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@ -1,10 +1,10 @@ |
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## net |
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# net |
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The `net` module provides you with an asynchronous network wrapper. It contains |
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methods for creating both servers and clients (called streams). You can include |
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this module with `require('net');` |
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### net.createServer([options], [connectionListener]) |
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## net.createServer([options], [connectionListener]) |
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Creates a new TCP server. The `connectionListener` argument is |
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automatically set as a listener for the ['connection'](#event_connection_) |
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@ -49,8 +49,8 @@ Use `nc` to connect to a UNIX domain socket server: |
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nc -U /tmp/echo.sock |
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### net.connect(options, [cnnectionListener]) |
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### net.createConnection(options, [cnnectionListener]) |
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## net.connect(options, [cnnectionListener]) |
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## net.createConnection(options, [cnnectionListener]) |
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Constructs a new socket object and opens the socket to the given location. |
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When the socket is established, the ['connect'](#event_connect_) event will be |
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@ -97,29 +97,27 @@ changed to |
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var client = net.connect({path: '/tmp/echo.sock'}, |
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### net.connect(port, [host], [connectListener]) |
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### net.createConnection(port, [host], [connectListener]) |
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## net.connect(port, [host], [connectListener]) |
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## net.createConnection(port, [host], [connectListener]) |
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Creates a TCP connection to `port` on `host`. If `host` is omitted, |
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`'localhost'` will be assumed. |
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The `connectListener` parameter will be added as an listener for the |
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['connect'](#event_connect_) event. |
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### net.connect(path, [connectListener]) |
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### net.createConnection(path, [connectListener]) |
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## net.connect(path, [connectListener]) |
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## net.createConnection(path, [connectListener]) |
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Creates unix socket connection to `path`. |
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The `connectListener` parameter will be added as an listener for the |
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['connect'](#event_connect_) event. |
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--- |
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### net.Server |
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## Class: net.Server |
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This class is used to create a TCP or UNIX server. |
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A server is a `net.Socket` that can listen for new incoming connections. |
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#### server.listen(port, [host], [listeningListener]) |
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### server.listen(port, [host], [listeningListener]) |
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Begin accepting connections on the specified `port` and `host`. If the |
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`host` is omitted, the server will accept connections directed to any |
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@ -147,7 +145,7 @@ would be to wait a second and then try again. This can be done with |
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(Note: All sockets in Node set `SO_REUSEADDR` already) |
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#### server.listen(path, [listeningListener]) |
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### server.listen(path, [listeningListener]) |
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Start a UNIX socket server listening for connections on the given `path`. |
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@ -156,14 +154,14 @@ This function is asynchronous. When the server has been bound, |
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the last parameter `listeningListener` will be added as an listener for the |
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['listening'](#event_listening_) event. |
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#### server.close([cb]) |
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### server.close([cb]) |
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Stops the server from accepting new connections. This function is |
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asynchronous, the server is finally closed when the server emits a `'close'` |
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event. Optionally, you can pass a callback to listen for the `'close'` event. |
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#### server.address() |
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### server.address() |
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Returns the bound address and port of the server as reported by the operating system. |
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Useful to find which port was assigned when giving getting an OS-assigned address. |
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@ -183,54 +181,52 @@ Example: |
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Don't call `server.address()` until the `'listening'` event has been emitted. |
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#### server.maxConnections |
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### server.maxConnections |
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Set this property to reject connections when the server's connection count gets |
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high. |
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#### server.connections |
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### server.connections |
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The number of concurrent connections on the server. |
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`net.Server` is an `EventEmitter` with the following events: |
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#### Event: 'listening' |
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### Event: 'listening' |
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`function () {}` |
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Emitted when the server has been bound after calling `server.listen`. |
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#### Event: 'connection' |
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### Event: 'connection' |
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`function (socket) {}` |
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Emitted when a new connection is made. `socket` is an instance of |
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`net.Socket`. |
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#### Event: 'close' |
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### Event: 'close' |
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`function () {}` |
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Emitted when the server closes. |
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#### Event: 'error' |
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### Event: 'error' |
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`function (exception) {}` |
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Emitted when an error occurs. The `'close'` event will be called directly |
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following this event. See example in discussion of `server.listen`. |
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--- |
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### net.Socket |
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## Class: net.Socket |
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This object is an abstraction of a TCP or UNIX socket. `net.Socket` |
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instances implement a duplex Stream interface. They can be created by the |
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user and used as a client (with `connect()`) or they can be created by Node |
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and passed to the user through the `'connection'` event of a server. |
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#### new net.Socket([options]) |
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### new net.Socket([options]) |
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Construct a new socket object. |
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@ -245,8 +241,8 @@ Construct a new socket object. |
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specified underlying protocol. It can be `'tcp4'`, `'tcp6'`, or `'unix'`. |
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About `allowHalfOpen`, refer to `createServer()` and `'end'` event. |
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#### socket.connect(port, [host], [connectListener]) |
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#### socket.connect(path, [connectListener]) |
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### socket.connect(port, [host], [connectListener]) |
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### socket.connect(path, [connectListener]) |
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Opens the connection for a given socket. If `port` and `host` are given, |
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then the socket will be opened as a TCP socket, if `host` is omitted, |
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@ -266,7 +262,7 @@ The `connectListener` parameter will be added as an listener for the |
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['connect'](#event_connect_) event. |
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#### socket.bufferSize |
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### socket.bufferSize |
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`net.Socket` has the property that `socket.write()` always works. This is to |
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help users get up and running quickly. The computer cannot always keep up |
