built without libsqlite3, then it doesn't support
           Firefox3 cookie format.

       --save-cookies=FILE
           Save Cookies to FILE in Mozilla/Firefox(1.x/2.x)/ Netscape format.
           If FILE already exists, it is overwritten. Session Cookies are also
           saved and their expiry values are treated as 0. Possible Values:
           /path/to/file

       --use-head[=true|false]
           Use HEAD method for the first request to the HTTP server. Default:
           false

       -U, --user-agent=USER_AGENT
           Set user agent for HTTP(S) downloads. Default: aria2/$VERSION,
           $VERSION is replaced by package version.

   FTP Specific Options
       --ftp-user=USER
           Set FTP user. This affects all URIs. Default: anonymous

       --ftp-passwd=PASSWD
           Set FTP password. This affects all URIs. If user name is embedded
           but password is missing in URI, aria2 tries to resolve password
           using .netrc. If password is found in .netrc, then use it as
           password. If not, use the password specified in this option.
           Default: ARIA2USER@

       -p, --ftp-pasv[=true|false]
           Use the passive mode in FTP. If false is given, the active mode
           will be used. Default: true

       --ftp-proxy=PROXY
           Use this proxy server for FTP. To erase previously defined proxy,
           use "". See also --all-proxy option. This affects all URIs. The
           format of PROXY is [http://][USER:PASSWORD@]HOST[:PORT]

       --ftp-proxy-passwd=PASSWD
           Set password for --ftp-proxy option.

       --ftp-proxy-user=USER
           Set user for --ftp-proxy option.

       --ftp-type=TYPE
           Set FTP transfer type. TYPE is either binary or ascii. Default:
           binary

       --ftp-reuse-connection[=true|false]
           Reuse connection in FTP. Default: true

   BitTorrent/Metalink Options
       --select-file=INDEX...
           Set file to download by specifying its index. You can find the file
           index using the --show-files option. Multiple indexes can be
           specified by using ",", for example: 3,6. You can also use "-" to
           specify a range: 1-5. "," and "-" can be used together: 1-5,8,9.
           When used with the -M option, index may vary depending on the query
           (see --metalink-* options).

           Note
           In multi file torrent, the adjacent files specified by this option
           may also be downloaded. This is by design, not a bug. A single
           piece may include several files or part of files, and aria2 writes
           the piece to the appropriate files.

       -S, --show-files
           Print file listing of .torrent or .metalink file and exit. In case
           of .torrent file, additional information (infohash, piece length,
           etc) is also printed.

   BitTorrent Specific Options
       --bt-enable-lpd[=true|false]
           Enable Local Peer Discovery. If a private flag is set in a torrent,
           aria2 doesn't use this feature for that download even if true is
           given. Default: false

       --bt-external-ip=IPADDRESS
           Specify the external IP address to report to a BitTorrent tracker.
           Although this function is named "external", it can accept any kind
           of IP addresses. IPADDRESS must be a numeric IP address.

       --bt-hash-check-seed[=true|false]
           If true is given, after hash check using --check-integrity option
           and file is complete, continue to seed file. If you want to check
           file and download it only when it is damaged or incomplete, set
           this option to false. This option has effect only on BitTorrent
           download. Default: true

       --bt-lpd-interface=INTERFACE
           Use given interface for Local Peer Discovery. If this option is not
           specified, the default interface is chosen. You can specify
           interface name and IP address. Possible Values: interface, IP
           addres

       --bt-max-open-files=NUM
           Specify maximum number of files to open in each BitTorrent
           download. Default: 100

       --bt-max-peers=NUM
           Specify the maximum number of peers per torrent.  0 means
           unlimited. See also --bt-request-peer-speed-limit option. Default:
           55

       --bt-metadata-only[=true|false]
           Download metadata only. The file(s) described in metadata will not
           be downloaded. This option has effect only when BitTorrent Magnet
           URI is used. See also --bt-save-metadata option. Default: false

       --bt-min-crypto-level=plain|arc4
           Set minimum level of encryption method. If several encryption
           methods are provided by a peer, aria2 chooses the lowest one which
           satisfies the given level. Default: plain

       --bt-prioritize-piece=head[=SIZE],tail[=SIZE]
           Try to download first and last pieces of each file first. This is
           useful for previewing files. The argument can contain 2 keywords:
           head and tail. To include both keywords, they must be separated by
           comma. These keywords can take one parameter, SIZE. For example, if
           head=SIZE is specified, pieces in the range of first SIZE bytes of
           each file get higher priority.  tail=SIZE means the range of last
           SIZE bytes of each file. SIZE can include K or M(1K = 1024, 1M =
           1024K). If SIZE is omitted, SIZE=1M is used.

       --bt-require-crypto=true|false
           If true is given, aria2 doesn't accept and establish connection
           with legacy BitTorrent handshake(\19BitTorrent protocol). Thus
           aria2 always uses Obfuscation handshake. Default: false

       --bt-request-peer-speed-limit=SPEED
           If the whole download speed of every torrent is lower than SPEED,
           aria2 temporarily increases the number of peers to try for more
           download speed. Configuring this option with your preferred
           download speed can increase your download speed in some cases. You
           can append K or M(1K = 1024, 1M = 1024K). Default: 50K

       --bt-save-metadata[=true|false]
           Save metadata as .torrent file. This option has effect only when
           BitTorrent Magnet URI is used. The filename is hex encoded info
           hash with suffix .torrent. The directory to be saved is the same
           directory where download file is saved. If the same file already
           exists, metadata is not saved. See also --bt-metadata-only option.
           Default: false

       --bt-seed-unverified[=true|false]
           Seed previously downloaded files without verifying piece hashes.
           Default: false

       --bt-stop-timeout=SEC
           Stop BitTorrent download if download speed is 0 in consecutive SEC
           seconds. If 0 is given, this feature is disabled. Default: 0

       --bt-tracker-connect-timeout=SEC
           Set the connect timeout in seconds to establish connection to
           tracker. After the connection is established, this option makes no
           effect and --bt-tracker-timeout option is used instead. Default: 60

       --bt-tracker-interval=SEC
           Set the interval in seconds between tracker requests. This
           completely overrides interval value and aria2 just uses this value
           and ignores the min interval and interval value in the response of
           tracker. If 0 is set, aria2 determines interval based on the
           response of tracker and the download progress. Default: 0

       --bt-tracker-timeout=SEC
           Set timeout in seconds. Default: 60

       --dht-entry-point=HOST:PORT
           Set host and port as an entry point to DHT network.

