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https://github.com/transmission/transmission
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255 lines
8.8 KiB
Text
255 lines
8.8 KiB
Text
1. Introduction
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This document describes a protocol for interacting with Transmission
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sessions remotely.
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1.1 Terminology
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The JSON terminology in RFC 4627 is used. "array" is equivalent
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to a benc list; "object" is equivalent to a benc dictionary;
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an object's "keys" are the dictionary's string keys,
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and an object's "members" are its key/value pairs.
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2. Message Format
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Messages are formatted in a subset of JSON that understands
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arrays, maps, strings, and whole numbers with no exponentials --
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in short, the subset of JSON easily represented as bencoded data.
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Floating-point numbers are represented as strings.
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Booleans are represented as integers where 0 is false and 1 is true.
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Messages are represented as JSON objects. There are two types:
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requests (described in 2.1) and responses (described in 2.2).
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2.1. Requests
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Requests supports three keys:
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(1) A required "method" string telling the name of the method to invoke
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(2) An optional "arguments" object of name/value pairs
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(3) An optional "tag" integer used for clients to track responses.
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If provided by a request, the response MUST include the same tag.
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2.2. Responses
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Reponses support three keys:
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(1) A required "result" string whose value must be "success" on success,
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or an error string on failure.
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(2) An optional "arguments" object of name/value pairs
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(3) An optional "tag" integer as described in 2.1.
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2.3. Request IPC Notation
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As a convenience, a casual URI notation is supported for requests via the
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query portion of a URI. The advantage of this is that all current requests
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can be invoked via a very simple http GET request. The possible future
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disadvantage is that it limits nesting and listing structured requests.
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The URI notation works as follows:
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(1) Any key not "tag" or "method" is assumed to be in "arguments".
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(2) The "arguments" key isn't needed, since data isn't nested.
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(3) If the entire value in a key/value pair can be parsed as an integer,
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it's parsed into a JSON number.
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Otherwise, if the value can be parsed as comma-delimited integers,
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it's parsed into a JSON array of integers.
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Otherwise, the value is treated as a string.
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Examples:
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?method=torrent-start&ids=1,2
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?method=session-set&speed-limit-down=50&speed-limit-down-enabled=1
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3. Torrent Requests
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3.1. Torrent Action Requests
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Method name | libtransmission function
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--------------------+-------------------------------------------------
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"torrent-close" | tr_torrentClose
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"torrent-remove" | tr_torrentRemove
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"torrent-start" | tr_torrentStart
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"torrent-stop" | tr_torrentStop
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"torrent-verify" | tr_torrentVerify
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Request arguments: "ids", a list of torrent id integers, sha1 hash strings,
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or both. These are the torrents that the request will
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be applied to. If "ids" is ommitted, the request is
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applied to all torrents.
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Response arguments: none
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3.2. Torrent List
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Method name: "torrent-list".
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Request arguments: none.
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Response arguments: "list", an array of objects that contain two keys:
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a torrent's name string, and its unique torrent id.
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3.3. Torrent Info Requests
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Method name: "torrent-info".
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Request arguments: 3.1's optional "ids" argument.
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Response arguments: "torrent-info", an array of objects based on
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libtransmission's tr_info struct but different in the following ways:
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(1) the torrent's "id" field is added.
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(2) tr_info's "hash" field is omitted.
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(3) tr_info's "pieces" field is omitted.
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(4) tr_file's "firstPiece", "lastPiece", and "offset" fields are omitted.
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Note that this is a fairly high-bandwidth request and that its results
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don't change. You should try to cache its results instead of re-calling it.
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Example Request:
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{
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"arguments": { "ids": [ 7, 10 ] }
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"method": "torrent-info",
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"tag": 39693
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}
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Example Response:
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{
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"tag": 39693
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"result": "success",
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"arguments": {
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"torrent-info": [
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{
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"id": 7,
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"name": "Ubuntu x86_64 DVD",
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"pieceCount": 1209233,
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"pieceSize": 4096,
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"totalSize": 9803930483,
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...
