mirror of
https://github.com/Jermolene/TiddlyWiki5
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70a120d4a6
Now we get decent visual indication of sync errors, for instance. Still work to do to coalesce alerts so that the screen doesn’t fill up with them after an interval. And probably we should add a button to clear all alerts.
66 lines
1.7 KiB
JavaScript
66 lines
1.7 KiB
JavaScript
/*\
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title: $:/core/modules/utils/dom/http.js
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type: application/javascript
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module-type: utils
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Browser HTTP support
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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/*
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A quick and dirty HTTP function; to be refactored later. Options are:
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url: URL to retrieve
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type: GET, PUT, POST etc
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callback: function invoked with (err,data)
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*/
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exports.httpRequest = function(options) {
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var type = options.type || "GET",
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headers = options.headers || {accept: "application/json"},
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request = new XMLHttpRequest(),
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data = "",
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f,results;
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// Massage the data hashmap into a string
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if(options.data) {
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if(typeof options.data === "string") { // Already a string
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data = options.data;
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} else { // A hashmap of strings
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results = [];
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$tw.utils.each(options.data,function(dataItem,dataItemTitle) {
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results.push(dataItemTitle + "=" + encodeURIComponent(dataItem));
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});
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data = results.join("&");
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}
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}
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// Set up the state change handler
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request.onreadystatechange = function() {
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if(this.readyState === 4) {
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if(this.status === 200 || this.status === 204) {
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// Success!
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options.callback(null,this.responseText,this);
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return;
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}
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// Something went wrong
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options.callback("XMLHttpRequest error code: " + this.status);
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}
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};
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// Make the request
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request.open(type,options.url,true);
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if(headers) {
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$tw.utils.each(headers,function(header,headerTitle,object) {
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request.setRequestHeader(headerTitle,header);
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});
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}
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if(data && !$tw.utils.hop(headers,"Content-type")) {
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request.setRequestHeader("Content-type","application/x-www-form-urlencoded; charset=UTF-8");
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}
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request.send(data);
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return request;
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};
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})();
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