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JAVA NETWORKINGMobile Programming
NETWORK TODAY
NETWORK TODAY
NETWORK TODAY
NETWORK TODAY
NETWORK IS…
WEB IS BIGGER NETWORK
HOW THEY COMMUNICATE?
PROTOCOL
ILLUSTRATION
IP: 192.168.1.1
IP: 192.168.1.2 IP: 192.168.1.3 IP: 192.168.1.4 IP: 192.168.1.5 IP: 192.168.1.6
DETAILED ILLUSTRATION
Logical Path
Physical Layer
Internet Layer (IP) Internet Layer (IP)
Transport Layer (TCP/IP) Transport Layer (TCP/IP)
Application Layer Application Layer
TERMINOLOGY• Transmission Control Protocol
• User Datagram Protocol
• Port
• URL
• HTTP
MORE TERMINOLOGY• HTML
• XML
• FTP
• SMTP
• POP3/IMAP
PROTOCOL SCANNER
1 import java.net.*; 2 3 public class ProtocolTester { 4 public static void main(String[] args) { 5 String url = "www.bl.ac.id"; 6 7 testProtocol("http://" + url); 8 testProtocol("https://" + url); 9 testProtocol("ftp://" + url); 10 testProtocol("nfs://" + url); 11 testProtocol("telnet://" + url); 12 testProtocol("mailto:[email protected]"); 13 14 15 } 16 17 private static void testProtocol (String url) { 18 try { 19 URL u = new URL(url); 20 System.out.println(u.getProtocol() + " is supported."); 21 } catch (MalformedURLException e) { 22 String protocol = url.substring(0, url.indexOf(":")); 23 System.out.println(protocol + " is not supported"); 24 } 25 } 26 }
YOUR TURN!
PORT SCANNER
1 import java.net.*; 2 import java.io.*; 3 4 public class LowPortScanner { 5 public static void main(String[] args) { 6 String host = "www.bl.ac.id"; 7 System.out.println("Tunggu ya, sedang mendeteksi..."); 8 9 for (int i = 1; i < 100; i++) { 10 try { 11 Socket s = new Socket(host, i); 12 System.out.println("Port " + i + " digunakan " + host); 13 } catch (UnknownHostException e) { 14 System.err.println(e); 15 } catch (IOException e) { 16 System.out.println("Port " + i + " Tidak Digunakan " + host); 17 } 18 } 19 } 20 }
YOUR TURN!
DOWNLOAD AND PARSE HTML PAGE
1 import java.net.*; 2 import java.io.*; 3 public class SourceViewer { 4 5 public static void main (String[] args) { 6 if (args.length > 0) { 7 InputStream in = null; 8 try { 9 URL u = new URL(args[0]); 10 in = u.openStream(); 11 12 in = new BufferedInputStream(in); 13 Reader r = new InputStreamReader(in); 14 int c; 15 while((c = r.read()) != -1) { 16 System.out.print((char) c); 17 }
18 } catch (MalformedURLException e) { 19 System.out.print(args[0] + " is not parseable URL"); 20 } catch (IOException e) { 21 System.err.println(e); 22 } finally { 23 if (in != null) { 24 try { 25 in.close(); 26 } catch (IOException e) { 27 // ignore 28 } 29 } 30 } 31 32 } 33 } 34 }
> java SourceViewer http://www.bl.ac.id/
<!DOCTYPE html><html lang="id-ID"><head><meta charset="UTF-8" /><title>Universitas Budi Luhur</title><link rel="profile" href="http://gmpg.org/xfn/11" /><link rel="pingback" href="http://www.budiluhur.ac.id/xmlrpc.php" /><script type="text/javascript" src="http://www.budiluhur.ac.id/wp- content/themes/new-bl/images/jquery.js"></script><link rel="EditURI" type="application/rsd+xml" title="RSD" href="http://www. budiluhur.ac.id/xmlrpc.php?rsd"><link rel="wlwmanifest" type="application/wlwmanifest+xml" href="http://www. budiluhur.ac.id/wp-includes/wlwmanifest.xml"><link rel="index" title="Universitas Budi Luhur" href="http://www.budiluhur.ac. id/"><meta name="generator" content="WordPress 3.0.1">
…
YOUR TURN!
