Change Cookie expiry date - HTTP

Question

I need to change the expiry date of a Cookie that I occasionally set.

More precisely I would like to refresh the expiry date to +1 hour.

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This is how I set the cookie

Set-Cookie: test=123; Expires=Wed, 02 Feb 2011 12:00:00 GMT

Setting the cookie again adds another cookie with the same name :S

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Any ideas?

Answer 1

If the match is present and unique, this works to set expiration to end of session:

document.cookie="meteor_login_token="+/meteor_login_token=([^;]*)/.exec(document.cookie)[1]+";path=/"

Answer 2

You can only overwrite a cookie if you use the same parameters (i.e. Domain, Path, Secure, and HTTPOnly).

So to overwrite your current cookie, you need to set it from the same domain and path.