Parameter Description
Content-Type Specifies the content type of a client response object.
Cache-Control Specifies the caching method followed by client requests and responses.
Content-Disposition Specifies the default file name for activating the file download settings when the client responds to objects.
Content-Language Specifies the language for the client to respond to objects.
Expires Specifies the expiration time for the client to respond to objects.
Access-Control-Allow-Origin Specifies the sources of allowed cross-origin requests.
Access-Control-Allow-Methods Specifies the method of allowed cross-origin requests.
Access-Control-Max-Age Specifies the caching duration for the client program to return results for an origin fetch request for a specific resource.
Access-Control-Expose-Headers Specifies custom header information of allowed access.

You can set an HTTP response header. Currently, nine HTTP request header parameters are available for customization. The parameters are as follows:

Restrictions and guidelines

  • The configuration of HTTP response header will affect the response actions of all resources’ client program under the DCDN domain name, rather than the actions of the cache server.
  • Currently, you can set the HTTP head only to the above mentioned parameters. To request other HTTP header parameter settings, open a ticket.
  • You can enter * to indicate all domain names or enter an absolute domain name for the Access-Control-Allow-Origin parameter. For example: Currently, wildcard domain names are not supported.


  1. On the Domain Names page, select a domain name, and click Configure.
  2. Go to Caching > HTTP Header, and click Add.

  3. You can set custom parameters for the HTTP header.