bittorrent-tracker/lib/parse-websocket.js
Feross Aboukhadijeh 2dc56de223 rename files
2015-07-29 00:06:59 -07:00

37 lines
1.1 KiB
JavaScript

module.exports = parseWebSocketRequest
var common = require('./common')
function parseWebSocketRequest (socket, params) {
params = JSON.parse(params) // may throw
params.action = common.ACTIONS.ANNOUNCE
params.socket = socket
if (typeof params.info_hash !== 'string' || params.info_hash.length !== 20) {
throw new Error('invalid info_hash')
}
params.info_hash = common.binaryToHex(params.info_hash)
if (typeof params.peer_id !== 'string' || params.peer_id.length !== 20) {
throw new Error('invalid peer_id')
}
params.peer_id = common.binaryToHex(params.peer_id)
if (params.answer) {
if (typeof params.to_peer_id !== 'string' || params.to_peer_id.length !== 20) {
throw new Error('invalid `to_peer_id` (required with `answer`)')
}
params.to_peer_id = common.binaryToHex(params.to_peer_id)
}
params.left = Number(params.left) || Infinity
params.numwant = Math.min(
Number(params.offers && params.offers.length) || 0, // no default - explicit only
common.MAX_ANNOUNCE_PEERS
)
params.compact = -1 // return full peer objects (used for websocket responses)
return params
}