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I am trying to login with ajax to an API and I get this error:
XMLHttpRequest cannot load. The 'Access-Control-Allow-Origin' header has a value that is not equal to the supplied origin. Origin 'http://localhost' is therefore not allowed access.
I read all about this error, all over the internet, and I've tried all the solutions I could find online. I modified the .htaccess and apache httpd configuration file according to the CORS instructions here: http://enable-cors.org/server_apache.html
Access-Control-Allow-Origin: *
Nothing seems to be working. I'd really appreciate if you guys can help me out with this. Thank you!
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The specification of Access-Control-Allow-Origin allows for multiple origins, or the value null , or the wildcard * . However, no browser supports multiple origins and there are restrictions on the use of the wildcard * .
Access-Control-Allow-Origin is a CORS (cross-origin resource sharing) header. When Site A tries to fetch content from Site B, Site B can send an Access-Control-Allow-Origin response header to tell the browser that the content of this page is accessible to certain origins.
Configure the CloudFront distribution's cache behavior to allow the OPTIONS method for HTTP requests. If you still see errors after updating your CORS policy and forwarding the appropriate headers, allow the OPTIONS HTTP method in your distribution's cache behavior.
So, What is This Error Then? This error occurs when a script on your website/web app attempts to make a request to a resource that isn't configured to accept requests coming from code that doesn't come from the same (sub)domain, thus violating the Same-Origin policy.
You have to set Access-Control-Allow-Origin header to * or specified value http://localhost
You can do this through:
1- Your code
2- .htaccess file
3- Server config (restart web server required)
Here is the link that show how to do it on apache
http://access-control-allow-origin-guide.com/enable-cors-on-apache-linux/
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