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third-party-mirror/openjdk/jdk25u/HEAD/./src/java.base/share/classes/sun/net/ftp/impl/FtpClient.java
blob: 1d6876f760e7bff3d64e69fc4f413aedabcd0cd3 [file]
/*
* Copyright (c) 2009, 2025, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package sun.net.ftp.impl;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.Closeable;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketAddress;
import java.text.DateFormat;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Base64;
import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import sun.net.ftp.FtpDirEntry;
import sun.net.ftp.FtpDirParser;
import sun.net.ftp.FtpProtocolException;
import sun.net.ftp.FtpReplyCode;
import sun.net.util.IPAddressUtil;
import sun.util.logging.PlatformLogger;
import static sun.net.util.ProxyUtil.copyProxy;
public class FtpClient extends sun.net.ftp.FtpClient {
private static int defaultSoTimeout;
private static int defaultConnectTimeout;
private static final PlatformLogger logger =
PlatformLogger.getLogger("sun.net.ftp.FtpClient");
private Proxy proxy;
private Socket server;
private PrintStream out;
private InputStream in;
private int readTimeout = -1;
private int connectTimeout = -1;
/* Name of encoding to use for output */
private static String encoding = "ISO8859_1";
/** remember the ftp server name because we may need it */
private InetSocketAddress serverAddr;
private boolean replyPending = false;
private boolean loggedIn = false;
private boolean useCrypto = false;
private SSLSocketFactory sslFact;
private Socket oldSocket;
/** Array of strings (usually 1 entry) for the last reply from the server. */
private Vector<String> serverResponse = new Vector<String>(1);
/** The last reply code from the ftp daemon. */
private FtpReplyCode lastReplyCode = null;
/** Welcome message from the server, if any. */
private String welcomeMsg;
/**
* Only passive mode used in JDK. See Bug 8010784.
*/
private final boolean passiveMode = true;
private TransferType type = TransferType.BINARY;
private long restartOffset = 0;
private long lastTransSize = -1; // -1 means 'unknown size'
private String lastFileName;
/**
* Static members used by the parser
*/
private static String[] patStrings = {
// drwxr-xr-x 1 user01 ftp 512 Jan 29 23:32 prog
"([\\-ld](?:[r\\-][w\\-][x\\-]){3})\\s*\\d+ (\\w+)\\s*(\\w+)\\s*(\\d+)\\s*([A-Z][a-z][a-z]\\s*\\d+)\\s*(\\d\\d:\\d\\d)\\s*(\\p{Print}*)",
// drwxr-xr-x 1 user01 ftp 512 Jan 29 1997 prog
"([\\-ld](?:[r\\-][w\\-][x\\-]){3})\\s*\\d+ (\\w+)\\s*(\\w+)\\s*(\\d+)\\s*([A-Z][a-z][a-z]\\s*\\d+)\\s*(\\d{4})\\s*(\\p{Print}*)",
// 04/28/2006 09:12a 3,563 genBuffer.sh
"(\\d{2}/\\d{2}/\\d{4})\\s*(\\d{2}:\\d{2}[ap])\\s*((?:[0-9,]+)|(?:<DIR>))\\s*(\\p{Graph}*)",
// 01-29-97 11:32PM <DIR> prog
"(\\d{2}-\\d{2}-\\d{2})\\s*(\\d{2}:\\d{2}[AP]M)\\s*((?:[0-9,]+)|(?:<DIR>))\\s*(\\p{Graph}*)"
};
private static int[][] patternGroups = {
// 0 - file, 1 - size, 2 - date, 3 - time, 4 - year, 5 - permissions,
// 6 - user, 7 - group
{7, 4, 5, 6, 0, 1, 2, 3},
{7, 4, 5, 0, 6, 1, 2, 3},
{4, 3, 1, 2, 0, 0, 0, 0},
{4, 3, 1, 2, 0, 0, 0, 0}};
private static Pattern[] patterns;
private static Pattern linkp = Pattern.compile("(\\p{Print}+) \\-\\> (\\p{Print}+)$");
private DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM, java.util.Locale.US);
private static final boolean acceptPasvAddressVal;
static {
defaultSoTimeout = Integer.getInteger("sun.net.client.defaultReadTimeout", 300_000).intValue();
if (defaultSoTimeout == 0) {
defaultSoTimeout = -1;
}
defaultConnectTimeout = Integer.getInteger("sun.net.client.defaultConnectTimeout", 300_000).intValue();
if (defaultConnectTimeout == 0) {
defaultConnectTimeout = -1;
}
encoding = System.getProperty("file.encoding", "ISO8859_1");
try {
if (!isASCIISuperset(encoding)) {
encoding = "ISO8859_1";
}
} catch (Exception e) {
encoding = "ISO8859_1";
}
patterns = new Pattern[patStrings.length];
for (int i = 0; i < patStrings.length; i++) {
patterns[i] = Pattern.compile(patStrings[i]);
}
acceptPasvAddressVal = Boolean.getBoolean("jdk.net.ftp.trustPasvAddress");
}
/**
* Test the named character encoding to verify that it converts ASCII
* characters correctly. We have to use an ASCII based encoding, or else
* the NetworkClients will not work correctly in EBCDIC based systems.
* However, we cannot just use ASCII or ISO8859_1 universally, because in
* Asian locales, non-ASCII characters may be embedded in otherwise
* ASCII based protocols (e.g. HTTP). The specifications (RFC2616, 2398)
* are a little ambiguous in this matter. For instance, RFC2398 [part 2.1]
* says that the HTTP request URI should be escaped using a defined
* mechanism, but there is no way to specify in the escaped string what
* the original character set is. It is not correct to assume that
* UTF-8 is always used (as in URLs in HTML 4.0). For this reason,
* until the specifications are updated to deal with this issue more
* comprehensively, and more importantly, HTTP servers are known to
* support these mechanisms, we will maintain the current behavior
* where it is possible to send non-ASCII characters in their original
* unescaped form.
