wifi-comms-handler

About

Handler for commands sent over LAN via TCP

Use

• Clone the repo
• Edit src/comms/comms.json to include an array of json objects with attributes in (wifi command) and out (local command)
• Run the program and specify the PORT

go run src/handler.go PORT

Server commands

• quit - exit the program

Examples

Scanner

json

[
  {
    "in": "scan",
    "out": "/home/gelos/.scripts/scanner.sh %s"
  }
]

scan command maps to running a bash script scanner.sh carrying over 1 string arg %s

bash script

#!/bin/bash

if [ "$#" -eq 1 ]
then
  scanimage --device escl:http://10.0.0.249:80 --format=png > ~/Downloads/$1.png
else
  echo "wrong number of arguments supplied"
fi

bash script runs scanner and outputs to file in ~/Documents with arg name

client source

import socket
import sys
# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

server_address = ('localhost', 2222)
print(sys.stderr, 'connecting to %s port %s' % server_address)
socket.connect(server_address)

socket.sendall(b'scan output-file\n')

while True:
  print(sock.recv(128))

client source code run after server start with name output-file (line 11)

results

$ go run handler.go 2222
creating connection with  [127.0.0.1:54468]
[127.0.0.1:54468] /home/gelos/.scripts/scanner.sh [output-file]

$ ls | grep output-file
output-file.png

scanned image saved to ~/Downloads folder