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59 lines
2.0 KiB
JavaScript
59 lines
2.0 KiB
JavaScript
'use strict'
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let WebSocketServer = require('ws').Server
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const UNSUPPORTED_DATA = 1007
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const POLICY_VIOLATION = 1008
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const CLOSE_UNSUPPORTED = 1003
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var run = module.exports.run = function(server) {
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server.on('connection', (socket) => {
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socket.on('message', (data) => {
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try {
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let msg = JSON.parse(data)
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if (msg.hasOwnProperty('key')) {
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for (let master of server.clients) {
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if (master.key === msg.key) {
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socket.close(POLICY_VIOLATION, 'The key already exists')
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return
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}
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}
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socket.key = msg.key
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socket.joiningClients = []
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} else if (msg.hasOwnProperty('id')) {
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for (let index in socket.joiningClients) {
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if (index == msg.id) {
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socket.joiningClients[index].send(JSON.stringify({data: msg.data}))
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return
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}
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}
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socket.close(POLICY_VIOLATION, 'Unknown id')
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} else if (msg.hasOwnProperty('join')) {
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for (let master of server.clients) {
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if (master.key === msg.join) {
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socket.master = master
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master.joiningClients.push(socket)
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let id = master.joiningClients.length - 1
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master.send(JSON.stringify({id, data: msg.data}))
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return
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}
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}
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socket.close(POLICY_VIOLATION, 'Unknown key')
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} else if (msg.hasOwnProperty('data') && socket.hasOwnProperty('master')) {
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let id = socket.master.joiningClients.indexOf(socket)
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socket.master.send(JSON.stringify({id, data: msg.data}))
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} else {
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socket.close(UNSUPPORTED_DATA, 'Unsupported message format')
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}
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} catch (event) {
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socket.close(CLOSE_UNSUPPORTED, 'Server accepts only JSON')
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}
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})
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socket.on('close', (event) => {
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if (socket.hasOwnProperty('joiningClients')) {
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for (let client of socket.joiningClients) {
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client.close(POLICY_VIOLATION, 'The peer is no longer available')
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}
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}
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});
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})
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} |