*/
private static boolean isASCIISuperset(String encoding) throws Exception {
String chkS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
"abcdefghijklmnopqrstuvwxyz-_.!~*'();/?:@&=+$,";
// Expected byte sequence for string above
byte[] chkB = {48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 65, 66, 67, 68, 69, 70, 71, 72,
73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 97, 98, 99,
100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114,
115, 116, 117, 118, 119, 120, 121, 122, 45, 95, 46, 33, 126, 42, 39, 40, 41, 59,
47, 63, 58, 64, 38, 61, 43, 36, 44};
byte[] b = chkS.getBytes(encoding);
return Arrays.equals(b, chkB);
}
private class DefaultParser implements FtpDirParser {
/**
* Possible patterns:
*
* drwxr-xr-x 1 user01 ftp 512 Jan 29 23:32 prog
* drwxr-xr-x 1 user01 ftp 512 Jan 29 1997 prog
* drwxr-xr-x 1 1 1 512 Jan 29 23:32 prog
* lrwxr-xr-x 1 user01 ftp 512 Jan 29 23:32 prog -> prog2000
* drwxr-xr-x 1 username ftp 512 Jan 29 23:32 prog
* -rw-r--r-- 1 jcc staff 105009 Feb 3 15:05 test.1
*
* 01-29-97 11:32PM <DIR> prog
* 04/28/2006 09:12a 3,563 genBuffer.sh
*
* drwxr-xr-x folder 0 Jan 29 23:32 prog
*
* 0 DIR 01-29-97 23:32 PROG
*/
private DefaultParser() {
}
public FtpDirEntry parseLine(String line) {
String fdate = null;
String fsize = null;
String time = null;
String filename = null;
String permstring = null;
String username = null;
String groupname = null;
boolean dir = false;
Calendar now = Calendar.getInstance();
int year = now.get(Calendar.YEAR);
Matcher m = null;
for (int j = 0; j < patterns.length; j++) {
m = patterns[j].matcher(line);
if (m.find()) {
// 0 - file, 1 - size, 2 - date, 3 - time, 4 - year,
// 5 - permissions, 6 - user, 7 - group
filename = m.group(patternGroups[j][0]);
fsize = m.group(patternGroups[j][1]);
fdate = m.group(patternGroups[j][2]);
if (patternGroups[j][4] > 0) {
fdate += (", " + m.group(patternGroups[j][4]));
} else if (patternGroups[j][3] > 0) {
fdate += (", " + String.valueOf(year));
}
if (patternGroups[j][3] > 0) {
time = m.group(patternGroups[j][3]);
}
if (patternGroups[j][5] > 0) {
permstring = m.group(patternGroups[j][5]);
dir = permstring.startsWith("d");
}
if (patternGroups[j][6] > 0) {
username = m.group(patternGroups[j][6]);
}
if (patternGroups[j][7] > 0) {
groupname = m.group(patternGroups[j][7]);
}
// Old DOS format
if ("<DIR>".equals(fsize)) {
dir = true;
fsize = null;
}
}
}
if (filename != null) {
Date d;
try {
d = df.parse(fdate);
} catch (Exception e) {
d = null;
}
if (d != null && time != null) {
int c = time.indexOf(':');
now.setTime(d);
now.set(Calendar.HOUR, Integer.parseInt(time, 0, c, 10));
now.set(Calendar.MINUTE, Integer.parseInt(time, c + 1, time.length(), 10));
d = now.getTime();
}
// see if it's a symbolic link, i.e. the name if followed
// by a -> and a path
Matcher m2 = linkp.matcher(filename);
if (m2.find()) {
// Keep only the name then
filename = m2.group(1);
}
boolean[][] perms = new boolean[3][3];
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
perms[i][j] = (permstring.charAt((i * 3) + j) != '-');
}
}
FtpDirEntry file = new FtpDirEntry(filename);
file.setUser(username).setGroup(groupname);
file.setSize(Long.parseLong(fsize)).setLastModified(d);
file.setPermissions(perms);
file.setType(dir ? FtpDirEntry.Type.DIR : (line.charAt(0) == 'l' ? FtpDirEntry.Type.LINK : FtpDirEntry.Type.FILE));
return file;
}
return null;
}
}
private static class MLSxParser implements FtpDirParser {
public FtpDirEntry parseLine(String line) {
String name = null;
int i = line.lastIndexOf(';');
if (i > 0) {
name = line.substring(i + 1).trim();
line = line.substring(0, i);
} else {
name = line.trim();
line = "";
}
FtpDirEntry file = new FtpDirEntry(name);
while (!line.isEmpty()) {
String s;
i = line.indexOf(';');
if (i > 0) {
s = line.substring(0, i);
line = line.substring(i + 1);
} else {
s = line;
line = "";
}
i = s.indexOf('=');
if (i > 0) {
String fact = s.substring(0, i);
String value = s.substring(i + 1);
file.addFact(fact, value);
}
}
String s = file.getFact("Size");
if (s != null) {
file.setSize(Long.parseLong(s));
}
s = file.getFact("Modify");
if (s != null) {
Date d = parseRfc3659TimeValue(s);
if (d != null) {
file.setLastModified(d);
}
}
s = file.getFact("Create");
if (s != null) {
Date d = parseRfc3659TimeValue(s);
if (d != null) {
file.setCreated(d);
}
}
s = file.getFact("Type");
if (s != null) {
if (s.equalsIgnoreCase("file")) {
file.setType(FtpDirEntry.Type.FILE);
}
if (s.equalsIgnoreCase("dir")) {
file.setType(FtpDirEntry.Type.DIR);
}
if (s.equalsIgnoreCase("cdir")) {
file.setType(FtpDirEntry.Type.CDIR);
}
if (s.equalsIgnoreCase("pdir")) {
file.setType(FtpDirEntry.Type.PDIR);
}
}
return file;
}
};
private FtpDirParser parser = new DefaultParser();
private FtpDirParser mlsxParser = new MLSxParser();
private static Pattern transPat = null;
private void getTransferSize() {
lastTransSize = -1;
/**
* If it's a start of data transfer response, let's try to extract
* the size from the response string. Usually it looks like that:
*
* 150 Opening BINARY mode data connection for foo (6701 bytes).
*/
String response = getLastResponseString();
if (transPat == null) {
transPat = Pattern.compile("150 Opening .*\\((\\d+) bytes\\).");
}
Matcher m = transPat.matcher(response);
if (m.find()) {
String s = m.group(1);
lastTransSize = Long.parseLong(s);
}
}
/**
* extract the created file name from the response string:
* 226 Transfer complete (unique file name:toto.txt.1).
* Usually happens when a STOU (store unique) command had been issued.
*/
private void getTransferName() {
lastFileName = null;
String response = getLastResponseString();
int i = response.indexOf("unique file name:");
int e = response.lastIndexOf(')');
if (i >= 0) {
i += 17; // Length of "unique file name:"
lastFileName = response.substring(i, e);
}
}
/**
* Pulls the response from the server and returns the code as a
* number. Returns -1 on failure.
*/
private int readServerResponse() throws IOException {
StringBuilder replyBuf = new StringBuilder(32);
int c;
int continuingCode = -1;
int code;
String response;
serverResponse.setSize(0);
while (true) {
while ((c = in.read()) != -1) {
if (c == '\r') {
if ((c = in.read()) != '\n') {
replyBuf.append('\r');
}
}
replyBuf.append((char) c);
if (c == '\n') {
break;
}
}
response = replyBuf.toString();
replyBuf.setLength(0);
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("Server [" + serverAddr + "] --> " + response);
}
if (response.isEmpty()) {
code = -1;
} else {
try {
code = Integer.parseInt(response, 0, 3, 10);
} catch (NumberFormatException e) {
code = -1;
} catch (IndexOutOfBoundsException 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 ###- 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 code;
}
/** Sends command <i>cmd</i> to the server. */
private void sendServer(String cmd) {
out.print(cmd);
if (logger.isLoggable(PlatformLogger.Level.FINEST)) {
logger.finest("Server [" + serverAddr + "] <-- " + cmd);
}
}
/** converts the server response into a string. */
private String getResponseString() {
return serverResponse.elementAt(0);
}
/** Returns all server response strings. */
private Vector<String> getResponseStrings() {
return serverResponse;
}
/**
* Read the reply from the FTP server.
*
* @return <code>true</code> if the command was successful
* @throws IOException if an error occurred
*/
private boolean readReply() throws IOException {
lastReplyCode = FtpReplyCode.find(readServerResponse());
if (lastReplyCode.isPositivePreliminary()) {
replyPending = true;
return true;
}
if (lastReplyCode.isPositiveCompletion() || lastReplyCode.isPositiveIntermediate()) {
if (lastReplyCode == FtpReplyCode.CLOSING_DATA_CONNECTION) {
getTransferName();
}
return true;
}
return false;
}
/**
* Sends a command to the FTP server and returns the error code
* (which can be a "success") sent by the server.
*
* @param cmd
* @return <code>true</code> if the command was successful
* @throws IOException
*/
private boolean issueCommand(String cmd) throws IOException,
sun.net.ftp.FtpProtocolException {
if (!isConnected()) {
throw new IllegalStateException("Not connected");
}
if (replyPending) {
try {
completePending();
} catch (sun.net.ftp.FtpProtocolException e) {
// ignore...
}
}
if (cmd.indexOf('\n') != -1) {
sun.net.ftp.FtpProtocolException ex
= new sun.net.ftp.FtpProtocolException("Illegal FTP command");
ex.initCause(new IllegalArgumentException("Illegal carriage return"));
throw ex;
}
sendServer(cmd + "\r\n");
return readReply();
}
/**
* Send a command to the FTP server and check for success.
*
* @param cmd String containing the command
*
* @throws FtpProtocolException if an error occurred
*/
private void issueCommandCheck(String cmd) throws sun.net.ftp.FtpProtocolException, IOException {
if (!issueCommand(cmd)) {
throw new sun.net.ftp.FtpProtocolException(cmd + ":" + getResponseString(), getLastReplyCode());
}
}
private static Pattern epsvPat = null;
private static Pattern pasvPat = null;
/**
* Opens a "PASSIVE" connection with the server and returns the connected
* <code>Socket</code>.
*
* @return the connected <code>Socket</code>
* @throws IOException if the connection was unsuccessful.
*/
private Socket openPassiveDataConnection(String cmd) throws sun.net.ftp.FtpProtocolException, IOException {
String serverAnswer;
int port;
InetSocketAddress dest = null;
/**
* Here is the idea:
*
* - First we want to try the new (and IPv6 compatible) EPSV command
* But since we want to be nice with NAT software, we'll issue the
* EPSV ALL command first.
