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mirror of https://github.com/Jermolene/TiddlyWiki5 synced 2024-11-30 13:29:56 +00:00
TiddlyWiki5/core/modules/utils/dom/http.js
Jeremy Ruston dbde2bf23b Started refactoring TiddlyWeb syncer into generic syncer + TiddlyWeb adaptor
The refactored plugin is `tiddlyweb2` for the moment. The idea is to be
able to use the same syncer with a different adaptor for syncing
changes to the local file system.
2013-03-17 15:28:49 +00:00

66 lines
1.7 KiB
JavaScript

/*\
title: $:/core/modules/utils/dom/http.js
type: application/javascript
module-type: utils
Browser HTTP support
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
/*
A quick and dirty HTTP function; to be refactored later. Options are:
url: URL to retrieve
type: GET, PUT, POST etc
callback: function invoked with (err,data)
*/
exports.httpRequest = function(options) {
var type = options.type || "GET",
headers = options.headers || {accept: "application/json"},
request = new XMLHttpRequest(),
data = "",
f,results;
// Massage the data hashmap into a string
if(options.data) {
if(typeof options.data === "string") { // Already a string
data = options.data;
} else { // A hashmap of strings
results = [];
$tw.utils.each(options.data,function(dataItem,dataItemTitle) {
results.push(dataItemTitle + "=" + encodeURIComponent(dataItem));
});
data = results.join("&");
}
}
// Set up the state change handler
request.onreadystatechange = function() {
if(this.readyState === 4) {
if(this.status === 200 || this.status === 204) {
// Success!
options.callback(null,this.responseText,this);
return;
}
// Something went wrong
options.callback(new Error("XMLHttpRequest error: " + this.status));
}
};
// Make the request
request.open(type,options.url,true);
if(headers) {
$tw.utils.each(headers,function(header,headerTitle,object) {
request.setRequestHeader(headerTitle,header);
});
}
if(data && !$tw.utils.hop(headers,"Content-type")) {
request.setRequestHeader("Content-type","application/x-www-form-urlencoded; charset=UTF-8");
}
request.send(data);
return request;
};
})();