Access URL format
When the MD5 value is calculated, if the request path is
http://cloud.tencent.com/test.jpg, then the path used for MD5 calculation will be
TypeC requires the following configuration:
Custom Authentication Key: it contains 6–32 uppercase and lowercase letters and digits. The key should be kept private and known only to the client and server.
Custom Validity Period: the
timestamp value in the request path, plus the configured validity period, is compared with the current time to determine whether the request has expired. If yes, a 403 error will be directly returned.
After configuring the key, parameter name, and validity period, you can specify the authentication object as needed. The following three modes are supported:
Cache hit rate
If you have enabled TypeC authentication for a domain name, it will be carried in the access URL path. When a CDN node caches the resource, it will automatically ignore the authentication path and thus not affect the cache hit rate.
The access format of a domain name with TypeC authentication mode enabled is as follows:
If the CDN node is not hit after successful authentication, it will initiate an origin-pull request, in which the
timestamp will be removed from the path. The origin server does not need to process the authentication information.