A minimal Http Server in Java

Recently, I wrote an spike, implementing a minimal Http Server in Java. It’s naive, and it don’t implement all the protocol: only the minimal GET.

The code:

package com.ajlopez;
import java.io.*;
import java.net.*;
public class HttpServer {
    public static void main(String[] args) {
	int port;
	ServerSocket serversocket;
	port = Integer.parseInt(args[0]);
	String rootpath = args[1];
	try {
		serversocket = new ServerSocket(port);
	} catch (IOException e) {
	while (true) {
	    try {
		Socket socket = serversocket.accept();
		BufferedReader reader = new BufferedReader(
                          new InputStreamReader(socket.getInputStream()));
		String line = reader.readLine();
		String [] words = line.split(" ");
		InputStream stream = new FileInputStream(rootpath + words[1]);
		OutputStream output = socket.getOutputStream();
		byte [] buffer = new byte[4096];
		int nbytes;
		while ((nbytes = stream.read(buffer))!=-1)
	    } catch (IOException e) {

It receives two arguments: the port and the root directory. You can try

java com.ajlopez.HttpServer 10000 c:\apache-tomcat-6.0.18\webapps\docs

and enter


(don’t forget the index.html) and you get:

It’s toy code, but it works 😉

You can get it from pastie:


or download from my AjCodeKatas google code:


I could improve it: separate concerns, add multithreading, etc.

Keep tuned!

Angel “Java” Lopez



8 thoughts on “A minimal Http Server in Java

  1. Pingback: A Minimal Http Server in C# « Angel “Java” Lopez on Blog

  2. Pingback: PythonSharp (1) A minimal Web Server « Angel ”Java” Lopez on Blog

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