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node_modules/engine.io-client/lib/xmlhttprequest.js
37 строк
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EvgeniyBudaev
Initial commit
17 фев 2020, 09:02
17 фев 2020, 09:02
bb6f06f
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// browser shim for xmlhttprequest module var hasCORS = require('has-cors'); module.exports = function (opts) { var xdomain = opts.xdomain; // scheme must be same when usign XDomainRequest // http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx var xscheme = opts.xscheme; // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default. // https://github.com/Automattic/engine.io-client/pull/217 var enablesXDR = opts.enablesXDR; // XMLHttpRequest can be disabled on IE try { if ('undefined' !== typeof XMLHttpRequest && (!xdomain || hasCORS)) { return new XMLHttpRequest(); } } catch (e) { } // Use XDomainRequest for IE8 if enablesXDR is true // because loading bar keeps flashing when using jsonp-polling // https://github.com/yujiosaka/socke.io-ie8-loading-example try { if ('undefined' !== typeof XDomainRequest && !xscheme && enablesXDR) { return new XDomainRequest(); } } catch (e) { } if (!xdomain) { try { return new self[['Active'].concat('Object').join('X')]('Microsoft.XMLHTTP'); } catch (e) { } } };