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test-server.cjs
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test-server.cjs
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// Launch a simple web server in the test folder, so that the user can
// point to it with their browser.
// This code was taken from a StackOverflow question.
// https://stackoverflow.com/questions/16333790/node-js-quick-file-server-static-files-over-http
// Thank you!
const http = require( 'http' )
const url = require( 'url' )
const fs = require( 'fs' )
const path = require( 'path' )
// Options
const verbose = false
const port = 8080
// Create the server:
const server = http.createServer( ( req, res ) => {
const parsedUrl = url.parse( req.url )
let pathname = `.${parsedUrl.pathname}`
const ext = path.parse( pathname ).ext
const extensionToMime = {
'.ico' : 'image/x-icon',
'.html' : 'text/html',
'.js' : 'text/javascript',
'.json' : 'application/json',
'.css' : 'text/css',
'.png' : 'image/png',
'.jpg' : 'image/jpeg',
'.wav' : 'audio/wav',
'.mp3' : 'audio/mpeg',
'.svg' : 'image/svg+xml',
'.pdf' : 'application/pdf',
'.doc' : 'application/msword'
};
fs.exists( pathname, exist => {
// if no such file
if( !exist ) {
if ( verbose )
console.log( `Request: ${req.url} Response: 404` )
res.statusCode = 404
res.end( `File ${pathname} not found!` )
return
}
// if directory search for index file matching the extention
if ( fs.statSync( pathname ).isDirectory() )
pathname += '/index' + ext
// read file from file system
fs.readFile( pathname, ( err, data ) => {
if ( err ) {
// error getting file
if ( verbose )
console.log( `Request: ${req.url} Response: 500` )
res.statusCode = 500
res.end( `Error getting the file: ${err}.` )
} else {
// found; send type and data
if ( verbose )
console.log( `Request: ${req.url} Response: ${extensionToMime[ext]}` )
res.setHeader( 'Content-type', extensionToMime[ext] || 'text/plain' )
res.end( data )
}
} )
} )
} )
// Start the server, or give a useful error if you can't:
server.on( 'error', err => {
if ( /address already in use/.test( `${err}` ) ) {
console.log( `
Cannot launch test server in which to run unit tests:
A test server is already running on port ${port}.
Perhaps you have one running in another terminal?
` )
process.exit()
} else {
throw err
}
} )
server.listen( port )
if ( verbose )
console.log( `Listening on port ${port}` )
// Print success message, which also gives a link to view the tests.
console.log( `
+----------------------------------------------------+
| |
| Server started. Go here to view tests: |
| |
| http://localhost:8080/tests.html |
| |
+----------------------------------------------------+
` )