       --dht-file-path=PATH
           Change the DHT routing table file to PATH. Default:
           $HOME/.aria2/dht.dat

       --dht-listen-port=PORT...
           Set UDP listening port for DHT. Multiple ports can be specified by
           using ",", for example: 6881,6885. You can also use "-" to specify
           a range: 6881-6999. "," and "-" can be used together. Default:
           6881-6999

           Note
           Make sure that the specified ports are open for incoming UDP
           traffic.

       --dht-message-timeout=SEC
           Set timeout in seconds. Default: 10

       --enable-dht[=true|false]
           Enable DHT functionality. If a private flag is set in a torrent,
           aria2 doesn't use DHT for that download even if true is given.
           Default: true

       --enable-peer-exchange[=true|false]
           Enable Peer Exchange extension. If a private flag is set in a
           torrent, this feature is disabled for that download even if true is
           given. Default: true

       --follow-torrent=true|false|mem
           If true or mem is specified, when a file whose suffix is ".torrent"
           or content type is "application/x-bittorrent" is downloaded, aria2
           parses it as a torrent file and downloads files mentioned in it. If
           mem is specified, a torrent file is not written to the disk, but is
           just kept in memory. If false is specified, the action mentioned
           above is not taken. Default: true

       -O, --index-out=INDEX=PATH
           Set file path for file with index=INDEX. You can find the file
           index using the --show-files option. PATH is a relative path to the
           path specified in --dir option. You can use this option multiple
           times. Using this option, you can specify the output filenames of
           BitTorrent downloads.

       --listen-port=PORT...
           Set TCP port number for BitTorrent downloads. Multiple ports can be
           specified by using ",", for example: 6881,6885. You can also use
           "-" to specify a range: 6881-6999. "," and "-" can be used
           together: 6881-6889,6999. Default: 6881-6999

           Note
           Make sure that the specified ports are open for incoming TCP
           traffic.

       --max-overall-upload-limit=SPEED
           Set max overall upload speed in bytes/sec.  0 means unrestricted.
           You can append K or M(1K = 1024, 1M = 1024K). To limit the upload
           speed per torrent, use --max-upload-limit option. Default: 0

       -u, --max-upload-limit=SPEED
           Set max upload speed per each torrent in bytes/sec.  0 means
           unrestricted. You can append K or M(1K = 1024, 1M = 1024K). To
           limit the overall upload speed, use --max-overall-upload-limit
           option. Default: 0

       --peer-id-prefix=PEER_ID_PREFIX
           Specify the prefix of peer ID. The peer ID in BitTorrent is 20 byte
           length. If more than 20 bytes are specified, only first 20 bytes
           are used. If less than 20 bytes are specified, random byte data are
           added to make its length 20 bytes. Default: aria2/$VERSION-,
           $VERSION is replaced by package version.

       --seed-ratio=RATIO
           Specify share ratio. Seed completed torrents until share ratio
           reaches RATIO. You are strongly encouraged to specify equals or
           more than 1.0 here. Specify 0.0 if you intend to do seeding
           regardless of share ratio. If --seed-time option is specified along
           with this option, seeding ends when at least one of the conditions
           is satisfied. Default: 1.0

       --seed-time=MINUTES
           Specify seeding time in minutes. Also see the --seed-ratio option.

           Note
           Specifying --seed-time=0 disables seeding after download completed.

       -T, --torrent-file=TORRENT_FILE
           The path to the .torrent file. You are not required to use this
           option because you can specify .torrent files without -T.

   Metalink Specific Options
       --follow-metalink=true|false|mem
           If true or mem is specified, when a file whose suffix is
           ".metalink" or content type of "application/metalink+xml" is
           downloaded, aria2 parses it as a metalink file and downloads files
           mentioned in it. If mem is specified, a metalink file is not
           written to the disk, but is just kept in memory. If false is
           specified, the action mentioned above is not taken. Default: true

       -M, --metalink-file=METALINK_FILE
           The file path to .metalink file. Reads input from stdin when - is
           specified. You are not required to use this option because you can
           specify .metalink files without -M.

       -C, --metalink-servers=NUM_SERVERS
           The number of servers to connect to simultaneously. Some Metalinks
           regulate the number of servers to connect. aria2 strictly respects
           them. This means that if Metalink defines the maxconnections
           attribute lower than NUM_SERVERS, then aria2 uses the value of
           maxconnections attribute instead of NUM_SERVERS. See also -s and -j
           options. Default: 5

       --metalink-language=LANGUAGE
           The language of the file to download.

       --metalink-location=LOCATION[,...]
           The location of the preferred server. A comma-delimited list of
           locations is acceptable, for example, jp,us.

       --metalink-os=OS
           The operating system of the file to download.

       --metalink-version=VERSION
           The version of the file to download.

       --metalink-preferred-protocol=PROTO
           Specify preferred protocol. The possible values are http, https,
           ftp and none. Specify none to disable this feature. Default: none

       --metalink-enable-unique-protocol=true|false
           If true is given and several protocols are available for a mirror
           in a metalink file, aria2 uses one of them. Use
           --metalink-preferred-protocol option to specify the preference of
           protocol. Default: true

   XML-RPC Options
       --enable-xml-rpc[=true|false]
           Enable XML-RPC server. It is strongly recommended to set username
           and password using --xml-rpc-user and --xml-rpc-passwd option. See
           also --xml-rpc-listen-port option. Default: false

       --xml-rpc-listen-all[=true|false]
           Listen incoming XML-RPC requests on all network interfaces. If
           false is given, listen only on local loopback interface. Default:
           false

       --xml-rpc-listen-port=PORT
           Specify a port number for XML-RPC server to listen to. Possible
           Values: 1024-65535 Default: 6800

       --xml-rpc-max-request-size=SIZE
           Set max size of XML-RPC request. If aria2 detects the request is
           more than SIZE bytes, it drops connection. Default: 2M

       --xml-rpc-passwd=PASSWD
           Set XML-RPC password.

       --xml-rpc-user=USER
           Set XML-RPC user.

