AJAX responseXML错误

几年前我遇到了同样的问题，然后我放弃了responseXML并开始始终使用responseText。这个解析函数一直对我有用：

function parseXml(xmlText){    try{        var text = xmlText;        //text = replaceAll(text,"&lt;","<");        //text = replaceAll(text,"&gt;",">");        //text = replaceAll(text,"&quot;",""");        //alert(text);        //var myWin = window.open('','win','resize=yes,scrollbars=yes');        //myWin.document.getElementsByTagName('body')[0].innerHTML = text;        if (typeof DOMParser != "undefined") {  // Mozilla, Firefox, and related browsers  var parser=new DOMParser(); var doc=parser.parseFromString(text,"text/xml"); //alert(text); return doc;         }else if (typeof ActiveXObject != "undefined") {  // Internet Explorer.         var doc = new ActiveXObject("Microsoft.XMLDOM");  // Create an empty document  doc.loadXML(text); // Parse text into it  return doc;        // Return it         }else{  // As a last resort, try loading the document from a data: URL  // This is supposed to work in Safari. Thanks to Manos Batsis and  // his Sarissa library (sarissa.sourceforge.net) for this technique.  var url = "data:text/xml;charset=utf-8," + enpreURIComponent(text);  var request = new XMLHttpRequest();  request.open("GET", url, false);  request.send(null);  return request.responseXML;         }    }catch(err){        alert("There was a problem parsing the xml:n" + err.message);    }}

使用此XMLHttpRequest对象：

// The XMLHttpRequest class objectdebug = false;function Request (url,oFunction,type) {    this.funct = "";    // this.req = "";    this.url = url;    this.oFunction = oFunction;    this.type = type;    this.doXmlhttp = doXmlhttp;    this.loadXMLDoc = loadXMLDoc;}function doXmlhttp() {    //var funct = "";    if (this.type == 'text') {        this.funct = this.oFunction + '(req.responseText)';    } else {        this.funct = this.oFunction + '(req.responseXML)';    }    this.loadXMLDoc();    return false;}function loadXMLDoc() {    //alert(url);    var functionA = this.funct;    var req;    req = false;    function processReqChange() {        // alert('reqChange is being called');        // only if req shows "loaded"        if (req.readyState == 4) { // only if "OK" if (req.status == 200) {     // ...processing statements go here...     eval(functionA);     if(debug){         var debugWin = window.open('','aWindow','width=600,height=600,scrollbars=yes');         debugWin.document.body.innerHTML = req.responseText;     } } else {     alert("There was a problem retrieving the data:n" +         req.statusText + 'nstatus: ' + req.status);     if(debug){         var debugWin = window.open('','aWindow','width=600,height=600,scrollbars=yes');         debugWin.document.body.innerHTML = req.responseText;     } } }    }    // branch for native XMLHttpRequest object    if(window.XMLHttpRequest) {        try { req = new XMLHttpRequest();        } catch(e) { req = false;        }    // branch for IE/Windows ActiveX version    } else if(window.ActiveXObject) {        try {     req = new ActiveXObject("Msxml2.XMLHTTP");        } catch(e) {     try {         req = new ActiveXObject("Microsoft.XMLHTTP");     } catch(e) {         req = false;     }        }    }    if(req) {        req.onreadystatechange = processReqChange;        if(this.url.length > 2000){ var urlSpl = this.url.split('?'); req.open("POST",urlSpl[0],true); req.setRequestHeader('Content-Type','application/x-www-form-urlenpred'); req.send(urlSpl[1]);        } else { req.open("GET", this.url, true); req.send("");        }    }}function browserSniffer(){    if(navigator.userAgent.toLowerCase().indexOf("msie") != -1){        if(navigator.userAgent.toLowerCase().indexOf("6")){ return 8;        }else{ return 1;        }    }    if(navigator.userAgent.toLowerCase().indexOf("firefox") != -1){        return 2;    }    if(navigator.userAgent.toLowerCase().indexOf("opera") != -1){        return 3;    }    if(navigator.userAgent.toLowerCase().indexOf("safari") != -1){        return 4;    }    return 5;}

当然，这是很旧的代码，但是它在我几年前建立的网站上仍然对我有用。尽管现在我通常使用框架，但我与其他所有人都同意，因此我不再需要使用此代码或类似的代码。

您可以使用Request
onreadystate函数中的split等忽略某些细节。如果请求的长度大于某个长度，应该将其转换为帖子，但是我只是认为做一个帖子总是更好。