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not getting the values passed by the socket.io client


not getting the values passed by the socket.io client

By : ryan.mcmanus
Date : November 22 2020, 10:31 AM
To fix the issue you can do I am stuck at the get-started part of socket.io tutorial, on emitting events. Before that, I did get the user connected and user disconnected in the console. However, in the emitting part, I don't get any message passed by the socket.io client in the console. , You're missing a line in your index.js
Instead of:
code :
io.on('connection', function(socket){
  socket.on('chat message', function(msg){
    console.log('message: ' + msg);
  });
});
io.on('connection', function(socket){
  socket.on('chat message', function(msg){
    console.log('message: ' + msg);
    io.emit('chat message', msg);
  });
});
<!doctype html>
<html>
  <head>
    <title>Socket.IO chat</title>
    <style>
      * { margin: 0; padding: 0; box-sizing: border-box; }
      body { font: 13px Helvetica, Arial; }
      form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
      form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
      form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
      #messages { list-style-type: none; margin: 0; padding: 0; }
      #messages li { padding: 5px 10px; }
      #messages li:nth-child(odd) { background: #eee; }
    </style>

  </head>
  <body>
    <ul id="messages"></ul>
    <form action="">
      <input id="m" autocomplete="off" /><button>Send</button>
    </form>
  </body>

  <script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
  <script src="http://code.jquery.com/jquery-1.11.1.js"></script>
  <script>
    var socket = io();
    $('form').submit(function(){
      socket.emit('chat message', $('#m').val());
      $('#m').val('');
      return false;
    });
   socket.on('chat message', function(msg){
      $('#messages').append($('<li>').text(msg));
    });
  </script>
</html>


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Correct variable on server gets passed as an incorrect variable to client via socket.io

Correct variable on server gets passed as an incorrect variable to client via socket.io


By : phreyliam
Date : March 29 2020, 07:55 AM
hop of those help? Socket.io doesn't just send strings, it sends pretty much any javascript value, functions included. You can send a callback along with your data.
client:
code :
saveSnail: function(snail) {
    // Core stats
    var data = {};
    data.ownerID = ig.game.sessionUserID;
    data.inDb = true;
    data.name = snail.name;
    // etc..

    console.log('saving snail');
    this.socket.emit("savesnail", data, function (err, snailid) {
      if (err) {
        return console.error(err);
      }
      snail.snailID = snailid;
      console.log('snail ID set: ' + snailid);
    });
}
client.on('savesnail', function (data, cb) {
    console.log('save snail: ' + data.name);
    var snail = new Snail(data);
    snail.save(function (err, snail) {
        if (err) {return cb(err);} // Let the client handle the err
        var snailID = snail._id;
        console.log('saved snail ID ' + snailID);
        var conditions = {_id: data.ownerID},
            update = {$set: {newUser: false}}

        User.update(conditions,update,function(err){});
        console.log('user updated');
        cb(null, snailID);
    });
});
socket.io send data to client based on id passed by client

socket.io send data to client based on id passed by client


By : Michael Alfonso
Date : March 29 2020, 07:55 AM
wish helps you If you really want to do it this way, I would suggest generating the ID via the initial start call, then passing that to the long running process as an argument. Then that process publishes all messages to that ID (which appropriate clients are listening to as well).
However, I would discourage you from going from this approach. There are plenty of ways to go about handling a child process in Node, so you might want to look into these options a little more so you don't end up dealing with zombie processes all over the place.
C server to Java client socket read passed in short value

C server to Java client socket read passed in short value


By : user3429764
Date : March 29 2020, 07:55 AM
will help you You're receiving binary, so you shouldn't be using a Reader at all. You should be using DataInputStream.readShort(). That is correct. No.
Are socket.io values in the form `socket.variable = data` accesible to the client?

Are socket.io values in the form `socket.variable = data` accesible to the client?


By : Trending youtube vid
Date : March 29 2020, 07:55 AM
it fixes the issue The socket.io socket object is a completely different object on client and server. While they each represent opposite ends of the same TCP connection, they are completely different objects in completely different JS engines (actually, either end can be run in many different languages).
So, a custom property you set on one is not reflected in the other in any way. Server properties stay private to the server-side socket object and client properties stay private to the client-side socket object. Once the connection is initialized, the only data of yours that is sent back and forth is data that you explicitly .emit() to the other end of the socket.
Getting no values or garbage values on the client-side (TCP Socket Programming in C)

Getting no values or garbage values on the client-side (TCP Socket Programming in C)


By : user3582080
Date : March 29 2020, 07:55 AM
like below fixes the issue Your server is sending back a 90 byte buffer while your client is reading into a 50 byte buffer. This means that the client first reads 50 bytes which starts with the expected string. Then on the next call to recv the next 40 bytes from the same message are read which most likely contain garbage. This call probably also contains the first 10 bytes of the next message at the end.
The simplest fix for this is to change both send calls to send strlen(buf)+1 bytes instead of sizeof(buf) bytes so you're only sending exactly as much data as you need.
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