* EPSV is documented in RFC2428
* - If EPSV fails, then we fall back to the older, yet ok, PASV
* - If PASV fails as well, then we throw an exception and the calling
* method will have to try the EPRT or PORT command
*/
if (issueCommand("EPSV ALL")) {
// We can safely use EPSV commands
issueCommandCheck("EPSV");
serverAnswer = getResponseString();
// The response string from a EPSV command will contain the port number
// the format will be :
// 229 Entering Extended PASSIVE Mode (|||58210|)
//
// So we'll use the regular expressions package to parse the output.
if (epsvPat == null) {
epsvPat = Pattern.compile("^229 .* \\(\\|\\|\\|(\\d+)\\|\\)");
}
Matcher m = epsvPat.matcher(serverAnswer);
if (!m.find()) {
throw new sun.net.ftp.FtpProtocolException("EPSV failed : " + serverAnswer);
}
// Yay! Let's extract the port number
String s = m.group(1);
port = Integer.parseInt(s);
InetAddress add = server.getInetAddress();
if (add != null) {
dest = new InetSocketAddress(add, port);
} else {
// This means we used an Unresolved address to connect in
// the first place. Most likely because the proxy is doing
// the name resolution for us, so let's keep using unresolved
// address.
dest = InetSocketAddress.createUnresolved(serverAddr.getHostName(), port);
}
} else {
// EPSV ALL failed, so Let's try the regular PASV cmd
issueCommandCheck("PASV");
serverAnswer = getResponseString();
// Let's parse the response String to get the IP & port to connect
// to. The String should be in the following format :
//
// 227 Entering PASSIVE Mode (A1,A2,A3,A4,p1,p2)
//
// Note that the two parenthesis are optional
//
// The IP address is A1.A2.A3.A4 and the port is p1 * 256 + p2
//
// The regular expression is a bit more complex this time, because
// the parenthesis are optionals and we have to use 3 groups.
if (pasvPat == null) {
pasvPat = Pattern.compile("227 .* \\(?(\\d{1,3},\\d{1,3},\\d{1,3},\\d{1,3}),(\\d{1,3}),(\\d{1,3})\\)?");
}
Matcher m = pasvPat.matcher(serverAnswer);
if (!m.find()) {
throw new sun.net.ftp.FtpProtocolException("PASV failed : " + serverAnswer);
}
// Get port number out of group 2 & 3
port = Integer.parseInt(m.group(3)) + (Integer.parseInt(m.group(2)) << 8);
// IP address is simple
String s = m.group(1).replace(',', '.');
if (!IPAddressUtil.isIPv4LiteralAddress(s))
throw new FtpProtocolException("PASV failed : " + serverAnswer);
if (acceptPasvAddressVal) {
dest = new InetSocketAddress(s, port);
} else {
dest = validatePasvAddress(port, s, server.getInetAddress());
}
}
// Got everything, let's open the socket!
Socket s;
if (proxy != null) {
if (proxy.type() == Proxy.Type.SOCKS) {
s = new Socket(proxy);
} else {
s = new Socket(Proxy.NO_PROXY);
}
} else {
s = new Socket();
}
InetAddress serverAddress = server.getLocalAddress();
// Bind the socket to the same address as the control channel. This
// is needed in case of multi-homed systems.
s.bind(new InetSocketAddress(serverAddress, 0));
if (connectTimeout >= 0) {
s.connect(dest, connectTimeout);
} else {
if (defaultConnectTimeout > 0) {
s.connect(dest, defaultConnectTimeout);
} else {
s.connect(dest);
}
}
if (readTimeout >= 0) {
s.setSoTimeout(readTimeout);
} else if (defaultSoTimeout > 0) {
s.setSoTimeout(defaultSoTimeout);
}
if (useCrypto) {
try {
s = sslFact.createSocket(s, dest.getHostName(), dest.getPort(), true);
} catch (Exception e) {
throw new sun.net.ftp.FtpProtocolException("Can't open secure data channel: " + e);
}
}
if (!issueCommand(cmd)) {
s.close();
if (getLastReplyCode() == FtpReplyCode.FILE_UNAVAILABLE) {
// Ensure backward compatibility
throw new FileNotFoundException(cmd);
}
throw new sun.net.ftp.FtpProtocolException(cmd + ":" + getResponseString(), getLastReplyCode());
}
return s;
}
static final String ERROR_MSG = "Address should be the same as originating server";
/**
* Returns an InetSocketAddress, based on value of acceptPasvAddressVal
* and other conditions such as the server address returned by pasv
* is not a hostname, is a socks proxy, or the loopback. An exception
* is thrown if none of the valid conditions are met.
*/
private InetSocketAddress validatePasvAddress(int port, String s, InetAddress address)
throws FtpProtocolException
{
if (address == null) {
return InetSocketAddress.createUnresolved(serverAddr.getHostName(), port);
}
String serverAddress = address.getHostAddress();
if (serverAddress.equals(s)) {
return new InetSocketAddress(s, port);
} else if (address.isLoopbackAddress() && s.startsWith("127.")) { // can be 127.0
return new InetSocketAddress(s, port);
} else if (address.isLoopbackAddress()) {
if (getLocalHost().getHostAddress().equals(s)) {
return new InetSocketAddress(s, port);
} else {
throw new FtpProtocolException(ERROR_MSG);
}
} else if (s.startsWith("127.")) {
if (getLocalHost().equals(address)) {
return new InetSocketAddress(s, port);
} else {
throw new FtpProtocolException(ERROR_MSG);
}
}
String hostName = address.getHostName();
if (!(IPAddressUtil.isIPv4LiteralAddress(hostName) || IPAddressUtil.isIPv6LiteralAddress(hostName))) {
InetAddress[] names = getAllByName(hostName);
String resAddress = Arrays
.stream(names)
.map(InetAddress::getHostAddress)
.filter(s::equalsIgnoreCase)
.findFirst()
.orElse(null);
if (resAddress != null) {
return new InetSocketAddress(s, port);
}
}
throw new FtpProtocolException(ERROR_MSG);
}
private static InetAddress getLocalHost() throws FtpProtocolException {
try {
return InetAddress.getLocalHost();
} catch (Exception e) {
var ftpEx = new FtpProtocolException(ERROR_MSG);
ftpEx.initCause(e);
throw ftpEx;
}
}
private static InetAddress[] getAllByName(String hostName) throws FtpProtocolException {
try {
return InetAddress.getAllByName(hostName);
} catch (Exception e) {
var ftpEx = new FtpProtocolException(ERROR_MSG);
ftpEx.initCause(e);
throw ftpEx;
}
}
/**
* Opens a data connection with the server according to the set mode
* (ACTIVE or PASSIVE) then send the command passed as an argument.
*
* @param cmd the <code>String</code> containing the command to execute
* @return the connected <code>Socket</code>
* @throws IOException if the connection or command failed
*/
private Socket openDataConnection(String cmd) throws sun.net.ftp.FtpProtocolException, IOException {
Socket clientSocket;
if (passiveMode) {
try {
return openPassiveDataConnection(cmd);
} catch (sun.net.ftp.FtpProtocolException e) {
// If Passive mode failed, fall back on PORT
// Otherwise throw exception
String errmsg = e.getMessage();
if (!errmsg.startsWith("PASV") && !errmsg.startsWith("EPSV")) {
throw e;
}
}
}
ServerSocket portSocket;
InetAddress myAddress;
String portCmd;
if (proxy != null && proxy.type() == Proxy.Type.SOCKS) {
// We're behind a firewall and the passive mode fail,
// since we can't accept a connection through SOCKS (yet)
// throw an exception
throw new sun.net.ftp.FtpProtocolException("Passive mode failed");
}
// Bind the ServerSocket to the same address as the control channel
// This is needed for multi-homed systems
portSocket = new ServerSocket(0, 1, server.getLocalAddress());
try {
myAddress = portSocket.getInetAddress();
if (myAddress.isAnyLocalAddress()) {
myAddress = server.getLocalAddress();
}
// Let's try the new, IPv6 compatible EPRT command
// See RFC2428 for specifics
// Some FTP servers (like the one on Solaris) are bugged, they
// will accept the EPRT command but then, the subsequent command
// (e.g. RETR) will fail, so we have to check BOTH results (the
// EPRT cmd then the actual command) to decide whether we should
// fall back on the older PORT command.
