CODEWITHSUNDEEP
regexapache.htaccesscachingservice-worker
BernardA
BernardA

Reputation: 1523

htacces target specific file

This should be straight forward but apparently not.

I am trying to avoid a service-worker file from being cached on a Apache server.

The file is sw.js and its placed on /public_html/, as it should.

I have tried several combinations of the <FilesMatch ??? > below, like "sw\.js$" without success.

<FilesMatch "^(sw\.js)$">
  FileETag None
  <ifModule mod_headers.c>
    Header unset ETag
    Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate"
    Header set Pragma "no-cache"
    Header set Expires "Wed, 08 Jan 1975 05:00:00 GMT"
  </ifModule>
</FilesMatch>

According to this ,if I run 

 `curl -I -L https://www.soeezauto.com/sw.js | grep cache-control`

I should receive a cache-control: no-cache, but I do not.

Upvotes: 2

Views: 144

Answers (1)

anubhava
anubhava

Reputation: 785146

Your regex inside FilesMatch directive appears correct. However do note that Apache will send following header in response:

Cache-Control: max-age=0, no-cache, no-store, must-revalidate

Notice mixed case header name here Cache-Control.

Your grep command is searching for all lowercase header name i.e. cache-control, hence no output is showing.

You need to use -i (ignore case) matching in grep or search for exact same header i.e. Cache-Control.

So any of the following grep will work:

grep -i 'cache-control'

or 

grep 'Cache-Control'

For better efficiency add -F option for fixed string search since you're not using any regex in grep pattern to make it:

grep -iF 'cache-control'

Upvotes: 2

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