I try to create simple chat application using secure layer WSS. Without wss it works. Here is my code:
FleckLog.Level = LogLevel.Info;
var allsockets = new List<IWebSocketConnection>();
var server = new WebSocketServer("wss://localhost:8181");
server.Certificate = new X509Certificate2(#"C:\Users\user\Desktop\sharpchat-master\server\Sharpchat\Certificate.pfx", "123");
server.Start(socket =>
{
socket.OnOpen = () =>
{ //See socket.ConnectionInfo.* for additional informations
Console.WriteLine(String.Empty);
Console.WriteLine("[NEW CLIENT CONNECTION]======================");
Console.WriteLine("GUID: " + socket.ConnectionInfo.Id);
Console.WriteLine("IP: " + socket.ConnectionInfo.ClientIpAddress);
Console.WriteLine("Port: " + socket.ConnectionInfo.ClientPort);
Console.WriteLine("=============================================");
Console.WriteLine(String.Empty);
allsockets.Add(socket);
};
socket.OnClose = () =>
{
Console.WriteLine(String.Empty);
Console.WriteLine("[DISCONNECTED CLIENT]=======================");
Console.WriteLine("GUID: " + socket.ConnectionInfo.Id);
Console.WriteLine("IP: " + socket.ConnectionInfo.ClientIpAddress);
Console.WriteLine("Port: " + socket.ConnectionInfo.ClientPort);
Console.WriteLine("=============================================");
Console.WriteLine(String.Empty);
allsockets.Remove(socket);
};
socket.OnMessage = (message) =>
{
//TODO: Json.Net Deserialize
Console.WriteLine("[JSON MESSAGE] " + message);
allsockets.ToList().ForEach(s => s.Send(message));
};
});
var input = Console.ReadLine();
while (input != "exit")
{
foreach (var socket in allsockets.ToList())
{
socket.Send(input);
}
input = Console.ReadLine();
}
When client connects to server there is an exception:
[Warn] Failed to Authenticate System.AggregateEx
ception: One or more errors occurred. ---> System.IO.IOException: The handshake
failed due to an unexpected packet format.
at System.Net.Security.SslState.InternalEndProcessAuthentication(LazyAsyncRes
ult lazyResult)
at System.Net.Security.SslState.EndProcessAuthentication(IAsyncResult result)
at System.Net.Security.SslStream.EndAuthenticateAsServer(IAsyncResult asyncRe
sult)
at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar,
Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchron
ization)
--- End of inner exception stack trace ---
---> (Inner Exception #0) System.IO.IOException: The handshake failed due to an
unexpected packet format.
at System.Net.Security.SslState.InternalEndProcessAuthentication(LazyAsyncRes
ult lazyResult)
at System.Net.Security.SslState.EndProcessAuthentication(IAsyncResult result)
at System.Net.Security.SslStream.EndAuthenticateAsServer(IAsyncResult asyncRe
sult)
at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar,
Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchron
ization)<---
Here is client code in JavaScript:
// Websocket Endpoint url
var URL = 'wss://localhost:8181';
var chatClient = null;
function connect () {
chatClient = new WebSocket(URL);
chatClient.onmessage = function (event) {
var messagesArea = document.getElementById("messages");
var jsonObj = JSON.parse(event.data);
var message = "<"+ jsonObj.user + "> " + jsonObj.message + "\r\n";
messagesArea.value = messagesArea.value + message;
messagesArea.scrollTop = messagesArea.scrollHeight;
};
}
function disconnect () {
chatClient.close();
}
function sendMessage() {
var user = document.getElementById("userName").value.trim();
if (user === "")
alert ("Please enter your name!");
var inputElement = document.getElementById("messageInput");
var message = inputElement.value.trim();
if (message !== "") {
var jsonObj = {"user" : user, "message" : message};
chatClient.send(JSON.stringify(jsonObj));
inputElement.value = "";
}
inputElement.focus();
}
Can anyone help me fix this problem?
Thank you very much!
Use full domain name in URL i.e. var URL = 'wss://localhost.company.com:8181';
Allow invalid certificates for resources loaded from localhost # Enable.
