mirror of
https://github.com/webtorrent/bittorrent-tracker.git
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53 lines
1.8 KiB
JavaScript
53 lines
1.8 KiB
JavaScript
module.exports = parseHttpRequest
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var common = require('./common')
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var REMOVE_IPV4_MAPPED_IPV6_RE = /^::ffff:/
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function parseHttpRequest (req, options) {
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var s = req.url.split('?')
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var params = common.querystringParse(s[1])
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if (s[0] === '/announce') {
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params.action = common.ACTIONS.ANNOUNCE
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if (typeof params.info_hash !== 'string' || params.info_hash.length !== 20)
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throw new Error('invalid info_hash')
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params.info_hash = common.binaryToHex(params.info_hash)
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if (typeof params.peer_id !== 'string' || params.peer_id.length !== 20)
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throw new Error('invalid peer_id')
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params.peer_id = common.binaryToHex(params.peer_id)
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params.port = Number(params.port)
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if (!params.port) throw new Error('invalid port')
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params.left = Number(params.left)
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params.compact = Number(params.compact)
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params.numwant = Math.min(
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Number(params.numwant) || common.NUM_ANNOUNCE_PEERS,
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common.MAX_ANNOUNCE_PEERS
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)
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params.ip = options.trustProxy
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? req.headers['x-forwarded-for'] || req.connection.remoteAddress
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: req.connection.remoteAddress.replace(REMOVE_IPV4_MAPPED_IPV6_RE, '') // force ipv4
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params.addr = (common.IPV6_RE.test(params.ip) ? '[' + params.ip + ']' : params.ip) + ':' + params.port
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} else if (s[0] === '/scrape') {
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params.action = common.ACTIONS.SCRAPE
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if (typeof params.info_hash === 'string')
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params.info_hash = [ params.info_hash ]
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if (Array.isArray(params.info_hash)) {
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params.info_hash = params.info_hash.map(function (binaryInfoHash) {
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if (typeof binaryInfoHash !== 'string' || binaryInfoHash.length !== 20)
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throw new Error('invalid info_hash')
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return common.binaryToHex(binaryInfoHash)
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})
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}
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} else {
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throw new Error('Invalid action in HTTP request: ' + params.action)
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}
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return params
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}
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