   Advanced Options
       --allow-overwrite=true|false
           Restart download from scratch if the corresponding control file
           doesn't exist. See also --auto-file-renaming option. Default: false

       --allow-piece-length-change=true|false
           If false is given, aria2 aborts download when a piece length is
           different from one in a control file. If true is given, you can
           proceed but some download progress will be lost. Default: false

       --always-resume[=true|false]
           Always resume download. If true is given, aria2 always tries to
           resume download and if resume is not possible, aborts download. If
           false is given, when all given URIs do not support resume or aria2
           encounters N URIs which does not support resume (N is the value
           specified using --max-resume-failure-tries option), aria2 downloads
           file from scratch. See --max-resume-failure-tries option. Default:
           true

       --async-dns[=true|false]
           Enable asynchronous DNS. Default: true

       --auto-file-renaming[=true|false]
           Rename file name if the same file already exists. This option works
           only in HTTP(S)/FTP download. The new file name has a dot and a
           number(1..9999) appended. Default: true

       --auto-save-interval=SEC
           Save a control file(*.aria2) every SEC seconds. If 0 is given, a
           control file is not saved during download. aria2 saves a control
           file when it stops regardless of the value. The possible values are
           between 0 to 600. Default: 60

       --conf-path=PATH
           Change the configuration file path to PATH. Default:
           $HOME/.aria2/aria2.conf

       -D, --daemon
           Run as daemon. The current working directory will be changed to /
           and standard input, standard output and standard error will be
           redirected to /dev/null. Default: false

       --disable-ipv6[=true|false]
           Disable IPv6. This is useful if you have to use broken DNS and want
           to avoid terribly slow AAAA record lookup. Default: false

       --enable-direct-io[=true|false]
           Enable directI/O, which lowers cpu usage while allocating/checking
           files. Turn off if you encounter any error. Default: true

       --event-poll=POLL
           Specify the method for polling events. The possible Values are
           epoll and select. If you use recent Linux that has epoll, then the
           default value is epoll. Otherwise, the default value is select.

       --file-allocation=METHOD
           Specify file allocation method.  none doesn't pre-allocate file
           space.  prealloc pre-allocates file space before download begins.
           This may take some time depending on the size of the file. If you
           are using newer file systems such as ext4 (with extents support),
           btrfs or xfs, falloc is your best choice. It allocates large(few
           GiB) files almost instantly. Don't use falloc with legacy file
           systems such as ext3 because it takes almost same time as prealloc
           and it blocks aria2 entirely until allocation finishes.  falloc may
           not be available if your system doesn't have posix_fallocate()
           function. Possible Values: none, prealloc, falloc Default: prealloc

       --human-readable[=true|false]
           Print sizes and speed in human readable format (e.g., 1.2Ki, 3.4Mi)
           in the console readout. Default: true

       --interface=INTERFACE
           Bind sockets to given interface. You can specify interface name, IP
           address and hostname. Possible Values: interface, IP address,
           hostname

           Note
           If an interface has multiple addresses, it is highly recommended to
           specify IP address explicitly. See also --disable-ipv6. If your
           system doesn't have getifaddrs(), this option doesn't accept
           interface name.

       --max-resume-failure-tries=N
           When used with --always-resume=false, aria2 downloads file from
           scratch when aria2 detects N number of URIs that does not support
           resume. If N is 0, aria2 downloads file from scratch when all given
           URIs do not support resume. See --always-resume option. Default: 0

       --log-level=LEVEL
           Set log level to output. LEVEL is either debug, info, notice, warn
           or error. Default: debug

       --on-download-complete=COMMAND
           Set the command to be executed when download completes. See
           --on-download-start option for the requirement of COMMAND. See also
           --on-download-stop option. Possible Values: /path/to/command

       --on-download-error=COMMAND
           Set the command to be executed when download aborts due to error.
           See --on-download-start option for the requirement of COMMAND. See
           also --on-download-stop option. Possible Values: /path/to/command

       --on-download-pause=COMMAND
           Set the command to be executed when download is paused. See
           --on-download-start option for the requirement of COMMAND. Possible
           Values: /path/to/command

       --on-download-start=COMMAND
           Set the command to be executed when download starts up. COMMAND
           must take just one argument and GID is passed to COMMAND as a first
           argument. Possible Values: /path/to/command

       --on-download-stop=COMMAND
           Set the command to be executed when download stops. You can
           override the command to be executed for particular download result
           using --on-download-complete and --on-download-error. If they are
           specified, command specified in this option is not executed. See
           --on-download-start option for the requirement of COMMAND. Possible
           Values: /path/to/command

       --summary-interval=SEC
           Set interval in seconds to output download progress summary.
           Setting 0 suppresses the output. Default: 60

           Note
           In multi file torrent downloads, the files adjacent forward to the
           specified files are also allocated if they share the same piece.

       -Z, --force-sequential[=true|false]
           Fetch URIs in the command-line sequentially and download each URI
           in a separate session, like the usual command-line download
           utilities. Default: false

       --max-overall-download-limit=SPEED
           Set max overall download speed in bytes/sec.  0 means unrestricted.
           You can append K or M(1K = 1024, 1M = 1024K). To limit the download
           speed per download, use --max-download-limit option. Default: 0

       --max-download-limit=SPEED
           Set max download speed per each download in bytes/sec.  0 means
           unrestricted. You can append K or M(1K = 1024, 1M = 1024K). To
           limit the overall download speed, use --max-overall-download-limit
           option. Default: 0

       --no-conf
           Disable loading aria2.conf file.

       --no-file-allocation-limit=SIZE
           No file allocation is made for files whose size is smaller than
           SIZE. You can append K or M(1K = 1024, 1M = 1024K). Default: 5M

       -P, --parameterized-uri[=true|false]
           Enable parameterized URI support. You can specify set of parts:
           http://{sv1,sv2,sv3}/foo.iso. Also you can specify numeric
           sequences with step counter: http://host/image[000-100:2].img. A
           step counter can be omitted. If all URIs do not point to the same
           file, such as the second example above, -Z option is required.
           Default: false

       -q, --quiet[=true|false]
           Make aria2 quiet (no console output). Default: false

       --realtime-chunk-checksum=true|false
           Validate chunk of data by calculating checksum while downloading a
           file if chunk checksums are provided. Default: true

       --remove-control-file[=true|false]
           Remove control file before download. Using with
           --allow-overwrite=true, download always starts from scratch. This
           will be useful for users behind proxy server which disables resume.

           Note
           For Metalink downloads, -C1 is recommended for proxy server which
           disables resume, in order to avoid establishing unnecessary
           connections.

       --save-session=FILE
           Save error/unfinished downloads to FILE on exit. You can pass this
           output file to aria2c with -i option on restart. Please note that
           downloads added by aria2.addTorrent and aria2.addMetalink XML-RPC
           method are not saved.

       --stop=SEC
           Stop application after SEC seconds has passed. If 0 is given, this
           feature is disabled. Default: 0

       -v, --version
           Print the version number, copyright and the configuration
           information and exit.

   Options That Take An Optional Argument
       The options that have its argument surrounded by square brackets([])
       take an optional argument. Usually omiting the argument is evaluated to
       true. If you use short form of these options(such as -V) and give an
       argument, then the option name and its argument should be
       concatenated(e.g. -Vfalse). If any spaces are inserted between the
       option name and the argument, the argument will be treated as URI and
       usually this is not what you expect.

   URI, MAGNET, TORRENT_FILE, METALINK_FILE
       You can specify multiple URIs in command-line. Unless you specify -Z
       option, all URIs must point to the same file or downloading will fail.

