gcloud compute backend-services add-signed-url-key - add Cloud CDN Signed URL key to a backend service

gcloud compute backend-services add-signed-url-keyBACKEND_SERVICE_NAME--key-file=LOCAL_FILE_PATH--key-name=KEY_NAME[GCLOUD_WIDE_FLAG …]

Cloud CDN Signed URLs give you a way to serve responses from the globallydistributed CDN cache, even if the request needs to be authorized.

Signed URLs are a mechanism to temporarily give a client access to a privateresource without requiring additional authorization. To achieve this, the fullrequest URL that should be allowed is hashed and cryptographically signed. Byusing the signed URL you give it, that one request will be considered authorizedto receive the requested content.

Generally, a signed URL can be used by anyone who has it. However, it is usuallyonly intended to be used by the client that was directly given the URL. Tomitigate this, they expire at a time chosen by the issuer. To minimize the riskof a signed URL being shared, it is recommended that the signed URL be set toexpire as soon as possible.

A 128-bit secret key is used for signing the URLs.

BACKEND_SERVICE_NAME

Name of the backend service to operate on.

--key-file=LOCAL_FILE_PATH

The file containing the RFC 4648 Section 5 base64url encoded 128-bit secret keyfor Cloud CDN Signed URL. It is vital that the key is strongly random. One wayto generate such a key is with the following command:

head-c16/dev/random|base64|tr+/-_ >[KEY_FILE_NAME]

--key-name=KEY_NAME

Name of the Cloud CDN Signed URL key.

Run$gcloud help for details.