SENDING EMAIL
1 import java.util.*; 2 import javax.mail.*; 3 import javax.mail.internet.*; 4 import javax.activation.*; 5 6 public class SendEmail { 7 public static void main (String[] args) { 8 String to = "[email protected]"; 9 String from = “[email protected]"; 10 String host = "192.168.1.134"; 11 Properties properties = System.getProperties(); 12 properties.setProperty("mail.smtp.host", host); 13 properties.put("mail.smtp.port", 1025); 14 Session session = Session.getDefaultInstance(properties); 15
16 try { 17 MimeMessage message = new MimeMessage(session); 18 message.setFrom(new InternetAddress(from)); 19 message.addRecipient(Message.RecipientType.TO, new InternetAddress(to)); 20 message.setSubject("This is the subject line"); 21 message.setText("This is actual message"); 22 23 Transport.send(message); 24 System.out.println("Sent message successfully..."); 25 } catch (MessagingException e) { 26 e.printStackTrace(); 27 } 28 } 29 } 30
RECEIVING EMAIL
1 import java.util.Properties; 2 import javax.mail.*; 3 import javax.mail.internet.*; 4 5 public class POP3Client { 6 public static void main(String[] args) throws Exception { 7 8 Properties properties = getProperties(); 9 10 Session session = getSession(properties); 11 12 Store store = connectingStore(session); 13 14 Folder inbox = getInboxFolder(store, "Inbox"); 15 16 Message[] messages = inbox.getMessages(); 17 18 if (messages.length == 0) 19 System.out.println("No message found"); 20 21 System.out.println(messages.length); 22 23 inbox.close(true); 24 store.close(); 25 } 26
27 private static Properties getProperties() { 28 29 Properties properties = System.getProperties(); 30 properties.put("mail.pop3.port", 995); 31 properties.put("mail.pop3.ssl.enable", true); 32 properties.setProperty("mail.pop3.ssl.trust", "*"); 33 34 return properties; 35 } 36 37 private static Session getSession(Properties properties) { 38 Session session = Session.getDefaultInstance(properties); 39 40 return session; 41 } 42
43 private static Store connectingStore(Session session) throws Exception { 44 String host = "pop.zoho.com"; 45 String username = "[email protected]"; 46 String password = "123456"; 47 48 Store store = session.getStore("pop3"); 49 store.connect(host, 995, username, password); 50 51 return store; 52 } 53 54 private static Folder getInboxFolder(Store store, String folder) throws 55 Exception { 56 Folder inbox = store.getFolder("Inbox"); 57 inbox.open(Folder.READ_ONLY); 58 59 return inbox; 60 } 61 }
YOUR TURN!
LET’S DO CHAT!
PROTOCOL
1 import java.net.*; 2 import java.io.*; 3 4 public class KnockKnockProtocol { 5 private static final int WAITING = 0; 6 private static final int SENTKNOCKKNOCK = 1; 7 private static final int SENTCLUE = 2; 8 private static final int ANOTHER = 3; 9 private static final int NUMJOKES = 5; 10 11 private int state = WAITING; 12 private int currentJoke = 0; 13 private String[] clues = {"Bessarion", "Colby", "Gary", "Teodor", "Kamala"}; 14 private String[] answers = {"Matiin AC dong, dingin nih!", "Lagi pusing 15 ya?", "Kelihatan ngga?", "Semoga sukses", 16 "Bazinga!"}; 17
