Set up CORS on Cloud Files

If content in your Cloud Files account isn't loading on your website, it might
be due to Cross-Origin Resource Sharing (CORS), a security feature designed to
prevent malicious content from loading in a web page by default. If your files
load Asynchronous JavaScript and XML (AJAX) or embed fonts, CORS might prevent them from loading.

You can correct this issue by using the following steps to change the headers
in your Cloud Files with cURL (replacing XXXXX with your endpoint and
YYYYY with your token):

1. Set the X-Container-Meta-Access-Control-Allow-Origin header on a
   container named mycontainer by running the following command:

   $ curl -i -X POST https://storage101.lon3.clouddrive.com/v1/MossoCloudFS_XXXXX/mycontainer/ -H "X-Auth-Token: YYYYY" -H "X-Container-Meta-Access-Control-Allow-Origin: *"
   

2. Check mycontainer by running the following command:

   $ curl -I -X HEAD https://storage101.lon3.clouddrive.com/v1/MossoCloudFS_XXXXX/mycontainer/ -H "X-Auth-Token: YYYYY"

3. Upload a file named cup.jpg to the container with the required headers by
   running the following command:

   $ curl -v -H 'X-Auth-Token: YYYYY' -X PUT -T cup.jpg -H 'Content-Type: image/jpeg' -H 'Content-Length: 0' -H 'Access-Control-Expose-Headers: Access-Control-Allow-Origin' -H 'Access-Control-Allow-Origin: *' https://storage101.lon3.clouddrive.com/v1/MossoCloudFS_XXXXX/mycontainer/cup.jpg
   

4. Check the cup.jpg object by running the following command:

   $ curl -I -X HEAD https://storage101.lon3.clouddrive.com/v1/MossoCloudFS_XXXXX/mycontainer/cup.jpg -H "X-Auth-Token: YYYYY"
   

   The output should be similar to the following example:

   HTTP/1.1 200 OK
   Content-Length: 0
   Access-Control-Expose-Headers: Access-Control-Allow-Origin
   Accept-Ranges: bytes
   Last-Modified: Mon, 16 Jun 2014 17:01:20 GMT
   Etag: d23wqfqe300b204e9800998ecf8427e
   X-Timestamp: 8079.74691
   Access-Control-Allow-Origin: *
   Content-Type: image/jpeg
   X-Trans-Id: 2355eb60sdf323c82919-00539f22f8lon3
   Date: Mon, 16 Jun 2014 17:01:45 GMT