342137 - XMLHttpRequest object return value points syntax error at JavaScript console and Firebug

Status: RESOLVED DUPLICATE of bug 311724

(Core :: XML, defect)

Description

[Fernando Wendt]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8.0.3) Gecko/20060426 Firefox/1.5.0.3

When using a XMLHttpRequest object in some JavaScript file - i.e AJAX -, the string returned by processing the data request is being marked at JavaScript console and Firebug with a sintax error.

Even when changing the response header to some other content type (as "text/plain", "text/html" or "text/xml"), it happens.

Reproducible: Always

Steps to Reproduce:
1. Create some AJAX resource, by using a XMLHttpRequest object ("http_request" at this sample) to post data for external processing (with some server side, like PHP or ASP).

2. Add the follow line codes at the main AJAX function:

a)http_request.onreadystatechange = somefunction;
b)http_request.open('POST', url, true);
c)http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
d)http_request.send(data);

3. Return some string at the external request processing file as result;

4. Do anything whith the string data (use a window.alert simple test);

5. Look at the JavaScript console and/or FireBug message error.
Actual Results:  
Sintax error is pointed at both JavaScript Console and FireBug.

Expected Results:  
None kind of error. It´s just string data.

Comment 1

[Phil Ringnalda (:philor)]

Well, it's not the error console's fault that someone's posting an error to it. If you only see it with Firebug installed, then it's a Firebugbug, and you should tell Hewitt about it, and if not, more detailed steps to reproduce, with maybe a testcase or example URL, would help.

Comment 2

[Dave Townsend [:mossop] (PTO until July 20)]

Also include the exact error displayed in the error console.

Comment 3

[Fernando Wendt]

OK, i have made one sample file, that show all the code above, and is a page test too. The URL bug field have been updated. Its http://www.fernandowendt.eti.br/bugzilla/

Enjoy.

Fernando

Comment 4

[Dave Townsend [:mossop] (PTO until July 20)]

http_request.overrideMimeType('text/xml') tells Firefox to attempt to parse the response as text/xml, whatever the server claims the response actually is. So this is just bug 311724.


*** This bug has been marked as a duplicate of 311724 ***