Caching Facebook Query Parameters/Strings with Nginx

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Originally published at: Caching Facebook Query Parameters/Strings with Nginx - Managing WP

Introduction When someone shares a link on Facebook, the link they click includes an extra query string, like the following. Nginx Error: setrlimit(RLIMIT_NOFILE, 25562325) failed (1: Operation not permitted) - Managing WP This is problematic because common Nginx configurations will not cache URLs with a query string, and it’s even worse when a site is using WordPress, as these queries will result in a dynamic request.…

2

Hey!

Step 2 is missing semicolon.

# #
# GridPane vHost FastCGI caching per site include
# Version 1.2.0
# #


# fbutm: If fbclid is in url, set $cache_uri to $path_uri and set $skip_reason, also update fastcgi_cache_key
if ($args ~* "(utm_|gclid|fbclid|utm|gad_source)" ) {
    set $cache_uri $path_uri;
    # set $skip_reason "${skip_reason}-fbutm-${cache_uri}-${uri}"; # Used for debugging
    set $skip_reason "${skip_reason}-fbutm";
}

#fastcgi_cache_key "$scheme$request_method$geoip2_data_country_code$host$request_uri";
fastcgi_cache_key "$scheme$request_method$host$cache_uri";
fastcgi_cache_valid 200 300s;

Step 4

Space in the file name/location - should be /etc/nginx/extra.d/fbutm-skip-fcgi-cache-context.conf

And later a parenthesis

# fbutm: If we see fbclid in $args, don't skip cache and set skip reason
if ($args ~* "(utm_|gclid|fbclid|utm|gad_source)" ) {
    set $skip_cache 0;
    #set $skip_reason "${skip_reason}-fbutm-${cache_uri}"; # For debugging
    set $skip_reason "${skip_reason}-fbutm";
}
# if you have queries that shouldn't be cached
if ($args ~* "(listing_type|product_color)") {
    set $skip_cache 1;
    set $skip_reason "-querystring-fbutm-bypass";
}

And still in the end it did not work for me at all :joy:

Random string on fbclid always gave me miss and later a hit. Since it’s random all the time I gave up :smiling_face_with_tear:

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