org.apache.sshd.server.subsystem.sftp

Class AbstractSftpSubsystemHelper

java.lang.Object

org.apache.sshd.common.util.logging.AbstractLoggingBean

org.apache.sshd.server.subsystem.sftp.AbstractSftpSubsystemHelper

All Implemented Interfaces:

SessionContextHolder, SessionHolder<ServerSession>, ServerSessionHolder, SftpEventListenerManager, SftpSubsystemEnvironment, SftpSubsystemProxy

Direct Known Subclasses:

SftpSubsystem

public abstract class AbstractSftpSubsystemHelper
extends AbstractLoggingBean
implements SftpSubsystemProxy

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ACL_SUPPORTED_MASK_PROP Comma separate list of SSH_ACL_CAP_xxx names - where name can be without the prefix.
static java.lang.String	AUTO_FOLLOW_LINKS Whether to automatically follow symbolic links when resolving paths
static java.lang.String	CLIENT_EXTENSIONS_PROP Allows controlling reports of which client extensions are supported (and reported via "support" and "support2" server extensions) as a comma-separate list of names.
static java.util.Set<java.lang.Integer>	DEFAULT_ACL_SUPPORTED_MASK
static boolean	DEFAULT_AUTO_FOLLOW_LINKS Default value of "sftp-auto-follow-links"
static int	DEFAULT_MAX_READDATA_PACKET_LENGTH
static java.util.List<AbstractOpenSSHExtensionParser.OpenSSHExtension>	DEFAULT_OPEN_SSH_EXTENSIONS
static java.util.List<java.lang.String>	DEFAULT_OPEN_SSH_EXTENSIONS_NAMES
static java.util.NavigableMap<java.lang.String,OptionalFeature>	DEFAULT_SUPPORTED_CLIENT_EXTENSIONS The default reported supported client extensions (case insensitive)
private SftpErrorStatusDataHandler	errorStatusDataHandler
private SftpFileSystemAccessor	fileSystemAccessor
static java.lang.String	MAX_READDATA_PACKET_LENGTH_PROP Force the use of a max.
static java.lang.String	NEWLINE_VALUE Property that can be used to set the reported NL value.
static java.lang.String	OPENSSH_EXTENSIONS_PROP Comma-separated list of which OpenSSH extensions are reported and what version is reported for each - format: name=version.
private SftpEventListener	sftpEventListenerProxy
private java.util.Collection<SftpEventListener>	sftpEventListeners
private UnsupportedAttributePolicy	unsupportedAttributePolicy

Fields inherited from class org.apache.sshd.common.util.logging.AbstractLoggingBean

log

Fields inherited from interface org.apache.sshd.server.subsystem.sftp.SftpSubsystemEnvironment

ALL_SFTP_IMPL, HIGHER_SFTP_IMPL, LOWER_SFTP_IMPL, SFTP_VERSION, SUPPORTED_SFTP_VERSIONS

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractSftpSubsystemHelper(UnsupportedAttributePolicy policy, SftpFileSystemAccessor accessor, SftpErrorStatusDataHandler handler)

