Exception in chatting application in Firefox

[kpranjan1]

i am getting exception like this---
1.
[Exception... "Component returned failure code: 0x804b000f [nsIXMLHttpReque st.setRequestHe ader]" nsresult: "0x804b000f (<unknown>)" location: "JS frame :: http://localhost:8080/supportnow/jsLibrary/Ajax.js :: getChatText :: line 149" data: no]
[Break on this error] receiveReq.setR equestHeader('C ontent-Type','applicat ion/x-www-form-urlencoded')...

my application is working fine in IE 6.0 but fails in FF2.0.

sometimes Firefox browser abnormally teminated, so i have to restart my pc.

my application is used for chatting

[acoder]

Please remember to provide a meaningful Title for any threads started (Please Use Appropriate Titles for New Threads!).

This helps to ensure that other members, and also the general public, will have a better chance of finding answers to any similar questions.

MODERATOR.

[acoder]

i am getting exception like this---
1.
[Exception... "Component returned failure code: 0x804b000f [nsIXMLHttpReque st.setRequestHe ader]" nsresult: "0x804b000f (<unknown>)" location: "JS frame :: http://localhost:8080/supportnow/jsLibrary/Ajax.js :: getChatText :: line 149" data: no]
[Break on this error] receiveReq.setR equestHeader('C ontent-Type','applicat ion/x-www-form-urlencoded')...

my application is working fine in IE 6.0 but fails in FF2.0.

sometimes Firefox browser abnormally teminated, so i have to restart my pc.

my application is used for chatting

Welcome to TSDN!

Can you post some of your code (using code tags please).

[kpranjan1]

These are some lines of code-

function getChatText() {
receiveReq.open ("POST", getUrl ,true);
receiveReq.setR equestHeader('C ontent-Type','applicat ion/x-www-form-urlencoded');
receiveReq.onre adystatechange = handleGetChat;
var queryString=Ope ratorDept.getPa rameterString() ;
var queryParmaSt=qu eryString+"&opt yping="+opTypin g+"&messageReci ver="+escape(me ssageReciver);
receiveReq.send (queryParmaSt);
}
//Function for handling the return of chat text
function handleGetChat() {
try{
if (receiveReq.rea dyState == 4) {
if ((receiveReq.st atus == 200)||(receiveR eq.status == 0)) {
var chat_div = document.getEle mentById("div_c hat");
var lastMessage;
var chat_typing=doc ument.getElemen tById("div_typi ng");
var oroot = receiveReq.resp onseXML.getElem entsByTagName(" root");
var messageObj = receiveReq.resp onseXML.getElem entsByTagName(" message");
var sessionOut = receiveReq.resp onseXML.getElem entsByTagName(" sessionexpired" );
//this will return an object specify that whether a party is typing or not
var typingStatus= receiveReq.resp onseXML.getElem entsByTagName(" typing");
//alert(sessionOu t.length);
//redirecting the page if the session is out
if(sessionOut.l ength>0){
//alert(sessionOu t.length);
alert("inside ajax.js ");
location.href=" SessionExp.htm" ;
}

//execute the typing status
chat_typing.inn erHTML="";
if(typingStatus .length!=0){
for(var j=0;j< typingStatus.le ngth;j++){
var oppTyping=typin gStatus[j].childNodes[0].firstChild.nod eValue;
if(oppTyping==m essageReciver){
var oppName=chatUse rList.getUserNi ckName(oppTypin g);
chat_typing.inn erHTML="<img src='Images/typing.gif' >"+oppName+" is typing a message";
}//end if
}//end for
}//end if typing status.length
var n_messages = messageObj.leng th;
msgString="";
if(n_messages!= 0){
for (var i = 0; i < n_messages; i++) {
var messageID=messa geObj[i].childNodes[0].firstChild.nod eValue;
var msgChatRoom=mes sageObj[i].childNodes[8].firstChild.nod eValue;
OperatorDept.se tDeptMessageID( msgChatRoom,mes sageID);
var postedTime=mess ageObj[i].childNodes[1].firstChild.nod eValue;
var sender=messageO bj[i].childNodes[2].firstChild.nod eValue;
var senderName=mess ageObj[i].childNodes[3].firstChild.nod eValue;
var reciver=message Obj[i].childNodes[4].firstChild.nod eValue;
var recName=message Obj[i].childNodes[5].firstChild.nod eValue;
//alert(reciverNa me);
var msgText=decodeU RIComponent(mes sageObj[i].childNodes[6].firstChild.nod eValue);
//alert(msgText);
var msgtype=message Obj[i].childNodes[7].firstChild.nod eValue;

//Let this function to handle, store and display each message
chatMessageHand ler(messageID,s ender,senderNam e,reciver,recNa me,msgText,msgt ype,msgChatRoom );
//alert(messageID +sender+reciver +msgText+msgtyp e+msgChatRoom);
}//End for loop
chat_div.innerH TML+=msgString;
chat_div.scroll Top = 1000000;
}//End if(n_messages

}
mTimer = setTimeout('get ChatText();',20 00);

}
}catch(e){
alert(e);

}
}

[acoder]

See an example of a POST request. Are you sure the response is valid XML?

[kpranjan1]

See an example of a POST request. Are you sure the response is valid XML?

Yeah my response is valid XML. it is working fine on Opera , IE 7 as well as Safari browser.

<?xml version=\"1.0\" ?> this is the first line of dynamic generated XML.

is it ok ? .

actually i am new to developement field. and currently i am working on Maintenance project.


thanks

[acoder]

Try adding the following:
[CODE=javascript]if (receiveReq.ove rrideMimeType) {
receiveReq.over rideMimeType('t ext/xml');
}[/CODE]

[kpranjan1]

Try adding the following:
[CODE=javascript]if (receiveReq.ove rrideMimeType) {
receiveReq.over rideMimeType('t ext/xml');
}[/CODE]

Sorry for late reply, but i was on leave.
I have already tryed above line but getting same error.