MiniHttpServer.java - an HTTP Server in 168 lines

For part of an project which I'll be announcing shortly, I needed an extremely lightweight HTTP server. Fortunately, HTTP is quite easy-to-implement. Tonight I hacked together MiniHttpServer.java, a simple server with zero third-party dependencies.

I was able to support the core of HTTP in with just 168 lines by doing only the bare-minimum. Here's the server's core:

        nextLine();
        readUntil("GET\\s+");
        String url = readUntil("\\s+HTTP/1.1");

        do {
          nextLine();
        } while (readUntil("$").length() > 0);

        InputStream responseData = handler.getResponse(url);
        if (responseData != null) {
          write("HTTP/1.1 200 OK\r\n\r\n");
          int b;
          while ((b = responseData.read()) != -1) {
            connection.getOutputStream().write(b);
          }

        } else {
          write("HTTP/1.1 404 Not Found\r\n\r\n");
          write("404 Not Found: " + url);

        }

        connection.close();

If you need an embedded HTTP server, please help yourself to this code. It's fully open source, and available under your choice of Mozilla 1.1 or LGPL license.