Method Summary

Modifier and Type	Method and Description
protected java.util.NavigableMap<java.lang.String,java.lang.Object>	addMissingAttribute(java.nio.file.Path file, java.util.NavigableMap<java.lang.String,java.lang.Object> current, java.lang.String name, FileInfoExtractor<?> x, java.nio.file.LinkOption... options)
boolean	addSftpEventListener(SftpEventListener listener) Register a listener instance
protected int	appendAclSupportedExtension(Buffer buffer, ServerSession session)
protected void	appendExtensions(Buffer buffer, java.lang.String supportedVersions)
protected void	appendNewlineExtension(Buffer buffer, ServerSession session) Appends the "newline" extension to the buffer.
protected java.util.List<AbstractOpenSSHExtensionParser.OpenSSHExtension>	appendOpenSSHExtensions(Buffer buffer, ServerSession session)
protected void	appendSupported2Extension(Buffer buffer, java.util.Collection<java.lang.String> extras) Appends the "supported2" extension to the buffer.
protected void	appendSupportedExtension(Buffer buffer, java.util.Collection<java.lang.String> extras) Appends the "supported" extension to the buffer.
protected void	appendVendorIdExtension(Buffer buffer, java.util.Map<java.lang.String,?> versionProperties, ServerSession session) Appends the "vendor-id" extension to the buffer.
protected void	appendVersionsExtension(Buffer buffer, java.lang.String value, ServerSession session) Appends the "versions" extension to the buffer.
protected java.util.Map.Entry<java.lang.Integer,java.lang.String>	checkVersionCompatibility(Buffer buffer, int id, int proposed, int failureOpcode) Checks if a proposed version is within supported range.
protected abstract void	createLink(int id, java.lang.String existingPath, java.lang.String linkPath, boolean symLink)
protected void	doBlock(Buffer buffer, int id)
protected abstract void	doBlock(int id, java.lang.String handle, long offset, long length, int mask)
protected void	doCheckFileHash(Buffer buffer, int id, java.lang.String targetType)
protected void	doCheckFileHash(int id, java.nio.file.Path file, NamedFactory<? extends Digest> factory, long startOffset, long length, int blockSize, Buffer buffer)
protected abstract void	doCheckFileHash(int id, java.lang.String targetType, java.lang.String target, java.util.Collection<java.lang.String> algos, long startOffset, long length, int blockSize, Buffer buffer)
protected void	doClose(Buffer buffer, int id)
protected abstract void	doClose(int id, java.lang.String handle)
protected void	doCopyData(Buffer buffer, int id)
protected abstract void	doCopyData(int id, java.lang.String readHandle, long readOffset, long readLength, java.lang.String writeHandle, long writeOffset)
protected void	doCopyFile(Buffer buffer, int id)
protected void	doCopyFile(int id, java.lang.String srcFile, java.lang.String dstFile, boolean overwriteDestination)
protected void	doCopyFile(int id, java.lang.String srcFile, java.lang.String dstFile, java.util.Collection<java.nio.file.CopyOption> opts)
protected void	doExtended(Buffer buffer, int id)
protected void	doFSetStat(Buffer buffer, int id)
protected abstract void	doFSetStat(int id, java.lang.String handle, java.util.Map<java.lang.String,?> attrs)
protected void	doFStat(Buffer buffer, int id)
protected abstract java.util.Map<java.lang.String,java.lang.Object>	doFStat(int id, java.lang.String handle, int flags)
protected abstract void	doInit(Buffer buffer, int id)
protected void	doLink(Buffer buffer, int id)
protected void	doLink(int id, java.lang.String targetPath, java.lang.String linkPath, boolean symLink)
protected void	doLStat(Buffer buffer, int id)
protected java.util.Map<java.lang.String,java.lang.Object>	doLStat(int id, java.lang.String path, int flags)
protected void	doMakeDirectory(Buffer buffer, int id)
protected void	doMakeDirectory(int id, java.lang.String path, java.util.Map<java.lang.String,?> attrs, java.nio.file.LinkOption... options)
protected void	doMD5Hash(Buffer buffer, int id, java.lang.String targetType)
protected byte[]	doMD5Hash(int id, java.nio.file.Path path, long startOffset, long length, byte[] quickCheckHash)
protected abstract byte[]	doMD5Hash(int id, java.lang.String targetType, java.lang.String target, long startOffset, long length, byte[] quickCheckHash)
protected void	doOpen(Buffer buffer, int id)
protected abstract java.lang.String	doOpen(int id, java.lang.String path, int pflags, int access, java.util.Map<java.lang.String,java.lang.Object> attrs)
protected void	doOpenDir(Buffer buffer, int id)
protected abstract java.lang.String	doOpenDir(int id, java.lang.String path, java.nio.file.Path p, java.nio.file.LinkOption... options)
protected void	doOpenSSHFsync(Buffer buffer, int id)
protected abstract void	doOpenSSHFsync(int id, java.lang.String handle)
protected void	doOpenSSHHardLink(Buffer buffer, int id)
protected void	doOpenSSHHardLink(int id, java.lang.String srcFile, java.lang.String dstFile)
protected void	doProcess(Buffer buffer, int length, int type, int id)
protected void	doRead(Buffer buffer, int id)
protected abstract int	doRead(int id, java.lang.String handle, long offset, int length, byte[] data, int doff)
protected abstract void	doReadDir(Buffer buffer, int id)
