javascript 未捕获的语法错误：意外的令牌
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时间：2020-10-26 01:46:21 来源:igfitidea点击:
Uncaught SyntaxError: Unexpected token
提问by om sai
I have following script which is used to post comments. But when I try to submit the comment Google Chrome throws this error:
我有以下用于发表评论的脚本。但是当我尝试提交评论时，谷歌浏览器会抛出这个错误：
Uncaught SyntaxError: Unexpected token <
未捕获的语法错误：意外的标记 <
jax.processResponse
jax.processResponse
xmlhttp.onreadystatechange
xmlhttp.onreadystatechange
I simply don't know what this error is all about.
我只是不知道这个错误是怎么回事。
function Jax() {
var loadingTimeout = 400;
var iframe;
this.loadingFunction = function () {};
this.doneLoadingFunction = function () {};
this.stringify = function (arg) {
var c, i, l, o, u, v;
switch (typeof arg) {
case "object":
if (arg) {
if (arg.constructor == Array) {
o = "";
for (i = 0; i < arg.length; ++i) {
v = this.stringify(arg[i]);
if (o && (v !== u)) {
o += ","
}
if (v !== u) {
o += v
}
}
return "[" + o + "]"
} else {
if (typeof arg.toString != "undefined") {
o = "";
for (i in arg) {
v = this.stringify(arg[i]);
if (v !== u) {
if (o) {
o += ","
}
o += this.stringify(i) + ":" + v
}
}
return "{" + o + "}"
} else {
return
}
}
}
return "";
case "unknown":
case "undefined":
case "function":
return u;
case "string":
arg = arg.replace(/"/g, '\"');
l = arg.length;
o = '"';
for (i = 0; i < l; i += 1) {
c = arg.charAt(i);
if (c >= " ") {
if (c == "\" || c == '"') {
o += "\"
}
o += c
} else {
switch (c) {
case '"':
o += '\"';
break;
case "\b":
o += "\b";
break;
case "\f":
o += "\f";
break;
case "\n":
o += "\n";
break;
case "\r":
o += "\r";
break;
case "\t":
o += "\t";
break;
default:
c = c.charCodeAt();
o += "\u00";
o += Math.floor(c / 16).toString(16);
o += (c % 16).toString(16)
}
}
}
return o + '"';
default:
return String(arg)
}
};
this.getRequestObject = function () {
if (window.XMLHttpRequest) {
http_request = new XMLHttpRequest()
} else {
if (window.ActiveXObject) {
var msxmlhttp = new Array("Msxml2.XMLHTTP.4.0", "Msxml2.XMLHTTP.3.0", "Msxml2.XMLHTTP", "Microsoft.XMLHTTP");
for (var i = 0; i < msxmlhttp.length; i++) {
try {
http_request = new ActiveXObject(msxmlhttp[i])
} catch (e) {
http_request = null
}
}
}
}
if (!http_request) {
alert("Unfortunatelly you browser doesn't support this feature.");
return false
}
return http_request
};
this.$ = function (sId) {
if (!sId) {
return null
}
var returnObj = document.getElementById(sId);
if (!returnObj && document.all) {
returnObj = document.all[sId]
}
return returnObj
};
this.addEvent = function (obj, type, fn) {
if (obj.attachEvent) {
obj["e" + type + fn] = fn;
obj[type + fn] = function () {
obj["e" + type + fn](window.event)
};
obj.attachEvent("on" + type, obj[type + fn])
} else {
obj.addEventListener(type, fn, false)
}
};
this.removeEvent = function (obj, type, fn) {
if (obj.detachEvent) {
obj.detachEvent("on" + type, obj[type + fn]);
obj[type + fn] = null
} else {
obj.removeEventListener(type, fn, false)
}
};
this.submitITask = function (comName, func, postData, responseFunc) {
var xmlReq = this.buildXmlReq(comName, func, postData, responseFunc, true);
this.loadingFunction();
if (!this.iframe) {
this.iframe = document.createElement("iframe");
this.iframe.setAttribute("id", "ajaxIframe");
this.iframe.setAttribute("height", 0);
this.iframe.setAttribute("width", 0);
this.iframe.setAttribute("border", 0);
this.iframe.style.visibility = "hidden";
document.body.appendChild(this.iframe);
this.iframe.src = xmlReq
} else {
this.iframe.src = xmlReq
}
};
this.extractIFrameBody = function (iFrameEl) {
var doc = null;
if (iFrameEl.contentDocument) {
doc = iFrameEl.contentDocument
} else {
if (iFrameEl.contentWindow) {
doc = iFrameEl.contentWindow.document
} else {
if (iFrameEl.document) {
doc = iFrameEl.document
} else {
alert("Error: could not find sumiFrame document");
return null
}
}
}
return doc.body
};
this.buildXmlReq = function (comName, func, postData, responseFunc, iframe) {
var xmlReq = "";
if (iframe) {
xmlReq += "?"
