AJAX postSync not allowing partial-response redirect?

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#1

I am using encountering an issue where the DHTMLX Ajax postSync doesn’t seem to allow the Browser to handle a partial-response redirect as expected.
Response:

<?xml version="1.0" encoding="UTF-8"?>

Error seen:
unterminated regular expression literal
…machine:3333/CD/login/’></partial-response
--------------------------------------------------^

Is there something I can do to format the response so it can pass through correctly?

JavaScript Ajax call:
configLoader = dhtmlxAjax.postSync("/CD/setDbBackupConfig",configParams);
tempResult = eval(’(’ + configLoader.xmlDoc.responseText + ‘)’);

Java code intercepts this request and forces the redirect response:
…
if(isAJAX) {

                    String url = MessageFormat.format(
                    "{0}://{1}:{2,number,####0}{3}/login/",
                    request.getScheme(), request.getServerName(),
                    request.getServerPort(),
                            httpServletRequest.getContextPath());

                    PrintWriter pw = response.getWriter();
                    pw.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
                    pw.println("<partial-response><redirect url=\'" + url + "\'></redirect></partial-response>");
                    pw.flush();

                }

…

Context as to why I am doing this:
My application uses Spring security 3.0. That security redirects the user to a timeout page is the session has expired. BUT out-of-the-box it simply returns the entire HTML timeout page to any AJAX requests that happen once the session has expired - certainly not what the AJAX call expects. Our desired way to handle this is server side - So, I have added a filter to this security filter chain that intercepts the request, checks to see if it is AJAX, and is attempting to respond with a redirect response that gets the user to the timeout page. Everything seems to be working with the exception of the client interpretation of the redirect.

#2

The problem is in the next line

tempResult = eval(’(’ + configLoader.xmlDoc.responseText + ‘)’);

it assumes that server side will be a json string, but in your case it is an xml string, so it throws an error when parsed as json ( eval command )

#3

thank you - just losing my mind on this one. Document.location= ‘url’ make things much happier!