protected int	doReadDir(int id, java.lang.String handle, DirectoryHandle dir, Buffer buffer, int maxSize, java.nio.file.LinkOption... options)
protected void	doReadLink(Buffer buffer, int id)
protected java.lang.String	doReadLink(int id, java.lang.String path)
protected void	doRealPath(Buffer buffer, int id)
protected java.util.AbstractMap.SimpleImmutableEntry<java.nio.file.Path,java.lang.Boolean>	doRealPathV345(int id, java.lang.String path, java.nio.file.Path p, java.nio.file.LinkOption... options)
protected java.util.AbstractMap.SimpleImmutableEntry<java.nio.file.Path,java.lang.Boolean>	doRealPathV6(int id, java.lang.String path, java.util.Collection<java.lang.String> extraPaths, java.nio.file.Path p, java.nio.file.LinkOption... options)
protected void	doRemove(Buffer buffer, int id)
protected void	doRemove(int id, java.nio.file.Path p, boolean isDirectory) Called when need to delete a file / directory - also informs the SftpEventListener
protected void	doRemove(int id, java.lang.String path, java.nio.file.LinkOption... options)
protected void	doRemoveDirectory(Buffer buffer, int id)
protected void	doRemoveDirectory(int id, java.lang.String path, java.nio.file.LinkOption... options)
protected void	doRename(Buffer buffer, int id)
protected void	doRename(int id, java.lang.String oldPath, java.lang.String newPath, java.util.Collection<java.nio.file.CopyOption> opts)
protected void	doRename(int id, java.lang.String oldPath, java.lang.String newPath, int flags)
protected void	doSetAttributes(java.nio.file.Path file, java.util.Map<java.lang.String,?> attributes, boolean followLinks)
protected void	doSetStat(Buffer buffer, int id, java.lang.String extension, int cmd, java.lang.Boolean followLinks)
protected void	doSetStat(int id, java.lang.String path, int cmd, java.lang.String extension, java.util.Map<java.lang.String,?> attrs, java.lang.Boolean followLinks)
protected void	doSpaceAvailable(Buffer buffer, int id)
protected SpaceAvailableExtensionInfo	doSpaceAvailable(int id, java.lang.String path)
protected void	doStat(Buffer buffer, int id)
protected java.util.Map<java.lang.String,java.lang.Object>	doStat(int id, java.lang.String path, int flags)
protected void	doSymLink(Buffer buffer, int id)
protected void	doSymLink(int id, java.lang.String targetPath, java.lang.String linkPath)
protected void	doTextSeek(Buffer buffer, int id)
protected abstract void	doTextSeek(int id, java.lang.String handle, long line)
protected void	doUnblock(Buffer buffer, int id)
protected abstract void	doUnblock(int id, java.lang.String handle, long offset, long length)
protected void	doUnsupported(Buffer buffer, int length, int type, int id)
protected void	doUnsupportedExtension(Buffer buffer, int id, java.lang.String extension)
protected void	doVersionSelect(Buffer buffer, int id)
protected abstract void	doVersionSelect(Buffer buffer, int id, java.lang.String proposed)
protected void	doWrite(Buffer buffer, int id)
protected abstract void	doWrite(int id, java.lang.String handle, long offset, int length, byte[] data, int doff, int remaining)
protected void	executeExtendedCommand(Buffer buffer, int id, java.lang.String extension)
protected java.util.NavigableMap<java.lang.String,java.lang.Object>	getAttributes(java.nio.file.Path file, int flags, java.nio.file.LinkOption... options)
protected java.util.NavigableMap<java.lang.String,java.lang.Object>	getAttributes(java.nio.file.Path file, java.nio.file.LinkOption... options)
SftpErrorStatusDataHandler	getErrorStatusDataHandler()
SftpFileSystemAccessor	getFileSystemAccessor()
protected java.lang.String	getLongName(java.nio.file.Path f, java.lang.String shortName, boolean sendAttrs, java.nio.file.LinkOption... options)
protected java.lang.String	getLongName(java.nio.file.Path f, java.lang.String shortName, java.nio.file.LinkOption... options)
protected java.lang.String	getLongName(java.nio.file.Path f, java.lang.String shortName, java.util.Map<java.lang.String,?> attributes)
protected java.nio.file.LinkOption[]	getPathResolutionLinkOption(int cmd, java.lang.String extension, java.nio.file.Path path)
SftpEventListener	getSftpEventListenerProxy()
protected java.lang.String	getShortName(java.nio.file.Path f)
protected java.util.Map<java.lang.String,OptionalFeature>	getSupportedClientExtensions(ServerSession session)
UnsupportedAttributePolicy	getUnsupportedAttributePolicy()
protected java.util.NavigableMap<java.lang.String,java.lang.Object>	handleReadFileAttributesException(java.nio.file.Path file, java.lang.String view, java.nio.file.LinkOption[] options, java.io.IOException e)
protected void	handleSetFileAttributeFailure(java.nio.file.Path file, java.lang.String view, java.lang.String attribute, java.lang.Object value, java.util.Collection<java.lang.String> unsupported, java.lang.Exception e)
protected java.util.NavigableMap<java.lang.String,java.lang.Object>	handleUnknownStatusFileAttributes(java.nio.file.Path file, int flags, java.nio.file.LinkOption... options)
protected void	handleUnsupportedAttributes(java.util.Collection<java.lang.String> attributes)
protected void	handleUserPrincipalLookupServiceException(java.lang.Class<? extends java.security.Principal> principalType, java.lang.String name, java.io.IOException e)