portCmd = "EPRT |" + ((myAddress instanceof Inet6Address) ? "2" : "1") + "|" +
myAddress.getHostAddress() + "|" + portSocket.getLocalPort() + "|";
if (!issueCommand(portCmd) || !issueCommand(cmd)) {
// The EPRT command failed, let's fall back to good old PORT
portCmd = "PORT ";
byte[] addr = myAddress.getAddress();
/* append host addr */
for (int i = 0; i < addr.length; i++) {
portCmd = portCmd + (addr[i] & 0xFF) + ",";
}
/* append port number */
portCmd = portCmd + ((portSocket.getLocalPort() >>> 8) & 0xff) + "," + (portSocket.getLocalPort() & 0xff);
issueCommandCheck(portCmd);
issueCommandCheck(cmd);
}
// Either the EPRT or the PORT command was successful
// Let's create the client socket
if (connectTimeout >= 0) {
portSocket.setSoTimeout(connectTimeout);
} else {
if (defaultConnectTimeout > 0) {
portSocket.setSoTimeout(defaultConnectTimeout);
}
}
clientSocket = portSocket.accept();
if (readTimeout >= 0) {
clientSocket.setSoTimeout(readTimeout);
} else {
if (defaultSoTimeout > 0) {
clientSocket.setSoTimeout(defaultSoTimeout);
}
}
} finally {
portSocket.close();
}
if (useCrypto) {
try {
clientSocket = sslFact.createSocket(clientSocket, serverAddr.getHostName(), serverAddr.getPort(), true);
} catch (Exception ex) {
throw new IOException(ex.getLocalizedMessage());
}
}
return clientSocket;
}
private InputStream createInputStream(InputStream in) {
if (type == TransferType.ASCII) {
return new sun.net.TelnetInputStream(in, false);
}
return in;
}
private OutputStream createOutputStream(OutputStream out) {
if (type == TransferType.ASCII) {
return new sun.net.TelnetOutputStream(out, false);
}
return out;
}
/**
* Creates an instance of FtpClient. The client is not connected to any
* server yet.
*
*/
protected FtpClient() {
}
/**
* Creates an instance of FtpClient. The client is not connected to any
* server yet.
*
*/
public static sun.net.ftp.FtpClient create() {
return new FtpClient();
}
/**
* Set the transfer mode to <I>passive</I>. In that mode, data connections
* are established by having the client connect to the server.
* This is the recommended default mode as it will work best through
* firewalls and NATs.
*
* @return This FtpClient
* @see #setActiveMode()
*/
public sun.net.ftp.FtpClient enablePassiveMode(boolean passive) {
// Only passive mode used in JDK. See Bug 8010784.
// passiveMode = passive;
return this;
}
/**
* Gets the current transfer mode.
*
* @return the current <code>FtpTransferMode</code>
*/
public boolean isPassiveModeEnabled() {
return passiveMode;
}
/**
* Sets the timeout value to use when connecting to the server,
*
* @param timeout the timeout value, in milliseconds, to use for the connect
* operation. A value of zero or less, means use the default timeout.
*
* @return This FtpClient
*/
public sun.net.ftp.FtpClient setConnectTimeout(int timeout) {
connectTimeout = timeout;
return this;
}
/**
* Returns the current connection timeout value.
*
* @return the value, in milliseconds, of the current connect timeout.
* @see #setConnectTimeout(int)
*/
public int getConnectTimeout() {
return connectTimeout;
}
/**
* Sets the timeout value to use when reading from the server,
*
* @param timeout the timeout value, in milliseconds, to use for the read
* operation. A value of zero or less, means use the default timeout.
* @return This FtpClient
*/
public sun.net.ftp.FtpClient setReadTimeout(int timeout) {
readTimeout = timeout;
return this;
}
/**
* Returns the current read timeout value.
*
* @return the value, in milliseconds, of the current read timeout.
* @see #setReadTimeout(int)
*/
public int getReadTimeout() {
return readTimeout;
}
public sun.net.ftp.FtpClient setProxy(Proxy p) {
proxy = copyProxy(p);
return this;
}
/**
* Get the proxy of this FtpClient
*
* @return the <code>Proxy</code>, this client is using, or <code>null</code>
* if none is used.
* @see #setProxy(Proxy)
*/
public Proxy getProxy() {
return proxy;
}
/**
* Connects to the specified destination.
*
* @param dest the <code>InetSocketAddress</code> to connect to.
* @throws IOException if the connection fails.
*/
private void tryConnect(InetSocketAddress dest, int timeout) throws IOException {
if (isConnected()) {
disconnect();
}
server = doConnect(dest, timeout);
try {
out = new PrintStream(new BufferedOutputStream(server.getOutputStream()),
true, encoding);
} catch (UnsupportedEncodingException e) {
throw new InternalError(encoding + "encoding not found", e);
}
in = new BufferedInputStream(server.getInputStream());
}
private Socket doConnect(InetSocketAddress dest, int timeout) throws IOException {
Socket s;
if (proxy != null) {
if (proxy.type() == Proxy.Type.SOCKS) {
s = new Socket(proxy);
} else {
s = new Socket(Proxy.NO_PROXY);
}
} else {
s = new Socket();
}
// Instance specific timeouts do have priority, that means
// connectTimeout & readTimeout (-1 means not set)
// Then global default timeouts
// Then no timeout.
if (timeout >= 0) {
s.connect(dest, timeout);
} else {
if (connectTimeout >= 0) {
s.connect(dest, connectTimeout);
} else {
if (defaultConnectTimeout > 0) {
s.connect(dest, defaultConnectTimeout);
} else {
s.connect(dest);
}
}
}
if (readTimeout >= 0) {
s.setSoTimeout(readTimeout);
} else if (defaultSoTimeout > 0) {
s.setSoTimeout(defaultSoTimeout);
}
return s;
}
private void disconnect() throws IOException {
if (isConnected()) {
server.close();
}
server = null;
in = null;
out = null;
lastTransSize = -1;
lastFileName = null;
restartOffset = 0;
welcomeMsg = null;
lastReplyCode = null;
serverResponse.setSize(0);
}
/**
* Tests whether this client is connected or not to a server.
*
* @return <code>true</code> if the client is connected.
*/
public boolean isConnected() {
return server != null;
}
public SocketAddress getServerAddress() {
return server == null ? null : server.getRemoteSocketAddress();
}
public sun.net.ftp.FtpClient connect(SocketAddress dest) throws sun.net.ftp.FtpProtocolException, IOException {
return connect(dest, -1);
}
/**
* Connects the FtpClient to the specified destination.
*
* @param dest the address of the destination server
* @throws IOException if connection failed.
*/
public sun.net.ftp.FtpClient connect(SocketAddress dest, int timeout) throws sun.net.ftp.FtpProtocolException, IOException {
if (!(dest instanceof InetSocketAddress)) {
throw new IllegalArgumentException("Wrong address type");
}
serverAddr = (InetSocketAddress) dest;
tryConnect(serverAddr, timeout);
if (!readReply()) {
throw new sun.net.ftp.FtpProtocolException("Welcome message: " +
getResponseString(), lastReplyCode);
}
welcomeMsg = getResponseString().substring(4);
return this;
}
private void tryLogin(String user, char[] password) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("USER " + user);
/*
* Checks for "331 User name okay, need password." answer
*/
if (lastReplyCode == FtpReplyCode.NEED_PASSWORD) {
if ((password != null) && (password.length > 0)) {
issueCommandCheck("PASS " + String.valueOf(password));
}
}
}
/**
* Attempts to log on the server with the specified user name and password.
*
* @param user The user name
* @param password The password for that user
* @return <code>true</code> if the login was successful.
* @throws IOException if an error occurred during the transmission
*/
public sun.net.ftp.FtpClient login(String user, char[] password) throws sun.net.ftp.FtpProtocolException, IOException {
if (!isConnected()) {
throw new sun.net.ftp.FtpProtocolException("Not connected yet", FtpReplyCode.BAD_SEQUENCE);
}
if (user == null || user.isEmpty()) {
throw new IllegalArgumentException("User name can't be null or empty");
}
tryLogin(user, password);
// keep the welcome message around so we can
// put it in the resulting HTML page.
