79 lines
1.8 KiB
JavaScript
79 lines
1.8 KiB
JavaScript
//GET: ajax(String url, Function success [,timeout])
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//POST: ajax(String url, Object postData, Function success [,timeout])
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Util.ajax = function (url, arg2, arg3, arg4) {
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if (typeof arg2 == 'function') {
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var success = arg2;
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var timeout = arg3 || 10000;
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}
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else {
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var postData = arg2;
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var success = arg3;
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var timeout = arg4 || 10000;
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}
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var start = new Date();
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console.log('AJAX - STARTING REQUEST', url, '(' + timeout + ')');
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//start new request
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var xhr = new XMLHttpRequest();
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xhr.onreadystatechange = function() {
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if (this.readyState == 4 && this.status == 200) {
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var result;
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//try to parse as json
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try {
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result = JSON.parse(this.response);
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console.log('AJAX - COMPLETE ('+(new Date()-start)+'ms) - json:', result);
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}
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catch (e) {
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result = this.response;
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console.log('AJAX - COMPLETE ('+(new Date()-start)+'ms) - string:', this.response, e);
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}
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//return result
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success(result);
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xhr = null;
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}
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else if (this.readyState == 4) {
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console.log('ajax failed', this.readyState, this.status);
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success({ error: 'failure' });
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}
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};
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xhr.ontimeout = function(e) {
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console.log('ajax request timed out')
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success({ error: 'timeout' });
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};
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if (postData) {
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//post request
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console.log('post data: ', postData instanceof FormData, postData);
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//the the input isn't already formdata, convert it to form data
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if (!(postData instanceof FormData)) {
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console.log('converting to form data');
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var formData = new FormData();
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for (var key in postData) {
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formData.append(key, postData[key]);
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}
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postData = formData;
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}
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//send to server
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xhr.open("POST", url, true);
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xhr.timeout = timeout;
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xhr.send(postData);
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}
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else {
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//get request
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xhr.open("GET", url, true);
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xhr.timeout = timeout;
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xhr.send();
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}
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return xhr;
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} |