client_server_lan

Pub Documentation

A LAN communication Flutter package based off Node Commander but removing parts such as Commander Nodes and making communication between client and server two way.

Usage

Add to android files

In android/app/AndroidManifest

<application ...
  android:networkSecurityConfig="@xml/network_security_config" >

 <meta-data android:name="io.flutter.network-policy"
        android:resource="@xml/network_security_config"/>

Then create a folder xml inside create a file: network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
  <base-config cleartextTrafficPermitted="true">
     <trust-anchors>
        <certificates src="system" />
    </trust-anchors>
  </base-config>
 </network-security-config>

Run a Node

Start a Server Node

import 'dart:async';
import 'package:client_server_lan/client_server_lan.dart';
ServerNode server;
void startServer() async {
    server = ServerNode(
      name: "server_name",//any text name
      verbose: true,//output for debugging purposes
      onDispose: onDispose,//function run on server disposed
      clientDispose: clientDispose,//function run on client dispose
    );
    await server.init();
    await server.onReady;
    setState(() {
      serverStatus = "Server ready on ${server.host}:${server.port}";
    });
    server.dataResponse.listen((DataPacket data) {
      setState(() {
        String dataReceived = data.payload;
      });
    });

Start a Client Node

import 'dart:async';
import 'package:client_server_lan/client_server_lan.dart';
ClientNode client;
void startClient() async {
    client = ClientNode(
      name: clientName,//any text name
      verbose: true,//output for debugging purposes
      onDispose: onDispose,//function run on client dispose
    );
    await client.init();
    await client.onReady;
    setState(() {
      clientStatus = "Client ready on ${client.host}:${client.port}";
    });
    client.dataResponse.listen((DataPacket data) {
      setState(() {
        String dataReceived = data.payload;
      });
    });
  }

Server scan for Clients

void findClients() async {
    server.discoverNodes();
    await Future<Object>.delayed(const Duration(seconds: 2));
    //outputs client names and IPs (not neccessary)
    setState(() {
      clientIPs = "";
    });
    for (final s in server.clientsConnected) {
      setState(() {
        clientIPs += "id=${s.name},IP=${s.address}\n";
      });
    }
  }

Transfer Data

WARNING: Data not excepted with titles in client.internalTitles/server.internalTitles

Transfer from Client to Server

void clientToServer(String dataToSend) async {
    await client.sendData(dataToSend, "userInfo");
  }

Transfer from Server to Client

void serverToClient(String dataToSend, String clientName) async {
    final String client = server.clientUri(clientName);
    await server.sendData(dataToSend, "userInfo", client);
  }

Example

New Example app courtesy of Fikrirazzaq

Example

Libraries

client_server_lan