Java Tutorial/Network/Authenticator

Authenticator

   <source lang="java">

import java.io.BufferedInputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.io.Reader; import java.net.Authenticator; import java.net.PasswordAuthentication; import java.net.URL; public class MainClass {

 public static void main(String args[]) throws Exception {
   Authenticator.setDefault(new DialogAuthenticator());
   URL u = new URL("secure url");
   InputStream in = u.openStream();
   in = new BufferedInputStream(in);
   Reader r = new InputStreamReader(in);
   int c;
   while ((c = r.read()) != -1) {
     System.out.print((char) c);
   }
 }

} class DialogAuthenticator extends Authenticator {

 public DialogAuthenticator() {
 }
 public PasswordAuthentication getPasswordAuthentication() {
   return new PasswordAuthentication("username", "password".toCharArray());
 }

}</source>

Authenticator.setDefault(new Authenticator());

   <source lang="java">

import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.Authenticator; import java.net.InetAddress; import java.net.PasswordAuthentication; import java.net.URL; public class Main {

 public static void main(String[] argv) throws Exception {
   Authenticator.setDefault(new MyAuthenticator());
   URL url = new URL("http://hostname:80/index.html");
   BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
   String str;
   while ((str = in.readLine()) != null) {
     System.out.println(str);
   }
   in.close();
 }

} class MyAuthenticator extends Authenticator {

 protected PasswordAuthentication getPasswordAuthentication() {
   String promptString = getRequestingPrompt();
   System.out.println(promptString);
   String hostname = getRequestingHost();
   System.out.println(hostname);
   InetAddress ipaddr = getRequestingSite();
   System.out.println(ipaddr);
   int port = getRequestingPort();
   String username = "name";
   String password = "password";
   return new PasswordAuthentication(username, password.toCharArray());
 }

}</source>

InetAddress java.net.Authenticator.getRequestingSite()

   <source lang="java">

import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.Authenticator; import java.net.InetAddress; import java.net.PasswordAuthentication; import java.net.URL; public class Main {

 public static void main(String[] argv) throws Exception {
   Authenticator.setDefault(new MyAuthenticator());
   URL url = new URL("http://hostname:80/index.html");
   BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
   String str;
   while ((str = in.readLine()) != null) {
     System.out.println(str);
   }
   in.close();
 }

} class MyAuthenticator extends Authenticator {

 protected PasswordAuthentication getPasswordAuthentication() {
   String promptString = getRequestingPrompt();
   System.out.println(promptString);
   String hostname = getRequestingHost();
   System.out.println(hostname);
   InetAddress ipaddr = getRequestingSite();
   System.out.println(ipaddr);
   int port = getRequestingPort();
   String username = "name";
   String password = "password";
   return new PasswordAuthentication(username, password.toCharArray());
 }

}</source>

int java.net.Authenticator.getRequestingPort()

   <source lang="java">

import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.Authenticator; import java.net.InetAddress; import java.net.PasswordAuthentication; import java.net.URL; public class Main {

 public static void main(String[] argv) throws Exception {
   Authenticator.setDefault(new MyAuthenticator());
   URL url = new URL("http://hostname:80/index.html");
   BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
   String str;
   while ((str = in.readLine()) != null) {
     System.out.println(str);
   }
   in.close();
 }

} class MyAuthenticator extends Authenticator {

 protected PasswordAuthentication getPasswordAuthentication() {
   String promptString = getRequestingPrompt();
   System.out.println(promptString);
   String hostname = getRequestingHost();
   System.out.println(hostname);
   InetAddress ipaddr = getRequestingSite();
   System.out.println(ipaddr);
   int port = getRequestingPort();
   String username = "name";
   String password = "password";
   return new PasswordAuthentication(username, password.toCharArray());
 }

}</source>

String java.net.Authenticator.getRequestingHost()

   <source lang="java">

import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.Authenticator; import java.net.InetAddress; import java.net.PasswordAuthentication; import java.net.URL; public class Main {

 public static void main(String[] argv) throws Exception {
   Authenticator.setDefault(new MyAuthenticator());
   URL url = new URL("http://hostname:80/index.html");
   BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
   String str;
   while ((str = in.readLine()) != null) {
     System.out.println(str);
   }
   in.close();
 }

} class MyAuthenticator extends Authenticator {

 protected PasswordAuthentication getPasswordAuthentication() {
   String promptString = getRequestingPrompt();
   System.out.println(promptString);
   String hostname = getRequestingHost();
   System.out.println(hostname);
   InetAddress ipaddr = getRequestingSite();
   System.out.println(ipaddr);
   int port = getRequestingPort();
   String username = "name";
   String password = "password";
   return new PasswordAuthentication(username, password.toCharArray());
 }

}</source>

String java.net.Authenticator.getRequestingPrompt()

   <source lang="java">

import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.Authenticator; import java.net.InetAddress; import java.net.PasswordAuthentication; import java.net.URL; public class Main {

 public static void main(String[] argv) throws Exception {
   Authenticator.setDefault(new MyAuthenticator());
   URL url = new URL("http://hostname:80/index.html");
   BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
   String str;
   while ((str = in.readLine()) != null) {
     System.out.println(str);
   }
   in.close();
 }

} class MyAuthenticator extends Authenticator {

 protected PasswordAuthentication getPasswordAuthentication() {
   String promptString = getRequestingPrompt();
   System.out.println(promptString);
   String hostname = getRequestingHost();
   System.out.println(hostname);
   InetAddress ipaddr = getRequestingSite();
   System.out.println(ipaddr);
   int port = getRequestingPort();
   String username = "name";
   String password = "password";
   return new PasswordAuthentication(username, password.toCharArray());
 }

}</source>