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34 lines
1016 B
34 lines
1016 B
'use strict';
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// The simplest and most robust transport, using the well-know cross
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// domain hack - JSONP. This transport is quite inefficient - one
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// message could use up to one http request. But at least it works almost
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// everywhere.
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// Known limitations:
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// o you will get a spinning cursor
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// o for Konqueror a dumb timer is needed to detect errors
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var inherits = require('inherits')
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, SenderReceiver = require('./lib/sender-receiver')
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, JsonpReceiver = require('./receiver/jsonp')
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, jsonpSender = require('./sender/jsonp')
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;
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function JsonPTransport(transUrl) {
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if (!JsonPTransport.enabled()) {
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throw new Error('Transport created when disabled');
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}
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SenderReceiver.call(this, transUrl, '/jsonp', jsonpSender, JsonpReceiver);
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}
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inherits(JsonPTransport, SenderReceiver);
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JsonPTransport.enabled = function() {
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return !!global.document;
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};
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JsonPTransport.transportName = 'jsonp-polling';
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JsonPTransport.roundTrips = 1;
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JsonPTransport.needBody = true;
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module.exports = JsonPTransport;
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