Rewrote the server with express

Author: Andrey

index.js

@@ -1,68 +1,39 @@
-const http = require('http');
-const url = require('url');
+const express = require('express');
 const fs = require('fs');
 const path = require('path');
 const mimeType = require('./modules/mimeType');
 const port = 9000;
 
-http
-  .createServer(function (req, res) {
-    console.log(`${req.method} ${req.url}`);
-
-    // parse URL
-    const parsedUrl = url.parse(req.url);
-    const sanitizePath = path
-      .normalize(parsedUrl.pathname)
-      .replace(/^(\.\.[\/\\])+/, '');
-    let pathname = path.join(__dirname, sanitizePath);
-
-    fs.exists(pathname, function (exist) {
-      if (!exist) {
-        // if the file is not found, return 404
-        res.statusCode = 404;
-        res.end(`File ${pathname} not found!`);
-        return;
-      }
-
-      // if is a directory return the list of files
-      if (fs.statSync(pathname).isDirectory()) {
-        fs.readdir(pathname, function (err, files) {
-          //handling error
-          if (err) {
-            return console.log('Unable to scan directory: ' + err);
-          }
-
-          var index = pathname.lastIndexOf('/');
-          var reqPath = pathname.substring(index + 1);
-
-          if (reqPath === 'files') {
-            res.setHeader('Content-type', mimeType['.json'])
-            res.end(JSON.stringify(files));
-          } else {
-            res.writeHead(404, {
-              'Content-type': 'text/html'
-            });
-            res.end(`<h1>Incorrect Request</h1>`);
-          }
-          
-        });
-      }
-
-      // read file from file system
-      fs.readFile(pathname, function (err, data) {
-        if (err) {
-          res.statusCode = 500;
-          res.end(`Error getting the file: ${err}.`);
-        } else {
-          // based on the URL path, extract the file extention. e.g. .js, .doc, ...
-          const ext = path.parse(pathname).ext;
-          // if the file is found, set Content-type and send data
-          res.setHeader('Content-type', mimeType[ext] || 'text/plain');
-          res.end(data);
-        }
-      });
-    });
-  })
-  .listen(parseInt(port));
-
-console.log(`Server listening on port ${port}`);
+const app = express();
+
+app.get('/files', (req, res) => {
+  fs.readdir('./files', function (err, files) {
+    if (err) {
+      return console.log('Unable to scan directory: ' + err);
+    }
+    res.setHeader('Content-type', mimeType['.json']);
+    res.end(JSON.stringify(files));
+  });
+});
+
+app.get('/files/:fileName', (req, res) => {
+  const pathname = `./files/${req.params.fileName}`;
+  fs.readFile(pathname, function (err, data) {
+    if (err) {
+      res.statusCode = 500;
+      res.end(`Error getting the file: ${err}.`);
+    } else {
+      // based on the URL path, extract the file extention. e.g. .js, .doc, ...
+      const ext = path.parse(pathname).ext;
+      // if the file is found, set Content-type and send data
+      res.setHeader('Content-type', mimeType[ext] || 'text/plain');
+      res.end(data);
+    }
+  });
+});
+
+app.listen(port, () =>
+  console.log(
+    `nodejs-convert-file-server listening at http://localhost:${port}`,
+  ),
+);