More Details are here
Related
I have a websocket listening on some interfaces so the client could call more than one ip. I don't have a dns for these IPs. This failes even in the try block
window.onload = function() {
ws = "";
try {
ws_connection = "ws://" + lblInfoIP.value + ":9080/websockets";
ws = new WebSocket(ws_connection);
}
catch(err) {
ws_connection = "ws://127.0.01:9080/websockets";
ws = new WebSocket(ws_connection);
}
ws.onmessage = function(msg) { showInfo(msg.data); };
ws.onerror = function(evt){ alert ('Websocket failed with ' + evt.data) };
}
manually using the same ip as the called url works.
How would I correctly handle that ?
Is there somesthing like ws_connection = "ws://" + called_url + "/websockets"; ?
Instead of your try/catch construct, use a simple "or" (||) operation:
window.onload = function () {
let ws = new WebSocket(`ws://${lblInfoIP.value || "127.0.01:9080"}/websockets`)
ws.onmessage = function (msg) { showInfo(msg.data); };
ws.onerror = function (evt) { alert('Websocket failed with ' + evt.data) };
}
In development, set lblInfoIP.value to null or "undefined".
Or use "document.location.host:9080"
I have simple project about connect between java server and javascript client via websocket.
Here my HTML file:
<body>
<h3>Demo WebSocket</h3>
<script type="text/javascript">
var arr;
var websocket;
connect();
function connect() {
websocket = new WebSocket('ws://127.0.0.1:4444');
websocket.onopen = function () {
var i = (typeof websocket != 'undefined' && websocket.readyState == WebSocket.OPEN);
textAreaMessage.value += "Server ..." + i + "\n";
};
websocket.onmessage = function (message) { processMessage(message); };
websocket.onclose = function (message) { processClose(message); };
websocket.onerror = function (message) { processError(message); };
}
function disconnect() {
websocket.close();
}
function processOpen(message) {
}
function processMessage(message) {
console.log(message);
arr = JSON.parse(message.data)
textAreaMessage.value += "Response From Server ==> " + arr[0] + " \n";
}
function processClose(message) {
textAreaMessage.value += "Server Disconnect... \n";
}
function processError(message) {
textAreaMessage.value += "Error... " + message + " \n";
}
function sendMessage() {
if (typeof websocket != 'undefined' && websocket.readyState == WebSocket.OPEN) {
websocket.send(textMessage.value);
textAreaMessage.value += "Send to Server ==> " + textMessage.value + " \n";
textMessage.value = "";
}
}
</script>
</body>
when server send String via websocket to client, value of massage will store in mesage.data but i converted it to JavaScript object use arr = JSON.parse(message.data)
And then i conole.log(arr) and i see:
and I get each element of arr via index like: arr[index].
The important thing is when the new value come via websocket then the value of element also change. I want display the value of element in page and its displayed value automatically changes when its value is changed.
Somebody can help me?
Sorry about my grammar.
Thank you so much!
I am trying to run this program in Raspberry Pi 3.
I have installed nodejs and ws on my raspberry pi.
Then I installed serial port module.
I am trying to create this project:enter link description here
I have tried to find solutions everywhere but I could not find one.
If any one knows how to solve this problem please help me.