protected java.nio.file.Path	normalize(java.nio.file.Path f)
protected abstract Buffer	prepareReply(Buffer buffer)
protected void	process(Buffer buffer) Process an SFTP command.
protected java.util.Map<java.lang.String,java.lang.Object>	readAttrs(Buffer buffer)
protected java.util.NavigableMap<java.lang.String,java.lang.Object>	readFileAttributes(java.nio.file.Path file, java.lang.String view, java.nio.file.LinkOption... options)
boolean	removeSftpEventListener(SftpEventListener listener) Remove a listener instance
protected java.util.Collection<java.lang.Integer>	resolveAclSupportedCapabilities(ServerSession session)
protected java.nio.file.Path	resolveFile(java.lang.String remotePath)
protected java.util.NavigableMap<java.lang.String,java.lang.Object>	resolveFileAttributes(java.nio.file.Path file, int flags, java.nio.file.LinkOption... options)
protected java.util.NavigableMap<java.lang.String,java.lang.Object>	resolveMissingFileAttributes(java.nio.file.Path file, int flags, java.util.Map<java.lang.String,java.lang.Object> current, java.nio.file.LinkOption... options) Called by getAttributes(Path, int, LinkOption...) in order to complete any attributes that could not be retrieved via the supported file system views.
protected java.lang.Object	resolveMissingFileAttributeValue(java.nio.file.Path file, java.lang.String name, java.lang.Object value, FileInfoExtractor<?> x, java.nio.file.LinkOption... options)
protected java.lang.String	resolveNewlineValue(ServerSession session)
protected java.nio.file.Path	resolveNormalizedLocation(java.lang.String remotePath)
protected java.util.List<AbstractOpenSSHExtensionParser.OpenSSHExtension>	resolveOpenSSHExtensions(ServerSession session)
protected boolean	resolvePathResolutionFollowLinks(int cmd, java.lang.String extension, java.nio.file.Path path)
protected abstract void	send(Buffer buffer)
protected void	sendAttrs(Buffer buffer, int id, java.util.Map<java.lang.String,?> attributes)
protected void	sendHandle(Buffer buffer, int id, java.lang.String handle)
protected void	sendLink(Buffer buffer, int id, java.lang.String link)
protected void	sendPath(Buffer buffer, int id, java.nio.file.Path f, java.util.Map<java.lang.String,?> attrs)
protected void	sendStatus(Buffer buffer, int id, int substatus, java.lang.String msg)
protected void	sendStatus(Buffer buffer, int id, int substatus, java.lang.String msg, java.lang.String lang)
protected void	sendStatus(Buffer buffer, int id, java.lang.Throwable e, int cmd, java.lang.Object... args) Invoked when an exception was thrown due to the execution of some SFTP command
protected void	setFileAccessControl(java.nio.file.Path file, java.util.List<java.nio.file.attribute.AclEntry> acl, java.nio.file.LinkOption... options)
protected void	setFileAttribute(java.nio.file.Path file, java.lang.String view, java.lang.String attribute, java.lang.Object value, java.nio.file.LinkOption... options)
protected void	setFileAttributes(java.nio.file.Path file, java.util.Map<java.lang.String,?> attributes, java.nio.file.LinkOption... options)
protected void	setFileExtensions(java.nio.file.Path file, java.util.Map<java.lang.String,byte[]> extensions, java.nio.file.LinkOption... options)
protected void	setFileOwnership(java.nio.file.Path file, java.lang.String attribute, java.security.Principal value, java.nio.file.LinkOption... options)
protected void	setFilePermissions(java.nio.file.Path file, java.util.Set<java.nio.file.attribute.PosixFilePermission> perms, java.nio.file.LinkOption... options)
protected void	setFileRawViewAttribute(java.nio.file.Path file, java.lang.String view, java.lang.String attribute, java.lang.Object value, java.nio.file.LinkOption... options)
protected void	setFileTime(java.nio.file.Path file, java.lang.String view, java.lang.String attribute, java.nio.file.attribute.FileTime value, java.nio.file.LinkOption... options)
protected <E extends java.io.IOException> E	signalOpenFailure(int id, java.lang.String pathValue, java.nio.file.Path path, boolean isDir, E thrown)
protected <E extends java.io.IOException> E	signalRemovalPreConditionFailure(int id, java.lang.String pathValue, java.nio.file.Path path, E thrown, boolean isRemoveDirectory)
protected java.nio.file.attribute.GroupPrincipal	toGroup(java.nio.file.Path file, java.nio.file.attribute.GroupPrincipal name)
protected java.nio.file.attribute.UserPrincipal	toUser(java.nio.file.Path file, java.nio.file.attribute.UserPrincipal name)
protected <H extends Handle> H	validateHandle(java.lang.String handle, Handle h, java.lang.Class<H> type) Makes sure that the local handle is not null and of the specified type
protected java.lang.Boolean	validateProposedVersion(Buffer buffer, int id, java.lang.String proposal)
protected java.util.AbstractMap.SimpleImmutableEntry<java.nio.file.Path,java.lang.Boolean>	validateRealPath(int id, java.lang.String path, java.nio.file.Path f, java.nio.file.LinkOption... options)
protected void	writeAttrs(Buffer buffer, java.util.Map<java.lang.String,?> attributes)
protected void	writeDirEntry(int id, DirectoryHandle dir, java.util.Map<java.lang.String,java.nio.file.Path> entries, Buffer buffer, int index, java.nio.file.Path f, java.lang.String shortName, java.nio.file.LinkOption... options)

