我想寫一個快速和骯髒的tcp服務器,並與分隔符有問題。每this question我緩衝輸入數據並尋找分隔符(在這種情況下,「\ r \ n」。然而,當我在Telnet和發送消息node.js緩衝tcp數據和分隔符
foo\r\nbar
以下服務器無法識別的分隔符中間,但在最後看到一個\ r \ n - 我在印象之下telnet只發送一個\ n當我通過ruby腳本發送消息時,任何地方都不會識別分隔符,即使存在\ r \ n也是如此在該消息。
是有一些JS字符串處理的行爲,我需要被awared的?
var net = require("net");
var http = require('http');
var HOST = '127.0.0.1';
var PORT = 6969;
var TCP_DELIMITER = '\r\n';
var TCP_BUFFER_SIZE = Math.pow(2,16);
net.createServer(function(sock) {
console.log('CONNECTED: ' + sock.remoteAddress +':'+ sock.remotePort);
// To buffer tcp data see:
// https://stackoverflow.com/questions/7034537/nodejs-what-is-the-proper-way-to-handling-tcp-socket-streams-which-delimiter
buf = new Buffer(TCP_BUFFER_SIZE); //new buffer with size 2^16
processTCP = function(msg) {
// process messages
console.log("processTCP: "+msg);
}
// socket handlers
sock.on('data', function(data) {
// look for separator '\r\n'
console.log("data='"+data+"'");
data = data.toString('utf-8');
if(data.indexOf(TCP_DELIMITER) == -1) {
console.log("1 PART MSG, INCOMING");
buf.write(data.toString()); // write data to buffer
} else {
parts = data.toString().split(TCP_DELIMITER);
console.log("Parts: "+parts);
if (parts.length == 2) {
console.log("2 PART MSG, INCOMING");
msg = buf.toString() + parts[0]; // and do something with message
processTCP(msg);
buf = (new Buffer(TCP_BUFFER_SIZE)).write(parts[1]); // write new, incomplete data to buffer
} else {
console.log(parts.length+" PART MSG, INCOMING");
msg = buf.toString() + parts[0];
processTCP(msg);
for (var i = 1; i <= parts.length -1; i++) {
if (i !== parts.length-1) {
msg = parts[i];
processTCP(msg);
} else {
buf.write(parts[i]);
}
}
}
}
console.log('DATA ' + sock.remoteAddress + ': ' + data);
// Write the data back to the socket, the client will receive it as data from the server
sock.write('You said "' + data + '"');
});
sock.on('close', function(data) {
console.log('CLOSED: ' + sock.remoteAddress +' '+ sock.remotePort);
});
}).listen(PORT, HOST);
console.log('Server listening on ' + HOST +':'+ PORT);