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41 lines
1.2 KiB
41 lines
1.2 KiB
'use strict'; |
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var inherits = require('inherits') |
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, AjaxBasedTransport = require('./lib/ajax-based') |
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, XhrReceiver = require('./receiver/xhr') |
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, XHRCorsObject = require('./sender/xhr-cors') |
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, XHRLocalObject = require('./sender/xhr-local') |
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, browser = require('../utils/browser') |
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; |
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function XhrStreamingTransport(transUrl) { |
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if (!XHRLocalObject.enabled && !XHRCorsObject.enabled) { |
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throw new Error('Transport created when disabled'); |
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} |
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AjaxBasedTransport.call(this, transUrl, '/xhr_streaming', XhrReceiver, XHRCorsObject); |
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} |
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inherits(XhrStreamingTransport, AjaxBasedTransport); |
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XhrStreamingTransport.enabled = function(info) { |
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if (info.nullOrigin) { |
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return false; |
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} |
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// Opera doesn't support xhr-streaming #60 |
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// But it might be able to #92 |
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if (browser.isOpera()) { |
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return false; |
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} |
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return XHRCorsObject.enabled; |
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}; |
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XhrStreamingTransport.transportName = 'xhr-streaming'; |
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XhrStreamingTransport.roundTrips = 2; // preflight, ajax |
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// Safari gets confused when a streaming ajax request is started |
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// before onload. This causes the load indicator to spin indefinetely. |
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// Only require body when used in a browser |
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XhrStreamingTransport.needBody = !!global.document; |
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module.exports = XhrStreamingTransport;
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