var webSocketUrl = "wss://api.artik.cloud/v1.1/websocket?ack=true";
var device_id = "5bb3ba9304674086bee67fa507a215cf"; //DEVICE ID
var device_token = "36b278345b6d4d11abf764ae213c5c70"; //DEVICE TOKEN
var WebSocket = require('ws');
var isWebSocketReady = false;
var data="";
var ws = null;
var serialport = require("serialport");
var SerialPort = serialport.SerialPort;
var sp = new SerialPort("/dev/ttyACM0", { //for serial communication with arduino
baudrate: 9600,
// The baud rate of uno is 9600
parser: serialport.parsers.readline("\n")
});
/**
* Gets the current time in millis
*/
function getTimeMillis(){
return parseInt(Date.now().toString());
}
/**
* Create a /websocket connection and setup GPIO pin
*/
function start() {
//Create the WebSocket connection
isWebSocketReady = false;
ws = new WebSocket(webSocketUrl);
ws.on('open', function() {
console.log("WebSocket connection is open ....");
register();
});
ws.on('message', function(data) {
//this loop is called whenever the client sends some message
handleRcvMsg(data); //data is send to the function handleRcvMsg()
});
ws.on('close', function() {
console.log("WebSocket connection is closed ....");
});
}
/**
* Sends a register message to /websocket endpoint
*/
//Client will only work when device gets registered from here
function register(){
console.log("Registering device on the WebSocket connection");
try{
var registerMessage = '{"type":"register", "sdid":"'+device_id+'", "Authorization":"bearer '+device_token+'", "cid":"'+getTimeMillis()+'"}';
console.log('Sending register message ' + registerMessage + '\n');
ws.send(registerMessage, {mask: true});
isWebSocketReady = true;
}
catch (e) {
console.error('Failed to register messages. Error in registering message: ' + e.toString());
}
}
//data after receiving is sent here for processing
function handleRcvMsg(msg){
var msgObj = JSON.parse(msg);
if (msgObj.type != "action") return; //Early return;
var actions = msgObj.data.actions;
var actionName = actions[0].name; //assume that there is only one action in actions
console.log("The received action is " + actionName);
}
/**
* Send one message to ARTIK Cloud
*/
//This function is responsible for sending commands to cloud
//function sendStateToArtikCloud(parking,temperature,water){
function sendDataToArtikCloud(pantry){
var result=pantry.split(" ");//data gets split by " " to get the values
try{
ts = ', "ts": '+getTimeMillis();
var data = {
"Garlic": result[1],
"Potato":result[2],
"Temperature":result[3],
"Chilli":result[4],
"Humidity": result[5],
"Ginger":result[6],
"Onion": result[7]
};
var payload = '{"sdid":"'+device_id+'"'+ts+', "data": '+JSON.stringify(data)+', "cid":"'+getTimeMillis()+'"}';
console.log('Sending payload ' + payload + '\n');
ws.send(payload, {mask: true});
} catch (e) {
console.error('Error in sending a message: ' + e.toString() +'\n');
}
}
function exitClosePins() {
console.log('Exit and destroy all pins!');
process.exit();
}
start();
//exectes every second when data is received from arduino (5sec programmed delay from arduino)
sp.on("open", function () {
sp.on('data', function(data) {
console.log("Serial port received data:" + data);
//var result=data.split(" ");//data gets split by " " to get the values
//sendStateToArtikCloud(result[0],result[2],result[1]);//parking,temperature,waterlevel
sendDataToArtikCloud(data);
});
});
process.on('SIGINT', exitClosePins);
I am getting an error on my raspberry pi
enter image description here
Suggest me a solution.
The documentation will tell you that Readline is spelled with a capital R
https://www.npmjs.com/package/serialport#module_serialport--SerialPort.parsers
parser: serialport.parsers.Readline("\n")
~
[TypeError: serialport.parsers.readline is not a function.]
If it has not been resolved yet, try this method.
var serialport = require("serialport")
var SerialPort = serialport.SerialPort;
var sp = new serialport("/dev/ttyACM0"),{
BaudRate: 9600,
parser: new serialport.parsers.Readline("\r\n")
});
I hope your problem is solved.
I'm writing a telegram bot to report fail2ban bans. It's very simple and dirty, written hastily, but it can be used to report any message to a single telegram user:
var TelegramBot = require('node-telegram-bot-api');
var fs = require('fs');
var store = {
get: function (key) {
return fs.readFileSync(__dirname + '/' + key, { encoding: 'utf-8' });
},
set: function (key, value) {
fs.writeFileSync(__dirname + '/' + key, value, { encoding: 'utf-8' });
}
};
var token = store.get('token');
var args = process.argv.slice(2);
if (args.length == 0) {
console.error('No mode specified');
process.exit(0);
}
TelegramBot.prototype.unregisterText = function (regexp) {
for (var i = 0; i < bot.textRegexpCallbacks.length; ++i) {
if (bot.textRegexpCallbacks[i].regexp.toString() == regexp) {
bot.textRegexpCallbacks.splice(i, 1);
return;
}
}
};
fs.appendFileSync(__dirname + '/logs',