       You can specify arbitrary number of BitTorrent Magnet URI. Please note
       that they are always treated as a separate download. Both hex encoded
       40 characters Info Hash and Base32 encoded 32 characters Info Hash are
       supported. The multiple "tr" parameters are supported. Because
       BitTorrent Magnet URI is likely to contain "&" character, it is highly
       recommended to always quote URI with single(') or double(") quotation.
       It is strongly recommended to enable DHT especially when "tr" parameter
       is missing. See http://www.bittorrent.org/beps/bep_0009.html for more
       details about BitTorrent Magnet URI.

       You can also specify arbitrary number of torrent files and Metalink
       documents stored on a local drive. Please note that they are always
       treated as a separate download. Both Metalink4 and Metalink version 3.0
       are supported.

       You can specify both torrent file with -T option and URIs. By doing
       this, you can download a file from both torrent swarm and HTTP(S)/FTP
       server at the same time, while the data from HTTP(S)/FTP are uploaded
       to the torrent swarm. For single file torrents, URI can be a complete
       URI pointing to the resource or if URI ends with /, name in torrent
       file in torrent is added. For multi-file torrents, name and path are
       added to form a URI for each file.

           Note
           Make sure that URI is quoted with single(') or double(") quotation
           if it contains "&" or any characters that have special meaning in
           shell.

   Resuming Download
       Usually, you can resume transfer by just issuing same command(aria2c
       URI) if the previous transfer is made by aria2.

       If the previous transfer is made by a browser or wget like sequential
       download manager, then use -c option to continue the transfer(aria2c -c
       URI).

EXIT STATUS
       Because aria2 can handle multiple downloads at once, it encounters lots
       of errors in a session. aria2 returns the following exit status based
       on the last error encountered.

       0
           If all downloads are successful.

       1
           If an unknown error occurs.

       2
           If time out occurs.

       3
           If a resource is not found.

       4
           If aria2 sees the specfied number of "resource not found" error.
           See --max-file-not-found option).

       5
           If a download aborts because download speed is too slow. See
           --lowest-speed-limit option)

       6
           If network problem occurs.

       7
           If there are unfinished downloads. This error is only reported if
           all finished downloads are successful and there are unfinished
           downloads in a queue when aria2 exits by pressing Ctrl-C by an user
           or sending TERM or INT signal.

       8
           If server does not support resume when resume is required to
           complete download.

           Note
           An error occurred in a finished download will not be reported as
           exit status.

ENVIRONMENT
       aria2 recognizes the following environment variables.

       http_proxy [http://][USER:PASSWORD@]HOST[:PORT]
           Specify proxy server for use in HTTP. Overrides http-proxy value in
           configuration file. The command-line option --http-proxy overrides
           this value.

       https_proxy [http://][USER:PASSWORD@]HOST[:PORT]
           Specify proxy server for use in HTTPS. Overrides https-proxy value
           in configuration file. The command-line option --https-proxy
           overrides this value.

       ftp_proxy [http://][USER:PASSWORD@]HOST[:PORT]
           Specify proxy server for use in FTP. Overrides ftp-proxy value in
           configuration file. The command-line option --ftp-proxy overrides
           this value.

       all_proxy [http://][USER:PASSWORD@]HOST[:PORT]
           Specify proxy server for use if no protocol-specific proxy is
           specified. Overrides all-proxy value in configuration file. The
           command-line option --all-proxy overrides this value.

       no_proxy [DOMAIN,...]
           Specify comma-separated hostname, domains and network address with
           or without CIDR block to which proxy should not be used. Overrides
           no-proxy value in configuration file. The command-line option
           --no-proxy overrides this value.

FILES
   aria2.conf
       By default, aria2 parses $HOME/.aria2/aria2.conf as a configuraiton
       file. You can specify the path to configuration file using --conf-path
       option. If you don't want to use the configuraitonf file, use --no-conf
       option.

       The configuration file is a text file and has 1 option per each line.
       In each line, you can specify name-value pair in the format:
       NAME=VALUE, where name is the long command-line option name without
       "--" prefix. You can use same syntax for the command-line option. The
       lines beginning "#" are treated as comments.

           # sample configuration file for aria2c
           listen-port=60000
           dht-listen-port=60000
           seed-ratio=1.0
           max-upload-limit=50K
           ftp-pasv=true

   dht.dat
       By default, the routing table of DHT is saved to the path
       $HOME/.aria2/dht.dat.

   Control File
       aria2 uses a control file to track the progress of a download. A
       control file is placed in the same directory as the downloading file
       and its filename is the filename of downloading file with ".aria2"
       appended. For example, if you are downloading file.zip, then the
       control file should be file.zip.aria2. (There is a exception for this
       naming convention. If you are downloading a multi torrent, its control
       file is the "top directory" name of the torrent with ".aria2" appended.
       The "top directory" name is a value of "name" key in "info" directory
       in a torrent file.)

       Usually a control file is deleted once download completed. If aria2
       decides that download cannot be resumed(for example, when downloading a
       file from a HTTP server which doesn't support resume), a control file
       is not created.

       Normally if you lose a control file, you cannot resume download. But if
       you have a torrent or metalink with chunk checksums for the file, you
       can resume the download without a control file by giving -V option to
       aria2c in command-line.

   Input File
       The input file can contain a list of URIs for aria2 to download. You
       can specify multiple URIs for a single entity: separate URIs on a
       single line using the TAB character.

       Each line is treated as if it is provided in command-line argument.
       Therefore they are affected by -Z and -P options.

       Lines starting with "#" are treated as comments and skipped.

       Additionally, the following options can be specified after each line of
       URIs. These optional lines must start with white space(s).

