авторизация

java-Authenticator.java

//https://examples.javacodegeeks.com/core-java/net/authenticator/access-password-protected-url-with-authenticator/
//https://docs.oracle.com/javase/6/docs/technotes/guides/net/http-auth.html

package com.javacodegeeks.snippets.core;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Authenticator;
import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.PasswordAuthentication;
import java.net.URL;

public class AccessPasswordProtectedURLWithAuthenticator {
	
	public static void main(String[] args) {
		try {			
		    // Sets the authenticator that will be used by the networking code
		    // when a proxy or an HTTP server asks for authentication.
			Authenticator.setDefault(new CustomAuthenticator());
			URL url = new URL("http://www.secure-site-example.com:80/");			
			// read text returned by server
		    BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
		    String line;
		    while ((line = in.readLine()) != null) {
		    	System.out.println(line);
		    }
		    in.close();
		}
		catch (MalformedURLException e) {
			System.out.println("Malformed URL: " + e.getMessage());
		}
		catch (IOException e) {
			System.out.println("I/O Error: " + e.getMessage());
		}
	}
	
	public static class CustomAuthenticator extends Authenticator {
		// Called when password authorization is needed
		protected PasswordAuthentication getPasswordAuthentication() {
			// Get information about the request
			String prompt = getRequestingPrompt();
			String hostname = getRequestingHost();
			InetAddress ipaddr = getRequestingSite();
			int port = getRequestingPort();
			String username = "username";
			String password = "password";
			// Return the information (a data holder that is used by Authenticator)
			return new PasswordAuthentication(username, password.toCharArray());
		}
	}
}