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tanszek:oktatas:tcp_socket_connection

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tanszek:oktatas:tcp_socket_connection [2023/02/26 15:45] – [1.) Hagyományos blokkolt TCP alapú socket szerver] kneheztanszek:oktatas:tcp_socket_connection [2023/02/27 09:16] (current) – [Exercise 1.] knehez
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-====== Exercise ======+====== Socket client and server exercises ====== 
 + 
 +==== Exercise 1. ====
  
 Create a simplified FTP (file transport) client and server where the client can send or download text files from the server: Create a simplified FTP (file transport) client and server where the client can send or download text files from the server:
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   -) Server sends back the list of the downloadable files   -) Server sends back the list of the downloadable files
   -) Client lists the files and asks the user what action they want to take? Upload or download? ('u' or 'd')    -) Client lists the files and asks the user what action they want to take? Upload or download? ('u' or 'd') 
-  -) In both cases the uses must give the full file name with extension+  -) In both cases users must give the full file name with extension
   -) The client sends the selected file to the server (upload) or downloads the selected file from the server to a specific directory.   -) The client sends the selected file to the server (upload) or downloads the selected file from the server to a specific directory.
  
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   -) If you press "u", /files/ is sent to the server   -) If you press "u", /files/ is sent to the server
  
-====== Starting point of implementation ======+==== TCP style ==== 
  
  
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     }     }
 </code> </code>
-==== 2.) Hagyományos UDP alapú kommunikáció ====+==== Traditional UDP style ====
  
-2.a) Az alábbi Ágens küld egy üzenetet és a 8080-as porton várja a választ rá, ugyancsak UDP-vel. Az eclipse fejlesztőkörnyezetben a consolon beírt szöveget ctrl+z leütésével lehet elküldeni.+The following Agent sends a message and waits for a response on port 8080, also with UDP. In the Eclipse IDE, the text you type on the console can be sent by pressing ctrl+z
  
-**Feladat**: módosítsuk a kódot, hogy át tudjon küldeni egy beégetett nevű, és létező, 2 kbyte-nál nagyobb szöveges vagy kép állományt és ellenőrizzük a sikeres küldést.+== Exercise 2. ==  
 +Modify the code so that you can transfer a burned-in name and existing text or image file larger than 2 kbytes and verify that it was successfully sent.
  
 <code java> <code java>
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  String modifiedSentence = new String(receivePacket.getData());  String modifiedSentence = new String(receivePacket.getData());
   
- System.out.println("átalakítva:" + modifiedSentence);+ System.out.println("converted:" + modifiedSentence);
  clientSocket.close();  clientSocket.close();
  }  }
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 </code> </code>
  
-2.b) Az UDP szerver a 8080-as porton várja az ágensek üzeneteit és nagybetűre konvertálva visszaküldi a kliens UDP socketre.+2.b) The UDP server waits for the agents messages on port 8080 and converts them to uppercase letters and sends them back to the client UDP socket.
  
 <code java> <code java>
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  DatagramPacket receivePacket = new DatagramPacket(bytesReceived, bytesReceived.length);  DatagramPacket receivePacket = new DatagramPacket(bytesReceived, bytesReceived.length);
- // itt várakozik ameddig adat jön a 8080-as porton+ // here we are waiting for the packets
  serverSocket.receive(receivePacket);  serverSocket.receive(receivePacket);
   
- String szoveg = new String(receivePacket.getData());+ String textMessage = new String(receivePacket.getData());
   
- System.out.println("kaptam: " + szoveg);+ System.out.println("I got: " + textMessage);
   
  InetAddress IPAddress = receivePacket.getAddress();  InetAddress IPAddress = receivePacket.getAddress();
  int port = receivePacket.getPort();  int port = receivePacket.getPort();
   
- String nagybetűsSzöveg = szoveg.toUpperCase(); + String upperCaseText = textMessage.toUpperCase(); 
- bytesSent = nagybetűsSzöveg.getBytes();+ bytesSent = upperCaseText.getBytes();
   
- // visszaküldi+ // send back
  DatagramPacket sendPacket = new DatagramPacket(bytesSent, bytesSent.length, IPAddress, port);  DatagramPacket sendPacket = new DatagramPacket(bytesSent, bytesSent.length, IPAddress, port);
  serverSocket.send(sendPacket);  serverSocket.send(sendPacket);
tanszek/oktatas/tcp_socket_connection.1677426327.txt.gz · Last modified: by knehez