/**
* copy a file from remote host to local
*
* @param rfile
* @param lfile
*/
public String scpFrom(String rfile, String lfile) {
if (!connected) {
throw new ActionFailedException("There is no session!");
}
FileOutputStream fos = null;
// When get a rfile which with regular expression, to save the file with the same name as it get
// from the remote server[add by phoebe]
String completeLfile = lfile;
try {
// exec 'scp -f rfile' remotely
String command = "scp -f " + rfile;
Channel channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);
// get I/O streams for remote scp
OutputStream out = channel.getOutputStream();
InputStream in = channel.getInputStream();
channel.connect();
byte[] buf = new byte[1024];
// send '\0'
buf[0] = 0;
out.write(buf, 0, 1);
out.flush();
while (true) {
int c = checkAck(in);
if (c != 'C') {
break;
}
// read '0644 '
in.read(buf, 0, 5);
long filesize = 0L;
while (true) {
if (in.read(buf, 0, 1) < 0) {
// error
break;
}
if (buf[0] == ' ') break;
filesize = filesize * 10L + (long) (buf[0] - '0');
}
String file = null;
for (int i = 0; ; i++) {
in.read(buf, i, 1);
if (buf[i] == (byte) 0x0a) {
file = new String(buf, 0, i);
break;
}
}
// send '\0'
buf[0] = 0;
out.write(buf, 0, 1);
out.flush();
// When get a rfile which with regular expression, to save the file with the same name as it
// get from the remote server[add by phoebe]
if (completeLfile.contains("*")) {
completeLfile = completeLfile.substring(0, completeLfile.lastIndexOf("/")) + "/" + file;
}
// read a content of lfile
fos = new FileOutputStream(completeLfile);
int foo;
while (true) {
if (buf.length < filesize) foo = buf.length;
else foo = (int) filesize;
foo = in.read(buf, 0, foo);
if (foo < 0) {
// error
break;
}
fos.write(buf, 0, foo);
filesize -= foo;
if (filesize == 0L) break;
}
fos.close();
fos = null;
if (checkAck(in) != 0) {
throw new ActionFailedException("Failed to get Ack, Copy may fail!");
}
// send '\0'
buf[0] = 0;
out.write(buf, 0, 1);
out.flush();
}
} catch (IOException e) {
e.printStackTrace();
} catch (JSchException e) {
e.printStackTrace();
} finally {
if (channel != null) {
channel.disconnect();
}
}
return completeLfile;
}
public static void main(String[] arg) {
if (arg.length != 2) {
System.err.println("usage: java ScpFrom user@remotehost:file1 file2");
System.exit(-1);
}
FileOutputStream fos = null;
try {
String user = arg[0].substring(0, arg[0].indexOf('@'));
arg[0] = arg[0].substring(arg[0].indexOf('@') + 1);
String host = arg[0].substring(0, arg[0].indexOf(':'));
String rfile = arg[0].substring(arg[0].indexOf(':') + 1);
String lfile = arg[1];
String prefix = null;
if (new File(lfile).isDirectory()) {
prefix = lfile + File.separator;
}
JSch jsch = new JSch();
Session session = jsch.getSession(user, host, 22);
// username and password will be given via UserInfo interface.
UserInfo ui = new MyUserInfo();
session.setUserInfo(ui);
session.connect();
// exec 'scp -f rfile' remotely
String command = "scp -f " + rfile;
Channel channel = session.openChannel("exec");
((ChannelExec) channel).setCommand(command);
// get I/O streams for remote scp
OutputStream out = channel.getOutputStream();
InputStream in = channel.getInputStream();
channel.connect();
byte[] buf = new byte[1024];
// send '\0'
buf[0] = 0;
out.write(buf, 0, 1);
out.flush();
while (true) {
int c = checkAck(in);
if (c != 'C') {
break;
}
// read '0644 '
in.read(buf, 0, 5);
long filesize = 0L;
while (true) {
if (in.read(buf, 0, 1) < 0) {
// error
break;
}
if (buf[0] == ' ') break;
filesize = filesize * 10L + (long) (buf[0] - '0');
}
String file = null;
for (int i = 0; ; i++) {
in.read(buf, i, 1);
if (buf[i] == (byte) 0x0a) {
file = new String(buf, 0, i);
break;
}
}
// System.out.println("filesize="+filesize+", file="+file);
// send '\0'
buf[0] = 0;
out.write(buf, 0, 1);
out.flush();
// read a content of lfile
fos = new FileOutputStream(prefix == null ? lfile : prefix + file);
int foo;
while (true) {
if (buf.length < filesize) foo = buf.length;
else foo = (int) filesize;
foo = in.read(buf, 0, foo);
if (foo < 0) {
// error
break;
}
fos.write(buf, 0, foo);
filesize -= foo;
if (filesize == 0L) break;
}
fos.close();
fos = null;
if (checkAck(in) != 0) {
System.exit(0);
}
// send '\0'
buf[0] = 0;
out.write(buf, 0, 1);
out.flush();
}
session.disconnect();
System.exit(0);
} catch (Exception e) {
System.out.println(e);
try {
if (fos != null) fos.close();
} catch (Exception ee) {
}
}
}
