CORS header ‘Access-Control-Allow-Origin’ missing – Primer

CORS setting is necessary if you have traffic coming from different domain. This is one of the security that you can put for disallow connection. However, you have need for allowing various domain to be able to access your service.

<IfModule mod_headers.c>
    SetEnvIf Origin "http(s)?://(www\.)?(||$" AccessControlAllowOrigin=$0$1
    Header add Access-Control-Allow-Origin %{AccessControlAllowOrigin}e env=AccessControlAllowOrigin
    Header set Access-Control-Allow-Credentials true
SetEnvIf Origin "^http(s)?://(.+\.)?(domain\.org|domain2\.com)$" origin_is=$0 
Header always set Access-Control-Allow-Origin %{origin_is}e env=origin_is
# Enable cross domain access control
SetEnvIf Origin "^http(s)?://(.+\.)?(domain1\.com|domain2\.org|domain3\.net)$" REQUEST_ORIGIN=$0
Header always set Access-Control-Allow-Origin %{REQUEST_ORIGIN}e env=REQUEST_ORIGIN
Header always set Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS"
Header always set Access-Control-Allow-Headers "x-test-header, Origin, X-Requested-With, Content-Type, Accept"

# Force to request 200 for options
RewriteEngine On
RewriteRule .* / [R=200,L]