String l;
StringBuilder sb = new StringBuilder();
for (int i = 0; i < serverResponse.size(); i++) {
l = serverResponse.elementAt(i);
if (l != null) {
if (l.length() >= 4 && l.startsWith("230")) {
// get rid of the "230-" prefix
l = l.substring(4);
}
sb.append(l);
}
}
welcomeMsg = sb.toString();
loggedIn = true;
return this;
}
/**
* Attempts to log on the server with the specified user name, password and
* account name.
*
* @param user The user name
* @param password The password for that user.
* @param account The account name for that user.
* @return <code>true</code> if the login was successful.
* @throws IOException if an error occurs during the transmission.
*/
public sun.net.ftp.FtpClient login(String user, char[] password, String account) throws sun.net.ftp.FtpProtocolException, IOException {
if (!isConnected()) {
throw new sun.net.ftp.FtpProtocolException("Not connected yet", FtpReplyCode.BAD_SEQUENCE);
}
if (user == null || user.isEmpty()) {
throw new IllegalArgumentException("User name can't be null or empty");
}
tryLogin(user, password);
/*
* Checks for "332 Need account for login." answer
*/
if (lastReplyCode == FtpReplyCode.NEED_ACCOUNT) {
issueCommandCheck("ACCT " + account);
}
// keep the welcome message around so we can
// put it in the resulting HTML page.
StringBuilder sb = new StringBuilder();
if (serverResponse != null) {
for (String l : serverResponse) {
if (l != null) {
if (l.length() >= 4 && l.startsWith("230")) {
// get rid of the "230-" prefix
l = l.substring(4);
}
sb.append(l);
}
}
}
welcomeMsg = sb.toString();
loggedIn = true;
return this;
}
/**
* Logs out the current user. This is in effect terminates the current
* session and the connection to the server will be closed.
*
*/
public void close() throws IOException {
if (isConnected()) {
try {
issueCommand("QUIT");
} catch (FtpProtocolException e) {
}
loggedIn = false;
}
disconnect();
}
/**
* Checks whether the client is logged in to the server or not.
*
* @return <code>true</code> if the client has already completed a login.
*/
public boolean isLoggedIn() {
return loggedIn;
}
/**
* Changes to a specific directory on a remote FTP server
*
* @param remoteDirectory path of the directory to CD to.
* @return <code>true</code> if the operation was successful.
* @exception <code>FtpProtocolException</code>
*/
public sun.net.ftp.FtpClient changeDirectory(String remoteDirectory) throws sun.net.ftp.FtpProtocolException, IOException {
if (remoteDirectory == null || remoteDirectory.isEmpty()) {
throw new IllegalArgumentException("directory can't be null or empty");
}
issueCommandCheck("CWD " + remoteDirectory);
return this;
}
/**
* Changes to the parent directory, sending the CDUP command to the server.
*
* @return <code>true</code> if the command was successful.
* @throws IOException
*/
public sun.net.ftp.FtpClient changeToParentDirectory() throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("CDUP");
return this;
}
/**
* Returns the server current working directory, or <code>null</code> if
* the PWD command failed.
*
* @return a <code>String</code> containing the current working directory,
* or <code>null</code>
* @throws IOException
*/
public String getWorkingDirectory() throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("PWD");
/*
* answer will be of the following format :
*
* 257 "/" is current directory.
*/
String answ = getResponseString();
if (!answ.startsWith("257")) {
return null;
}
return answ.substring(5, answ.lastIndexOf('"'));
}
/**
* Sets the restart offset to the specified value. That value will be
* sent through a <code>REST</code> command to server before a file
* transfer and has the effect of resuming a file transfer from the
* specified point. After a transfer the restart offset is set back to
* zero.
*
* @param offset the offset in the remote file at which to start the next
* transfer. This must be a value greater than or equal to zero.
* @throws IllegalArgumentException if the offset is negative.
*/
public sun.net.ftp.FtpClient setRestartOffset(long offset) {
if (offset < 0) {
throw new IllegalArgumentException("offset can't be negative");
}
restartOffset = offset;
return this;
}
/**
* Retrieves a file from the ftp server and writes it to the specified
* <code>OutputStream</code>.
* If the restart offset was set, then a <code>REST</code> command will be
* sent before the RETR in order to restart the transfer from the specified
* offset.
* The <code>OutputStream</code> is not closed by this method at the end
* of the transfer.
*
* @param name a {@code String} containing the name of the file to
* retrieve from the server.
* @param local the <code>OutputStream</code> the file should be written to.
* @throws IOException if the transfer fails.
*/
public sun.net.ftp.FtpClient getFile(String name, OutputStream local) throws sun.net.ftp.FtpProtocolException, IOException {
if (restartOffset > 0) {
Socket s;
try {
s = openDataConnection("REST " + restartOffset);
} finally {
restartOffset = 0;
}
issueCommandCheck("RETR " + name);
getTransferSize();
try (InputStream remote = createInputStream(s.getInputStream())) {
remote.transferTo(local);
}
} else {
Socket s = openDataConnection("RETR " + name);
getTransferSize();
try (InputStream remote = createInputStream(s.getInputStream())) {
remote.transferTo(local);
}
}
return completePending();
}
/**
* Retrieves a file from the ftp server, using the RETR command, and
* returns the InputStream from* the established data connection.
* {@link #completePending()} <b>has</b> to be called once the application
* is done reading from the returned stream.
*
* @param name the name of the remote file
* @return the {@link java.io.InputStream} from the data connection, or
* <code>null</code> if the command was unsuccessful.
* @throws IOException if an error occurred during the transmission.
*/
public InputStream getFileStream(String name) throws sun.net.ftp.FtpProtocolException, IOException {
Socket s;
if (restartOffset > 0) {
try {
s = openDataConnection("REST " + restartOffset);
} finally {
restartOffset = 0;
}
if (s == null) {
return null;
}
issueCommandCheck("RETR " + name);
getTransferSize();
return createInputStream(s.getInputStream());
}
s = openDataConnection("RETR " + name);
if (s == null) {
return null;
}
getTransferSize();
return createInputStream(s.getInputStream());
}
/**
* Transfers a file from the client to the server (aka a <I>put</I>)
* by sending the STOR or STOU command, depending on the
* <code>unique</code> argument, and returns the <code>OutputStream</code>
* from the established data connection.
* {@link #completePending()} <b>has</b> to be called once the application
* is finished writing to the stream.
*
* A new file is created at the server site if the file specified does
* not already exist.
*
* If <code>unique</code> is set to <code>true</code>, the resultant file
* is to be created under a name unique to that directory, meaning
* it will not overwrite an existing file, instead the server will
* generate a new, unique, file name.
* The name of the remote file can be retrieved, after completion of the
* transfer, by calling {@link #getLastFileName()}.
*
* @param name the name of the remote file to write.
* @param unique <code>true</code> if the remote files should be unique,
* in which case the STOU command will be used.
* @return the {@link java.io.OutputStream} from the data connection or
* <code>null</code> if the command was unsuccessful.
* @throws IOException if an error occurred during the transmission.
*/
public OutputStream putFileStream(String name, boolean unique)
throws sun.net.ftp.FtpProtocolException, IOException
{
String cmd = unique ? "STOU " : "STOR ";
Socket s = openDataConnection(cmd + name);
if (s == null) {
return null;
}
boolean bm = (type == TransferType.BINARY);
return new sun.net.TelnetOutputStream(s.getOutputStream(), bm);
}
/**
* Transfers a file from the client to the server (aka a <I>put</I>)
* by sending the STOR command. The content of the <code>InputStream</code>
* passed in argument is written into the remote file, overwriting any
* existing data.
*
* A new file is created at the server site if the file specified does
* not already exist.
*
* @param name the name of the remote file to write.
* @param local the <code>InputStream</code> that points to the data to
* transfer.
* @param unique <code>true</code> if the remote file should be unique
* (i.e. not already existing), <code>false</code> otherwise.
* @return <code>true</code> if the transfer was successful.
* @throws IOException if an error occurred during the transmission.
