view mod_json_streams/strophe.jsonstreams.js @ 4976:75b6e5df65f9

various: Improve error reporting if missing file server module on 0.12 If there is some error loading net.http.files then it would be swallowed by the pcall and then it would proceed to trying mod_http_files, which might cause unexpected behavior on 0.12 Ref #1765
author Kim Alvefur <zash@zash.se>
date Mon, 18 Jul 2022 22:47:54 +0200
parents 7dbde05b48a9
children
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/* jsonstreams plugin
**
** This plugin upgrades Strophe to support XEP-0295: JSON Encodings for XMPP
**
*/

Strophe.addConnectionPlugin('jsonstreams', {
    init: function (conn) {

        var parseXMLString = function(xmlStr) {
			var xmlDoc = null;
			if (window.ActiveXObject) {
				xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
				xmlDoc.async=false;
				xmlDoc.loadXML(xmlStr);
			} else {
				var parser = new DOMParser();
				xmlDoc = parser.parseFromString(xmlStr, "text/xml");
			}
			return xmlDoc;
        }

        // replace Strophe.Request._newXHR with new jsonstreams version
        // if JSON is detected
        if (window.JSON) {
        	var _newXHR = Strophe.Request.prototype._newXHR;
            Strophe.Request.prototype._newXHR = function () {
            	var _xhr = _newXHR.apply(this, arguments);
                var xhr = {
                	readyState: 0,
                	responseText: null,
                	responseXML: null,
                	status: null,
                	open: function(a, b, c) { return _xhr.open(a, b, c) },
                	abort: function() { _xhr.abort(); },
                	send: function(data) {
                		data = JSON.stringify({"s":data});
                		return _xhr.send(data);
                	}
                };
                var req = this;
                xhr.onreadystatechange = this.func.bind(null, this);
                _xhr.onreadystatechange = function() {
                	xhr.readyState = _xhr.readyState;
                	if (xhr.readyState != 4) {
                		xhr.status = 0;
                		xhr.responseText = "";
                		xhr.responseXML = null;
                	} else {
	                	xhr.status = _xhr.status;
	               		xhr.responseText = _xhr.responseText;
	               		xhr.responseXML = _xhr.responseXML;
	                	if (_xhr.responseText && !(_xhr.responseXML
	                			&& _xhr.responseXML.documentElement
	                			&& _xhr.responseXML.documentElement.tagName != "parsererror")) {
	                		var data = JSON.parse(_xhr.responseText);
	                		if (data && data.s) {
	                			xhr.responseText = data.s;
	                			xhr.responseXML = parseXMLString(data.s);
	                		}
	                	}
	                }
                	if ("function" == typeof xhr.onreadystatechange) { xhr.onreadystatechange(req); }
                }
                return xhr;
            };
        } else {
            Strophe.error("jsonstreams plugin loaded, but JSON not found." +
                          "  Falling back to native XHR implementation.");
        }
    }
});