#!/bin/sh

read -r req
req=$(printf '%s' "$req" | tr -d '\r')
req=${req#/}
req=${req%/}
[ -z "$req" ] && req="index"
req=$(printf '%s' "$req" | sed 's#[^a-zA-Z0-9./_-]##g')

case "$req" in
  *".."*) exit 1 ;;
esac

f="/var/nex/$req"
[ -r "$f" ] && [ -f "$f" ] && cat "$f"