130 lines
3.8 KiB
JavaScript
130 lines
3.8 KiB
JavaScript
/*
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DOMLoader.XMLHttp
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--------------------------
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DOMLoader.sendRequest({
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url: "./dir/something.extension",
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data: "test!",
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onerror: function(event) {
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console.log(event);
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},
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onload: function(response) {
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console.log(response.responseText);
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},
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onprogress: function (event) {
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var percent = event.loaded / event.total * 100 >> 0;
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loader.message("loading: " + percent + "%");
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}
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});
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*/
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if (typeof(DOMLoader) === "undefined") var DOMLoader = {};
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// Add XMLHttpRequest when not available
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if (typeof (XMLHttpRequest) === "undefined") {
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var XMLHttpRequest;
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(function () { // find equivalent for IE
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var factories = [
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function () {
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return new ActiveXObject("Msxml2.XMLHTTP")
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}, function () {
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return new ActiveXObject("Msxml3.XMLHTTP")
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}, function () {
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return new ActiveXObject("Microsoft.XMLHTTP")
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}];
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for (var i = 0; i < factories.length; i++) {
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try {
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factories[i]();
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} catch (e) {
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continue;
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}
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break;
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}
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XMLHttpRequest = factories[i];
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})();
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}
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if (typeof ((new XMLHttpRequest()).responseText) === "undefined") {
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// http://stackoverflow.com/questions/1919972/how-do-i-access-xhr-responsebody-for-binary-data-from-javascript-in-ie
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var IEBinaryToArray_ByteStr_Script =
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"<!-- IEBinaryToArray_ByteStr -->\r\n"+
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"<script type='text/vbscript'>\r\n"+
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"Function IEBinaryToArray_ByteStr(Binary)\r\n"+
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" IEBinaryToArray_ByteStr = CStr(Binary)\r\n"+
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"End Function\r\n"+
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"Function IEBinaryToArray_ByteStr_Last(Binary)\r\n"+
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" Dim lastIndex\r\n"+
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" lastIndex = LenB(Binary)\r\n"+
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" if lastIndex mod 2 Then\r\n"+
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" IEBinaryToArray_ByteStr_Last = Chr( AscB( MidB( Binary, lastIndex, 1 ) ) )\r\n"+
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" Else\r\n"+
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" IEBinaryToArray_ByteStr_Last = "+'""'+"\r\n"+
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" End If\r\n"+
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"End Function\r\n"+
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"</script>\r\n";
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// inject VBScript
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document.write(IEBinaryToArray_ByteStr_Script);
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DOMLoader.sendRequest = function(conf) {
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// helper to convert from responseBody to a "responseText" like thing
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function getResponseText(binary) {
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var byteMapping = {};
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for (var i = 0; i < 256; i++) {
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for (var j = 0; j < 256; j++) {
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byteMapping[String.fromCharCode(i + j * 256)] = String.fromCharCode(i) + String.fromCharCode(j);
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}
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}
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// call into VBScript utility fns
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var rawBytes = IEBinaryToArray_ByteStr(binary);
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var lastChr = IEBinaryToArray_ByteStr_Last(binary);
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return rawBytes.replace(/[\s\S]/g, function (match) {
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return byteMapping[match];
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}) + lastChr;
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};
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//
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var req = XMLHttpRequest();
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req.open("GET", conf.url, true);
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if (conf.responseType) req.responseType = conf.responseType;
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if (conf.onerror) req.onerror = conf.onerror;
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if (conf.onprogress) req.onprogress = conf.onprogress;
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req.onreadystatechange = function (event) {
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if (req.readyState === 4) {
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if (req.status === 200) {
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req.responseText = getResponseText(req.responseBody);
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} else {
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req = false;
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}
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if (conf.onload) conf.onload(req);
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}
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};
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req.setRequestHeader("Accept-Charset", "x-user-defined");
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req.send(null);
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return req;
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}
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} else {
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DOMLoader.sendRequest = function(conf) {
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var req = new XMLHttpRequest();
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req.open(conf.data ? "POST" : "GET", conf.url, true);
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if (req.overrideMimeType) req.overrideMimeType("text/plain; charset=x-user-defined");
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if (conf.data) req.setRequestHeader('Content-type','application/x-www-form-urlencoded');
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if (conf.responseType) req.responseType = conf.responseType;
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if (conf.onerror) req.onerror = conf.onerror;
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if (conf.onprogress) req.onprogress = conf.onprogress;
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req.onreadystatechange = function (event) {
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if (req.readyState === 4) {
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if (req.status !== 200 && req.status != 304) {
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if (conf.onerror) conf.onerror(event, false);
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return;
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}
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if (conf.onload) {
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conf.onload(req);
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}
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}
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};
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req.send(conf.data);
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return req;
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};
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} |