DearI found an acl (rep_header) useful, to prevent sending bigfiles to icap_server. for example 3 MB .
this config line was added. acl test rep_header Content-Length ^(1|2)?+[0-9]{0-5}$ icap_access s1 allow test icap_access s1 deny all but unfortunately all of downloaded files were denied . where is the error?thanks for your help