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|
#! /bin/sh
# vim:set fdm=marker:
set -euf
Server='htgen-plain/1.0'
## htgen --serve {{{
case $# in
(1)
case "$1" in
(--serve)
HTGEN_HOST="${HTGEN_HOST-0.0.0.0}"
HTGEN_PORT="${HTGEN_PORT-42380}"
TCPSERVER_OPTS='-c 423 -t 2 -D'
echo "#### $Server $HTGEN_HOST:$HTGEN_PORT" >&2
exec tcpserver $TCPSERVER_OPTS "$HTGEN_HOST" "$HTGEN_PORT" "$0"
## this should not happen...
exit 23
esac
esac
## }}}
## reply_404 {{{
reply_404() {
cat<<EOF
HTTP/1.0 404 Not Found
Content-Type: text/plain; charset=UTF-8
Server: $Server
Connection: close
Content-Length: 0
EOF
}
## }}}
## date. {{{
#date=`date --rfc-3339=ns`
date="`date '+%Y-%m-%d %H:%M:%S'`"
cat>&2<<EOF
# ${TCPREMOTEHOST-}[$TCPREMOTEIP]:$TCPREMOTEPORT connected at $date over $PROTO
EOF
## }}}
## Parse Request-Line. {{{
read Request_Line
eval "$(echo "$Request_Line" | sed -rn '
s^([a-zA-Z]+) ([a-zA-Z0-9?&+*/.-]+) HTTP/([0-9]+\.[0-9]+)\r$\
Request_Line="&"\
Method="\1"\
Request_URI="\2"\
HTTP_Version="\3"\
p;t;i\
Request_Line= # invalid request
')"
#echo "Request-Line: $Request_Line" >&2
# cat>&2<<EOF
# Request_Line='$Request_Line'
# Method='$Method'
# Request_URI='$Request_URI'
# HTTP_Version='$HTTP_Version'
# EOF
## debug
cat>&2<<EOF
[1;33m$Method[m [1;4;34m$Request_URI[m HTTP/$HTTP_Version
EOF
## }}}
## Parse HTTP-Headers. {{{
# TODO support https://tools.ietf.org/html/rfc7230#section-3.2.4, obs-fold?
# TODO allow headers to appear multiple times
k=
v=
while read -r line; do
line=${line%
}
case $line in
'')
break
;;
[A-Za-z][0-9A-Za-z-]*:*)
k=${line%%:*}
k=${k//-/_}
k=${k,,}
k=req_$k
v=${line#*: }
v=${v## }
printf '[35m%s=[1m%s[m\n' "$k" "$v" >&2
export "$k=$v"
;;
esac
done
unset k v
echo >&2
## }}}
# run server: STATEDIR=/tmp/htgen-state HTGEN_PORT=1080 ./htgen --serve
# paste: echo lol | curl http://localhost:1080 -d @-
case "$Method $Request_URI" in
"GET /"[0-9a-z]*)
item=$STATEDIR/items$Request_URI
if test -e $item; then
printf 'HTTP/1.1 200 OK\r\n'
printf 'Content-Type: %s\r\n' "$(file -ib $item)"
printf 'Server: %s\r\n' "$Server"
printf 'Connection: close\r\n'
printf 'Content-Length: %d\r\n' $(wc -c < $item)
printf '\r\n'
cat $item
exit
fi
;;
"POST /")
content=$(mktemp -t htgen.$$.content.XXXXXXXX)
trap "rm $content >&2" EXIT
case ${req_expect-} in 100-continue)
printf 'HTTP/1.1 100 Continue\r\n\r\n'
esac
head -c $req_content_length > $content
sha256=$(sha256sum -b $content | cut -d\ -f1)
base32=$(nix-hash --to-base32 --type sha256 $sha256)
item=$STATEDIR/items/$base32
ref=http://$req_host/$base32
if ! test -e $item; then
mkdir -v -p $STATEDIR/items >&2
cp -v $content $item >&2
fi
printf 'HTTP/1.1 200 OK\r\n'
printf 'Content-Type: text/plain; charset=UTF-8\r\n'
printf 'Server: %s\r\n' "$Server"
printf 'Connection: close\r\n'
printf 'Content-Length: %d\r\n' $(expr ${#ref} + 1)
printf '\r\n'
printf '%s\n' "$ref"
exit
;;
esac
reply_404
exit
|