* @see #getLastFileName()
*/
public sun.net.ftp.FtpClient putFile(String name, InputStream local, boolean unique) throws sun.net.ftp.FtpProtocolException, IOException {
String cmd = unique ? "STOU " : "STOR ";
if (type == TransferType.BINARY) {
Socket s = openDataConnection(cmd + name);
try (OutputStream remote = createOutputStream(s.getOutputStream())) {
local.transferTo(remote);
}
}
return completePending();
}
/**
* Sends the APPE command to the server in order to transfer a data stream
* passed in argument and append it to the content of the specified remote
* file.
*
* @param name A <code>String</code> containing the name of the remote file
* to append to.
* @param local The <code>InputStream</code> providing access to the data
* to be appended.
* @return <code>true</code> if the transfer was successful.
* @throws IOException if an error occurred during the transmission.
*/
public sun.net.ftp.FtpClient appendFile(String name, InputStream local) throws sun.net.ftp.FtpProtocolException, IOException {
Socket s = openDataConnection("APPE " + name);
try (OutputStream remote = createOutputStream(s.getOutputStream())) {
local.transferTo(remote);
}
return completePending();
}
/**
* Renames a file on the server.
*
* @param from the name of the file being renamed
* @param to the new name for the file
* @throws IOException if the command fails
*/
public sun.net.ftp.FtpClient rename(String from, String to) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("RNFR " + from);
issueCommandCheck("RNTO " + to);
return this;
}
/**
* Deletes a file on the server.
*
* @param name a <code>String</code> containing the name of the file
* to delete.
* @return <code>true</code> if the command was successful
* @throws IOException if an error occurred during the exchange
*/
public sun.net.ftp.FtpClient deleteFile(String name) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("DELE " + name);
return this;
}
/**
* Creates a new directory on the server.
*
* @param name a <code>String</code> containing the name of the directory
* to create.
* @return <code>true</code> if the operation was successful.
* @throws IOException if an error occurred during the exchange
*/
public sun.net.ftp.FtpClient makeDirectory(String name) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("MKD " + name);
return this;
}
/**
* Removes a directory on the server.
*
* @param name a <code>String</code> containing the name of the directory
* to remove.
*
* @return <code>true</code> if the operation was successful.
* @throws IOException if an error occurred during the exchange.
*/
public sun.net.ftp.FtpClient removeDirectory(String name) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("RMD " + name);
return this;
}
/**
* Sends a No-operation command. It's useful for testing the connection
* status or as a <I>keep alive</I> mechanism.
*
* @throws FtpProtocolException if the command fails
*/
public sun.net.ftp.FtpClient noop() throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("NOOP");
return this;
}
/**
* Sends the STAT command to the server.
* This can be used while a data connection is open to get a status
* on the current transfer, in that case the parameter should be
* <code>null</code>.
* If used between file transfers, it may have a pathname as argument
* in which case it will work as the LIST command except no data
* connection will be created.
*
* @param name an optional <code>String</code> containing the pathname
* the STAT command should apply to.
* @return the response from the server or <code>null</code> if the
* command failed.
* @throws IOException if an error occurred during the transmission.
*/
public String getStatus(String name) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck((name == null ? "STAT" : "STAT " + name));
/*
* A typical response will be:
* 213-status of t32.gif:
* -rw-r--r-- 1 jcc staff 247445 Feb 17 1998 t32.gif
* 213 End of Status
*
* or
*
* 211-jsn FTP server status:
* Version wu-2.6.2+Sun
* Connected to localhost (::1)
* Logged in as jccollet
* TYPE: ASCII, FORM: Nonprint; STRUcture: File; transfer MODE: Stream
* No data connection
* 0 data bytes received in 0 files
* 0 data bytes transmitted in 0 files
* 0 data bytes total in 0 files
* 53 traffic bytes received in 0 transfers
* 485 traffic bytes transmitted in 0 transfers
* 587 traffic bytes total in 0 transfers
* 211 End of status
*
* So we need to remove the 1st and last line
*/
Vector<String> resp = getResponseStrings();
StringBuilder sb = new StringBuilder();
for (int i = 1; i < resp.size() - 1; i++) {
sb.append(resp.get(i));
}
return sb.toString();
}
/**
* Sends the FEAT command to the server and returns the list of supported
* features in the form of strings.
*
* The features are the supported commands, like AUTH TLS, PROT or PASV.
* See the RFCs for a complete list.
*
* Note that not all FTP servers support that command, in which case
* the method will return <code>null</code>
*
* @return a <code>List</code> of <code>Strings</code> describing the
* supported additional features, or <code>null</code>
* if the command is not supported.
* @throws IOException if an error occurs during the transmission.
*/
public List<String> getFeatures() throws sun.net.ftp.FtpProtocolException, IOException {
/*
* The FEAT command, when implemented will return something like:
*
* 211-Features:
* AUTH TLS
* PBSZ
* PROT
* EPSV
* EPRT
* PASV
* REST STREAM
* 211 END
*/
ArrayList<String> features = new ArrayList<String>();
issueCommandCheck("FEAT");
Vector<String> resp = getResponseStrings();
// Note that we start at index 1 to skip the 1st line (211-...)
// and we stop before the last line.
for (int i = 1; i < resp.size() - 1; i++) {
String s = resp.get(i);
// Get rid of leading space and trailing newline
features.add(s.substring(1, s.length() - 1));
}
return features;
}
/**
* sends the ABOR command to the server.
* It tells the server to stop the previous command or transfer.
*
* @return <code>true</code> if the command was successful.
* @throws IOException if an error occurred during the transmission.
*/
public sun.net.ftp.FtpClient abort() throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("ABOR");
// TODO: Must check the ReplyCode:
/*
* From the RFC:
* There are two cases for the server upon receipt of this
* command: (1) the FTP service command was already completed,
* or (2) the FTP service command is still in progress.
* In the first case, the server closes the data connection
* (if it is open) and responds with a 226 reply, indicating
* that the abort command was successfully processed.
* In the second case, the server aborts the FTP service in
* progress and closes the data connection, returning a 426
* reply to indicate that the service request terminated
* abnormally. The server then sends a 226 reply,
* indicating that the abort command was successfully
* processed.
*/
return this;
}
/**
* Some methods do not wait until completion before returning, so this
* method can be called to wait until completion. This is typically the case
* with commands that trigger a transfer like {@link #getFileStream(String)}.
* So this method should be called before accessing information related to
* such a command.
* <p>This method will actually block reading on the command channel for a
* notification from the server that the command is finished. Such a
* notification often carries extra information concerning the completion
* of the pending action (e.g. number of bytes transferred).</p>
* <p>Note that this will return true immediately if no command or action
* is pending</p>
* <p>It should be also noted that most methods issuing commands to the ftp
* server will call this method if a previous command is pending.
* <p>Example of use:
* <pre>
* InputStream in = cl.getFileStream("file");
* ...
* cl.completePending();
* long size = cl.getLastTransferSize();
* </pre>
* On the other hand, it's not necessary in a case like:
* <pre>
* InputStream in = cl.getFileStream("file");
* // read content
* ...
* cl.logout();
* </pre>
* <p>Since {@link #logout()} will call completePending() if necessary.</p>
* @return <code>true</code> if the completion was successful or if no
* action was pending.
* @throws IOException
*/
public sun.net.ftp.FtpClient completePending() throws sun.net.ftp.FtpProtocolException, IOException {
while (replyPending) {
replyPending = false;
if (!readReply()) {
throw new sun.net.ftp.FtpProtocolException(getLastResponseString(), lastReplyCode);
}
}
return this;
}
/**
* Reinitializes the USER parameters on the FTP server
*
* @throws FtpProtocolException if the command fails
*/
public sun.net.ftp.FtpClient reInit() throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("REIN");
loggedIn = false;
if (useCrypto) {
if (server instanceof SSLSocket) {
javax.net.ssl.SSLSession session = ((SSLSocket) server).getSession();
session.invalidate();
// Restore previous socket and streams
server = oldSocket;
oldSocket = null;
try {
out = new PrintStream(new BufferedOutputStream(server.getOutputStream()),
true, encoding);
} catch (UnsupportedEncodingException e) {
throw new InternalError(encoding + "encoding not found", e);
}
in = new BufferedInputStream(server.getInputStream());
}
}
useCrypto = false;
return this;
}
/**
* Changes the transfer type (binary, ascii, ebcdic) and issue the
* proper command (e.g. TYPE A) to the server.
