[squid-users] A simple external helper error

Hi,

     I try to write a simple external helper for test.

#!/bin/bash
while read ip ; do
if [ -e /tmp/test.err ] ; then
    echo "ERR"
else
    echo "OK"
fi
done

squid.conf

external_acl_type test_helper ttl=0 negative_ttl=0 grace=0 %SRC
/usr/lib64/squid/test.sh
acl testacl external test_helper

acl site1 dst 10.1.6.1

cache_peer proxy1.example.com parent 3128 0 name=P1 no-digest no-query
cache_peer proxy2.example.com parent 3128 0 name=P2 no-digest no-query

cache_peer_access P1 deny site1 testacl
cache_peer_access P1 allow all
cache_peer_access P2 allow all

  My plan is let site1 go through P1 proxy when exist /tmp/test.err
file. But I'm fail because I found squid didn't check testacl.
  0 requests in External ACL Statistics
# FD PID # Requests # Pending Flags Time Offset Request
1 38 21919 0 0 0.000 0 (none)
2 39 21920 0 0 0.000 0 (none)

  But I configure like this:

external_acl_type test_helper ttl=0 negative_ttl=0 grace=0 %SRC
/usr/lib64/squid/test.sh
acl testacl external test_helper
http_access testacl all
  .
  .
cache_peer_access P1 deny site1 testacl
cache_peer_access P1 allow all

  It work. so, I think maybe external helper can't work first with
cache_peer_access?

  My Squid Cache: Version 3.1.10

--
Regards,
John Xue