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POHow do I reconstruct the request cookie in varnish vcl?
 

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  1. POHow do I reconstruct the request cookie in varnish vcl?
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    <p>I am not sure if I am asking the right question. I have varnish sitting infront of a site that have access to numerous cookies. The most important are creds cookie. What I am doing is stripping all the cookies that I do not need and then check if any cookie left. If so, this means we bypass varnish, else return the cache object. </p> <pre><code> # Remove all cookies that Drupal doesn't need to know about. We explicitly # list the ones that Drupal does need, the SESS , NO_CACHE and credential cookie namely auth #. If, after running this code we find that either of these two cookies remains, we # will pass as the page cannot be cached. if (req.http.Cookie) { # 1. Append a semi-colon to the front of the cookie string. # 2. Remove all spaces that appear after semi-colons. # 3. Match the cookies we want to keep, adding the space we removed # previously back. (\1) is first matching group in the regsuball. # 4. Remove all other cookies, identifying them by the fact that they have # no space after the preceding semi-colon. # 5. Remove all spaces and semi-colons from the beginning and end of the # cookie string. set req.http.Cookie = ";" + req.http.Cookie; set req.http.Cookie = regsuball(req.http.Cookie, "; +", ";"); set req.http.Cookie = regsuball(req.http.Cookie, ";(SESS[a-z0-9]+|SSESS[a-z0-9]+|NO_CACHE+|auth)=", "; \1="); set req.http.Cookie = regsuball(req.http.Cookie, ";[^ ][^;]*", ""); set req.http.Cookie = regsuball(req.http.Cookie, "^[; ]+|[; ]+$", ""); if (req.http.Cookie == "") { # If there are no remaining cookies, remove the cookie header. If there # aren't any cookie headers, Varnish's default behavior will be to cache # the page. unset req.http.Cookie; } else { # If there is any cookies left (a session or NO_CACHE cookie), do not # cache the page. Pass it on to Apache directly. return (pass); } } } </code></pre> <p>This works fine. I get a cache miss when <code>auth</code> cookie is in there and a hit otherwise. However, even when it is a miss it seems that varnish pass the request without the rest of the cookies that came in the request. Is there a way to direct varnish to pass the original cooke? </p> <p>Maybe something like </p> <pre><code>else { # If there is any cookies left (a session or NO_CACHE cookie), do not # cache the page. Pass it on to Apache directly. # And set the cookie to its original form ?? return (pass); } </code></pre>
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