You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
33 lines
894 B
33 lines
894 B
'use strict'; |
|
|
|
var inherits = require('inherits') |
|
, AjaxBasedTransport = require('./lib/ajax-based') |
|
, XhrReceiver = require('./receiver/xhr') |
|
, XHRCorsObject = require('./sender/xhr-cors') |
|
, XHRLocalObject = require('./sender/xhr-local') |
|
; |
|
|
|
function XhrPollingTransport(transUrl) { |
|
if (!XHRLocalObject.enabled && !XHRCorsObject.enabled) { |
|
throw new Error('Transport created when disabled'); |
|
} |
|
AjaxBasedTransport.call(this, transUrl, '/xhr', XhrReceiver, XHRCorsObject); |
|
} |
|
|
|
inherits(XhrPollingTransport, AjaxBasedTransport); |
|
|
|
XhrPollingTransport.enabled = function(info) { |
|
if (info.nullOrigin) { |
|
return false; |
|
} |
|
|
|
if (XHRLocalObject.enabled && info.sameOrigin) { |
|
return true; |
|
} |
|
return XHRCorsObject.enabled; |
|
}; |
|
|
|
XhrPollingTransport.transportName = 'xhr-polling'; |
|
XhrPollingTransport.roundTrips = 2; // preflight, ajax |
|
|
|
module.exports = XhrPollingTransport;
|
|
|