       o   dir

       o   check-integrity

       o   continue

       o   all-proxy

       o   all-proxy-user

       o   all-proxy-passwd

       o   connect-timeout

       o   dry-run

       o   lowest-speed-limit

       o   max-file-not-found

       o   max-tries

       o   no-proxy

       o   out

       o   proxy-method

       o   remote-time

       o   split

       o   timeout

       o   http-auth-challenge

       o   http-no-cache

       o   http-user

       o   http-passwd

       o   http-proxy

       o   http-proxy-user

       o   http-proxy-passwd

       o   https-proxy

       o   https-proxy-user

       o   https-proxy-passwd

       o   referer

       o   enable-http-keep-alive

       o   enable-http-pipelining

       o   header

       o   use-head

       o   user-agent

       o   ftp-user

       o   ftp-passwd

       o   ftp-pasv

       o   ftp-proxy

       o   ftp-proxy-user

       o   ftp-proxy-passwd

       o   ftp-type

       o   ftp-reuse-connection

       o   no-netrc

       o   reuse-uri

       o   select-file

       o   bt-enable-lpd

       o   bt-external-ip

       o   bt-hash-check-seed

       o   bt-max-open-files

       o   bt-max-peers

       o   bt-metadata-only

       o   bt-min-crypto-level

       o   bt-prioritize-piece

       o   bt-require-crypto

       o   bt-request-peer-speed-limit

       o   bt-save-metadata

       o   bt-seed-unverified

       o   bt-stop-timeout

       o   bt-tracker-interval

       o   bt-tracker-timeout

       o   bt-tracker-connect-timeout

       o   enable-peer-exchange

       o   follow-torrent

       o   index-out

       o   max-upload-limit

       o   seed-ratio

       o   seed-time

       o   follow-metalink

       o   metalink-servers

       o   metalink-language

       o   metalink-location

       o   metalink-os

       o   metalink-version

       o   metalink-preferred-protocol

       o   metalink-enable-unique-protocol

       o   allow-overwrite

       o   allow-piece-length-change

       o   async-dns

       o   auto-file-renaming

       o   file-allocation

       o   max-download-limit

       o   no-file-allocation-limit

       o   parameterized-uri

       o   realtime-chunk-checksum

       o   remove-control-file

       o   always-resume

       o   max-resume-failure-tries

       o   http-accept-gzip

       These options have exactly same meaning of the ones in the command-line
       options, but it just applies to the URIs it belongs to.

       For example, the content of uri.txt is

           http://server/file.iso http://mirror/file.iso
             dir=/iso_images
             out=file.img
           http://foo/bar

       If aria2 is executed with -i uri.txt -d /tmp options, then file.iso is
       saved as /iso_images/file.img and it is downloaded from
       http://server/file.iso and http://mirror/file.iso. The file bar is
       downloaded from http://foo/bar and saved as /tmp/bar.

       In some cases, out parameter has no effect. See note of --out option
       for the restrictions.

   Server Performance Profile
       This section describes the format of server performance profile. The
       file is plain text and each line has several NAME=VALUE pair, delimited
       by comma. Currently following NAMEs are recognized:

       host
           Hostname of the server. Required.

       protocol
           Protocol for this profile, such as ftp, http. Required.

       dl_speed
           The average download speed observed in the previous download in
           bytes per sec. Required.

       sc_avg_speed
           The average download speed observed in the previous download in
           bytes per sec. This value is only updated if the download is done
           in single connection environment and only used by
           AdaptiveURISelector. Optional.

       mc_avg_speed
           The average download speed observed in the previous download in
           bytes per sec. This value is only updated if the download is done
           in multi connection environment and only used by
           AdaptiveURISelector. Optional.

       counter
           How many times the server is used. Currently this value is only
           used by AdaptiveURISelector. Optional.

       last_updated
           Last contact time in GMT with this server, specified in the seconds
           since the Epoch(00:00:00 on January 1, 1970, UTC). Required.

       status
           ERROR is set when server cannot be reached or out-of-service or
           timeout occurred. Otherwise, OK is set.

       Those fields must exist in one line. The order of the fields is not
       significant. You can put pairs other than the above; they are simply
       ignored.

       An example follows:

           host=localhost, protocol=http, dl_speed=32000, last_updated=1222491640, status=OK
           host=localhost, protocol=ftp, dl_speed=0, last_updated=1222491632, status=ERROR

XML-RPC INTERFACE
   Terminology
       GID
           GID(or gid) is the key to manage each download. Each download has
           an unique GID. Currently GID looks like an integer, but don't treat
           it as integer because it may be changed to another type in the
           future release. Please note that GID is session local and not
           persisted when aria2 exits.

   Methods
       aria2.addUri uris[, options[, position]]

       This method adds new HTTP(S)/FTP/BitTorrent Magnet URI. uris is of type
       array and its element is URI which is of type string. For BitTorrent
       Magnet URI, uris must have only one element and it should be BitTorrent
       Magnet URI. options is of type struct and its members are a pair of
       option name and value. See Options below for more details. If position
       is given as an integer starting from 0, the new download is inserted at
       position in the waiting queue. If position is not given or position is
       larger than the size of the queue, it is appended at the end of the
       queue. This method returns GID of registered download.

       aria2.addTorrent torrent[, uris[, options[, position]]]

       This method adds BitTorrent download by uploading .torrent file. If you
       want to add BitTorrent Magnet URI, use aria2.addUri method instead.
       torrent is of type base64 which contains Base64-encoded .torrent file.
       uris is of type array and its element is URI which is of type string.
       uris is used for Web-seeding. For single file torrents, URI can be a
       complete URI pointing to the resource or if URI ends with /, name in
       torrent file is added. For multi-file torrents, name and path in
       torrent are added to form a URI for each file. options is of type
       struct and its members are a pair of option name and value. See Options
       below for more details. If position is given as an integer starting
       from 0, the new download is inserted at position in the waiting queue.
       If position is not given or position is larger than the size of the
       queue, it is appended at the end of the queue. This method returns GID
       of registered download. Please note that the downloads added by this
       method are not saved by --save-session.

       aria2.addMetalink metalink[, options[, position]]

       This method adds Metalink download by uploading .metalink file.
       metalink is of type base64 which contains Base64-encoded .metalink
       file. options is of type struct and its members are a pair of option
       name and value. See Options below for more details. If position is
       given as an integer starting from 0, the new download is inserted at
       position in the waiting queue. If position is not given or position is
       larger than the size of the queue, it is appended at the end of the
       queue. This method returns array of GID of registered download. Please
       note that the downloads added by this method are not saved by
       --save-session.

       aria2.remove gid

       This method removes the download denoted by gid. gid is of type string.
       If specified download is in progress, it is stopped at first. The
       status of removed download becomes "removed". This method returns GID
       of removed download.

       aria2.forceRemove gid

       This method removes the download denoted by gid. This method behaves
       just like aria2.remove except that this method removes download without
       any action which takes time such as contacting BitTorrent tracker.

       aria2.pause gid

       This method pauses the download denoted by gid. gid is of type string.
       The status of paused download becomes "paused". If the download is
       active, the download is placed on the first position of waiting queue.
       As long as the status is "paused", the download is not started. To
       change status to "waiting", use aria2.unpause method. This method
       returns GID of paused download.

       aria2.pauseAll

       This method is equal to calling aria2.pause for every active/waiting
       download. This methods returns "OK" for success.

       aria2.forcePause pid

       This method pauses the download denoted by gid. This method behaves
       just like aria2.pause except that this method pauses download without
       any action which takes time such as contacting BitTorrent tracker.

       aria2.forcePauseAll

       This method is equal to calling aria2.forcePause for every
       active/waiting download. This methods returns "OK" for success.

