forked from I2P_Developers/i2p.i2p
65 lines
2.0 KiB
JavaScript
65 lines
2.0 KiB
JavaScript
var fails = 0;
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function ajax(url, target, refresh) {
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// native XMLHttpRequest object
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if (window.XMLHttpRequest) {
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req = new XMLHttpRequest();
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req.onreadystatechange = function() {ajaxDone(url, target, refresh);};
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req.open("GET", url, true);
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// IE https://www.jamesmaurer.com/ajax-refresh-problem-w-ie-not-refreshing.asp
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req.setRequestHeader("If-Modified-Since","Sat, 1 Jan 2000 00:00:00 GMT");
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req.send(null);
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// IE/Windows ActiveX version
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} else if (window.ActiveXObject) {
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req = new ActiveXObject("Microsoft.XMLDOM");
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if (req) {
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req.onreadystatechange = function() {ajaxDone(target);};
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req.open("GET", url, true);
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// IE https://www.jamesmaurer.com/ajax-refresh-problem-w-ie-not-refreshing.asp
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req.setRequestHeader("If-Modified-Since","Sat, 1 Jan 2000 00:00:00 GMT");
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req.send(null);
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}
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}
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}
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function ajaxDone(url, target, refresh) {
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// only if req is "loaded"
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if (req.readyState == 4) {
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var fail = false;
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var running = true;
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var done = false;
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// only if "OK"
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if (req.status == 200) {
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// output 1 for complete, 0 + status string for in progress
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fails = 0;
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var status;
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// IE doesn't support startsWith()
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if (req.responseText.indexOf("1") == 0) {
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results = doneMessage;
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running = false;
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done = true;
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status = "";
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} else {
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results = progressMessage;
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status = req.responseText.substring("1")
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}
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document.getElementById("xhr2").innerHTML = status;
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document.getElementById(target).innerHTML = results;
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} else if (fails == 0) {
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// avoid spurious message if cancelled by user action
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fails++;
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} else {
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document.getElementById(target).innerHTML = failMessage;
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running = false;
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fail = true;
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}
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var form = document.forms[0];
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form.prev.disabled = fail || !done;
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form.skip.disabled = !done;
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form.cancelbw.disabled = !running;
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form.next.disabled = fail || !done;
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setTimeout(function() {ajax(url, target, refresh);}, refresh);
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}
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}
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