Cross-Origin Resource Sharing (CORS) is the process, which tells the web browsers to allows resources running form different origins (domain, protocol, or port) via HTTP headers. This tutorial will help you to enable CORS in the Apache webserver.
Prerequsities
You must have enabled Apache headers modules. The Redhat based have default enabled headers modules. For the Ubuntu and Debian, based systems execute the following command to enable headers modules.
a2enmod headers
Enable CORS in Apache
Set Access-Control-Allow-Origin (CORS) authorization to the header in Apache web server. Add the following line inside either the <Directory>, <Location>, <Files> sections under <VirtualHost> in Apache configuration files. You can also place this inside the .htaccess file.
Header set Access-Control-Allow-Origin "*"
Example
To allow Access-Control-Allow-Origin (CORS) authorization for all origin domains for all files inside a directory.
1 2 3 4 5 | <Directory "/path/to/dir"> <IfModule mod_headers.c> Header set Access-Control-Allow-Origin "*" </IfModule> </Directory> |
To allow Access-Control-Allow-Origin (CORS) authorization for specific files only. For example to allow CORS for fonts only use following example:
1 2 3 4 5 | <FilesMatch "\.(ttf|otf|eot|woff)$"> <IfModule mod_headers.c> Header Set Access-Control-Allow-Origin "*" </IfModule> </FilesMatch> |
To allow Access-Control-Allow-Origin (CORS) with multiple origin domains, Use following example
1 2 3 4 5 6 | <FilesMatch "\.(ttf|otf|eot|woff)$"> <IfModule mod_headers.c> SetEnvIf Origin "http(s)?://(www\.)?(google.com|staging.google.com|development.google.com)$" AccessControlAllowOrigin=$0 Header add Access-Control-Allow-Origin %{AccessControlAllowOrigin}e env=AccessControlAllowOrigin </IfModule> </FilesMatch> |
After making changes in configuration files, You need to restart the Apache webserver. But no need to restart if adding in the .htaccess file.
1 Comment
Thanks for this – was having real issues serving an API to an angular SPI due to cross domain. Many solutions offer allow-origin “*” but this doesn’t work as angular sends credentials (can’t have allow-credentials with origin “*”)
One issue – for me the $0 argument is always null. I made a work around with multiple lines and hard coding each assignment, but your version is more elegant.
$0 looks like an parameter variable but I can’t find any information about using these in this context.
Could you help point me to where can I find out information about this?
Thanks