# http://askubuntu.com/questions/53443/how-do-i-ignore-a-proxy-if-not-available
# altered because testing a down proxy takes like 2 seconds,
# and we would do it like 100 times in a row. so cache a failed result
-# locally for 1 hour. Also, using newer option based on man apt.conf.
+# locally for 10 minutes. Also, using newer option based on man apt.conf.
+#
+# Once when I was testing, it seemed I needed to have it output
+# DIRECT after toutputing the proxy url
proxy_host=faiserver
proxy_port=3142
-proxy_url=http://$proxy_host:$proxy_port
+proxy_url=http://$proxy_host:$proxy_port/
f=/tmp/apt_proxy_fail
-if [[ ! -r $f ]] \
- || (( $(( $(date +%s) - $(stat -c %Y $f ) )) > 60*60 )); then
- if host $proxy_host && nc -z $proxy_host $proxy_port; then
- echo $proxy_url
- else
+if [[ ! -w /tmp ]]; then
+ echo DIRECT
+ exit 0
+fi
+modtime=$(stat -c %Y $f 2>/dev/null ) ||:
+if [[ $modtime ]] && (( $(( $(date +%s) - modtime )) < 60*10 )); then
+ echo DIRECT
+ exit 0
+else
+ rm -f $f
+fi
+if getent hosts $proxy_host &>/dev/null && timeout 1 nc -z $proxy_host $proxy_port &>/dev/null; then
+ echo $proxy_url
+else
+ if [[ ! -e $f || -w $f ]]; then
touch $f
fi
fi
-echo DIRECT