Ajax request fails in JBOSS EAP 7.1 in Java EAR application - ajax

Question

I've EAR applications which run fine in JBOSS EAP 6.3. When I run this application in EAP 7, then ajax call response is empty after few call. Mainly jsp page calls servlet using ajax. I use common code snippet for AJAX call. I can get response properly first 3/4 times. After that it is not working. The whole thing is working fine in EAP 6.3.
The ajax code snippet is as follows:
try{
objXMLHTTP = new XMLHttpRequest();
}catch(e){
try {
objXMLHTTP = new ActiveXObject("MSXML2.XMLHTTP.3.0");
}
catch(e){
try {
objXMLHTTP = new ActiveXObject("MSXML2.XMLHTTP");
}
catch(e) {
try {
objXMLHTTP = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e) {
alert("XMLHTTP Not Supported On Your Browser");
return;
}
}
}
}
var urlstr = "" ;
var key = "";
var j = 0;
//dataStore is an array of key/value pair.
for(key in dataStore){
if(j == 0) {
urlstr += key + "=" + dataStore[key];
j = 1;
} else {
urlstr += "&" + key + "=" + dataStore[key];
}
}
var _dateTime = new Date().getTime();
urlstr += "&CALLTIME=" + _dateTime + "-";
var requNumber = "?requNumber=" + _dateTime;
// http request has been changed as Parameterised
var _AsyncRequest = true;
try{
if(_httpMode == "undefined")
_httpMode = "0";
}catch(e){
_httpMode = "0";
}
if((_httpMode != "undefined") && (_httpMode != null) && (_httpMode == "1"))
{
_AsyncRequest = false;
}
if(!document.all)
{
_AsyncRequest = false;
}
if(urlstr.length<=1000) {
objXMLHTTP.open("POST","XMLDHTTPServlet" + requNumber + "&" + urlstr,false);
} else {
objXMLHTTP.open("POST","XMLDHTTPServlet" + requNumber,false);
}
urlstr = URLEncode(urlstr);
objXMLHTTP.setRequestHeader("content-type", "application/x-www-form-urlencoded") ;
//The following is not working after few calls
if(urlstr.length<=1000) {
objXMLHTTP.send("");
} else {
objXMLHTTP.send(urlstr);
}
rtnXML = objXMLHTTP.responseText;
if (objXMLHTTP.statusText == "OK" )
// This condition fails after successive requests
{
//Code
}
Following is in JSP page to call the AJAX. Most importantly, when I put the character **|**, then response in empty and objXMLHTTP.statusText shows Bad Request in EAP 7. But EAP 6, it is working fine.
var objXMLApplet = new xmlHTTPValidator();
objXMLApplet.clearMap();
objXMLApplet.setValue("Package", "panaceaFLweb.getMenuInfo.ReadInfo");
objXMLApplet.setValue("ValidateToken","true");
objXMLApplet.setValue("Method", "chkEODStatus");
objXMLApplet.setValue("BRNCH_CODE",BranCode);
objXMLApplet.setValue("CURR_BUSS_DATE",CBD);
objXMLApplet.setValue("DataTypes","S|S");
objXMLApplet.sendAndReceive();

Answer 1

It is because character | present in URL post request and didn't encode the string which length is less than 1000. Just use
urlstr = URLEncode(urlstr);
before if/else condition of connection open.
Code snippet are as follows:
urlstr = URLEncode(urlstr);
if(urlstr.length<=1000) {
objXMLHTTP.open("POST","XMLDHTTPServlet" + requNumber + "&" + urlstr,false);
} else {
objXMLHTTP.open("POST","XMLDHTTPServlet" + requNumber,false);
}
objXMLHTTP.setRequestHeader("content-type", "application/x-www-form-urlencoded") ;
if(urlstr.length<=1000) {
objXMLHTTP.send("");
} else {
objXMLHTTP.send(urlstr);
}
rtnXML = objXMLHTTP.responseText;
And URLEncode function definition are as follows:
function URLEncode(urlstr ){
var SAFECHARS = "0123456789" + "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "abcdefghijklmnopqrstuvwxyz" + "-_.!~*'()=?&";
var HEX = "0123456789ABCDEF";
var plaintext = urlstr;
var encoded = "";
for (var i = 0; i < plaintext.length; i++ ) {
var ch = plaintext.charAt(i);
if (ch == " "){
encoded += "+";
}else if (SAFECHARS.indexOf(ch) != -1) {
encoded += ch;
}else {
var charCode = ch.charCodeAt(0);
if (charCode > 255) {
encoded += "+";
}else {
encoded += "%";
encoded += HEX.charAt((charCode >> 4) & 0xF);
encoded += HEX.charAt(charCode & 0xF);
}
}
}
return encoded;
}