/usr/share/doc/socat/examples/proxyecho.sh is in socat 1.7.3.2-2ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | #! /bin/bash
# source: proxyecho.sh
# Copyright Gerhard Rieger and contributors (see file CHANGES)
# Published under the GNU General Public License V.2, see file COPYING
# perform primitive simulation of a proxy server with echo function via stdio.
# accepts and answers correct HTTP CONNECT requests, but then just echoes data.
# it is required for test.sh
# for TCP, use this script as:
# socat tcp-l:8080,reuseaddr,crlf system:"proxyecho.sh"
if type socat >/dev/null 2>&1; then
SOCAT=socat
else
SOCAT=./socat
fi
case `uname` in
HP-UX|OSF1)
CAT="$SOCAT -u stdin stdout"
;;
*)
CAT=cat
;;
esac
SPACES=" "
while [ -n "$1" ]; do
case "$1" in
-w) n="$2"; while [ "$n" -gt 0 ]; do SPACES="$SPACES "; n=$((n-1)); done
shift ;;
#-s) STAT="$2"; shift ;;
esac
shift
done
# read and parse HTTP request
read l
if echo "$l" |egrep '^CONNECT +[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:[0-9]+ +HTTP/1.[01]$' >/dev/null
then
: go on below
else
echo "HTTP/1.0${SPACES}500 Bad Request"
echo
exit
fi
# read more headers until empty line
while [ -n "$l" ]; do
read l
done
# send status
echo "HTTP/1.0${SPACES}200 OK"
# send empty line
echo
# perform echo function
exec $CAT
|