[opencms-dev] Unable To Set Cookies In Page Elements

[Stephan Hartmann]

Cookies require modification of response headers.
As per definition of the servlet spec, you cannot modify response headers
from within a servlet or JSP that is included with a request dispatcher (or
after there have been already written some bytes to the output stream).

You can only modify response headers in the most top servlet / JSP or if the
request is forwarded.

Regards,
Stephan


2010/2/10 Brett Sheeran <brett.sheeran at gmail.com>

> Hi,
>
> I find that code for setting cookies inside a page element does not
> succeed.
>
> Here is some simple code placed inside an element:
> -----
>     Cookie cookie = new Cookie ("ELEMENT_COOKIE", "value1");
>     cookie.setMaxAge(31536000);//secs in a year
>     cookie.setPath("/");
>     response.addCookie(cookie);
> -----
> There are no errors, but *definitely* no cookies either. I checked
> using both request.getCookies(); and the show cookies button in my
> Safari browser.
>
> However, the previous code *will* work if placed inside the template
> JSP that calls the page element.
>
> Furthermore, the Following code does not work in a page element either.
>     CmsRequestUtil.setCookieValue(cms, "ELEMENT_COOKIE2", "value2");
>
> Any suggestions?
>
> Thank you.
>
> Regards Brett Sheeran
>
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