[.htaccess] Header set Access-Control-Allow-Origin in .htaccess doesn't work

I can't figure out why my .htaccess header settings doesn't work.

My .htaccess file content:

Header set Access-Control-Allow-Origin *
Header always set Access-Control-Allow-Methods "POST, GET, OPTIONS, DELETE, PUT"
Header always set Access-Control-Allow-Headers "*"
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ index.php [QSA,L]

But when I remove Header's and add them in index.php then everything works fine.

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: PUT, GET, POST, DELETE, OPTIONS");
header("Access-Control-Allow-Headers: *");

What am i missing?

I +1'd Miro's answer for the link to the header-checker site http://www.webconfs.com/http-header-check.php. It pops up an obnoxious ad every time you use it, but it is, nevertheless, very useful for verifying the presence of the Access-Control-Allow-Origin header.

I'm reading a .json file from the javascript on my web page. I found that adding the following to my .htaccess file fixed the problem when viewing my web page in IE 11 (version 11.447.14393.0):

<FilesMatch "\.(json)$">
  <IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin "*"
  </IfModule>
</FilesMatch>

I also added the following to /etc/httpd.conf (Apache's configuration file):

AllowOverride All

The header-checker site verified that the Access-Control-Allow-Origin header is now being sent (thanks, Miro!).

However, Firefox 50.0.2, Opera 41.0.2353.69, and Edge 38.14393.0.0 all fetch the file anyhow, even without the Access-Control-Allow-Origin header. (Note: they might be checking IP addresses, since the two domains I was using are both hosted on the same server, at the same IPv4 address.)

However, Chrome 54.0.2840.99 m (64-bit) ignores the Access-Control-Allow-Origin header and fails anyhow, erroneously reporting:

No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin '{mydomain}' is therefore not allowed access.

I think this has got to be some sort of "first." IE is working correctly; Chrome, Firefox, Opera and Edge are all buggy; and Chrome is the worst. Isn't that the exact opposite of the usual case?

I activated the Apache module headers a2enmod headers, and the issue has been solved.

try this:

<IfModule mod_headers.c>
     Header set Access-Control-Allow-Credentials true
     Header set Access-Control-Allow-Origin "your domain"
     Header set Access-Control-Allow-Headers "X-Requested-With"
</IfModule>

It's preferable to allow a list of know trusted host.

Be careful on:

 Header add Access-Control-Allow-Origin "*"

This is not judicious at all to grant access to everybody. It's preferable to allow a list of know trusted host only...

Header add Access-Control-Allow-Origin "http://aaa.example"
Header add Access-Control-Allow-Origin "http://bbb.example"
Header add Access-Control-Allow-Origin "http://ccc.example"

Regards,

Try this in the .htaccess of the external root folder

<IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin "*"
</IfModule>

Be careful on : Header add Access-Control-Allow-Origin "*" This is not judicious at all to grant access to everybody. I think you should user:

<IfModule mod_headers.c>
    Header set Access-Control-Allow-Origin "http://example.com"
</IfModule>

I have a shared hosting on GoDaddy. I needed an answer to this question, too, and after searching around I found that it is possible.

I wrote an .htaccess file, put it in the same folder as my action page. Here are the contents of the .htaccess file:

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"

Here is my ajax call:

    $.ajax({
        url: 'http://www.mydomain.com/myactionpagefolder/gbactionpage.php',  //server script to process data
        type: 'POST',
        xhr: function() {  // custom xhr
            myXhr = $.ajaxSettings.xhr();
            if(myXhr.upload){ // check if upload property exists
                myXhr.upload.addEventListener('progress',progressHandlingFunction, false); // for handling the progress of the upload
            }
            return myXhr;
        },
        //Ajax events
        beforeSend: beforeSendHandler,
        success: completeHandler,
        error: errorHandler,
        // Form data
        data: formData,
        //Options to tell JQuery not to process data or worry about content-type
        cache: false,
        contentType: false,
        processData: false
    });

See this article for reference:

Header set Access-Control-Allow-Origin in .htaccess doesn't work

If anyone else is trying this, the most upvoted answer should work. However, if you are having issues it could be possible the browser has cached the REQUEST. To confirm append a query string.

Just for the record, I was running into the exact same problem and none of the answers worked.

I used a headers checker tool: http://www.webconfs.com/http-header-check.php

I was testing with my IP (http://192.0.2.1/upload) and what came back was the following:

HTTP/1.1 301 Moved Permanently => 
Date => Sat, 10 Jan 2015 04:03:35 GMT
Server => Apache/2.2.21 (Win32) mod_ssl/2.2.21 OpenSSL/1.0.0e PHP/5.3.8 mod_perl/2.0.4 Perl/v5.10.1
Location => http://192.0.2.1/upload/
Content-Length => 380
Connection => close
Content-Type => text/html; charset=iso-8859-1

There was a redirection happening and the AJAX request does not honor/follow redirects.

It turned out to be the missing slash at the end of the domain (http://192.0.2.1/upload/)

I tested again with slash at the end and I got this below. Added a slash in the script too, and it was now working.

HTTP/1.1 200 OK => 
Date => Sat, 10 Jan 2015 04:03:53 GMT
Server => Apache/2.2.21 (Win32) mod_ssl/2.2.21 OpenSSL/1.0.0e PHP/5.3.8 mod_perl/2.0.4 Perl/v5.10.1
X-Powered-By => PHP/5.3.8
Access-Control-Allow-Origin => *
Access-Control-Allow-Methods => PUT, GET, POST, DELETE, OPTIONS
Access-Control-Allow-Headers => *
Content-Length => 1435
Connection => close
Content-Type => text/html

Use this tool to test if your headers are good and to troubleshoot what is happening.

This should work:

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"

After spending half a day with nothing working. Using a header check service though everything was working. The firewall at work was stripping them