forked from sockjs/sockjs-node
/
sockjs.coffee
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/
sockjs.coffee
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# ***** BEGIN LICENSE BLOCK *****
# Copyright (c) 2011-2012 VMware, Inc.
#
# For the license see COPYING.
# ***** END LICENSE BLOCK *****
events = require('events')
fs = require('fs')
webjs = require('./webjs')
utils = require('./utils')
trans_websocket = require('./trans-websocket')
trans_jsonp = require('./trans-jsonp')
trans_xhr = require('./trans-xhr')
iframe = require('./iframe')
trans_eventsource = require('./trans-eventsource')
trans_htmlfile = require('./trans-htmlfile')
chunking_test = require('./chunking-test')
sockjsVersion = ->
try
pkg = fs.readFileSync(__dirname + '/../package.json', 'utf-8')
catch x
return if pkg then JSON.parse(pkg).version else null
class App extends webjs.GenericApp
welcome_screen: (req, res) ->
res.setHeader('content-type', 'text/plain; charset=UTF-8')
res.writeHead(200)
res.end("Welcome to SockJS!\n")
return true
handle_404: (req, res) ->
res.setHeader('content-type', 'text/plain; charset=UTF-8')
res.writeHead(404)
res.end('404 Error: Page not found\n')
return true
disabled_transport: (req, res, data) ->
return @handle_404(req, res, data)
h_sid: (req, res, data) ->
# Some load balancers do sticky sessions, but only if there is
# a JSESSIONID cookie. If this cookie isn't yet set, we shall
# set it to a dummy value. It doesn't really matter what, as
# session information is usually added by the load balancer.
req.cookies = utils.parseCookie(req.headers.cookie)
if typeof @options.jsessionid is 'function'
# Users can supply a function
@options.jsessionid(req, res)
else if (@options.jsessionid and res.setHeader)
# We need to set it every time, to give the loadbalancer
# opportunity to attach its own cookies.
jsid = req.cookies['JSESSIONID'] or 'dummy'
res.setHeader('Set-Cookie', 'JSESSIONID=' + jsid + '; path=/')
return data
log: (severity, line) ->
@options.log(severity, line)
utils.objectExtend(App.prototype, iframe.app)
utils.objectExtend(App.prototype, chunking_test.app)
utils.objectExtend(App.prototype, trans_websocket.app)
utils.objectExtend(App.prototype, trans_jsonp.app)
utils.objectExtend(App.prototype, trans_xhr.app)
utils.objectExtend(App.prototype, trans_eventsource.app)
utils.objectExtend(App.prototype, trans_htmlfile.app)
generate_dispatcher = (options) ->
p = (s) => new RegExp('^' + options.prefix + s + '[/]?$')
t = (s) => [p('/([^/.]+)/([^/.]+)' + s), 'server', 'session']
opts_filters = (options_filter='xhr_options') ->
return ['h_sid', 'xhr_cors', 'cache_for', options_filter, 'expose']
prefix_dispatcher = [
['GET', p(''), ['welcome_screen']],
['GET', p('/iframe[0-9-.a-z_]*.html'), ['iframe', 'cache_for', 'expose']],
['OPTIONS', p('/info'), opts_filters('info_options')],
['GET', p('/info'), ['xhr_cors', 'h_no_cache', 'info', 'expose']],
['OPTIONS', p('/chunking_test'), opts_filters()],
['POST', p('/chunking_test'), ['xhr_cors', 'expect_xhr', 'chunking_test']]
]
transport_dispatcher = [
['GET', t('/jsonp'), ['h_sid', 'h_no_cache', 'jsonp']],
['POST', t('/jsonp_send'), ['h_sid', 'h_no_cache', 'expect_form', 'jsonp_send']],
['POST', t('/xhr'), ['h_sid', 'h_no_cache', 'xhr_cors', 'xhr_poll']],
['OPTIONS', t('/xhr'), opts_filters()],
['POST', t('/xhr_send'), ['h_sid', 'h_no_cache', 'xhr_cors', 'expect_xhr', 'xhr_send']],
['OPTIONS', t('/xhr_send'), opts_filters()],
['POST', t('/xhr_streaming'), ['h_sid', 'h_no_cache', 'xhr_cors', 'xhr_streaming']],
['OPTIONS', t('/xhr_streaming'), opts_filters()],
['GET', t('/eventsource'), ['h_sid', 'h_no_cache', 'eventsource']],
['GET', t('/htmlfile'), ['h_sid', 'h_no_cache', 'htmlfile']],
]
# TODO: remove this code on next major release
if options.websocket
prefix_dispatcher.push(
['GET', p('/websocket'), ['raw_websocket']])
transport_dispatcher.push(
['GET', t('/websocket'), ['sockjs_websocket']])
else
# modify urls to return 404
prefix_dispatcher.push(
['GET', p('/websocket'), ['cache_for', 'disabled_transport']])
transport_dispatcher.push(
['GET', t('/websocket'), ['cache_for', 'disabled_transport']])
return prefix_dispatcher.concat(transport_dispatcher)
class Listener
constructor: (@options, emit) ->
@app = new App()
@app.options = @options
@app.emit = emit
@app.log('debug', 'SockJS v' + sockjsVersion() + ' ' +
'bound to ' + JSON.stringify(@options.prefix))
@dispatcher = generate_dispatcher(@options)
@webjs_handler = webjs.generateHandler(@app, @dispatcher)
@path_regexp = new RegExp('^' + @options.prefix + '([/].+|[/]?)$')
handler: (req, res, extra) =>
# All urls that match the prefix must be handled by us.
if not req.url.match(@path_regexp)
return false
@webjs_handler(req, res, extra)
return true
getHandler: () ->
return (a,b,c) => @handler(a,b,c)
class Server extends events.EventEmitter
constructor: (user_options) ->
@options =
prefix: ''
response_limit: 128*1024
websocket: true
faye_server_options: null
jsessionid: false
heartbeat_delay: 25000
disconnect_delay: 5000
log: (severity, line) -> console.log(line)
sockjs_url: 'https://cdn.jsdelivr.net/sockjs/1/sockjs.min.js'
if user_options
utils.objectExtend(@options, user_options)
listener: (handler_options) ->
options = utils.objectExtend({}, @options)
if handler_options
utils.objectExtend(options, handler_options)
return new Listener(options, => @emit.apply(@, arguments))
installHandlers: (http_server, handler_options) ->
handler = @listener(handler_options).getHandler()
utils.overshadowListeners(http_server, 'request', handler)
utils.overshadowListeners(http_server, 'upgrade', handler)
return true
middleware: (handler_options) ->
handler = @listener(handler_options).getHandler()
handler.upgrade = handler
return handler
exports.createServer = (options) ->
return new Server(options)
exports.listen = (http_server, options) ->
srv = exports.createServer(options)
if http_server
srv.installHandlers(http_server)
return srv