} else {
xmlReq += "&"
}
xmlReq += "option=" + comName;
xmlReq += "&no_html=1";
xmlReq += "&task=azrul_ajax";
xmlReq += "&func=" + func;
xmlReq += "&" + jax_token_var + "=1";
if (postData) {
xmlReq += "&" + postData
}
return xmlReq
};
this.submitTask = function (comName, func, postData, responseFunc) {
var xmlhttp = this.getRequestObject();
var targetUrl = jax_live_site;
xmlhttp.open("POST", targetUrl, true);
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4) {
if (xmlhttp.status == 200) {
jax.doneLoadingFunction();
jax.processResponse(xmlhttp.responseText)
} else {}
}
};
var id = 1;
var xmlReq = this.buildXmlReq(comName, func, postData, responseFunc);
this.loadingFunction();
xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xmlhttp.send(xmlReq)
};
this.processIResponse = function () {
jax.doneLoadingFunction();
var resp = (this.extractIFrameBody(this.iframe).innerHTML);
resp = resp.replace(/</g, "<");
resp = resp.replace(/>/g, ">");
resp = resp.replace(/&/g, "&");
resp = resp.replace(/"/g, '"');
resp = resp.replace(/'/g, "'");
this.processResponse(resp)
};
this.BetterInnerHTML = function (o, p, q) {
function r(a) {
var b;
if (typeof DOMParser != "undefined") {
b = (new DOMParser()).parseFromString(a, "application/xml")
} else {
var c = ["MSXML2.DOMDocument", "MSXML.DOMDocument", "Microsoft.XMLDOM"];
for (var i = 0; i < c.length && !b; i++) {
try {
b = new ActiveXObject(c[i]);
b.loadXML(a)
} catch (e) {}
}
}
return b
}
function s(a, b, c) {
a[b] = function () {
return eval(c)
}
}
function t(b, c, d) {
if (typeof d == "undefined") {
d = 1
}
if (d > 1) {
if (c.nodeType == 1) {
var e = document.createElement(c.nodeName);
var f = {};
for (var a = 0, g = c.attributes.length; a < g; a++) {
var h = c.attributes[a].name,
k = c.attributes[a].value,
l = (h.substr(0, 2) == "on");
if (l) {
f[h] = k
} else {
switch (h) {
case "class":
e.className = k;
break;
case "for":
e.htmlFor = k;
break;
default:
e.setAttribute(h, k)
}
}
}
b = b.appendChild(e);
for (l in f) {
s(b, l, f[l])
}
} else {
if (c.nodeType == 3) {
var m = (c.nodeValue ? c.nodeValue : "");
var n = m.replace(/^\s*|\s*$/g, "");
if (n.length < 7 || (n.indexOf("<!--") != 0 && n.indexOf("-->") != (n.length - 3))) {
b.appendChild(document.createTextNode(m))
}
}
}
}
for (var i = 0, j = c.childNodes.length; i < j; i++) {
t(b, c.childNodes[i], d + 1)
}
}
p = "<root>" + p + "</root>";
var u = r(p);
if (o && u) {
if (q != false) {
while (o.lastChild) {
o.removeChild(o.lastChild)
}
}
t(o, u.documentElement)
}
};
this.processResponse = function (responseTxt) {
var result = eval(responseTxt);
for (var i = 0; i < result.length; i++) {
var cmd = result[i][0];
var id = result[i][1];
var property = result[i][2];
var data = result[i][3];
var objElement = this.$(id);
switch (cmd) {
case "as":
if (objElement) {
eval("objElement." + property + "= data ; ")
}
break;
case "al":
if (data) {
alert(data)
}
break;
case "ce":
this.create(id, property, data);
break;
case "rm":
this.remove(id);
break;
case "cs":
var scr = id + "(";
if (this.isArray(data)) {
scr += "(data[0])";