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},
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{
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"id": 10,
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"name": "Ubuntu i386 DVD",
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"pieceCount": 83943,
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"pieceSize": 12345,
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"totalSize": 2398480394,
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...
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}
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]
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}
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}
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3.4. Torrent Status Requests
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Method name: "torrent-status"
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Request arguments: 3.1's optional "ids" argument.
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Response arguments: "torrent-status", an array of objects based
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on libtransmission's tr_stat struct but differerent in the
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following ways:
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(1) the torrent's "id" field is added.
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(2) tr_info's "name" field is added.
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(3) tr_stat's "tracker" field is omitted, and is instead
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replaced with two strings: "announce-url" and scrape-url"
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3.5. Adding a Torrent
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Method name: "torrent-add"
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Request arguments:
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string | value type & description
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-------------------+-------------------------------------------------
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"download-dir" | string path to download the torrent to
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"filename" | string location of the .torrent file
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"metainfo" | string base64-encoded .torrent content
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"paused" | boolean if true, don't start the torrent
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"peer-limit" | int maximum number of peers
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Either "filename" OR "metainfo" must be included.
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All other arguments are optional.
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Response arguments: on success, a "torrent-added" object in the
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form of one of 3.3's tr_info objects.
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3.6. Other torrent settings
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Common arguments:
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string | value type & description
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---------------------------+-------------------------------------------------
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"peer-limit" | int maximum number of peers
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"speed-limit-down" | int maximum download speed (in KiB/s)
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"speed-limit-down-enabled" | boolean true if the download speed is limited
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"speed-limit-up" | int maximum upload speed (in KiB/s)
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"speed-limit-up-enabled" | boolean true if the upload speed is limited
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3.6.1. Mutators
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Method name: "torrent-set"
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Request arguments: 3.1's "ids", plus one or more of 3.6's arguments
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Response arguments: none
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3.6.2. Accessors
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Method name: "torrent-get"
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Request arguments: none
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Response arguments: A "torrents" list of objects containing all
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of 3.6's arguments plus the torrent's "id" int.
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3.7 File Priorities
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Common arguments:
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string | value type & description
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-------------------+-------------------------------------------------
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"files-wanted" | array indices of one or more file to download
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"files-unwanted" | array indices of one or more file to not download
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"priority-high" | array indices of one or more high-priority files
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"priority-low" | array indices of one or more low-priority files
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"priority-normal" | array indices of one or more normal-priority files
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3.7.1. Mutators
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Method name: "torrent-set-priorities"
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Request arguments: 3.1's "ids", plus one or more of 3.7's arguments
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Response arguments: none
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3.7.2. Accessors
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Method name: "torrent-get-priorities"
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Request arguments: none
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Response arguments: A "torrents" list of objects containing all
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of 3.7's arguments plus the torrent's "id" int.
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4. Session Status Requests
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4.1. Session Arguments
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string | value type & description
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---------------------------+-------------------------------------------------
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"encryption" | string "required", "preferred", "tolerated"
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"download-dir" | string default path to download torrents
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"peer-limit" | int maximum global number of peers
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"pex-allowed" | boolean true means allow pex in public torrents
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"port" | int port number
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"port-forwarding-enabled" | boolean true means enabled.
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"speed-limit-down" | int max global download speed (in KiB/s)
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"speed-limit-down-enabled" | int max global download speed (in KiB/s)
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"speed-limit-up" | int max global upload speed (in KiB/s)
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"speed-limit-up-enabled" | int max global upload speed (in KiB/s)
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4.2. Mutators
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Method name: "session-set"
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Request arguments: one or more of 4.1's arguments
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Response arguments: none
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4.2. Accessors
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Method name: "session-get"
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Request arguments: none
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Response arguments: all of 4.1's arguments
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