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@tmeissner
Created July 30, 2013 08:10
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small javascript library for ajax & some other things
// variable to en-/disable debug
// set to 1 to enable debug log
if (DEBUG === undefined) {
var DEBUG;
}
var gcf = {
// decode special characters with their utf-8 representation
decodeHtml : function (token) {
var i,
y,
start = [33, 58, 91, 123, 161],
stop = [47, 64, 96, 126, 255],
startLength = start.length;
for (y = 0; y < startLength; y++) {
for (i = start[y]; i <= stop[y]; i++) {
token = token.replace("&#" + i +";", String.fromCharCode(255));
}
}
return token;
},
// get the path of the cgi-bin dir with correct http(s) protocol
// for using with ajax calls (to with same origin policy)
getCgiBinPath : function () {
// parse actual url and parse for protocol type (http/https)
// set the ajax server url dependent on the protocol
// for strato ssl-proxy, we have to insert the 1st part of the url path
var serverUrl = window.location.protocol + "//" + window.location.hostname;
if (serverUrl.indexOf("https") === -1) {
serverUrl += "/cgi-bin/";
} else {
serverUrl += "/" + window.location.pathname.split("/")[1] + "/cgi-bin/";
}
return serverUrl;
},
// xmlhttp object function
getHTTPObject : function () {
// debug log
if (DEBUG === 1) {console.log("xml http object function");}
// variable definitions
var xhr;
// check for availibility if xmlhttprequest object
if(window.XMLHttpRequest) {
xhr = new XMLHttpRequest();
} else if(window.ActiveXObject) {
xhr = new ActiveXObject("Msxml2.XMLHTTP");
}
return xhr;
},
// ajax call function
ajaxCall : function (dataUrl, outputElement, callback, responseType) {
// debug log
if (DEBUG === 1) {console.log("ajax function");}
// variable definitions
var response,
request = this.getHTTPObject(); // get the xmlhttp object which is supported
outputElement.innerHTML = "Lade Daten ...";
request.onreadystatechange = function() {
if(request.readyState === 4 && request.status === 200) {
//save ajax response
if (responseType === "json") {
response = JSON.parse(request.responseText);
} else if (responseType === "xml") {
response = request.responseXML;
} else {
response = request.responseText;
}
// check if callback is a function
if(typeof callback === "function") {
callback(response);
} else {
if (DEBUG === 1) {console.log(callback + " is no callback function");}
}
}
};
request.open("get", dataUrl, true);
request.send(null);
}
};
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