for (var l = 1; l < data.length; l++) {
scr += ",(data[" + l + "])"
}
} else {
scr += "data"
}
scr += ");";
eval(scr);
break;
default:
alert("Unknow command: " + cmd)
}
}
};
this.isArray = function (obj) {
if (obj) {
return obj.constructor == Array
}
return false
};
this.buildCall = function (comName, sFunction) {};
this.icall = function (comName, sFunction) {
var arg = "";
if (arguments.length > 2) {
for (var i = 2; i < arguments.length; i++) {
var a = arguments[i];
if (this.isArray(a)) {
arg += "arg" + i + "=" + this.stringify(a) + "&"
} else {
if (typeof a == "string") {
var t = new Array("_d_", encodeURIComponent(a));
arg += "arg" + i + "=" + this.stringify(t) + "&"
} else {
var t = new Array("_d_", encodeURIComponent(a));
arg += "arg" + i + "=" + this.stringify(t) + "&"
}
}
}
}
if (jax_site_type == "1.5") {
this.submitTask(comName, sFunction, arg)
} else {
this.submitITask(comName, sFunction, arg)
}
};
this.call = function (comName, sFunction) {
var arg = "";
if (arguments.length > 2) {
for (var i = 2; i < arguments.length; i++) {
var a = arguments[i];
if (this.isArray(a)) {
arg += "arg" + i + "=" + this.stringify(a) + "&"
} else {
if (typeof a == "string") {
a = a.replace(/"/g, """);
var t = new Array("_d_", encodeURIComponent(a));
arg += "arg" + i + "=" + this.stringify(t) + "&"
} else {
var t = new Array("_d_", encodeURIComponent(a));
arg += "arg" + i + "=" + this.stringify(t) + "&"
}
}
}
}
this.submitTask(comName, sFunction, arg)
};
this.create = function (sParentId, sTag, sId) {
var objParent = this.$(sParentId);
objElement = document.createElement(sTag);
objElement.setAttribute("id", sId);
if (objParent) {
objParent.appendChild(objElement)
}
};
this.remove = function (sId) {
objElement = this.$(sId);
if (objElement && objElement.parentNode && objElement.parentNode.removeChild) {
objElement.parentNode.removeChild(objElement)
}
};
this.getFormValues = function (frm) {
var objForm;
objForm = this.$(frm);
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function (elt) {
var len = this.length;
var from = Number(arguments[1]) || 0;
from = (from < 0) ? Math.ceil(from) : Math.floor(from);
if (from < 0) {
from += len
}
for (; from < len; from++) {
if (from in this && this[from] === elt) {
return from
}
}
return -1
}
}
var postData = new Array();
if (objForm && objForm.tagName == "FORM") {
var formElements = objForm.elements;
var assCheckbox = new Array();
var assCntIdx = 0;
var arrayHiddenValues = new Array();
var arrayHiddenCount = 0;
if (formElements.length > 0) {
for (var i = 0; i < formElements.length; i++) {
if (!formElements[i].name) {
continue
}
if (formElements[i].type && (formElements[i].type == "radio" || formElements[i].type == "checkbox") && formElements[i].checked == false) {
continue
}
var name = formElements[i].name;
if (name) {
if (formElements[i].type == "select-multiple") {
postData[i] = new Array();
for (var j = 0; j < formElements[i].length; j++) {
if (formElements[i].options[j].selected === true) {
var value = formElements[i].options[j].value;
postData[i][j] = new Array(name, encodeURIComponent(value))