Methods inherited from class org.apache.sshd.common.util.logging.AbstractLoggingBean

getSimplifiedLogger

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.sshd.server.subsystem.sftp.SftpSubsystemEnvironment

getDefaultDirectory, getSession, getVersion

Methods inherited from interface org.apache.sshd.common.session.SessionHolder

getSessionContext

Methods inherited from interface org.apache.sshd.server.session.ServerSessionHolder

getServerSession

Field Detail

AUTO_FOLLOW_LINKS

public static final java.lang.String AUTO_FOLLOW_LINKS

Whether to automatically follow symbolic links when resolving paths

See Also:

DEFAULT_AUTO_FOLLOW_LINKS, Constant Field Values

DEFAULT_AUTO_FOLLOW_LINKS

public static final boolean DEFAULT_AUTO_FOLLOW_LINKS

Default value of "sftp-auto-follow-links"

See Also:

Constant Field Values

CLIENT_EXTENSIONS_PROP

public static final java.lang.String CLIENT_EXTENSIONS_PROP

Allows controlling reports of which client extensions are supported (and reported via "support" and "support2" server extensions) as a comma-separate list of names. Note: requires overriding the executeExtendedCommand(Buffer, int, String) command accordingly. If empty string is set then no server extensions are reported

See Also:

DEFAULT_SUPPORTED_CLIENT_EXTENSIONS, Constant Field Values

DEFAULT_SUPPORTED_CLIENT_EXTENSIONS

public static final java.util.NavigableMap<java.lang.String,OptionalFeature> DEFAULT_SUPPORTED_CLIENT_EXTENSIONS

The default reported supported client extensions (case insensitive)

OPENSSH_EXTENSIONS_PROP

public static final java.lang.String OPENSSH_EXTENSIONS_PROP

Comma-separated list of which OpenSSH extensions are reported and what version is reported for each - format: name=version. If empty value set, then no such extensions are reported. Otherwise, the DEFAULT_OPEN_SSH_EXTENSIONS are used

See Also:

Constant Field Values

DEFAULT_OPEN_SSH_EXTENSIONS

public static final java.util.List<AbstractOpenSSHExtensionParser.OpenSSHExtension> DEFAULT_OPEN_SSH_EXTENSIONS

DEFAULT_OPEN_SSH_EXTENSIONS_NAMES

public static final java.util.List<java.lang.String> DEFAULT_OPEN_SSH_EXTENSIONS_NAMES

ACL_SUPPORTED_MASK_PROP

public static final java.lang.String ACL_SUPPORTED_MASK_PROP

Comma separate list of SSH_ACL_CAP_xxx names - where name can be without the prefix. If not defined then DEFAULT_ACL_SUPPORTED_MASK is used

See Also:

Constant Field Values

DEFAULT_ACL_SUPPORTED_MASK

public static final java.util.Set<java.lang.Integer> DEFAULT_ACL_SUPPORTED_MASK

NEWLINE_VALUE

public static final java.lang.String NEWLINE_VALUE

Property that can be used to set the reported NL value. If not set, then IoUtils.EOL is used

