75 lines
2.3 KiB
Java
75 lines
2.3 KiB
Java
package davmail;
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import java.io.IOException;
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import java.net.ServerSocket;
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import java.net.Socket;
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/**
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* Generic abstract server common to SMTP and POP3 implementations
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*/
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public abstract class AbstractServer extends Thread {
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private int port;
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private ServerSocket serverSocket;
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/**
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* Create a ServerSocket to listen for connections.
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* Start the thread.
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*/
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public AbstractServer(int port) {
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this.port = port;
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try {
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//noinspection SocketOpenedButNotSafelyClosed
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serverSocket = new ServerSocket(port);
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} catch (IOException e) {
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DavGatewayTray.error("Exception creating server socket", e);
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}
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}
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/**
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* The body of the server thread. Loop forever, listening for and
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* accepting connections from clients. For each connection,
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* create a Connection object to handle communication through the
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* new Socket.
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*/
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public void run() {
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Socket clientSocket = null;
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try {
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//noinspection InfiniteLoopStatement
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while (true) {
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clientSocket = serverSocket.accept();
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DavGatewayTray.debug("Connection from " + clientSocket.getInetAddress() + " on port " + port);
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// only accept localhost connections for security reasons
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if (clientSocket.getInetAddress().toString().indexOf("127.0.0.1") > 0) {
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createConnectionHandler(clientSocket);
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} else {
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clientSocket.close();
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DavGatewayTray.warn("Connection from external client refused");
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}
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System.gc();
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}
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} catch (IOException e) {
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DavGatewayTray.warn("Exception while listening for connections", e);
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} finally {
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try {
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if (clientSocket != null) {
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clientSocket.close();
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}
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} catch (IOException e) {
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// ignore
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}
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}
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}
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public abstract void createConnectionHandler(Socket clientSocket);
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public void close() {
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try {
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serverSocket.close();
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} catch (IOException e) {
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DavGatewayTray.warn("Exception closing server socket", e);
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}
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}
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}
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