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package sun.net;

import java.io.*;
import java.util.Vector;

This class implements that basic intefaces of transfer protocols. It is used by subclasses implementing specific protocols.
Author: Jonathan Payne
See Also:
/** * This class implements that basic intefaces of transfer protocols. * It is used by subclasses implementing specific protocols. * * @author Jonathan Payne * @see sun.net.ftp.FtpClient * @see sun.net.nntp.NntpClient */
public class TransferProtocolClient extends NetworkClient { static final boolean debug = false;
Array of strings (usually 1 entry) for the last reply from the server.
/** Array of strings (usually 1 entry) for the last reply from the server. */
protected Vector<String> serverResponse = new Vector<>(1);
code for last reply
/** code for last reply */
protected int lastReplyCode;
Pulls the response from the server and returns the code as a number. Returns -1 on failure.
/** * Pulls the response from the server and returns the code as a * number. Returns -1 on failure. */
public int readServerResponse() throws IOException { StringBuffer replyBuf = new StringBuffer(32); int c; int continuingCode = -1; int code; String response; serverResponse.setSize(0); while (true) { while ((c = serverInput.read()) != -1) { if (c == '\r') { if ((c = serverInput.read()) != '\n') replyBuf.append('\r'); } replyBuf.append((char)c); if (c == '\n') break; } response = replyBuf.toString(); replyBuf.setLength(0); if (debug) { System.out.print(response); } if (response.length() == 0) { code = -1; } else { try { code = Integer.parseInt(response.substring(0, 3)); } catch (NumberFormatException e) { code = -1; } catch (StringIndexOutOfBoundsException e) { /* this line doesn't contain a response code, so we just completely ignore it */ continue; } } serverResponse.addElement(response); if (continuingCode != -1) { /* we've seen a XXX- sequence */ if (code != continuingCode || (response.length() >= 4 && response.charAt(3) == '-')) { continue; } else { /* seen the end of code sequence */ continuingCode = -1; break; } } else if (response.length() >= 4 && response.charAt(3) == '-') { continuingCode = code; continue; } else { break; } } return lastReplyCode = code; }
Sends command cmd to the server.
/** Sends command <i>cmd</i> to the server. */
public void sendServer(String cmd) { serverOutput.print(cmd); if (debug) { System.out.print("Sending: " + cmd); } }
converts the server response into a string.
/** converts the server response into a string. */
public String getResponseString() { return serverResponse.elementAt(0); }
Returns all server response strings.
/** Returns all server response strings. */
public Vector<String> getResponseStrings() { return serverResponse; }
standard constructor to host host, port port.
/** standard constructor to host <i>host</i>, port <i>port</i>. */
public TransferProtocolClient(String host, int port) throws IOException { super(host, port); }
creates an uninitialized instance of this class.
/** creates an uninitialized instance of this class. */
public TransferProtocolClient() {} }