*
* @param type the <code>FtpTransferType</code> to use.
* @return This FtpClient
* @throws IOException if an error occurs during transmission.
*/
public sun.net.ftp.FtpClient setType(TransferType type) throws sun.net.ftp.FtpProtocolException, IOException {
String cmd = "NOOP";
this.type = type;
if (type == TransferType.ASCII) {
cmd = "TYPE A";
}
if (type == TransferType.BINARY) {
cmd = "TYPE I";
}
if (type == TransferType.EBCDIC) {
cmd = "TYPE E";
}
issueCommandCheck(cmd);
return this;
}
/**
* Issues a LIST command to the server to get the current directory
* listing, and returns the InputStream from the data connection.
* {@link #completePending()} <b>has</b> to be called once the application
* is finished writing to the stream.
*
* @param path the pathname of the directory to list, or <code>null</code>
* for the current working directory.
* @return the <code>InputStream</code> from the resulting data connection
* @throws IOException if an error occurs during the transmission.
* @see #changeDirectory(String)
* @see #listFiles(String)
*/
public InputStream list(String path) throws sun.net.ftp.FtpProtocolException, IOException {
Socket s;
s = openDataConnection(path == null ? "LIST" : "LIST " + path);
if (s != null) {
return createInputStream(s.getInputStream());
}
return null;
}
/**
* Issues a NLST path command to server to get the specified directory
* content. It differs from {@link #list(String)} method by the fact that
* it will only list the file names which would make the parsing of the
* somewhat easier.
*
* {@link #completePending()} <b>has</b> to be called once the application
* is finished writing to the stream.
*
* @param path a <code>String</code> containing the pathname of the
* directory to list or <code>null</code> for the current working
* directory.
* @return the <code>InputStream</code> from the resulting data connection
* @throws IOException if an error occurs during the transmission.
*/
public InputStream nameList(String path) throws sun.net.ftp.FtpProtocolException, IOException {
Socket s;
s = openDataConnection(path == null ? "NLST" : "NLST " + path);
if (s != null) {
return createInputStream(s.getInputStream());
}
return null;
}
/**
* Issues the SIZE [path] command to the server to get the size of a
* specific file on the server.
* Note that this command may not be supported by the server. In which
* case -1 will be returned.
*
* @param path a <code>String</code> containing the pathname of the
* file.
* @return a <code>long</code> containing the size of the file or -1 if
* the server returned an error, which can be checked with
* {@link #getLastReplyCode()}.
* @throws IOException if an error occurs during the transmission.
*/
public long getSize(String path) throws sun.net.ftp.FtpProtocolException, IOException {
if (path == null || path.isEmpty()) {
throw new IllegalArgumentException("path can't be null or empty");
}
issueCommandCheck("SIZE " + path);
if (lastReplyCode == FtpReplyCode.FILE_STATUS) {
String s = getResponseString();
s = s.substring(4, s.length() - 1);
return Long.parseLong(s);
}
return -1;
}
private static final DateTimeFormatter RFC3659_DATETIME_FORMAT = DateTimeFormatter.ofPattern("yyyyMMddHHmmss[.SSS]")
.withZone(ZoneOffset.UTC);
/**
* Issues the MDTM [path] command to the server to get the modification
* time of a specific file on the server.
* Note that this command may not be supported by the server, in which
* case <code>null</code> will be returned.
*
* @param path a <code>String</code> containing the pathname of the file.
* @return a <code>Date</code> representing the last modification time
* or <code>null</code> if the server returned an error, which
* can be checked with {@link #getLastReplyCode()}.
* @throws IOException if an error occurs during the transmission.
*/
public Date getLastModified(String path) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("MDTM " + path);
if (lastReplyCode == FtpReplyCode.FILE_STATUS) {
String s = getResponseString();
return parseRfc3659TimeValue(s.substring(4, s.length() - 1));
}
return null;
}
private static Date parseRfc3659TimeValue(String s) {
Date result = null;
try {
var d = ZonedDateTime.parse(s, RFC3659_DATETIME_FORMAT);
result = Date.from(d.toInstant());
} catch (DateTimeParseException ex) {
}
return result;
}
/**
* Sets the parser used to handle the directory output to the specified
* one. By default the parser is set to one that can handle most FTP
* servers output (Unix base mostly). However it may be necessary for
* and application to provide its own parser due to some uncommon
* output format.
*
* @param p The <code>FtpDirParser</code> to use.
* @see #listFiles(String)
*/
public sun.net.ftp.FtpClient setDirParser(FtpDirParser p) {
parser = p;
return this;
}
private static class FtpFileIterator implements Iterator<FtpDirEntry>, Closeable {
private BufferedReader in = null;
private FtpDirEntry nextFile = null;
private FtpDirParser fparser = null;
private boolean eof = false;
public FtpFileIterator(FtpDirParser p, BufferedReader in) {
this.in = in;
this.fparser = p;
readNext();
}
private void readNext() {
nextFile = null;
if (eof) {
return;
}
String line = null;
try {
do {
line = in.readLine();
if (line != null) {
nextFile = fparser.parseLine(line);
if (nextFile != null) {
return;
}
}
} while (line != null);
in.close();
} catch (IOException iOException) {
}
eof = true;
}
public boolean hasNext() {
return nextFile != null;
}
public FtpDirEntry next() {
FtpDirEntry ret = nextFile;
readNext();
return ret;
}
public void remove() {
throw new UnsupportedOperationException("Not supported yet.");
}
public void close() throws IOException {
if (in != null && !eof) {
in.close();
}
eof = true;
nextFile = null;
}
}
/**
* Issues a MLSD command to the server to get the specified directory
* listing and applies the current parser to create an Iterator of
* {@link java.net.ftp.FtpDirEntry}. Note that the Iterator returned is also a
* {@link java.io.Closeable}.
* If the server doesn't support the MLSD command, the LIST command is used
* instead.
*
* {@link #completePending()} <b>has</b> to be called once the application
* is finished iterating through the files.
*
* @param path the pathname of the directory to list or <code>null</code>
* for the current working directory.
* @return a <code>Iterator</code> of files or <code>null</code> if the
* command failed.
* @throws IOException if an error occurred during the transmission
* @see #setDirParser(FtpDirParser)
* @see #changeDirectory(String)
*/
public Iterator<FtpDirEntry> listFiles(String path) throws sun.net.ftp.FtpProtocolException, IOException {
Socket s = null;
BufferedReader sin = null;
try {
s = openDataConnection(path == null ? "MLSD" : "MLSD " + path);
} catch (sun.net.ftp.FtpProtocolException FtpException) {
// The server doesn't understand new MLSD command, ignore and fall
// back to LIST
}
if (s != null) {
sin = new BufferedReader(new InputStreamReader(s.getInputStream()));
return new FtpFileIterator(mlsxParser, sin);
} else {
s = openDataConnection(path == null ? "LIST" : "LIST " + path);
if (s != null) {
sin = new BufferedReader(new InputStreamReader(s.getInputStream()));
return new FtpFileIterator(parser, sin);
}
}
return null;
}
private boolean sendSecurityData(byte[] buf) throws IOException,
sun.net.ftp.FtpProtocolException {
String s = Base64.getMimeEncoder().encodeToString(buf);
return issueCommand("ADAT " + s);
}
private byte[] getSecurityData() {
String s = getLastResponseString();
if (s.substring(4, 9).equalsIgnoreCase("ADAT=")) {
// Need to get rid of the leading '315 ADAT='
// and the trailing newline
return Base64.getMimeDecoder().decode(s.substring(9, s.length() - 1));
}
return null;
}
/**
* Attempts to use Kerberos GSSAPI as an authentication mechanism with the
* ftp server. This will issue an <code>AUTH GSSAPI</code> command, and if
* it is accepted by the server, will followup with <code>ADAT</code>
* command to exchange the various tokens until authentication is
* successful. This conforms to Appendix I of RFC 2228.
*
* @return <code>true</code> if authentication was successful.
* @throws IOException if an error occurs during the transmission.
*/
public sun.net.ftp.FtpClient useKerberos() throws sun.net.ftp.FtpProtocolException, IOException {
/*
* Comment out for the moment since it's not in use and would create
* needless cross-package links.