       aria2.unpause gid

       This method changes the status of the download denoted by gid from
       "paused" to "waiting". This makes the download eligible to restart. gid
       is of type string. This method returns GID of unpaused download.

       aria2.unpauseAll

       This method is equal to calling aria2.unpause for every active/waiting
       download. This methods returns "OK" for success.

       aria2.tellStatus gid

       This method returns download progress of the download denoted by gid.
       gid is of type string. The response is of type struct and it contains
       following keys. The value type is string.

       gid
           GID of this download.

       status
           "active" for currently downloading/seeding entry. "waiting" for the
           entry in the queue; download is not started. "paused" for the
           paused entry. "error" for the stopped download because of error.
           "complete" for the stopped and completed download. "removed" for
           the download removed by user.

       totalLength
           Total length of this download in bytes.

       completedLength
           Completed length of this download in bytes.

       uploadLength
           Uploaded length of this download in bytes.

       bitfield
           Hexadecimal representation of the download progress. The highest
           bit corresponds to piece index 0. The set bits indicate the piece
           is available and unset bits indicate the piece is missing. The
           spare bits at the end are set to zero.

       downloadSpeed
           Download speed of this download measured in bytes/sec.

       uploadSpeed
           Upload speed of this download measured in bytes/sec.

       infoHash
           InfoHash. BitTorrent only.

       numSeeders
           The number of seeders the client has connected to. BitTorrent only.

       pieceLength
           Piece length in bytes.

       numPieces
           The number of pieces.

       connections
           The number of peers/servers the client has connected to.

       errorCode
           The last error code occurred in this download. The value is of type
           string. The error codes are defined in EXIT STATUS section. This
           value is only available for stopped/completed downloads.

       followedBy
           List of GIDs which are generated by the consequence of this
           download. For example, when aria2 downloaded Metalink file, it
           generates downloads described in it(see --follow-metalink option).
           This value is useful to track these auto generated downloads. If
           there is no such downloads, this key will not be included in the
           response.

       belongsTo
           GID of a parent download. Some downloads are a part of another
           download. For example, if a file in Metalink has BitTorrent
           resource, the download of .torrent is a part of that file. If this
           download has no parent, this key will not be included in the
           response.

       dir
           Directory to save files. This key is not available for stopped
           downloads.

       files
           Returns the list of files. The element of list is the same struct
           used in aria2.getFiles method.

       bittorrent
           Struct which contains information retrieved from .torrent file.
           BitTorrent only. It contains following keys.

           announceList
               List of lists of announce URI. If .torrent file contains
               announce and no announce-list, announce is converted to
               announce-list format.

           comment
               The comment for the torrent. comment.utf-8 is used if
               available.

           creationDate
               The creation time of the torrent. The value is an integer since
               the Epoch, measured in seconds.

           mode
               File mode of the torrent. The value is either single or multi.

           info
               Struct which contains data from Info dictionary. It contains
               following keys.

               name
                   name in info dictionary. name.utf-8 is used if available.

       aria2.getUris gid

       This method returns URIs used in the download denoted by gid. gid is of
       type string. The response is of type array and its element is of type
       struct and it contains following keys. The value type is string.

       uri
           URI

       status

           used if the URI is already used.  waiting if the URI is waiting in
           the queue.

       aria2.getFiles gid

       This method returns file list of the download denoted by gid. gid is of
       type string. The response is of type array and its element is of type
       struct and it contains following keys. The value type is string.

       index
           Index of file. Starting with 1. This is the same order with the
           files in multi-file torrent.

       path
           File path.

       length
           File size in bytes.

       selected
           "true" if this file is selected by --select-file option. If
           --select-file is not specified or this is single torrent or no
           torrent download, this value is always "true". Otherwise "false".

       uris
           Returns the list of URI for this file. The element of list is the
           same struct used in aria2.getUris method.

       aria2.getPeers gid

       This method returns peer list of the download denoted by gid. gid is of
       type string. This method is for BitTorrent only. The response is of
       type array and its element is of type struct and it contains following
       keys. The value type is string.

       peerId
           Percent-encoded peer ID.

       ip
           IP address of the peer.

       port
           Port number of the peer.

       bitfield
           Hexadecimal representation of the download progress of the peer.
           The highest bit corresponds to piece index 0. The set bits indicate
           the piece is available and unset bits indicate the piece is
           missing. The spare bits at the end are set to zero.

       amChoking
           "true" if this client is choking the peer. Otherwise "false".

       peerChoking
           "true" if the peer is choking this client. Otherwise "false".

       downloadSpeed
           Download speed (byte/sec) that this client obtains from the peer.

       uploadSpeed
           Upload speed(byte/sec) that this client uploads to the peer.

       seeder
           "true" is this client is a seeder. Otherwise "false".

       aria2.getServers gid

       This method returns currently connected HTTP(S)/FTP servers of the
       download denoted by gid. gid is of type string. The response is of type
       array and its element is of type struct and it contains following keys.
       The value type is string.

       index
           Index of file. Starting with 1. This is the same order with the
           files in multi-file torrent.

       servers
           The list of struct which contains following keys.

           uri
               URI originally added.

           currentUri
               This is the URI currently used for downloading. If redirection
               is involved, currentUri and uri may differ.

           downloadSpeed
               Download speed (byte/sec)

       aria2.tellActive

       This method returns the list of active downloads. The response is of
       type array and its element is the same struct returned by
       aria2.tellStatus method.

       aria2.tellWaiting offset, num

       This method returns the list of waiting download, including paused
       downloads. offset is of type integer and specifies the offset from the
       download waiting at the front. num is of type integer and specifies the
       number of downloads to be returned.

       If offset is a positive integer, this method returns downloads in the
       range of [offset, offset+num).

       offset can be a negative integer. offset == -1 points last download in
       the waiting queue and offset == -2 points the download before the last
       download, and so on. The downloads in the response are in reversed
       order.

       For example, imagine that three downloads "A","B" and "C" are waiting
       in this order. aria2.tellWaiting(0, 1) returns ["A"].
       aria2.tellWaiting(1, 2) returns ["B", "C"]. aria2.tellWaiting(-1, 2)
       returns ["C", "B"].

       The response is of type array and its element is the same struct
       returned by aria2.tellStatus method.

       aria2.tellStopped offset, num

       This method returns the list of stopped download. offset is of type
       integer and specifies the offset from the oldest download. num is of
       type integer and specifies the number of downloads to be returned.

       offset and num have the same semantics as aria2.tellWaiting method.

