#!/usr/bin/env bash
set -eu
TMP_FILE=$(mktemp -q /tmp/server.XXXXXX)
stop() {
trap - SIGINT EXIT
{ pkill -f socat || true; } 2>/dev/null
[ -f "$TMP_FILE" ] && rm -f "$TMP_FILE"
}
trap 'stop' EXIT SIGINT SIGTERM SIGHUP
html()
{
local h="VirtualDSM"
h="${h} "
h="${h}
$1
"
echo "$h"
}
if [[ "$2" != "/"* ]]; then
BODY="$2"
if [[ "$BODY" == "install" ]]; then
BODY="Please wait while Virtual DSM is being installed..."
BODY="$BODY"
fi
HTML=$(html "$BODY")
printf '%b' "HTTP/1.1 200 OK\nContent-Length: ${#HTML}\nConnection: close\n\n$HTML" > "$TMP_FILE"
socat TCP4-LISTEN:"${1:-5000}",reuseaddr,fork,crlf SYSTEM:"cat ${TMP_FILE}" 2> /dev/null & wait $!
else
if [[ "$2" != "/run/ip.sh" ]]; then
cp "$2" "$TMP_FILE"
else
BODY="The location of DSM is http://\${IP}:\${PORT}"
WAIT="Please wait while discovering IP..."
HTML=$(html "xxx")
{ echo "#!/bin/bash"
echo "INFO=\$(curl -s -m 2 -S http://127.0.0.1:2210/read?command=10 2>/dev/null)"
echo "rest=\${INFO#*http_port}; rest=\${rest#*:}; rest=\${rest%%,*}; PORT=\${rest%%\\\"*}"
echo "rest=\${INFO#*eth0}; rest=\${rest#*ip}; rest=\${rest#*:}; rest=\${rest#*\\\"}; IP=\${rest%%\\\"*}"
echo "HTML=\"$HTML\"; [ -z \"\${IP}\" ] && BODY=\"$WAIT\" || BODY=\"$BODY\"; HTML=\${HTML/xxx/\$BODY}"
echo "printf '%b' \"HTTP/1.1 200 OK\\nContent-Length: \${#HTML}\\nConnection: close\\n\\n\$HTML\""
} > "$TMP_FILE"
fi
chmod +x "$TMP_FILE"
socat TCP4-LISTEN:"${1:-5000}",reuseaddr,fork,crlf SYSTEM:"$TMP_FILE" 2> /dev/null & wait $!
fi