77 lines
1.6 KiB
Bash
Executable File
77 lines
1.6 KiB
Bash
Executable File
#! /bin/bash
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# source: proxy.sh
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# Copyright Gerhard Rieger 2003-2004
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# Published under the GNU General Public License V.2, see file COPYING
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# perform primitive simulation of a proxy server.
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# accepts and answers correct HTTP CONNECT requests on stdio, and tries to
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# establish the connection to the given server.
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# it is required for socats test.sh
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# for TCP, use this script as:
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# socat tcp-l:8080,reuseaddr,fork exec:"proxy.sh",nofork
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if [ -z "$SOCAT" ]; then
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if type socat >/dev/null 2>&1; then
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SOCAT=socat
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else
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SOCAT="./socat"
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fi
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fi
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if [ $(echo "x\c") = "x" ]; then E=""
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elif [ $(echo -e "x\c") = "x" ]; then E="-e"
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else
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echo "cannot suppress trailing newline on echo" >&2
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exit 1
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fi
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ECHO="echo $E"
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CR=$($ECHO "\r")
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#echo "CR=$($ECHO "$CR\c" |od -c)" >&2
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case `uname` in
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HP-UX|OSF1)
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# their cats are too stupid to work with unix domain sockets
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CAT="$SOCAT -u stdin stdout"
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;;
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*)
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CAT=cat
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;;
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esac
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SPACES=" "
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while [ -n "$1" ]; do
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case "$1" in
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-w) n="$2"; while [ "$n" -gt 0 ]; do SPACES="$SPACES "; n=$((n-1)); done
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shift ;;
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#-s) STAT="$2"; shift ;;
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esac
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shift
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done
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# read and parse HTTP request
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read l
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if echo "$l" |egrep '^CONNECT +[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:[0-9]+ +HTTP/1.[01]' >/dev/null
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then
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: go on below
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else
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$ECHO "HTTP/1.0${SPACES}500 Bad Request$CR"
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$ECHO "$CR"
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exit
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fi
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# extract target server name/address
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s=`echo $l |awk '{print($2);}'`
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# read more headers until empty line
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while [ "$l" != "$CR" ]; do
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read l
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done
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# send status
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$ECHO "HTTP/1.0${SPACES}200 OK$CR"
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# send empty line
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$ECHO "$CR"
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# perform proxy (relay) function
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exec $SOCAT $SOCAT_OPTS - tcp:$s
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