 max-age attribute not working, How do you make a cookie expire? |
| jmrathbun |
 Jun 29 2011, 09:02 PM
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#1
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Newbie  Group: Members Posts: 15 Joined: 8-June 11 Member No.: 14,726  |
I'm trying to set a cookie that will expire in 24 hours. I've tried
CODE Set-Cookie: score=10; path=/; expires=time()+86400 and I've tried CODE Set-Cookie: score=10; path=/; max-age=86400 both on Unix and on Windows servers, but in every case I get a session cookie only. What's wrong? |
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| Darin McGrew |
Jun 30 2011, 02:24 PM
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#2
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WDG Member Group: Root Admin Posts: 7,869 Joined: 4-August 06 From: Mountain View, CA Member No.: 3 |
The expires=... value should be a date/time value, for example:
expires=Thu, 30-Jun-2012 20:23:38 GMT Something needs to process the "time()+86400" value and convert that into a date/time value in the above format. That isn't happening. -------------------- Darin McGrew
WDG Member since 1998 |
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| jmrathbun |
Jun 30 2011, 04:01 PM
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#3
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Newbie Group: Members Posts: 15 Joined: 8-June 11 Member No.: 14,726 |
QUOTE(Darin McGrew @ Jun 30 2011, 03:24 PM)  The expires=... value should be a date/time value, for example: expires=Thu, 30-Jun-2012 20:23:38 GMT Something needs to process the "time()+86400" value and convert that into a date/time value in the above format. That isn't happening. According to http://tools.ietf.org/html/rfc6265#section-4.1 QUOTE 4.1.2.2. The Max-Age Attribute The Max-Age attribute indicates the maximum lifetime of the cookie, represented as the number of seconds until the cookie expires. The user agent is not required to retain the cookie for the specified duration. In fact, user agents often evict cookies due to memory pressure or privacy concerns. NOTE: Some existing user agents do not support the Max-Age attribute. User agents that do not support the Max-Age attribute ignore the attribute. If a cookie has both the Max-Age and the Expires attribute, the Max- Age attribute has precedence and controls the expiration date of the cookie. If a cookie has neither the Max-Age nor the Expires attribute, the user agent will retain the cookie until "the current session is over" (as defined by the user agent). So maybe my Firefox is one of those browsers that ignores the max-age attribute. As far as the expires= tag, I gather that's deprecated and I have seen multiple conflicting ideas on how to use it. I decided to rewrite my script using CGI to manage the whole cookie business, and what I got was similar to what you recommend. Now I just have to figure out how to get it to write multiple cookies or else a single cookie containing a hash (which I then have to parse in my script that reads and uses the cookie.) Ugh! |
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| jmrathbun |
Jun 30 2011, 04:23 PM
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#4
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Newbie Group: Members Posts: 15 Joined: 8-June 11 Member No.: 14,726 |
OK, I think I got it! Here's a working script:
CODE #!/usr/local/bin/perl use warnings; use strict; use CGI; my $cgi=new CGI; use diagnostics; my $c_topic = $cgi->cookie(-name=>'topic',-value=>'Consciousness',-expires=>'+1d',-path=>'/'); my $c_score = $cgi->cookie(-name=>'score',-value=>'10',-expires=>'+1d',-path=>'/'); my $c_smarts = $cgi->cookie(-name=>'smarts',-value=>'20',-expires=>'+1d',-path=>'/'); my $c_playlevel = $cgi->cookie(-name=>'playlevel',-value=>'30',-expires=>'+1d',-path=>'/'); print "Set-Cookie: $c_topic\n"; print "Set-Cookie: $c_score\n"; print "Set-Cookie: $c_smarts\n"; print "Set-Cookie: $c_playlevel\n"; print $cgi->header; print $cgi->start_html('Set Cookie'); print $cgi->h1('The cookie has been set!'); print $cgi->end_html; And the output is: CODE Set-Cookie: topic=Consciousness; path=/; expires=Fri, 01-Jul-2011 21:14:11 GMT Set-Cookie: score=10; path=/; expires=Fri, 01-Jul-2011 21:14:11 GMT Set-Cookie: smarts=20; path=/; expires=Fri, 01-Jul-2011 21:14:11 GMT Set-Cookie: playlevel=30; path=/; expires=Fri, 01-Jul-2011 21:14:11 GMT Content-Type: text/html; charset=ISO-8859-1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-US"> <head> <title>Set Cookie</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> </head> <body> <h1>The cookie has been set!</h1> </body> </html> Thanks to all who tried to help. I only do this because it's so much fun! |
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Posts in this topic
jmrathbun max-age attribute not working Jun 29 2011, 09:02 PM
Christian J That looks like a HTTP response, so I move the thr... Jun 30 2011, 05:30 AM
jmrathbun
That looks like a HTTP response, so I move the th... Jun 30 2011, 06:35 AM Christian J
[quote name='Christian J' post='59898' date='Jun ... Jun 30 2011, 10:05 AM jmrathbun Sorry to be so unclear. According to various onlin... Jun 30 2011, 11:59 AM Darin McGrew No, that is incorrect. That code might go at the t... Jun 30 2011, 12:12 PM jmrathbun Try testing my code, if you will. I've done it... Jun 30 2011, 12:35 PM |
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