WP Super Cache: "try_files" aren't allowed in "if" blocks

Server NGINX
1

Hi there, hope you’re all well!

I’m trying to configure nginx for the Wordpress Super Cache plugin,
using the “Don’t cache pages for logged in users” option.

I have the following config which works well once the cached file has
been generated:

location ~ ^/my-blog(.*)$ {
    try_files $uri $uri/

/my-blog/wp-content/cache/supercache/$http_host/$uri/index.html
/my-blog/index.php;
}

but I don’t want to serve the cached file to logged-in users, which
according to the WPSC documentation can be found by checking the cookie
for “(comment_author_|wordpress|wp-postpass_)”.

The following snippet I found on this list doesn’t work with nginx
0.7.61 (and nothing I see in the 0.7.62 changelog appears relevant):

location ~ ^/my-blog(.*)$ {
    if ($http_cookie ~* "comment_author_|wordpress|wp-postpass_") {
        try_files $uri $uri/ /my-blog/index.php;
        break; # BTW, would this be necessary if it did work?
    }
    try_files $uri $uri/

/my-blog/wp-content/cache/supercache/$http_host/$uri/index.html
/my-blog/index.php;
}

because apparently “try_files” is not allowed inside “if”:

[emerg]: "try_files" directive is not allowed here

So I tried this:

location ~ ^/my-blog(.*)$ {
    if ($http_cookie !~* "comment_author_|wordpress|wp-postpass_") {
        rewrite ^/my-blog/(.*)$

/my-blog/wp-content/cache/supercache/$http_host/my-blog/$1/index.html
break;
}
try_files $uri $uri/ /my-blog/index.php;
}

and that works fine once the cached file has been generated, but
obviously returns 404 beforehand.

I know I could just add

if ($http_cookie !~* "comment_author_|wordpress|wp-postpass_") {
    if(-e [cached file]) {
        rewrite …;
    }
}

but that would seem to defeat the object of using try_files to get away
from these if() constructions.

Is there a way to check cookie values more like a location test, or
even, or is there a better way to do what I’m trying to do?

Thanks for your help,
Igor C.

2

Hello!

On Thu, Sep 24, 2009 at 11:40:15PM +0200, Igor C. wrote:

/my-blog/wp-content/cache/supercache/$http_host/$uri/index.html
location ~ ^/my-blog(.*)$ {

    try_files $uri $uri/ /my-blog/index.php;
    }
}

but that would seem to defeat the object of using try_files to get away
from these if() constructions.

Is there a way to check cookie values more like a location test, or
even, or is there a better way to do what I’m trying to do?

Try something like this:

location /my-blog {
    if ($http_cookie ~ "comment_author_|wordpress|wp-postpass_") } {
        rewrite ^/my-blog(.*) /my-blog-loggedin$1 last;
    }

    # non logged in users

    try_files $uri $uri/
              /my-blog/wp-content/cache/supercache/$http_host/$uri/index.html
              /my-blog/index.php;
}

location /my-blog-loggedin {
    internal;
    rewrite ^/my-blog-loggedin(.*) /my-blog$1 break;
    try_files $uri $uri/ /my-blog/index.php;
}

Maxim D.

3

Maxim D. wrote:

Try something like this:

location /my-blog {
    if ($http_cookie ~ "comment_author_|wordpress|wp-postpass_") } {
        rewrite ^/my-blog(.*) /my-blog-loggedin$1 last;
    }

    # non logged in users

    try_files $uri $uri/
              /my-blog/wp-content/cache/supercache/$http_host/$uri/index.html
              /my-blog/index.php;
}

location /my-blog-loggedin {
    internal;
    rewrite ^/my-blog-loggedin(.*) /my-blog$1 break;
    try_files $uri $uri/ /my-blog/index.php;
}

Thank you Maxim, I think that’s what I’m looking for! Nice lateral
thinking.

Best
Igor