*
issueCommandCheck("AUTH GSSAPI");
if (lastReplyCode != FtpReplyCode.NEED_ADAT)
throw new sun.net.ftp.FtpProtocolException("Unexpected reply from server");
try {
GSSManager manager = GSSManager.getInstance();
GSSName name = manager.createName("SERVICE:ftp@"+
serverAddr.getHostName(), null);
GSSContext context = manager.createContext(name, null, null,
GSSContext.DEFAULT_LIFETIME);
context.requestMutualAuth(true);
context.requestReplayDet(true);
context.requestSequenceDet(true);
context.requestCredDeleg(true);
byte []inToken = new byte[0];
while (!context.isEstablished()) {
byte[] outToken
= context.initSecContext(inToken, 0, inToken.length);
// send the output token if generated
if (outToken != null) {
if (sendSecurityData(outToken)) {
inToken = getSecurityData();
}
}
}
loggedIn = true;
} catch (GSSException e) {
}
*/
return this;
}
/**
* Returns the Welcome string the server sent during initial connection.
*
* @return a <code>String</code> containing the message the server
* returned during connection or <code>null</code>.
*/
public String getWelcomeMsg() {
return welcomeMsg;
}
/**
* Returns the last reply code sent by the server.
*
* @return the lastReplyCode
*/
public FtpReplyCode getLastReplyCode() {
return lastReplyCode;
}
/**
* Returns the last response string sent by the server.
*
* @return the message string, which can be quite long, last returned
* by the server.
*/
public String getLastResponseString() {
StringBuilder sb = new StringBuilder();
if (serverResponse != null) {
for (String l : serverResponse) {
if (l != null) {
sb.append(l);
}
}
}
return sb.toString();
}
/**
* Returns, when available, the size of the latest started transfer.
* This is retrieved by parsing the response string received as an initial
* response to a RETR or similar request.
*
* @return the size of the latest transfer or -1 if either there was no
* transfer or the information was unavailable.
*/
public long getLastTransferSize() {
return lastTransSize;
}
/**
* Returns, when available, the remote name of the last transferred file.
* This is mainly useful for "put" operation when the unique flag was
* set since it allows to recover the unique file name created on the
* server which may be different from the one submitted with the command.
*
* @return the name the latest transferred file remote name, or
* <code>null</code> if that information is unavailable.
*/
public String getLastFileName() {
return lastFileName;
}
/**
* Attempts to switch to a secure, encrypted connection. This is done by
* sending the "AUTH TLS" command.
* <p>See <a href="http://www.ietf.org/rfc/rfc4217.txt">RFC 4217</a></p>
* If successful this will establish a secure command channel with the
* server, it will also make it so that all other transfers (e.g. a RETR
* command) will be done over an encrypted channel as well unless a
* {@link #reInit()} command or a {@link #endSecureSession()} command is issued.
*
* @return <code>true</code> if the operation was successful.
* @throws IOException if an error occurred during the transmission.
* @see #endSecureSession()
*/
public sun.net.ftp.FtpClient startSecureSession() throws sun.net.ftp.FtpProtocolException, IOException {
if (!isConnected()) {
throw new sun.net.ftp.FtpProtocolException("Not connected yet", FtpReplyCode.BAD_SEQUENCE);
}
if (sslFact == null) {
try {
sslFact = (SSLSocketFactory) SSLSocketFactory.getDefault();
} catch (Exception e) {
throw new IOException(e.getLocalizedMessage());
}
}
issueCommandCheck("AUTH TLS");
Socket s = null;
try {
s = sslFact.createSocket(server, serverAddr.getHostName(), serverAddr.getPort(), true);
} catch (javax.net.ssl.SSLException ssle) {
try {
disconnect();
} catch (Exception e) {
}
throw ssle;
}
// Remember underlying socket so we can restore it later
oldSocket = server;
server = s;
try {
out = new PrintStream(new BufferedOutputStream(server.getOutputStream()),
true, encoding);
} catch (UnsupportedEncodingException e) {
throw new InternalError(encoding + "encoding not found", e);
}
in = new BufferedInputStream(server.getInputStream());
issueCommandCheck("PBSZ 0");
issueCommandCheck("PROT P");
useCrypto = true;
return this;
}
/**
* Sends a <code>CCC</code> command followed by a <code>PROT C</code>
* command to the server terminating an encrypted session and reverting
* back to a non encrypted transmission.
*
* @return <code>true</code> if the operation was successful.
* @throws IOException if an error occurred during transmission.
* @see #startSecureSession()
*/
public sun.net.ftp.FtpClient endSecureSession() throws sun.net.ftp.FtpProtocolException, IOException {
if (!useCrypto) {
return this;
}
issueCommandCheck("CCC");
issueCommandCheck("PROT C");
useCrypto = false;
// Restore previous socket and streams
server = oldSocket;
oldSocket = null;
try {
out = new PrintStream(new BufferedOutputStream(server.getOutputStream()),
true, encoding);
} catch (UnsupportedEncodingException e) {
throw new InternalError(encoding + "encoding not found", e);
}
in = new BufferedInputStream(server.getInputStream());
return this;
}
/**
* Sends the "Allocate" (ALLO) command to the server telling it to
* pre-allocate the specified number of bytes for the next transfer.
*
* @param size The number of bytes to allocate.
* @return <code>true</code> if the operation was successful.
* @throws IOException if an error occurred during the transmission.
*/
public sun.net.ftp.FtpClient allocate(long size) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("ALLO " + size);
return this;
}
/**
* Sends the "Structure Mount" (SMNT) command to the server. This let the
* user mount a different file system data structure without altering his
* login or accounting information.
*
* @param struct a <code>String</code> containing the name of the
* structure to mount.
* @return <code>true</code> if the operation was successful.
* @throws IOException if an error occurred during the transmission.
*/
public sun.net.ftp.FtpClient structureMount(String struct) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("SMNT " + struct);
return this;
}
/**
* Sends a SYST (System) command to the server and returns the String
* sent back by the server describing the operating system at the
* server.
*
* @return a <code>String</code> describing the OS, or <code>null</code>
* if the operation was not successful.
* @throws IOException if an error occurred during the transmission.
*/
public String getSystem() throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("SYST");
/*
* 215 UNIX Type: L8 Version: SUNOS
*/
String resp = getResponseString();
// Get rid of the leading code and blank
return resp.substring(4);
}
/**
* Sends the HELP command to the server, with an optional command, like
* SITE, and returns the text sent back by the server.
*
* @param cmd the command for which the help is requested or
* <code>null</code> for the general help
* @return a <code>String</code> containing the text sent back by the
* server, or <code>null</code> if the command failed.
* @throws IOException if an error occurred during transmission
*/
public String getHelp(String cmd) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("HELP " + cmd);
/**
*
* HELP
* 214-The following commands are implemented.
* USER EPRT STRU ALLO DELE SYST RMD MDTM ADAT
* PASS EPSV MODE REST CWD STAT PWD PROT
* QUIT LPRT RETR RNFR LIST HELP CDUP PBSZ
* PORT LPSV STOR RNTO NLST NOOP STOU AUTH
* PASV TYPE APPE ABOR SITE MKD SIZE CCC
* 214 Direct comments to ftp-bugs@jsn.
*
* HELP SITE
* 214-The following SITE commands are implemented.
* UMASK HELP GROUPS
* IDLE ALIAS CHECKMETHOD
* CHMOD CDPATH CHECKSUM
* 214 Direct comments to ftp-bugs@jsn.
*/
Vector<String> resp = getResponseStrings();
if (resp.size() == 1) {
// Single line response
return resp.get(0).substring(4);
}
// on multiple lines answers, like the ones above, remove 1st and last
// line, concat the others.
StringBuilder sb = new StringBuilder();
for (int i = 1; i < resp.size() - 1; i++) {
sb.append(resp.get(i).substring(3));
}
return sb.toString();
}
/**
* Sends the SITE command to the server. This is used by the server
* to provide services specific to his system that are essential
* to file transfer.
*
* @param cmd the command to be sent.
* @return <code>true</code> if the command was successful.
* @throws IOException if an error occurred during transmission
*/
public sun.net.ftp.FtpClient siteCmd(String cmd) throws sun.net.ftp.FtpProtocolException, IOException {
issueCommandCheck("SITE " + cmd);
return this;
}
}