'[' + (new Date().toISOString().replace(/T/, ' ').replace(/\..+/, '')) + '] '
+ args.join(' ') + '\n',
{ encoding: 'utf-8' });
switch (args[0]) {
case 'setup':
var bot = new TelegramBot(token, { polling: true });
var step = 'none';
bot.onText(/\/setup/, function (msg, match) {
var fromId = msg.from.id;
step = 'setup-started';
bot.sendMessage(fromId, 'Starting setup. Please enter the verification key.');
bot.onText(/(.+)/, function (msg, match) {
if (step == 'setup-started') {
var key = match[1];
var verification = store.get('key');
if (key == verification) {
store.set('owner', msg.from.id);
step = 'verified';
bot.sendMessage(msg.from.id, 'Correct. Setup complete.');
} else {
step = 'none';
bot.unregisterText(/(.+)/);
bot.sendMessage(msg.from.id, 'Wrong. Setup aborted.');
}
}
});
});
break;
case 'report':
var bot = new TelegramBot(token, { polling: false });
var owner = store.get('owner');
var subject = args[1];
if (subject == 'message') {
var message = args.slice(2).join(' ');
bot.sendMessage(owner, message);
} else if (subject == 'file') {
var content = fs.readFileSync(args[2], { encoding: 'utf-8' });
bot.sendMessage(owner, content);
}
break;
default:
console.error('Unrecognized mode', args[0]);
break;
}
On my developer machine it works fine. I invoke:
node bot.js report message whatever message i want
And I correctly received "whatever message i want" on telegram. However, once I gitted it on my digitalocean vps, it no longer worked. It turns out the problem is with the telegram library:
Unhandled rejection Error: Error parsing Telegram response: <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Bots: An introduction for developers</title>
...
Which apparently returns an html page instead of json... I also tried to contact the same endpoint (api.telegram.org/bothash/sendMessage) with curl on my vps and it returned json (with an error message because i didnt send any parameters, but still json).
I cannot fathom why this happens. Any help?
It seems like either you don't have a file with token on your VPN or the token is incorrect.
You can check it by yourself:
When you make a request to api.telegram.org/{token}/sendMessage, and {token} is incorrect, it redirects you to this page, which responds with HTML you've mentioned in your question.
So you have to debug a behavior of your store.get and store.get functions along with files and tokens to make sure you are using a correct one.
Also, I'd recommend to run bot.getMe() before using any other Telegram API methods to ensure you specified a correct bot token.
I would like to send a message through socket with c# windows store app client to node.js and socket.io server
my client side code is like this (c#)
private async void SendDatatoSocket(string sendTextData)
{
if (!connected)
{
StatusText = "Must be connected to send!";
return;
}
Int32 wordlength = 0; // Gets the UTF-8 string length.
try
{
OutputView = "";
StatusText = "Trying to send data ...";
txtblock_showstatus.Text += System.Environment.NewLine;
txtblock_showstatus.Text += StatusText;
Debug.WriteLine(StatusText);
// add a newline to the text to send
string sendData = sendTextData + Environment.NewLine;
DataWriter writer = new DataWriter(clientSocket.OutputStream);
wordlength = sendData.Length; // Gets the UTF-8 string length.
// Call StoreAsync method to store the data to a backing stream
await writer.StoreAsync();
StatusText = "Data was sent" + Environment.NewLine;
txtblock_showstatus.Text += System.Environment.NewLine;
txtblock_showstatus.Text += StatusText;
Debug.WriteLine(StatusText);
// detach the stream and close it
writer.DetachStream();
writer.Dispose();
}
catch (Exception exception)
{
// If this is an unknown status,
// it means that the error is fatal and retry will likely fail.
if (SocketError.GetStatus(exception.HResult) == SocketErrorStatus.Unknown)
{
throw;
}
StatusText = "Send data or receive failed with error: " + exception.Message;
txtblock_showstatus.Text += System.Environment.NewLine;
txtblock_showstatus.Text += StatusText;
Debug.WriteLine(StatusText);
// Could retry the connection, but for this simple example
// just close the socket.
closing = true;
clientSocket.Dispose();
clientSocket = null;
connected = false;
}
// Now try to receive data from server
try
{
OutputView = "";
StatusText = "Trying to receive data ...";
Debug.WriteLine(StatusText);
txtblock_showstatus.Text += System.Environment.NewLine;
txtblock_showstatus.Text += StatusText;
DataReader reader = new DataReader(clientSocket.InputStream);
string receivedData;
reader.InputStreamOptions = InputStreamOptions.Partial;
var count = await reader.LoadAsync(512);
if (count > 0)
{
receivedData = reader.ReadString(count);
Debug.WriteLine(receivedData);
txtblock_showstatus.Text += System.Environment.NewLine;
txtblock_showstatus.Text += receivedData;
}
}
catch (Exception exception)
{
// If this is an unknown status,
// it means that the error is fatal and retry will likely fail.
