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File System1 module is one of powerfull built-in module in NodeJS.
Syntax: fs.readFile( path[, options], callback )
Example:
fs.readFile( '/etc/passwd', function ( err, data ) {
if (err) throw err;
console.log(data);
} );
In this post, we will set content of html static into each html files and using readFile() method for read all of them.
Ok, let's begin:
create a file "home": public/home.html and write code such as:
<h1>Hello World in NodeJS HTTP</h1>
<p>NodeJS easy-to-learn</p>
create a file "about": public/about.html and write code such as:
<h1>About me</h1>
<p>I am developer</p>
<p>I love programming</p>
create a file "404": public/404.html and write code such as:
<h1>404</h1>
<p>Page not found</p>
After that, back to index.js and add File System module:
const fs = require('fs');
Inside if ( req.url == '/' ), replace
res.write( '<h1>Hello World in NodeJS HTTP</h1>' );
res.write( '<p>NodeJS easy-to-learn</p>' );
with
fs.readFile( './public/home.html', 'utf8', function ( err, data ) {
res.write( data );
res.end();
} );
Inside else if ( req.url == '/about'), replace
res.write( "<h1>About me</h1>" );
res.write( "<p>I am developer</p>" );
res.write( "<p>I love programming</p>" );
with
fs.readFile( './public/about.html', 'utf8', function ( err, data ) {
res.write( data );
res.end();
} );
Inside else, replace
res.write( "<h1>404</h1>" );
res.write( '<p>Page not found</p>' );
with
fs.readFile( './public/404.html', 'utf8', function ( err, data ) {
res.writeHead( 404, { 'Content-Type': 'text/html' } );
res.write( data );
res.end();
} );
Done.
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nodejs.org File System::readFile() on date 20 december 2019 and accessed from: https://nodejs.org/docs/latest-v10.x/api/fs.html#fs_fs_readfile_path_options_callback ↩
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