AJAX error: No ‘Access-Control-Allow-Origin’ header is present on the request resource

If when you do with AJAX, you see the error like the figure below, you can follow those step to fix it.

XMLHttpRequest cannot load ... No 'Access-Control-Allow-Origin' header is present on the request resource. Origin ... is therefore not allowed access

ajax cross domain

Step 1: check if mod_headers is enable on Apache

/usr/lib/httpd/modules/ (Linux)
mod headers apache
D:\AppServ\Apache2.2\modules (Windows, ex)
windows mod headers

/etc/httpd/conf/httpd.conf (Linux)
headers_module httpd conf
D:\AppServ\Apache2.2\conf\httpd.conf (Windows, ex)
windows httpd conf

Step 2: Use file .htaccess

<ifModule mod_headers.c>
Header add Access-Control-Allow-Origin "*"
Header add Access-Control-Allow-Headers "origin, x-requested-with, content-type"
Header add Access-Control-Allow-Methods "PUT, GET, POST, DELETE, OPTIONS"

Upload this file to the working directory.
upload htaccess

Now, you can access cross domain. Check response header at this.

HTTP/1.1 200 OK => 
Date => Sun, 13 Sep 2015 08:18:39 GMT
Server => Apache/2.2.27 (CentOS)
Last-Modified => Sun, 13 Sep 2015 04:02:04 GMT
ETag => "3e40b2-47-51f990301fbc7"
Accept-Ranges => bytes
Content-Length => 71
Access-Control-Allow-Origin => *
Access-Control-Allow-Headers => origin, x-requested-with, content-type
Access-Control-Allow-Methods => PUT, GET, POST, DELETE, OPTIONS
Connection => close
Content-Type => text/plain; charset=UTF-8

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