net-promise

Simple net.Socket promise wrapper.

Installation

npm install --save net-promise

Usage

Basic Usage

The default message handler processes string messages and waits for a message ending with the character \n to fulfil the promise.

const { Socket, SocketError, SocketErrorType } = require("net-promise");
 
const ping = async() => {
 
  let socket;
  try {
 
    socket = await Socket({ host: 'localhost', port: 3000 });
 
    await socket.write("ping");
 
    const message = await socket.recv();
    console.log(message); //pong
 
  } catch (e) {
 
    if (e instanceof SocketError) {
      /*
        CONNECTION_REFUSED
        TRANSMISSION_ERROR
        CONNECTION_CLOSED
        TIMEOUT
      */
      console.log(e.type)
    }
 
  } finally {
    if (socket) socket.close();
  }
 
}

Idle Timeout

const { Socket, SocketError, SocketErrorType } = require("net-promise");
 
const ping = async() => {
 
  let socket;
  try {
 
    socket = await Socket({ host: 'localhost', port: 3000, timeout: 5 });
    
    await socket.recv();
    
  } catch (e) {
 
    if (e instanceof SocketError) {
      console.log(e.type) // TIMEOUT
    }
 
  } finally {
    if (socket) socket.close();
  }
 
}

Custom Message Handler

const { Socket, SocketError, SocketErrorType } = require("net-promise");
 
const ping = async() => {
 
  const myOwnMessageHandler = resolve => {
    const messages = [];
    let count = 0;
    return data => {
      count++;
      console.log("count", count);
      messages.push(data.toString());
      if (count === 10)
        resolve(messages.join(""));
    }
  }
 
  let socket;
  try {
 
    socket = await Socket({ host: 'localhost', port: 3000 }, myOwnMessageHandler);
    
    const message = await socket.recv();
    console.log(message);
    
  } catch (e) {
 
    if (e instanceof SocketError) {
      console.log(e.type)
    }
 
  } finally {
    if (socket) socket.close();
  }
 
}

License

This service is licensed under the MIT License.

All files located in the node_modules and external directories are externally maintained libraries used by this software which have their own licenses; we recommend you read them, as their terms may differ from the terms in the MIT License.