UDP communication with Node.js

TCP is everyhere, so everyone should rest sometimes 😎
I made simple server which listen to datagrams and do actions with file system by 'fs' module.

This example is a small antipattern. We shouldn't send a datagram with commands for file system manage (but it depends ...). If we send command for delete file, but file not exist, client should get a response with error, but this is not TCP ☺️
So in this kind of problem client/user cannot get information about transaction.

I created also UDP client with Node for show faster way to see result. For both app I use 'dgram' and 'fs' module in server part.

File system server commands

Server for fs management should get a special data buffer. In this kind I use a JSON.

• Create file

{
    "action": "CREATE_FILE",
    "fileName": "test.txt",
}

• Update file

{
    "action": "WRITE_INTO_FILE",
    "fileName": "test.txt",
    "content": "ala ma kota"
}

• Delete file

{
    "action": "DELETE_FILE",
    "fileName": "test.txt",
}

Start server

Go to node-udp-communication/udp-server and exc commands:

npm i
npm start

Execute commands for client (start server before this step)

With netcat

• Create file

echo "{\"action\": \"CREATE_FILE\", \"fileName\": \"test.txt\"}" | nc -w1 -u 127.0.0.1 8080

• Update file

echo "{\"action\": \"WRITE_INTO_FILE\", \"fileName\": \"test.txt\", \"content\": \"ala ma kota\"}" | nc -w1 -u 127.0.0.1 8080

• Delete file

echo "{\"action\": \"DELETE_FILE\", \"fileName\": \"test.txt\"}" | nc -w1 -u 127.0.0.1 8080

With Node.js client app

Go to node-udp-communication/udp-client and exc commands:

npm i
npm start

(App send DETELE command after 10 sec)

Requirements

• Node.js >= 10.0
• npm >= 6.0