Java example source code file (MarkResetTest.java)
The MarkResetTest.java Java example source code/*
* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
*
* run from MarkResetTest.sh
*/
import java.io.*;
import java.net.*;
import java.util.regex.*;
public class MarkResetTest {
/**
* A class that simulates, on a separate, an FTP server.
*/
private class FtpServer extends Thread {
private ServerSocket server;
private int port;
private boolean done = false;
private boolean pasvEnabled = true;
private boolean portEnabled = true;
private boolean extendedEnabled = true;
/**
* This Inner class will handle ONE client at a time.
* That's where 99% of the protocol handling is done.
*/
private class FtpServerHandler extends Thread {
BufferedReader in;
PrintWriter out;
Socket client;
private final int ERROR = 0;
private final int USER = 1;
private final int PASS = 2;
private final int CWD = 3;
private final int TYPE = 4;
private final int RETR = 5;
private final int PASV = 6;
private final int PORT = 7;
private final int QUIT = 8;
private final int EPSV = 9;
String[] cmds = { "USER", "PASS", "CWD",
"TYPE", "RETR", "PASV",
"PORT", "QUIT", "EPSV"};
private String arg = null;
private ServerSocket pasv = null;
private int data_port = 0;
private InetAddress data_addr = null;
/**
* Parses a line to match it with one of the supported FTP commands.
* Returns the command number.
*/
private int parseCmd(String cmd) {
if (cmd == null || cmd.length() < 3)
return ERROR;
int blank = cmd.indexOf(' ');
if (blank < 0)
blank = cmd.length();
if (blank < 3)
return ERROR;
String s = cmd.substring(0, blank);
if (cmd.length() > blank+1)
arg = cmd.substring(blank+1, cmd.length());
else
arg = null;
for (int i = 0; i < cmds.length; i++) {
if (s.equalsIgnoreCase(cmds[i]))
return i+1;
}
return ERROR;
}
public FtpServerHandler(Socket cl) {
client = cl;
}
protected boolean isPasvSet() {
if (pasv != null && !pasvEnabled) {
try {
pasv.close();
} catch (IOException ex) {
}
pasv = null;
}
if (pasvEnabled && pasv != null)
return true;
return false;
}
/**
* Open the data socket with the client. This can be the
* result of a "PASV" or "PORT" command.
*/
protected OutputStream getOutDataStream() {
try {
if (isPasvSet()) {
Socket s = pasv.accept();
return s.getOutputStream();
}
if (data_addr != null) {
Socket s = new Socket(data_addr, data_port);
data_addr = null;
data_port = 0;
return s.getOutputStream();
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
protected InputStream getInDataStream() {
try {
if (isPasvSet()) {
Socket s = pasv.accept();
return s.getInputStream();
}
if (data_addr != null) {
Socket s = new Socket(data_addr, data_port);
data_addr = null;
data_port = 0;
return s.getInputStream();
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* Handles the protocol exchange with the client.
*/
public void run() {
boolean done = false;
String str;
int res;
boolean logged = false;
boolean waitpass = false;
try {
in = new BufferedReader(new InputStreamReader(
client.getInputStream()));
out = new PrintWriter(client.getOutputStream(), true);
out.println("220 tatooine FTP server (SunOS 5.8) ready.");
} catch (Exception ex) {
return;
}
while (!done) {
try {
str = in.readLine();
res = parseCmd(str);
if ((res > PASS && res != QUIT) && !logged) {
out.println("530 Not logged in.");
continue;
}
switch (res) {
case ERROR:
out.println("500 '" + str +
"': command not understood.");
break;
case USER:
if (!logged && !waitpass) {
out.println("331 Password required for " + arg);
waitpass = true;
} else {
out.println("503 Bad sequence of commands.");
}
break;
case PASS:
if (!logged && waitpass) {
out.println("230-Welcome to the FTP server!");
out.println("ab");
out.println("230 Guest login ok, " +
"access restrictions apply.");
logged = true;
waitpass = false;
} else
out.println("503 Bad sequence of commands.");
break;
case QUIT:
out.println("221 Goodbye.");
out.flush();
out.close();
if (pasv != null)
pasv.close();
done = true;
break;
case TYPE:
out.println("200 Type set to " + arg + ".");
break;
case CWD:
out.println("250 CWD command successful.");
break;
case EPSV:
if (!extendedEnabled || !pasvEnabled) {
out.println("500 EPSV is disabled, " +
"use PORT instead.");
continue;
}
if ("all".equalsIgnoreCase(arg)) {
out.println("200 EPSV ALL command successful.");
continue;
}
try {
if (pasv == null)
pasv = new ServerSocket(0);
int port = pasv.getLocalPort();
out.println("229 Entering Extended" +
" Passive Mode (|||" + port + "|)");
