I can see the that in the config for Squid for example:
“You can set the global reply_body_max_size parameter. This option controls the largest HTTP message body that will be sent to a cache client for one request.
If the HTTP response coming from the server has a Content-length header, then Squid compares the content-length value to the reply_body_max_size value. If the content-length is larger,the server connection is closed and the user receives an error message from Squid. “
Is there a way I can identify this content-length value in a rule?