18 public String processInput(String inputString) { 19 String outputString = null; 20 21 if (state == WAITING) { 22 outputString = "Tok, tok, tok"; 23 state = SENTKNOCKKNOCK; 24 } else if (state == SENTKNOCKKNOCK) { 25 if (inputString.equalsIgnoreCase("Siapa?")) { 26 outputString = clues[currentJoke]; 27 state = SENTCLUE; 28 } else { 29 outputString = "Seharusnya kamu menjawab \"Siapa?\"! " + "Yuk kita 30 coba lagi. Tok, tok, tok"; 31 state = ANOTHER; 32 } 33 } else if (state == SENTCLUE) { 34 if (inputString.equalsIgnoreCase(clues[currentJoke] + " siapa?")) { 35 outputString = answers[currentJoke] + " Ingin orang lain? (y/n)"; 36 state = ANOTHER; 37 } else { 38 outputString = "Seharusnya \"" + clues[currentJoke] + " siapa?\"" + 39 "! Coba lagi yaa. Tok, tok, tok"; 40 state = SENTKNOCKKNOCK; 41 }
42 } else if (state == ANOTHER) { 43 if (inputString.equalsIgnoreCase("y")) { 44 outputString = "Tok, tok, tok"; 45 if (currentJoke == (NUMJOKES - 1)) 46 currentJoke = 0; 47 else 48 currentJoke++; 49 state = SENTKNOCKKNOCK; 50 } else { 51 outputString = "Bye bye!"; 52 state = WAITING; 53 } 54 55 } 56 57 return outputString; 58 } 59 }
SERVER
1 import java.net.*; 2 import java.io.*; 3 4 public class KnockKnockServer { 5 public static void main(String[] args) throws IOException { 6 ServerSocket serverSocket = null; 7 8 try { 9 serverSocket = new ServerSocket(4444); 10 System.out.println("Ok, server ready!"); 11 } catch (IOException e) { 12 System.err.println("port 4444 tidak dapat digunakan."); 13 System.exit(1); 14 } 15 16 Socket clientSocket = null; 17 try { 18 clientSocket = serverSocket.accept(); 19 } catch (IOException e) { 20 System.err.println("Client gagal menggunakan port."); 21 System.exit(1); 22 } 23
24 PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true); 25 26 BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket. 27 getInputStream())); 28 29 String inputLine, outputLine; 30 31 KnockKnockProtocol kkp = new KnockKnockProtocol(); 32 outputLine = kkp.processInput(null); 33 out.println(outputLine); 34 35 while((inputLine = in.readLine()) != null) { 36 outputLine = kkp.processInput(inputLine); 37 out.println(outputLine); 38 39 if (outputLine.equals("Bye bye!")) 40 break; 41 } 42 43 out.close(); 44 in.close(); 45 clientSocket.close(); 46 serverSocket.close(); 47 } 48 }
CLIENT
1 import java.io.*; 2 import java.net.*; 3 4 public class KnockKnockClient { 5 public static void main(String[] args) throws IOException { 6 Socket kkSocket = null; 7 PrintWriter out = null; 8 BufferedReader in = null; 9 10 try { 11 kkSocket = new Socket("localhost", 4444); 12 out = new PrintWriter(kkSocket.getOutputStream(), true); 13 in = new BufferedReader(new InputStreamReader(kkSocket.getInputStream()) 14 ); 15 16 } catch (UnknownHostException e) { 17 System.err.println("Host localhost tidak ditemukan."); 18 System.exit(1); 19 } catch (IOException e) { 20 System.err.println("Koneksi Input output ke localhost gagal."); 21 System.exit(1); 22 } 23
24 BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in) 25 ); 26 String fromServer; 27 String fromUser; 28 29 while((fromServer = in.readLine()) != null) { 30 System.out.println("Server: " + fromServer); 31 if (fromServer.equals("Bye bye!")) 32 break; 33 34 fromUser = stdIn.readLine(); 35 36 if (fromUser != null) { 37 System.out.println("Client: " + fromUser); 38 out.println(fromUser); 39 } 40 } 41 42 out.close(); 43 in.close(); 44 stdIn.close(); 45 kkSocket.close(); 46 } 47 }
YOUR TURN!
![SETYO BUDI, M - Universitas Dian Nuswantoro [UDINUS] | One …dinus.ac.id/repository/docs/ajar/01.Manajemen_Database_1... · 2014-04-20 · Sistem Pemrosesan Berkas : ... apabila](https://img.pdfslide.us/doc/110x75/5cfc059988c99359778c7b26/setyo-budi-m-universitas-dian-nuswantoro-udinus-one-dinusacidrepositorydocsajar01manajemendatabase1.jpg)
