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Support for a virtual sessions, custom command execution etc.
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package com.sshtools.server.vsession.commands.sftp;
/*-
* #%L
* Virtual Sessions
* %%
* Copyright (C) 2002 - 2024 JADAPTIVE Limited
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Objects;
import com.sshtools.client.sftp.SftpFile;
import com.sshtools.common.permissions.PermissionDeniedException;
import com.sshtools.common.sftp.SftpStatusException;
import com.sshtools.common.ssh.SshException;
import com.sshtools.server.vsession.CliHelper;
import com.sshtools.server.vsession.UsageException;
import com.sshtools.server.vsession.UsageHelper;
import com.sshtools.server.vsession.VirtualConsole;
public class Ls extends SftpCommand {
private static final String LISTING_LONG_EXTENDED = "extended";
private static final String LISTING_LONG_ALL = "all";
private static final String LISTING_LONG_DIRECTORY = "directory";
private static final String LISTING_LONG_LONG = "long";
private static final String LISTING_SHORT_EXTENDED = "x";
private static final String LISTING_SHORT_ALL = "a";
private static final String LISTING_SHORT_DIRECTORY = "d";
private static final String LISTING_SHORT_LONG = "l";
public Ls() {
super("ls", "SFTP", UsageHelper.build("ls [options] path...",
"-l, --long Show details for each individual file/folder",
"-a, --all Show all files",
"-d, --directory List directories themeselves, not their contents",
"-x, --extended Show extended attributes"),
"List the contents of a directory.");
}
@Override
public void run(String[] args, VirtualConsole console)
throws IOException, PermissionDeniedException, UsageException {
try {
if (args.length == 1) {
SftpFile[] sftpFiles = this.sftp.ls();
processSftpFilesForPrinting(args, console, sftpFiles);
} else {
List paths = new ArrayList<>();
for(int i=1; i (6 * 30 * 24 * 60 * 60 * 1000L)) {
df = new SimpleDateFormat("MMM dd yyyy", console.getConnection().getLocale());
} else {
df = new SimpleDateFormat("MMM dd HH:mm", console.getConnection().getLocale());
}
lastModifiedTime = df.format(new Date(mt));
int linkCount = 0;
console.println(String.format("%s %-3d %-8s %-8s %10d %-14s %-30s",
fileAttributes.toPermissionsString(),
linkCount,
fileAttributes.bestUsername(),
fileAttributes.bestGroup(),
size,
lastModifiedTime,
file.getFilename()));
} else {
console.println(file.getFilename());
}
if(isOption(args, LISTING_SHORT_EXTENDED) || isOption(args, LISTING_LONG_EXTENDED)) {
for(var name : fileAttributes.extendedAttributes().keySet()) {
var val = fileAttributes.extendedAttributes().get(name);
console.println(String.format("%" + (CliHelper.hasShortOption(args,'l') ? 64 : 4)+ "s%s", "", name.toString() + "=" + (val == null ? "" : val.toString())));
}
}
}
}
private boolean isHidden(SftpFile sftpFile) throws SftpStatusException, SshException {
var fileAttributes = sftpFile.attributes();
if (fileAttributes.hasAttributeBits() && fileAttributes.isHidden()) {
return true;
}
if (sftpFile.getFilename().startsWith(".")) {
return true;
}
return false;
}
private static boolean isOption(String[] args, String option) {
for(String arg : args) {
if(arg.startsWith("--")) {
String value = arg.substring(2);
return isMatchinLongOptionValue(option, value);
} else if(arg.startsWith("-")) {
String value = arg.substring(1);
return isMatchinShortOption(option, value);
}
}
return false;
}
private static boolean isMatchinShortOption(String option, String value) {
String[] parts = value.split("");
boolean result = false;
for (String part : parts) {
switch (option) {
case LISTING_SHORT_LONG:
result = isShortL(part);
break;
case LISTING_SHORT_DIRECTORY:
result = isShortD(part);
break;
case LISTING_SHORT_ALL:
result = isShortA(part);
break;
case LISTING_SHORT_EXTENDED:
result = isShortX(part);
break;
default:
result = false;
}
if (result) return true;
}
return result;
}
private static boolean isMatchinLongOptionValue(String option, String value) {
switch (option) {
case LISTING_LONG_LONG:
return isLongL(value);
case LISTING_LONG_DIRECTORY:
return isLongD(value);
case LISTING_LONG_ALL:
return isLongA(value);
case LISTING_LONG_EXTENDED:
return isLongX(value);
default:
return false;
}
}
private static boolean isLsOption(String arg) {
if(arg.startsWith("--")) {
return isLsLongOption(arg.substring(2));
} else if(arg.startsWith("-")) {
return isLsShortOption(arg.substring(1));
}
return false;
}
private static boolean isLsLongOption(String arg) {
return (isLongL(arg) || isLongD(arg)
|| isLongA(arg) || isLongX(arg));
}
private static boolean isLsShortOption(String arg) {
String[] parts = arg.split("");
for (String part: parts) {
if (isShortL(part) || isShortD(part) || isShortA(part) || isShortX(part)) {
return true;
}
}
return false;
}
private static boolean isShortL(String value) {
return Objects.equals(LISTING_SHORT_LONG, value);
}
private static boolean isShortD(String value) {
return Objects.equals(LISTING_SHORT_DIRECTORY, value);
}
private static boolean isShortA(String value) {
return Objects.equals(LISTING_SHORT_ALL, value);
}
private static boolean isShortX(String value) {
return Objects.equals(LISTING_SHORT_EXTENDED, value);
}
private static boolean isLongL(String value) {
return Objects.equals(LISTING_LONG_LONG, value);
}
private static boolean isLongD(String value) {
return Objects.equals(LISTING_LONG_DIRECTORY, value);
}
private static boolean isLongA(String value) {
return Objects.equals(LISTING_LONG_ALL, value);
}
private static boolean isLongX(String value) {
return Objects.equals(LISTING_LONG_EXTENDED, value);
}
}