package node; /** > Stability: 2 - Stable The `node:net` module provides an asynchronous network API for creating stream-based TCP or `IPC` servers ({@link createServer}) and clients ({@link createConnection}). It can be accessed using: ```js const net = require('node:net'); ``` **/ @:jsRequire("net") @valueModuleOnly extern class Net { /** Creates a new TCP or `IPC` server. If `allowHalfOpen` is set to `true`, when the other end of the socket signals the end of transmission, the server will only send back the end of transmission when `socket.end()` is explicitly called. For example, in the context of TCP, when a FIN packed is received, a FIN packed is sent back only when `socket.end()` is explicitly called. Until then the connection is half-closed (non-readable but still writable). See `'end'` event and [RFC 1122](https://tools.ietf.org/html/rfc1122) (section 4.2.2.13) for more information. If `pauseOnConnect` is set to `true`, then the socket associated with each incoming connection will be paused, and no data will be read from its handle. This allows connections to be passed between processes without any data being read by the original process. To begin reading data from a paused socket, call `socket.resume()`. The server can be a TCP server or an `IPC` server, depending on what it `listen()` to. Here is an example of a TCP echo server which listens for connections on port 8124: ```js const net = require('node:net'); const server = net.createServer((c) => { // 'connection' listener. console.log('client connected'); c.on('end', () => { console.log('client disconnected'); }); c.write('hello\r\n'); c.pipe(c); }); server.on('error', (err) => { throw err; }); server.listen(8124, () => { console.log('server bound'); }); ``` Test this by using `telnet`: ```bash telnet localhost 8124 ``` To listen on the socket `/tmp/echo.sock`: ```js server.listen('/tmp/echo.sock', () => { console.log('server bound'); }); ``` Use `nc` to connect to a Unix domain socket server: ```bash nc -U /tmp/echo.sock ``` **/ @:overload(function(?options:node.net.ServerOpts, ?connectionListener:(socket:node.net.Socket) -> Void):node.net.Server { }) static function createServer(?connectionListener:(socket:node.net.Socket) -> Void):node.net.Server; /** Aliases to {@link createConnection}. Possible signatures: * {@link connect} * {@link connect} for `IPC` connections. * {@link connect} for TCP connections. **/ @:overload(function(port:Float, ?host:String, ?connectionListener:() -> Void):node.net.Socket { }) @:overload(function(path:String, ?connectionListener:() -> Void):node.net.Socket { }) static function connect(options:node.net.NetConnectOpts, ?connectionListener:() -> Void):node.net.Socket; /** A factory function, which creates a new {@link Socket}, immediately initiates connection with `socket.connect()`, then returns the `net.Socket` that starts the connection. When the connection is established, a `'connect'` event will be emitted on the returned socket. The last parameter `connectListener`, if supplied, will be added as a listener for the `'connect'` event **once**. Possible signatures: * {@link createConnection} * {@link createConnection} for `IPC` connections. * {@link createConnection} for TCP connections. The {@link connect} function is an alias to this function. **/ @:overload(function(port:Float, ?host:String, ?connectionListener:() -> Void):node.net.Socket { }) @:overload(function(path:String, ?connectionListener:() -> Void):node.net.Socket { }) static function createConnection(options:node.net.NetConnectOpts, ?connectionListener:() -> Void):node.net.Socket; /** Returns `6` if `input` is an IPv6 address. Returns `4` if `input` is an IPv4 address in [dot-decimal notation](https://en.wikipedia.org/wiki/Dot-decimal_notation) with no leading zeroes. Otherwise, returns`0`. ```js net.isIP('::1'); // returns 6 net.isIP('127.0.0.1'); // returns 4 net.isIP('127.000.000.001'); // returns 0 net.isIP('127.0.0.1/24'); // returns 0 net.isIP('fhqwhgads'); // returns 0 ``` **/ static function isIP(input:String):Float; /** Returns `true` if `input` is an IPv4 address in [dot-decimal notation](https://en.wikipedia.org/wiki/Dot-decimal_notation) with no leading zeroes. Otherwise, returns `false`. ```js net.isIPv4('127.0.0.1'); // returns true net.isIPv4('127.000.000.001'); // returns false net.isIPv4('127.0.0.1/24'); // returns false net.isIPv4('fhqwhgads'); // returns false ``` **/ static function isIPv4(input:String):Bool; /** Returns `true` if `input` is an IPv6 address. Otherwise, returns `false`. ```js net.isIPv6('::1'); // returns true net.isIPv6('fhqwhgads'); // returns false ``` **/ static function isIPv6(input:String):Bool; }