}
}
} else {
if (formElements[i].type == "checkbox") {
if (assCheckbox.indexOf(formElements[i].name) == -1) {
assCheckbox[assCntIdx] = formElements[i].name;
assCntIdx++
}
} else {
if (formElements[i].type == "hidden") {
if (arrayHiddenValues.indexOf(formElements[i].name) == -1) {
arrayHiddenValues[arrayHiddenCount] = formElements[i].name;
arrayHiddenCount++
}
} else {
var value = formElements[i].value;
value = value.replace(/"/g, """);
postData[i] = new Array(name, encodeURIComponent(value))
}
}
}
}
}
}
if (arrayHiddenValues.length > 0) {
for (var i = 0; i < arrayHiddenValues.length; i++) {
var hiddenElement = document.getElementsByName(arrayHiddenValues[i]);
if (hiddenElement) {
if (hiddenElement.length > 1) {
var curLen = postData.length;
postData[curLen] = new Array();
for (var j = 0; j < hiddenElement.length; j++) {
var value = hiddenElement[j].value;
value = value.replace(/"/g, """);
postData[curLen][j] = new Array(arrayHiddenValues[i], encodeURIComponent(value))
}
} else {
var value = hiddenElement[0].value;
value = value.replace(/"/g, """);
postData[postData.length] = new Array(arrayHiddenValues[i], encodeURIComponent(value))
}
}
}
}
if (assCheckbox.length > 0) {
for (var i = 0; i < assCheckbox.length; i++) {
var objCheckbox = document.getElementsByName(assCheckbox[i]);
if (objCheckbox) {
if (objCheckbox.length > 1) {
var tmpIdx = 0;
var curLen = postData.length;
postData[curLen] = new Array();
for (var j = 0; j < objCheckbox.length; j++) {
if (objCheckbox[j].checked) {
var value = objCheckbox[j].value;
value = value.replace(/"/g, """);
postData[curLen][j] = new Array(assCheckbox[i], encodeURIComponent(value));
tmpIdx++
}
}
} else {
if (objCheckbox[0].checked) {
var value = objCheckbox[0].value;
value = value.replace(/"/g, """);
postData[postData.length] = new Array(assCheckbox[i], encodeURIComponent(value))
}
}
}
}
}
}
return postData
}
}
function jax_iresponse() {
jax.processIResponse()
}
var jax = new Jax();
Please help me.
请帮我。
回答by alinn
I'm not sure anyone should read obfuscated, minified code, but i found this:
我不确定是否有人应该阅读混淆的、缩小的代码，但我发现了这一点：
**xmlhttp.onreadystatechange**=function(){
if(xmlhttp.readyState==4){
if(xmlhttp.status==200){
jax.doneLoadingFunction();
**jax.processResponse**(xmlhttp.responseText)}
else{}
}
};
Which returns a js error on line 1 :))
在第 1 行返回一个 js 错误:))
Are you allowed to use ** with variable names in js?
你允许在 js 中使用带有变量名的 ** 吗？
回答by alinn
check if your bug is not here line 296
检查您的错误是否不在第 296 行
var result = eval(responseTxt);
What are you getting as a response? is it html, json? Check also for notices in your backend script, You can check this with the console/inspector in chrome (f12) , network tab.
你得到什么作为回应？是 html 还是 json？还要检查后端脚本中的通知，您可以使用 chrome (f12) 网络选项卡中的控制台/检查器进行检查。
It could be even be a debug output/notice/error from your backend script.
它甚至可能是来自后端脚本的调试输出/通知/错误。
If you open it with firefox, i think firebug shows you a JSON tab if your response is in correct json format.
如果你用 firefox 打开它，我认为如果你的响应是正确的 json 格式，firebug 会向你显示一个 JSON 选项卡。
