File-server NPM

file-server

Simple http file server that supports files and directories

Example

const FileServer = require('file-server');

const fileServer = new FileServer((error, request, response) => {
    response.statusCode = error.code || 500;
    response.end(error);
});

const serveRobots = fileServer.serveFile('./robots.txt', 'text/plain');

require('http')
    .createServer(serveRobots)
    .listen(8080);

new FileServer(errorCallback, cacheSize)

The FileServer constructor takes 2 arguments errorCallback and an optional cacheSize (bytes).

The callback gets 3 arguments (error, request, response)

cacheSize defaults to 1024 * 1000

If the error argument was the result of a missing file the error will have a code of 404. Other codes may be added in the future.

const FileServer = require('file-server');

const fileServer = new FileServer((error, request, response) => {
    response.statusCode = error.code || 500;
    response.end(error);
});

fileServer.serveFile(fileName, mimeType, maxAge)

The serveFile method takes 3 arguments fileName, mimeType and an optional maxAge.

fileName is the name of the file to serve.

mimeType is a string, defining which mime type should be used.

maxAge will defaults to 0 (rely on ETags)

This will return a function that takes a request and a response and will stream the file to the response, or in the case of an error, call the error callback passed in at construction.

const serveRobots = fileServer.serveFile('./robots.txt', 'text/plain');

serveRobots(request, response);

fileServer.serveDirectory(rootDirectory, mimeTypes, maxAge)

The serveDirectory method takes 3 arguments rootDirectory, mimeTypes and an optional maxAge.

rootDirectory is the base directory to serve files from. If a file above this directory is asked for the request will error with a 404.

mimeTypes is an object keyed by extension, defining which mime type should be used for the extension. If a file is asked for with an extension that is not defined the request will error with a 404.

maxAge will defaults to 0 (rely on ETags)

This will return a function that takes a request, response and a filename and will stream the file to the response, or in the case of an error, call the error callback passed in at construction.

const serveImagesDirectory = fileServer.serveDirectory('./images', {
    '.gif': 'image/gif',
    '.png': 'image/png',
    '.jpg': 'image/jpeg',
});

serveImagesDirectory(request, response, request.url);

If the fileName argument is ommited, the filename will be automatically pulled from request.url

serveImagesDirectory(request, response);

Closing connections

File server automically closes any watchers on files or directories during process end. If you have a need for stopping and starting tha file server throughout a process (i.e. using jest), you may also programmatically close all open file watchers on the server 'close' event.

const fileServer = new FileServer((error, request, response) => {
    response.statusCode = error.code || 500;
    response.end(error);
});

// Your file serving setup

require('http')
    .createServer(fileServer.serveDirectory('./images', {
        '.gif': 'image/gif',
        '.png': 'image/png',
        '.jpg': 'image/jpeg',
    }))
    .listen(8080)
    .on('close', () => {
        fileServer.close(() => {
            console.log('We have closed all file server connections');
        });
    });