socket programming

fishercoder1534 · fishercoder1534 · commit 80aaee17e1d4 · 2016-08-06T12:35:12.000-07:00
diff --git a/RandomProblems/src/sporadic/socket_programming/GreetingClient.java b/RandomProblems/src/sporadic/socket_programming/GreetingClient.java
@@ -0,0 +1,37 @@
+package sporadic.socket_programming;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.Socket;
+
+/**
+ * The following GreetingClient is a client program that connects to a server by
+ * using a socket and sends a greeting, and then waits for a response.
+ */
+
+public class GreetingClient {
+	public static void main(String[] args) {
+		String serverName = args[0];
+		int port = Integer.parseInt(args[1]);
+		try {
+			System.out.println("Connecting to " + serverName + " on port "
+					+ port);
+			Socket client = new Socket(serverName, port);
+			System.out.println("Just connected to "
+					+ client.getRemoteSocketAddress());
+			OutputStream outToServer = client.getOutputStream();
+			DataOutputStream out = new DataOutputStream(outToServer);
+
+			out.writeUTF("Hello from " + client.getLocalSocketAddress());
+			InputStream inFromServer = client.getInputStream();
+			DataInputStream in = new DataInputStream(inFromServer);
+			System.out.println("Server says " + in.readUTF());
+			client.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+}
diff --git a/RandomProblems/src/sporadic/socket_programming/GreetingServer.java b/RandomProblems/src/sporadic/socket_programming/GreetingServer.java
@@ -0,0 +1,74 @@
+package sporadic.socket_programming;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.net.SocketTimeoutException;
+
+// TODO: this program not working yet, make it work or start from scratch to write another socket
+// program to better understand socket.
+
+/**
+ * Compile client and server and then start server as follows:
+ * 
+ * $ java GreetingServer 6066 Waiting for client on port 6066... Check client
+ * program as follows:
+ * 
+ * $ java GreetingClient localhost 6066 Connecting to localhost on port 6066
+ * Just connected to localhost/127.0.0.1:6066 Server says Thank you for
+ * connecting to /127.0.0.1:6066 Goodbye!
+ * 
+ * But it's not working as above, running from Eclipse and from terminal,
+ * neither worked. I'll have to figure out why it didn't work and make it work
+ * in the future./
+ * 
+ * /** The following GreetingServer program is an example of a server
+ * application that uses the Socket class to listen for clients on a port number
+ * specified by a command-line argument:
+ */
+public class GreetingServer extends Thread {
+	private ServerSocket serverSocket;
+
+	public GreetingServer(int port) throws IOException {
+		serverSocket = new ServerSocket(port);
+		serverSocket.setSoTimeout(10000);
+	}
+
+	public void run() {
+		while (true) {
+			try {
+				System.out.println("Waiting for client on port "
+						+ serverSocket.getLocalPort() + "...");
+				Socket server = serverSocket.accept();
+				System.out.println("Just connected to "
+						+ server.getRemoteSocketAddress());
+				DataInputStream in = new DataInputStream(
+						server.getInputStream());
+				System.out.println(in.readUTF());
+				DataOutputStream out = new DataOutputStream(
+						server.getOutputStream());
+				out.writeUTF("Thank you for connecting to "
+						+ server.getLocalSocketAddress() + "\nGoodbye!");
+				server.close();
+			} catch (SocketTimeoutException s) {
+				System.out.println("Socket timed out!");
+				break;
+			} catch (IOException e) {
+				e.printStackTrace();
+				break;
+			}
+		}
+	}
+
+	public static void main(String[] args) {
+		int port = Integer.parseInt(args[0]);
+		try {
+			Thread t = new GreetingServer(port);
+			t.start();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+}
