About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

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HTTP Server

HTTP server.

Installation

npm install @stdlib/net-http-server

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

var httpServer = require( '@stdlib/net-http-server' );

httpServer( [options,] [ requestListener] )

Returns a function to create an HTTP server.

var createServer = httpServer();

To bind a request callback to a server, provide a requestListener.

function requestListener( request, response ) {
    console.log( request.url );
    response.end( 'OK' );
}

var createServer = httpServer( requestListener );

The function accepts the following options:

• port: server port. Default: 0 (i.e., randomly assigned).
• maxport: max server port when port hunting. Default: maxport=port.
• hostname: server hostname.
• address: server address. Default: 127.0.0.1.

To specify server options, provide an options object.

var opts = {
    'port': 7331,
    'address': '0.0.0.0'
};

var createServer = httpServer( opts );

To specify a range of permissible ports, set the maxport option.

var opts = {
    'maxport': 9999
};

var createServer = httpServer( opts );

When provided a maxport option, a created server will search for the first available port on which to listen, starting from port.

createServer( done )

Creates an HTTP server.

function done( error, server ) {
    if ( error ) {
        throw error;
    }
    console.log( 'Success!' );
    server.close();
}

var createServer = httpServer();

createServer( done );

Notes

• Port hunting can be useful in a microservice deployment. When a port is randomly assigned (options.port=0), if a server fails and is restarted, the server is unlikely to bind to its previous port. By allowing a constrained search, assuming no lower ports within a specified range have freed up in the meantime, the likelihood of listening on the same port is increased. A server can typically restart and bind to the same port faster than binding to a new port and re-registering with a microservice registry, thus minimizing possible service interruption and downtime.

Examples

var proc = require( 'process' );
var http = require( 'http' );
var httpServer = require( '@stdlib/net-http-server' );

function done( error, server ) {
    if ( error ) {
        throw error;
    }
    http.get( 'http://127.0.0.1:7331/beep/boop', onResponse );
}

function onResponse() {
    console.log( 'Success!' );
    proc.exit( 0 );
}

function onRequest( request, response ) {
    console.log( request.url );
    response.end( 'OK' );
}

// Specify server options...
var opts = {
    'port': 7331,
    'maxport': 9999,
    'hostname': 'localhost'
};

// Create a function for creating an HTTP server...
var createServer = httpServer( opts, onRequest );

// Create a server:
createServer( done );

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Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.