Я не могу понять, как отправить байтовый массив при подключении к серверу на Debian. Есть ли альтернатива отправке строки через client.write()
? Я попробовал client.write(new Buffer("something"))
, но это дает ошибку Invalid data
. Вот мой код:
var net = require('net');
function ModernBuffer(buffer) { // custom buffer class
this.buffer = new ArrayBuffer(buffer.length);
this.byteLength = this.buffer.byteLength;
console.log('ModernBuffer.ByteLength: ' + this.byteLength);
var Uint16View = new Uint16Array(this.buffer, 0, 1);
for (var i=0; i<Uint16View.length; i++) {
Uint16View[i] = buffer[i];
console.log("Entry " + i + ": " + Uint16View[i]);
}
}
var client = net.connect({ host: 'someIp.pl', port: 7171 }, function () { // this IP is not important until I figure out how to send correct bytes
console.log('Server: connected');
var bytes = Array(6); // array of bytes to be send
bytes[0] = 0x4;
bytes[1] = 0x0;
bytes[2] = 0xFF;
bytes[3] = 0x01;
bytes[4] = 0x20;
bytes[5] = 0x0;
function ab2str(buf) { // First ArrayBuffer to string function...(gives me 4 bytes instead of 6 at the end
return String.fromCharCode.apply(null, new Int8Array(buf));
}
function strFromUtf8Ab(ab) { // that gives me 0 bytes!
return decodeURIComponent(escape(String.fromCharCode.apply(null, ab)));
}
sendBuffer = new ArrayBuffer(6);
intView8 = new Int8Array(sendBuffer);
var str = "";
for(var i = 0; i < intView8.length; i++) {
intView8[i] = bytes[i];
console.log("Intview length: " + intView8.length + " | Entry [" + i + "]: " + intView8[i]);
}
//var sendMsg = ab2str(sendBuffer); 4 bytes instead of 6...
//var sendMsg = strFromUtf8Ab(sendBuffer); 0 bytes instead of 6...
var binaryString = '';
var bytes = Array(6);
bytes[0] = 0x4;
bytes[1] = 0x0;
bytes[2] = 0xFF;
bytes[3] = 0x01;
bytes[4] = 0x20;
bytes[5] = 0x0;
var length = bytes.length;
// another try to convert bytes to string - gives me 7 instead of 6 and they are bad
for (var i = 0; i < length; i++) {
binaryString += String.fromCharCode(bytes[i]);
}
sendMsg = binaryString;
// test final string which is sent
t=[];
for(s=unescape(encodeURI(sendMsg)),i=0;i<s.length;++i)
t.push(s.charCodeAt(i));
console.log(t);
// end
client.write(sendMsg); // not important until I figure out how to send correct bytes
var server = net.createServer(function(c) { // test server to send bytes to test-client
console.log('server connected');
c.on('end', function() {
console.log('server disconnected');
});
c.write(sendMsg); // send bytes converted to string
});
server.listen(7654, function() {
console.log('server bound');
});
});
client.on('data', function(data) {
console.log('----- NEW -----');
modernBuffer = new ModernBuffer(data);
});
client.on('timeout', function () {
console.log('Server: timeout');
});
client.on('error', function(error) {
console.log('Server: error: ' + error);
});
client.on('end', function() {
console.log('Server: client disconnected');
});
Я также запускаю клиент в Windows с тем же кодом, кроме части createServer.
Вывод:
Debian:
[email protected]:/home/kuzi/node# node app.js
Server słucha.
Server: connected
Intview length: 6 | Entry [0]: 4
Intview length: 6 | Entry [1]: 0
Intview length: 6 | Entry [2]: -1
Intview length: 6 | Entry [3]: 1
Intview length: 6 | Entry [4]: 32
Intview length: 6 | Entry [5]: 0
[ 4, 0, 195, 191, 1, 32, 0 ] <= final bytes instead of those /\ UP
server bound
Server: client disconnected
server connected
Окна:
C:\Users\Daniel>node app.js
Server słucha.
Server: connected
Intview length: 6 | Entry [0]: 4
Intview length: 6 | Entry [1]: 0
Intview length: 6 | Entry [2]: -1
Intview length: 6 | Entry [3]: 1
Intview length: 6 | Entry [4]: 32
Intview length: 6 | Entry [5]: 0
[ 4, 199, 191, 32 ] <= I'm showing only first 4 bytes but...
----- NEW -----
ModernBuffer.ByteLength: 7 <= you can see it 7 instead of 6 and they are bad so I'm sure it wrong
4, 0, 195, 191
Entry 0: 4
Помощь будет принята с благодарностью.