How to add an Access-Control-Allow-Origin header

corsfont-faceheader

I am designing a website (e.g. mywebsite.com) and this site loads font-face fonts from another site (say anothersite.com). I was having problems with the font face font loading in Firefox and I read on this blog:

Firefox (which supports @font-face
from v3.5) does not allow cross-domain
fonts by default. This means the font
must be served up from the same domain
(and sub-domain) unless you can add an
“Access-Control-Allow-Origin” header
to the font.

How can I set the Access-Control-Allow-Origin header to the font?

Best Answer

So what you do is... In the font files folder put an htaccess file with the following in it.

<FilesMatch "\.(ttf|otf|eot|woff|woff2)$">
  <IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin "*"
  </IfModule>
</FilesMatch>

also in your remote CSS file, the font-face declaration needs the full absolute URL of the font-file (not needed in local CSS files):

e.g.

@font-face {
    font-family: 'LeagueGothicRegular';
    src: url('http://www.example.com/css/fonts/League_Gothic.eot?') format('eot'),
         url('http://www.example.com/css/fonts/League_Gothic.woff') format('woff'),
         url('http://www.example.com/css/fonts/League_Gothic.ttf') format('truetype'),
         url('http://www.example.com/css/fonts/League_Gothic.svg')

}

That will fix the issue. One thing to note is that you can specify exactly which domains should be allowed to access your font. In the above htaccess I have specified that everyone can access my font with "*" however you can limit it to:

A single URL:

Header set Access-Control-Allow-Origin http://example.com

Or a comma-delimited list of URLs

Access-Control-Allow-Origin: http://site1.com,http://site2.com

(Multiple values are not supported in current implementations)

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