See Also:

Constant Field Values

MAX_READDATA_PACKET_LENGTH_PROP

public static final java.lang.String MAX_READDATA_PACKET_LENGTH_PROP

Force the use of a max. packet length for doRead(Buffer, int) protection against malicious packets

See Also:

DEFAULT_MAX_READDATA_PACKET_LENGTH, Constant Field Values

DEFAULT_MAX_READDATA_PACKET_LENGTH

public static final int DEFAULT_MAX_READDATA_PACKET_LENGTH

See Also:

Constant Field Values

unsupportedAttributePolicy

private final UnsupportedAttributePolicy unsupportedAttributePolicy

sftpEventListeners

private final java.util.Collection<SftpEventListener> sftpEventListeners

sftpEventListenerProxy

private final SftpEventListener sftpEventListenerProxy

fileSystemAccessor

private final SftpFileSystemAccessor fileSystemAccessor

errorStatusDataHandler

private final SftpErrorStatusDataHandler errorStatusDataHandler

Constructor Detail

AbstractSftpSubsystemHelper

protected AbstractSftpSubsystemHelper(UnsupportedAttributePolicy policy,
                                      SftpFileSystemAccessor accessor,
                                      SftpErrorStatusDataHandler handler)

Method Detail

getUnsupportedAttributePolicy

public UnsupportedAttributePolicy getUnsupportedAttributePolicy()

Specified by:

getUnsupportedAttributePolicy in interface SftpSubsystemEnvironment

Returns:

The selected behavior in case some unsupported attributes are requested

getFileSystemAccessor

public SftpFileSystemAccessor getFileSystemAccessor()

Specified by:

getFileSystemAccessor in interface SftpSubsystemEnvironment

Returns:

The SftpFileSystemAccessor used to access effective server-side paths

getSftpEventListenerProxy

public SftpEventListener getSftpEventListenerProxy()

Specified by:

getSftpEventListenerProxy in interface SftpEventListenerManager

Returns:

An instance representing all the currently registered listeners. Any method invocation is replicated to the actually registered listeners

addSftpEventListener

public boolean addSftpEventListener(SftpEventListener listener)

Description copied from interface: SftpEventListenerManager

Register a listener instance

Specified by:

addSftpEventListener in interface SftpEventListenerManager

Parameters:

listener - The SftpEventListener instance to add - never null

Returns:

true if listener is a previously un-registered one

removeSftpEventListener

public boolean removeSftpEventListener(SftpEventListener listener)

Description copied from interface: SftpEventListenerManager

Remove a listener instance

Specified by:

removeSftpEventListener in interface SftpEventListenerManager

Parameters:

listener - The SftpEventListener instance to remove - never null

Returns:

true if listener is a (removed) registered one

getErrorStatusDataHandler

public SftpErrorStatusDataHandler getErrorStatusDataHandler()

validateProposedVersion

protected java.lang.Boolean validateProposedVersion(Buffer buffer,
                                                    int id,
                                                    java.lang.String proposal)
                                             throws java.io.IOException

Parameters:

buffer - The Buffer holding the request

id - The request id

proposal - The proposed value

Returns:

A Boolean indicating whether to accept/reject the proposal. If null then rejection response has been sent, otherwise and appropriate response is generated

Throws:

java.io.IOException - If failed send an independent rejection response

checkVersionCompatibility

protected java.util.Map.Entry<java.lang.Integer,java.lang.String> checkVersionCompatibility(Buffer buffer,
                                                                                            int id,
                                                                                            int proposed,
                                                                                            int failureOpcode)
                                                                                     throws java.io.IOException

Checks if a proposed version is within supported range. Note: if the user forced a specific value via the SftpSubsystemEnvironment.SFTP_VERSION property, then it is used to validate the proposed value

Parameters:

buffer - The Buffer containing the request

id - The SSH message ID to be used to send the failure message if required

proposed - The proposed version value

failureOpcode - The failure opcode to send if validation fails

Returns:

A "pair" whose key is the negotiated version and value a String of comma separated values representing all the supported versions. null if validation failed and an appropriate status message was sent

Throws:

java.io.IOException - If failed to send the failure status message

process

protected void process(Buffer buffer)
                throws java.io.IOException

Process an SFTP command. If the command throws an exception, the channel will be closed.

