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#! /usr/bin/env 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"
# 20230423 GR Added option -V to require particular HTTP version
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=" " REQVER=1.0
while [ -n "$1" ]; do
case "$1" in
-w) n="$2"; while [ "$n" -gt 0 ]; do SPACES="$SPACES "; n=$((n-1)); done
shift ;;
-V) shift; REQVER="$1" ;;
#-s) STAT="$2"; shift ;;
esac
shift
done
# read and parse HTTP request
read l
if ! echo "$l" |grep -E '^CONNECT +[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:[0-9]+ +HTTP/[1-3].[0-9]$' >/dev/null
then
echo "HTTP/1.0${SPACES}500 Bad Request"
echo
exit
fi
if ! echo "$l" |grep -E '^CONNECT +[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:[0-9]+ +HTTP/'"$REQVER"'$' >/dev/null
then
echo "HTTP/1.0${SPACES}426 Upgrade Required"
echo
exit
fi
# read more headers until empty line
while [ -n "$l" ]; do
read l
done
# send status
echo "HTTP/$REQVER${SPACES}200 OK"
# send empty line
echo
# perform echo function
exec $CAT
|
