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webserver.js
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webserver.js
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'use strict';
const http = require('http');
const url = require('url');
const fs = require('fs');
const path = require('path');
let mimes = {
'.html': 'text/html',
'.css': 'text/css',
'.js': 'text/javascript',
'.gif': 'image/gif',
'.jpg': 'image/jpeg',
'.png': 'image/png'
}
function fileAccess(filePath) {
return new Promise((resolve, reject) => {
fs.access(filePath, fs.F_OK, error => {
if (!error) {
resolve(filePath);
} else {
reject(error);
}
});
});
}
function streamFile(filePath) {
return new Promise((resolve, reject) => {
let fileStream = fs.createReadStream(filePath);
fileStream.on('open', () => {
resolve(fileStream);
});
fileStream.on('error', error => {
reject(error);
})
});
}
function webserver(req, res) {
let baseURI = url.parse(req.url);
//load index.html if the requested route is '/' else load the requested files
let filePath = __dirname + (baseURI.pathname === '/' ? '/index.html' : baseURI.pathname);
let contentType = mimes[path.extname(filePath)];
fileAccess(filePath)
.then(streamFile)
.then(fileStream => {
res.writeHead(200, { 'Content-type': contentType });
// res.end(content, 'utf-8');
fileStream.pipe(res);
})
.catch(error => {
res.writeHead(404);
res.end(JSON.stringify(error));
})
}
http.createServer(webserver).listen(8081, () => console.log('webserver running on port 8081')
);