} catch (IOException ssex) {
out.println("425 Can't build data connection:" +
" Connection refused.");
}
break;
case PASV:
if (!pasvEnabled) {
out.println("500 PASV is disabled, " +
"use PORT instead.");
continue;
}
try {
if (pasv == null)
pasv = new ServerSocket(0);
int port = pasv.getLocalPort();
// Parenthesis are optional, so let's be
// nasty and don't put them
out.println("227 Entering Passive Mode" +
" 127,0,0,1," +
(port >> 8) + "," + (port & 0xff));
} catch (IOException ssex) {
out.println("425 Can't build data connection:" +
"Connection refused.");
}
break;
case PORT:
if (!portEnabled) {
out.println("500 PORT is disabled, " +
"use PASV instead");
continue;
}
StringBuffer host;
int i = 0, j = 4;
while (j > 0) {
i = arg.indexOf(',', i + 1);
if (i < 0)
break;
j--;
}
if (j != 0) {
out.println("500 '" + arg + "':" +
" command not understood.");
continue;
}
try {
host = new StringBuffer(arg.substring(0, i));
for (j = 0; j < host.length(); j++)
if (host.charAt(j) == ',')
host.setCharAt(j, '.');
String ports = arg.substring(i+1);
i = ports.indexOf(',');
data_port = Integer.parseInt(
ports.substring(0, i)) << 8;
data_port += (Integer.parseInt(
ports.substring(i+1)));
data_addr = InetAddress.getByName(
host.toString());
out.println("200 Command okay.");
} catch (Exception ex3) {
data_port = 0;
data_addr = null;
out.println("500 '" + arg + "':" +
" command not understood.");
}
break;
case RETR:
{
File file = new File(arg);
if (!file.exists()) {
System.out.println("File not found");
out.println("200 Command okay.");
out.println("550 '" + arg +
"' No such file or directory.");
break;
}
FileInputStream fin = new FileInputStream(file);
OutputStream dout = getOutDataStream();
if (dout != null) {
out.println("150 Binary data connection" +
" for " + arg +
" (" + client.getInetAddress().
getHostAddress() + ") (" +
file.length() + " bytes).");
int c;
int len = 0;
while ((c = fin.read()) != -1) {
dout.write(c);
len++;
}
dout.flush();
dout.close();
fin.close();
out.println("226 Binary Transfer complete.");
} else {
out.println("425 Can't build data" +
" connection: Connection refused.");
}
}
break;
}
} catch (IOException ioe) {
ioe.printStackTrace();
try {
out.close();
} catch (Exception ex2) {
}
done = true;
}
}
}
}
public FtpServer(int port) {
this.port = port;
}
public FtpServer() {
this(21);
}
public int getPort() {
if (server != null)
return server.getLocalPort();
return 0;
}
/**
* A way to tell the server that it can stop.
*/
synchronized public void terminate() {
done = true;
}
/*
* All we got to do here is create a ServerSocket and wait for a
* connection. When a connection happens, we just have to create
* a thread that will handle it.
*/
public void run() {
try {
server = new ServerSocket(port);
Socket client;
client = server.accept();
(new FtpServerHandler(client)).start();
server.close();
} catch (Exception e) {
}
}
}
public static void main(String[] args) throws Exception {
MarkResetTest test = new MarkResetTest();
}
public MarkResetTest() {
FtpServer server = null;
try {
server = new FtpServer(0);
server.start();
int port = 0;
while (port == 0) {
Thread.sleep(500);
port = server.getPort();
}
String filename = "EncDec.doc";
URL url = new URL("ftp://localhost:" + port + "/" +
filename);
URLConnection con = url.openConnection();
System.out.println("getContent: " + con.getContent());
System.out.println("getContent-length: " + con.getContentLength());
InputStream is = con.getInputStream();
/**
* guessContentTypeFromStream method calls mark and reset methods
* on the given stream. Make sure that calling
* guessContentTypeFromStream repeatedly does not affect
* reading from the stream afterwards
*/
System.out.println("Call GuessContentTypeFromStream()" +
" several times..");
for (int i = 0; i < 5; i++) {
System.out.println((i + 1) + " mime-type: " +
con.guessContentTypeFromStream(is));
}
int len = 0;
int c;
while ((c = is.read()) != -1) {
len++;
}
is.close();
System.out.println("read: " + len + " bytes of the file");
// We're done!
server.terminate();
server.interrupt();
// Did we pass ?
if (len != (new File(filename)).length()) {
throw new Exception("Failed to read the file correctly");
}
System.out.println("PASSED: File read correctly");
} catch (Exception e) {
e.printStackTrace();
try {
server.terminate();
server.interrupt();
} catch (Exception ex) {
}
throw new RuntimeException("FTP support error: " + e.getMessage());
}
}
}
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