In this example, we write an HTTPS daemon process using an SSL server socket that returns an HTML stream when a browser connects to it. This example also shows how to generate a machine certificate in a special keystore to support the SSL deployment.
In Java programming, the only thing that needs to be done is to use an SSL Server Socket Factory instead of a Socket Factory, using lines like the following:
SSLServerSocketFacctory sslf =
(SSLServerSocketFactor)SSLServerSocketFactory.getDefault();
ServerSocket serverSocket = sslf.createServerSocket(PORT);
The complete code example is listed below:
import java.io.*;
import java.net.*;
import javax.net.ssl.*;
//
// Example of an HTTPS server to illustrate SSL certificate and socket
public class HTTPSServerExample {
public static void main(String[] args) throws IOException {
//
// create an SSL socket using the factory and pick port 8080
SSLServerSocketFactory sslsf =
(SSLServerSocketFactory)SSLServerSocketFactory.getDefault();
ServerSocket ss = sslsf.createServerSocket(8080);
//
// loop forever
while (true) {
try {
//
// block waiting for client connection
Socket s = ss.accept();
System.out.println( "Client connection made" );
// get client request
BufferedReader in = new BufferedReader(
new InputStreamReader(s.getInputStream()));
System.out.println(in.readLine());
//
// make an HTML response
PrintWriter out = new PrintWriter( s.getOutputStream() );
out.println("<HTML><HEAD><TITLE>HTTPS Server Example</TITLE>" +
"</HEAD><BODY><H1>Hello World!</H1></BODY></HTML>\n");
//
// Close the stream and socket
out.close();
s.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