if (SocketError.GetStatus(exception.HResult) == SocketErrorStatus.Unknown)
{
throw;
}
StatusText = "Receive failed with error: " + exception.Message;
Debug.WriteLine(StatusText);
// Could retry, but for this simple example
// just close the socket.
closing = true;
clientSocket.Dispose();
clientSocket = null;
connected = false;
}
}
and my code in server side is like this (node.js)
var net = require('net');
var HOST = '127.0.0.1';
var PORT = 1337;
// Create a server instance, and chain the listen function to it
// The function passed to net.createServer() becomes the event handler for the 'connection' event
// The sock object the callback function receives UNIQUE for each connection
net.createServer(function (sock) {
// We have a connection - a socket object is assigned to the connection automatically
console.log('CONNECTED: ' + sock.remoteAddress + ':' + sock.remotePort);
sock.on('data', function (data) {
console.log(sock.name + "> " + data, sock);
});
// Add a 'close' event handler to this instance of socket
sock.on('close', function (data) {
console.log('CLOSED: ' + sock.remoteAddress + ' ' + sock.remotePort);
sock.end();
});
}).listen(PORT, HOST);
before, I changed the node.js code to
net.createServer(function (sock) {
console.log('CONNECTED: ' + sock.remoteAddress + ':' + sock.remotePort);
sock.write("Hello");
//});
The message "Hello" appear on my client side correctly
the problem is that when I add these lines, the code doesn't work anymore.
sock.on('data', function (data) {
console.log(sock.name + "> " + data, sock);
});
The message I sent is just a word of string.
It seems like the message doesn't go right in this.
sock.on('data', function (data) {} );
Is there anyway that I can make this thing work?
Thank you.
this is application Server side (Node Js):
var net = require('net');
var server = net.createServer(function(socket) { //Create the server and pass it the function which will write our data
console.log('CONNECTED: ' + socket.remoteAddress + ':' + socket.remotePort);
socket.write("Hello\n");
socket.write("World!\n");
//when to open the C # application write in the Desktop console "hello world"
socket.on('data', function (data) {
console.log(socket.name + "> " + data);
socket.write("Message from server to Desktop");
socket.end("End of communications.");
});
});
server.listen(3000); //This is the port number we're listening to
Into my C# Application I have write:
static void Main(string[] args)
{
TcpClient client = new TcpClient();
client.Connect("192.168.x.x", 3000); //Connect to the server on our local host IP address, listening to port 3000
NetworkStream clientStream = client.GetStream();
System.Threading.Thread.Sleep(1000); //Sleep before we get the data for 1 second
while (clientStream.DataAvailable)
{
byte[] inMessage = new byte[4096];
int bytesRead = 0;
try
{
bytesRead = clientStream.Read(inMessage, 0, 4096);
}
catch { /*Catch exceptions and handle them here*/ }
ASCIIEncoding encoder = new ASCIIEncoding();
Console.WriteLine(encoder.GetString(inMessage, 0, bytesRead));
}
//******************** SEND DATA **********************************
string message = "Send message from Desktop to Server NodeJs!";
Byte[] data = System.Text.Encoding.ASCII.GetBytes(message);
// Call StoreAsync method to store the data to a backing stream
NetworkStream stream = client.GetStream();
stream.Write(data, 0, data.Length);
Console.WriteLine("Sent: {0}", message);
// Buffer to store the response bytes.
data = new Byte[256];
// String to store the response ASCII representation.
String responseData = String.Empty;
// Read the first batch of the TcpServer response bytes.
Int32 bytes = stream.Read(data, 0, data.Length);
responseData = System.Text.Encoding.ASCII.GetString(data, 0, bytes);
Console.WriteLine("Received: {0}", responseData);
// Close everything.
stream.Close();
//*****************************************************************
client.Close();
System.Threading.Thread.Sleep(10000); //Sleep for 10 seconds
}
this is my my working solution