Parameters:

buffer - the buffer to process

Throws:

java.io.IOException - if anything wrong happens

doProcess

protected void doProcess(Buffer buffer,
                         int length,
                         int type,
                         int id)
                  throws java.io.IOException

Throws:

java.io.IOException

doUnsupported

protected void doUnsupported(Buffer buffer,
                             int length,
                             int type,
                             int id)
                      throws java.io.IOException

Throws:

java.io.IOException

doInit

protected abstract void doInit(Buffer buffer,
                               int id)
                        throws java.io.IOException

Throws:

java.io.IOException

doVersionSelect

protected void doVersionSelect(Buffer buffer,
                               int id)
                        throws java.io.IOException

Throws:

java.io.IOException

doVersionSelect

protected abstract void doVersionSelect(Buffer buffer,
                                        int id,
                                        java.lang.String proposed)
                                 throws java.io.IOException

Throws:

java.io.IOException

doOpen

protected void doOpen(Buffer buffer,
                      int id)
               throws java.io.IOException

Throws:

java.io.IOException

doOpen

protected abstract java.lang.String doOpen(int id,
                                           java.lang.String path,
                                           int pflags,
                                           int access,
                                           java.util.Map<java.lang.String,java.lang.Object> attrs)
                                    throws java.io.IOException

Parameters:

id - Request id

path - Path

pflags - Open mode flags - see SSH_FXF_XXX flags

access - Access mode flags - see ACE4_XXX flags

attrs - Requested attributes

Returns:

The assigned (opaque) handle

Throws:

java.io.IOException - if failed to execute

signalOpenFailure

protected <E extends java.io.IOException> E signalOpenFailure(int id,
                                                              java.lang.String pathValue,
                                                              java.nio.file.Path path,
                                                              boolean isDir,
                                                              E thrown)
                                                       throws java.io.IOException

Throws:

java.io.IOException

doClose

protected void doClose(Buffer buffer,
                       int id)
                throws java.io.IOException

Throws:

java.io.IOException

doClose

protected abstract void doClose(int id,
                                java.lang.String handle)
                         throws java.io.IOException

Throws:

java.io.IOException

doRead

protected void doRead(Buffer buffer,
                      int id)
               throws java.io.IOException

Throws:

java.io.IOException

doRead

protected abstract int doRead(int id,
                              java.lang.String handle,
                              long offset,
                              int length,
                              byte[] data,
                              int doff)
                       throws java.io.IOException

Throws:

java.io.IOException

doWrite

protected void doWrite(Buffer buffer,
                       int id)
                throws java.io.IOException

Throws:

java.io.IOException

doWrite

protected abstract void doWrite(int id,
                                java.lang.String handle,
                                long offset,
                                int length,
                                byte[] data,
                                int doff,
                                int remaining)
                         throws java.io.IOException

Throws:

java.io.IOException

doLStat

protected void doLStat(Buffer buffer,
                       int id)
                throws java.io.IOException

Throws:

java.io.IOException

doLStat

protected java.util.Map<java.lang.String,java.lang.Object> doLStat(int id,
                                                                   java.lang.String path,
                                                                   int flags)
                                                            throws java.io.IOException

Throws:

java.io.IOException

doSetStat

protected void doSetStat(Buffer buffer,
                         int id,
                         java.lang.String extension,
                         int cmd,
                         java.lang.Boolean followLinks)
                  throws java.io.IOException

Throws:

java.io.IOException

doSetStat

protected void doSetStat(int id,
                         java.lang.String path,
                         int cmd,
                         java.lang.String extension,
                         java.util.Map<java.lang.String,?> attrs,
                         java.lang.Boolean followLinks)
                  throws java.io.IOException

Throws:

java.io.IOException

doFStat

protected void doFStat(Buffer buffer,
                       int id)
                throws java.io.IOException

Throws:

java.io.IOException

doFStat

protected abstract java.util.Map<java.lang.String,java.lang.Object> doFStat(int id,
                                                                            java.lang.String handle,
                                                                            int flags)
                                                                     throws java.io.IOException

Throws:

java.io.IOException

doFSetStat

protected void doFSetStat(Buffer buffer,
                          int id)
                   throws java.io.IOException

Throws:

java.io.IOException

doFSetStat

protected abstract void doFSetStat(int id,
                                   java.lang.String handle,
                                   java.util.Map<java.lang.String,?> attrs)
                            throws java.io.IOException

Throws:

java.io.IOException

doOpenDir

protected void doOpenDir(Buffer buffer,
                         int id)
                  throws java.io.IOException