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@ -285,12 +281,12 @@ Users who experience large or growing `bufferSize` should attempt to |
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"throttle" the data flows in their program with `pause()` and `resume()`. |
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#### socket.setEncoding([encoding]) |
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### socket.setEncoding([encoding]) |
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Sets the encoding (either `'ascii'`, `'utf8'`, or `'base64'`) for data that is |
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received. Defaults to `null`. |
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#### socket.write(data, [encoding], [callback]) |
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### socket.write(data, [encoding], [callback]) |
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Sends data on the socket. The second parameter specifies the encoding in the |
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case of a string--it defaults to UTF8 encoding. |
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@ -302,7 +298,7 @@ buffer. Returns `false` if all or part of the data was queued in user memory. |
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The optional `callback` parameter will be executed when the data is finally |
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written out - this may not be immediately. |
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#### socket.end([data], [encoding]) |
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### socket.end([data], [encoding]) |
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Half-closes the socket. i.e., it sends a FIN packet. It is possible the |
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server will still send some data. |
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@ -310,21 +306,21 @@ server will still send some data. |
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If `data` is specified, it is equivalent to calling |
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`socket.write(data, encoding)` followed by `socket.end()`. |
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#### socket.destroy() |
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### socket.destroy() |
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Ensures that no more I/O activity happens on this socket. Only necessary in |
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case of errors (parse error or so). |
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#### socket.pause() |
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### socket.pause() |
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Pauses the reading of data. That is, `'data'` events will not be emitted. |
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Useful to throttle back an upload. |
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#### socket.resume() |
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### socket.resume() |
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Resumes reading after a call to `pause()`. |
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#### socket.setTimeout(timeout, [callback]) |
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### socket.setTimeout(timeout, [callback]) |
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Sets the socket to timeout after `timeout` milliseconds of inactivity on |
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the socket. By default `net.Socket` do not have a timeout. |
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@ -338,14 +334,14 @@ If `timeout` is 0, then the existing idle timeout is disabled. |
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The optional `callback` parameter will be added as a one time listener for the |
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`'timeout'` event. |
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#### socket.setNoDelay([noDelay]) |
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### socket.setNoDelay([noDelay]) |
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Disables the Nagle algorithm. By default TCP connections use the Nagle |
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algorithm, they buffer data before sending it off. Setting `true` for |
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`noDelay` will immediately fire off data each time `socket.write()` is called. |
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`noDelay` defaults to `true`. |
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#### socket.setKeepAlive([enable], [initialDelay]) |
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### socket.setKeepAlive([enable], [initialDelay]) |
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Enable/disable keep-alive functionality, and optionally set the initial |
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delay before the first keepalive probe is sent on an idle socket. |
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@ -356,41 +352,41 @@ data packet received and the first keepalive probe. Setting 0 for |
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initialDelay will leave the value unchanged from the default |
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(or previous) setting. Defaults to `0`. |
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#### socket.address() |
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### socket.address() |
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Returns the bound address and port of the socket as reported by the operating |
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system. Returns an object with two properties, e.g. |
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`{"address":"192.168.57.1", "port":62053}` |
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#### socket.remoteAddress |
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### socket.remoteAddress |
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The string representation of the remote IP address. For example, |
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`'74.125.127.100'` or `'2001:4860:a005::68'`. |
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#### socket.remotePort |
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### socket.remotePort |
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The numeric representation of the remote port. For example, |
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`80` or `21`. |
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#### socket.bytesRead |
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### socket.bytesRead |
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The amount of received bytes. |
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#### socket.bytesWritten |
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### socket.bytesWritten |
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The amount of bytes sent. |
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`net.Socket` instances are EventEmitters with the following events: |
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#### Event: 'connect' |
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### Event: 'connect' |
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`function () { }` |
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Emitted when a socket connection is successfully established. |
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See `connect()`. |
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#### Event: 'data' |
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### Event: 'data' |
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`function (data) { }` |
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@ -402,7 +398,7 @@ information.) |
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Note that the __data will be lost__ if there is no listener when a `Socket` |
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emits a `'data'` event. |
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#### Event: 'end' |
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### Event: 'end' |
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`function () { }` |
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@ -415,7 +411,7 @@ its side allowing the user to write arbitrary amounts of data, with the |
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caveat that the user is required to `end()` their side now. |
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#### Event: 'timeout' |
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### Event: 'timeout' |
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`function () { }` |
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@ -425,7 +421,7 @@ the socket has been idle. The user must manually close the connection. |
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See also: `socket.setTimeout()` |
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#### Event: 'drain' |
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### Event: 'drain' |
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`function () { }` |
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@ -433,36 +429,33 @@ Emitted when the write buffer becomes empty. Can be used to throttle uploads. |
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See also: the return values of `socket.write()` |
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#### Event: 'error' |
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### Event: 'error' |
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`function (exception) { }` |
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Emitted when an error occurs. The `'close'` event will be called directly |
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following this event. |
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#### Event: 'close' |
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### Event: 'close' |
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`function (had_error) { }` |
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Emitted once the socket is fully closed. The argument `had_error` is a boolean |
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which says if the socket was closed due to a transmission error. |
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--- |
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### net.isIP |
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#### net.isIP(input) |
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## net.isIP |
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## net.isIP(input) |
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Tests if input is an IP address. Returns 0 for invalid strings, |
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returns 4 for IP version 4 addresses, and returns 6 for IP version 6 addresses. |
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#### net.isIPv4(input) |
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## net.isIPv4(input) |
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Returns true if input is a version 4 IP address, otherwise returns false. |
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#### net.isIPv6(input) |
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## net.isIPv6(input) |
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Returns true if input is a version 6 IP address, otherwise returns false. |
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