Java/Network Protocol/HttpsURLConnection

Accessing a Password-Protected URL

   <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>
   
  
 
  

Certification for HTTPS

   <source lang="java">
 

import java.io.FileOutputStream; import java.io.ObjectOutputStream; import java.security.cert.CertPath; import java.security.cert.CertificateFactory; import java.util.ArrayList; import java.util.List; import javax.net.ssl.HttpsURLConnection; import javax.net.ssl.SSLSession; import javax.net.ssl.SSLSocket; import javax.net.ssl.SSLSocketFactory; public class MainClass {

 public static void main(String args[]) throws Exception {
   SSLSocketFactory factory = HttpsURLConnection.getDefaultSSLSocketFactory();
   SSLSocket socket = (SSLSocket) factory.createSocket("127.0.0.1", 9999);
   socket.startHandshake();
   SSLSession session = socket.getSession();
   java.security.cert.Certificate[] servercerts = session.getPeerCertificates();
   List mylist = new ArrayList();
   for (int i = 0; i < servercerts.length; i++) {
     mylist.add(servercerts[i]);
   }
   CertificateFactory cf = CertificateFactory.getInstance("X.509");
   CertPath cp = cf.generateCertPath(mylist);
   FileOutputStream f = new FileOutputStream("CertPath.dat");
   ObjectOutputStream b = new ObjectOutputStream(f);
   b.writeObject(cp);
 }

}

 </source>
   
  
 
  

Disabling Certificate Validation in an HTTPS Connection

   <source lang="java">

import java.net.URL; import java.security.cert.X509Certificate; import javax.net.ssl.HttpsURLConnection; import javax.net.ssl.SSLContext; import javax.net.ssl.TrustManager; import javax.net.ssl.X509TrustManager; public class Main {

 public static void main(String[] argv) throws Exception {
   TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
     public java.security.cert.X509Certificate[] getAcceptedIssuers() {
       return null;
     }
     public void checkClientTrusted(X509Certificate[] certs, String authType) {
     }
     public void checkServerTrusted(X509Certificate[] certs, String authType) {
     }
   } };
   SSLContext sc = SSLContext.getInstance("SSL");
   sc.init(null, trustAllCerts, new java.security.SecureRandom());
   HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
   URL url = new URL("https://hostname/index.html");
 }

}

 </source>
   
  
 
  

Dump a page using the HTTPS protocol

   <source lang="java">

import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; public class Main {

 public static void main(String[] argv) throws Exception {
   URL url = new URL("https://www.server.ru");
   HttpURLConnection con = (HttpURLConnection) url.openConnection();
   BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
   String inputLine;
   while ((inputLine = in.readLine()) != null)
     System.out.println(inputLine);
   in.close();
 }

}

 </source>
   
  
 
  

Read data from a URL

   <source lang="java">
 

//Corrected version by Quentin Nerden (kenden at gmail dot com)

import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; public class WebReader {

 static void getData(String address) throws Exception {
   URL page = new URL(address);
   StringBuffer text = new StringBuffer();
   HttpURLConnection conn = (HttpURLConnection) page.openConnection();
   conn.connect();
   InputStreamReader in = new InputStreamReader((InputStream) conn.getContent());
   
   BufferedReader buff = new BufferedReader(in);
   String line = buff.readLine();
   while (line != null) {
       text.append(line + "\n");
       line = buff.readLine();
   }
   System.out.println(text.toString());
 }
 public static void main(String[] arguments) throws Exception {
   getData("http://jexp.ru");
 }

}

 </source>