#!/usr/bin/env bash


if [[ "$REQUEST_METHOD" == "DELETE" ]]; then
	rm -f ../uploads/*
	printf "%s\r\n\r\n" "HTTP/1.1 200 OK"
fi
if [[ "$REQUEST_METHOD" == "GET" ]]; then
	printf "%s\r\n" "HTTP/1.1 200 OK"
	printf "%s\r\n\r\n" "Content-Type: text/html"
	echo "<ul>"
	find ../uploads -type f -printf "%T@ %p\n" | sort -nr | cut -d' ' -f2- | sed 's/^..\/uploads\///' | awk '{ print "<li><a href=\"uploads/"$0"\">"$0"</a></li>"; }'
	echo "</ul>"
fi
if [[ "$REQUEST_METHOD" == "POST" ]]; then
	BOUNDARY="${HTTP_CONTENT_TYPE#*=}"
	declare post_multipart
	tmpfile=$(mktemp)
	dd iflag=fullblock of=$tmpfile ibs=${CONTENT_LENGTH} count=1 obs=1M

	delimeter_len=$(echo -n "${BOUNDARY}"$'\015' | wc -c)
	boundaries_list=$(echo -ne $(grep $tmpfile -ao -e ${BOUNDARY} --byte-offset | sed -E 's/:(.*)//g') | sed -E 's/ [0-9]+$//')
	outfile="../uploads/$(head -n2 $tmpfile | tail -n1 | sed 's/^.*filename="\(.*\)".*/\1/')"

	for i in $boundaries_list; do
		tmpout=$(mktemp)
		dd iflag=fullblock if=$tmpfile ibs=$(($i+$delimeter_len)) obs=1M skip=1 | while true; do
			read line
			if [[ $line == $'\015' ]]; then
				cat - > $tmpout
				break
			fi
		done
		length=$(grep $tmpout --byte-offset -ae ${BOUNDARY} | sed -E 's/:(.*)//' | head -n 1)
		post_multipart+=($outfile)
		dd iflag=fullblock if=$tmpout ibs=$length count=1 obs=1M of=$outfile
		rm $tmpout
	done
	rm $tmpfile

	chmod 777 "$outfile"
	chmod -x "$outfile"

	printf "%s\r\n" "HTTP/1.1 302 OK"
	printf "%s\r\n\r\n" "Location: ../upload.html"
fi