       The response is of type array and its element is the same struct
       returned by aria2.tellStatus method.

       aria2.changePosition gid, pos, how

       This method changes the position of the download denoted by gid. pos is
       of type integer. how is of type string. If how is "POS_SET", it moves
       the download to a position relative to the beginning of the queue. If
       how is "POS_CUR", it moves the download to a position relative to the
       current position. If how is "POS_END", it moves the download to a
       position relative to the end of the queue. If the destination position
       is less than 0 or beyond the end of the queue, it moves the download to
       the beginning or the end of the queue respectively. The response is of
       type integer and it is the destination position.

       For example, if GID#1 is placed in position 3, aria2.changePosition(1,
       -1, POS_CUR) will change its position to 2. Additional
       aria2.changePosition(1, 0, POS_SET) will change its position to 0(the
       beginning of the queue).

       aria2.changeUri gid, fileIndex, delUris, addUris[, position]

       This method removes URIs in delUris from and appends URIs in addUris to
       download denoted by gid. delUris and addUris are list of string. A
       download can contain multiple files and URIs are attached to each file.
       fileIndex is used to select which file to remove/attach given URIs.
       fileIndex is 1-based. position is used to specify where URIs are
       inserted in the existing waiting URI list. position is 0-based. When
       position is omitted, URIs are appended to the back of the list. This
       method first execute removal and then addition. position is the
       position after URIs are removed, not the position when this method is
       called. When removing URI, if same URIs exist in download, only one of
       them is removed for each URI in delUris. In other words, there are
       three URIs "http://example.org/aria2" and you want remove them all, you
       have to specify (at least) 3 "http://example.org/aria2" in delUris.
       This method returns a list which contains 2 integers. The first integer
       is the number of URIs deleted. The second integer is the number of URIs
       added.

       aria2.getOption gid

       This method returns options of the download denoted by gid. The
       response is of type struct. Its key is the name of option. The value
       type is string.

       aria2.changeOption gid, options

       This method changes options of the download denoted by gid dynamically.
       gid is of type string. options is of type struct and the available
       options are: bt-max-peers, bt-request-peer-speed-limit,
       max-download-limit and max-upload-limit. This method returns "OK" for
       success.

       aria2.getGlobalOption

       This method returns global options. The response is of type struct. Its
       key is the name of option. The value type is string. Because global
       options are used as a template for the options of newly added download,
       the response contains keys returned by aria2.getOption method.

       aria2.changeGlobalOption options

       This method changes global options dynamically. options is of type
       struct and the available options are max-concurrent-downloads,
       max-overall-download-limit and max-overall-upload-limit. This method
       returns "OK" for success.

       aria2.purgeDownloadResult

       This method purges completed/error/removed downloads to free memory.
       This method returns "OK".

       aria2.getVersion

       This method returns version of the program and the list of enabled
       features. The response is of type struct and contains following keys.

       version
           Version number of the program in string.

       enabledFeatures
           List of enabled features. Each feature name is of type string.

       aria2.getSessionInfo

       This method returns session information. The response is of type struct
       and contains following key.

       sessionId
           Session ID, which is generated each time when aria2 is invoked.

       aria2.shutdown

       This method shutdowns aria2. This method returns "OK".

       aria2.forceShutdown

       This method shutdowns aria2. This method behaves like aria2.shutdown
       except that any actions which takes time such as contacting BitTorrent
       tracker are skipped. This method returns "OK".

       system.multicall methods

       This methods encapsulates multiple method calls in a single request.
       methods is of type array and its element is struct. The struct contains
       two keys: "methodName" and "params". "methodName" is the method name to
       call and "params" is array containing parameters to the method. This
       method returns array of responses. The element of array will either be
       a one-item array containing the return value of each method call or
       struct of fault element if an encapsulated method call fails.

   Error Handling
       In case of error, aria2 returns faultCode=1 and the error message in
       faultString.

   Options
       Same options for -i list are available. See Input File subsection for
       complete list of options.

       In the option struct, name element is option name(without preceding
       "--") and value element is argument as string.

           <struct>
             <member>
               <name>split</name>
               <value><string>1</string></value>
             </member>
             <member>
               <name>http-proxy</name>
               <value><string>http://proxy/</string></value>
             </member>
           </struct>

       header and index-out option are allowed multiple times in command-line.
       Since name should be unique in struct(many XML-RPC library
       implementation uses hash or dict for struct), single string is not
       enough. To overcome this situation, they can take array as value as
       well as string.

           <struct>
             <member>
               <name>header</name>
               <value>
                 <array>
                   <data>
                     <value><string>Accept-Language: ja</string></value>
                     <value><string>Accept-Charset: utf-8</string></value>
                   </data>
                 </array>
               </value>
             </member>
           </struct>

   Sample XML-RPC Client Code
       The following Ruby script adds http://localhost/aria2.tar.bz2 to aria2c
       operated on localhost with option --dir=/downloads and prints its
       reponse.

           #!/usr/bin/env ruby

           require 'xmlrpc/client'
           require 'pp'

           client=XMLRPC::Client.new2("http://localhost:6800/rpc")

           options={ "dir" => "/downloads" }
           result=client.call("aria2.addUri", [ "http://localhost/aria2.tar.bz2" ], options)

           pp result

       If you are a Python lover, you can use xmlrpclib(for Python3.x, use
       xmlrpc.client instead) to interact with aria2.

           import xmlrpclib
           from pprint import pprint

           s = xmlrpclib.ServerProxy("http://localhost:6800/rpc")
           r = s.aria2.addUri(["http://localhost/aria2.tar.bz2"], {"dir":"/downloads"})
           pprint(r)

EXAMPLE
   HTTP/FTP Segmented Download
       Download a file
               aria2c "http://host/file.zip"

               Note
               aria2 uses 5 connections to download 1 file by default.

       Download a file using 1 connection
               aria2c -s1 "http://host/file.zip"

               Note
               aria2 uses 5 connections to download 1 file by default. -s1
               limits the number of connections to just 1.

               Note
               To stop a download, press Ctrl-C. You can resume the transfer
               by running aria2c with the same argument in the same directory.
               You can change URIs as long as they are pointing to the same
               file.

       Download a file from 2 different HTTP servers
               aria2c "http://host/file.zip" "http://mirror/file.zip"

       Download a file from HTTP and FTP servers
               aria2c "http://host1/file.zip" "ftp://host2/file.zip"

       Download files listed in a text file concurrently
               aria2c -ifiles.txt -j2

               Note
               -j option specifies the number of parallel downloads.

       Using proxy
           For HTTP:

               aria2c --http-proxy="http://proxy:8080" "http://host/file"

               aria2c --http-proxy="http://proxy:8080" --no-proxy="localhost,127.0.0.1,192.168.0.0/16" "http://host/file"

           For FTP:

               aria2c --ftp-proxy="http://proxy:8080" "ftp://host/file"

               Note
               See --http-proxy, --https-proxy, --ftp-proxy, --all-proxy and
               --no-proxy for details. You can specify proxy in the
               environment variables. See ENVIRONMENT section.

