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user706420
Asked: 2021-06-29 00:49:44 +0800 CST

RewriteRule with flag [L] stopping caching?

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I use server management software plesk with apache and nginx. I set in apache and nginx a expired header for javascript files for one year. That's working. I can see one year for "expires" in header.

Now I want access javascript and php files with a rewrite (without redirect).

APACHE

ExpiresActive On
ExpiresByType text/javascript A31556952

RewriteEngine On
RewriteRule fake/(.+\.(?:js|php))$ original/$1 [L]

NGINX

location ~* ^/(.*\.js)$ {
    try_files $uri @fallback;

    expires 1y;
    add_header Cache-Control "public";
}

That RewriteRule is working. I can access this files, but the "expires" header in "fake/file.js" is gone. What am I doing wrong?

example.com/original/file.js = expires in one year

example.com/fake/file.js = no header for expires

SOLUTION All static files are normally processing by NGINX, not apache. So set in apache this line for javascript give it a cache.

Header set Cache-Control "max-age=31556952, public"

Flag [L] in RewriteRule must stop static files processing by nginx and ExpiresByType is ignored.

mod-rewrite http-caching

1 Answers

  1. Best Answer

    why static files its not processing by nginx at all?

    Because /fake/file.js is no longer a "static file" (it doesn't exist), so is passed through to Apache, where it is internally rewritten to get the required response.

    ExpiresByType text/javascript A31556952

    text/javascript may not be the "correct" mime-type for JavaScript responses on your server. You need to confirm what mime-type (ie. Content-Type header) your server is sending back with these responses, but this would normally be application/javascript instead these days. In other words:

    ExpiresByType application/javascript A31556952

    To clarify, mod_expires ExpiresByType sets both the Expires and Cache-Control: max-age HTTP response headers. Cache-Control: max-age takes priority on all modern browsers. Expires is really only for legacy support.

    Flag [L] in RewriteRule must stop static files processing by nginx

    The L flag simply stops the current pass of the rewrite engine on Apache. These directives themselves do not influence Nginx (which would seem to be acting as a front-end proxy).

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