       Proxy with authorization
               aria2c --http-proxy="http://username:password@proxy:8080" "http://host/file"

               aria2c --http-proxy="http://proxy:8080" --http-proxy-user="username" --http-proxy-passwd="password" "http://host/file"

   Metalink Download
       Download files with remote Metalink
               aria2c --follow-metalink=mem "http://host/file.metalink"

       Download using a local metalink file
               aria2c -p --lowest-speed-limit=4000 file.metalink

               Note
               To stop a download, press Ctrl-C. You can resume the transfer
               by running aria2c with the same argument in the same directory.

       Download several local metalink files
               aria2c -j2 file1.metalink file2.metalink

       Download only selected files using index
               aria2c --select-file=1-4,8 file.metalink

               Note
               The index is printed to the console using -S option.

       Download a file using a local .metalink file with user preference
               aria2c --metalink-location=jp,us --metalink-version=1.1 --metalink-language=en-US file.metalink

   BitTorrent Download
       Download files from remote BitTorrent file
               aria2c --follow-torrent=mem "http://host/file.torrent"

       Download using a local torrent file
               aria2c --max-upload-limit=40K file.torrent

               Note
               --max-upload-limit specifies the max of upload rate.

               Note
               To stop a download, press Ctrl-C. You can resume the transfer
               by running aria2c with the same argument in the same directory.

       Download using BitTorrent Magnet URI
               aria2c "magnet:?xt=urn:btih:248D0A1CD08284299DE78D5C1ED359BB46717D8C&dn=aria2"

               Note
               Don't forget to quote BitTorrent Magnet URI which includes "&"
               character with single(') or double(") quotation.

       Download 2 torrents
               aria2c -j2 file1.torrent file2.torrent

       Download a file using torrent and HTTP/FTP server
               aria2c -Ttest.torrent "http://host1/file" "ftp://host2/file"

               Note
               Downloading multi file torrent with HTTP/FTP is not supported.

       Download only selected files using index(usually called "selectable
       download")
               aria2c --select-file=1-4,8 file.torrent

               Note
               The index is printed to the console using -S option.

       Specify output filename
           To specify output filename for BitTorrent downloads, you need to
           know the index of file in torrent file using -S option. For
           example, the output looks like this:

               idx|path/length
               ===+======================
                 1|dist/base-2.6.18.iso
                  |99.9MiB
               ---+----------------------
                 2|dist/driver-2.6.18.iso
                  |169.0MiB
               ---+----------------------

           To save dist/base-2.6.18.iso in /tmp/mydir/base.iso and
           dist/driver-2.6.18.iso in /tmp/dir/driver.iso, use the following
           command:

               aria2c --dir=/tmp --index-out=1=mydir/base.iso --index-out=2=dir/driver.iso file.torrent

       Change the listening port for incoming peer
               aria2c --listen-port=7000-7001,8000 file.torrent

               Note
               Since aria2 doesn't configure firewall or router for port
               forwarding, it's up to you to do it manually.

       Specify the condition to stop program after torrent download finished
               aria2c --seed-time=120 --seed-ratio=1.0 file.torrent

               Note
               In the above example, the program exits when the 120 minutes
               has elapsed since download completed or seed ratio reaches 1.0.

       Throttle upload speed
               aria2c --max-upload-limit=100K file.torrent

       Enable DHT
               aria2c --enable-dht --dht-listen-port=6881 file.torrent

               Note
               DHT uses udp port. Since aria2 doesn't configure firewall or
               router for port forwarding, it's up to you to do it manually.

   More advanced HTTP features
       Load cookies
               aria2c --load-cookies=cookies.txt "http://host/file.zip"

               Note
               You can use Firefox/Mozilla's cookie file without modification.

       Resume download started by web browsers or another programs
               aria2c -c -s2 "http://host/partiallydownloadedfile.zip"

       Client certificate authorization for SSL/TLS
               aria2c --certificate=/path/to/mycert.pem --private-key=/path/to/mykey.pem https://host/file

               Note
               The file specified in --private-key must be decrypted. The
               behavior when encrypted one is given is undefined.

       Verify peer in SSL/TLS using given CA certificates
               aria2c --ca-certificate=/path/to/ca-certificates.crt --check-certificate https://host/file

   And more advanced features
       Throttle download speed
               aria2c --max-download-limit=100K file.metalink

       Repair a damaged download
               aria2c -V file.metalink

               Note
               This option is only available used with BitTorrent or metalink
               with chunk checksums.

       Drop connection if download speed is lower than specified value
               aria2c --lowest-speed-limit=10K file.metalink

       Parameterized URI support
           You can specify set of parts:

               aria2c -P "http://{host1,host2,host3}/file.iso"

           You can specify numeric sequence:

               aria2c -Z -P "http://host/image[000-100].png"

               Note
               -Z option is required if the all URIs don't point to the same
               file, such as the above example.

           You can specify step counter:

               aria2c -Z -P "http://host/image[A-Z:2].png"

       Parallel downloads of arbitrary number of URI,metalink,torrent
               aria2c -j3 -Z "http://host/file1" file2.torrent file3.metalink

       BitTorrent Encryption
           Encrypt whole payload using ARC4:

               aria2c --bt-min-crypto-level=arc4 --bt-require-crypto=true file.torrent

SEE ALSO
       Project Web Site: http://aria2.sourceforge.net/

       aria2 Wiki: http://sourceforge.net/apps/trac/aria2/wiki

       Metalink Homepage: http://www.metalinker.org/

COPYRIGHT
       Copyright (C) 2006, 2010 Tatsuhiro Tsujikawa

       This program is free software; you can redistribute it and/or modify it
       under the terms of the GNU General Public License as published by the
       Free Software Foundation; either version 2 of the License, or (at your
       option) any later version.

       This program is distributed in the hope that it will be useful, but
       WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
       General Public License for more details.

       You should have received a copy of the GNU General Public License along
       with this program; if not, write to the Free Software Foundation, Inc.,
       51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

       In addition, as a special exception, the copyright holders give
       permission to link the code of portions of this program with the
       OpenSSL library under certain conditions as described in each
       individual source file, and distribute linked combinations including
       the two. You must obey the GNU General Public License in all respects
       for all of the code used other than OpenSSL. If you modify file(s) with
       this exception, you may extend this exception to your version of the
       file(s), but you are not obligated to do so. If you do not wish to do
       so, delete this exception statement from your version. If you delete
       this exception statement from all source files in the program, then
       also delete it here.

Aria2 1.9.1                       04/14/2010                         ARIA2C(1)
 

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