Throws:

java.io.IOException

doOpenDir

protected abstract java.lang.String doOpenDir(int id,
                                              java.lang.String path,
                                              java.nio.file.Path p,
                                              java.nio.file.LinkOption... options)
                                       throws java.io.IOException

Throws:

java.io.IOException

doReadDir

protected abstract void doReadDir(Buffer buffer,
                                  int id)
                           throws java.io.IOException

Throws:

java.io.IOException

doLink

protected void doLink(Buffer buffer,
                      int id)
               throws java.io.IOException

Throws:

java.io.IOException

doLink

protected void doLink(int id,
                      java.lang.String targetPath,
                      java.lang.String linkPath,
                      boolean symLink)
               throws java.io.IOException

Throws:

java.io.IOException

doSymLink

protected void doSymLink(Buffer buffer,
                         int id)
                  throws java.io.IOException

Throws:

java.io.IOException

doSymLink

protected void doSymLink(int id,
                         java.lang.String targetPath,
                         java.lang.String linkPath)
                  throws java.io.IOException

Throws:

java.io.IOException

createLink

protected abstract void createLink(int id,
                                   java.lang.String existingPath,
                                   java.lang.String linkPath,
                                   boolean symLink)
                            throws java.io.IOException

Throws:

java.io.IOException

doOpenSSHHardLink

protected void doOpenSSHHardLink(Buffer buffer,
                                 int id)
                          throws java.io.IOException

Throws:

java.io.IOException

doOpenSSHHardLink

protected void doOpenSSHHardLink(int id,
                                 java.lang.String srcFile,
                                 java.lang.String dstFile)
                          throws java.io.IOException

Throws:

java.io.IOException

doSpaceAvailable

protected void doSpaceAvailable(Buffer buffer,
                                int id)
                         throws java.io.IOException

Throws:

java.io.IOException

doSpaceAvailable

protected SpaceAvailableExtensionInfo doSpaceAvailable(int id,
                                                       java.lang.String path)
                                                throws java.io.IOException

Throws:

java.io.IOException

doTextSeek

protected void doTextSeek(Buffer buffer,
                          int id)
                   throws java.io.IOException

Throws:

java.io.IOException

doTextSeek

protected abstract void doTextSeek(int id,
                                   java.lang.String handle,
                                   long line)
                            throws java.io.IOException

Throws:

java.io.IOException

doOpenSSHFsync

protected void doOpenSSHFsync(Buffer buffer,
                              int id)
                       throws java.io.IOException

Throws:

java.io.IOException

doOpenSSHFsync

protected abstract void doOpenSSHFsync(int id,
                                       java.lang.String handle)
                                throws java.io.IOException

Throws:

java.io.IOException

doCheckFileHash

protected void doCheckFileHash(Buffer buffer,
                               int id,
                               java.lang.String targetType)
                        throws java.io.IOException

Throws:

java.io.IOException

doCheckFileHash

protected void doCheckFileHash(int id,
                               java.nio.file.Path file,
                               NamedFactory<? extends Digest> factory,
                               long startOffset,
                               long length,
                               int blockSize,
                               Buffer buffer)
                        throws java.lang.Exception

Throws:

java.lang.Exception

doMD5Hash

protected void doMD5Hash(Buffer buffer,
                         int id,
                         java.lang.String targetType)
                  throws java.io.IOException

Throws:

java.io.IOException

doMD5Hash

protected abstract byte[] doMD5Hash(int id,
                                    java.lang.String targetType,
                                    java.lang.String target,
                                    long startOffset,
                                    long length,
                                    byte[] quickCheckHash)
                             throws java.lang.Exception

Throws:

java.lang.Exception

doMD5Hash

protected byte[] doMD5Hash(int id,
                           java.nio.file.Path path,
                           long startOffset,
                           long length,
                           byte[] quickCheckHash)
                    throws java.lang.Exception

Throws:

java.lang.Exception

doCheckFileHash

protected abstract void doCheckFileHash(int id,
                                        java.lang.String targetType,
                                        java.lang.String target,
                                        java.util.Collection<java.lang.String> algos,
                                        long startOffset,
                                        long length,
                                        int blockSize,
                                        Buffer buffer)
                                 throws java.lang.Exception

Throws:

java.lang.Exception

doReadLink

protected void doReadLink(Buffer buffer,
                          int id)
                   throws java.io.IOException

Throws:

java.io.IOException

doReadLink

protected java.lang.String doReadLink(int id,
                                      java.lang.String path)
                               throws java.io.IOException

Throws:

java.io.IOException

doRename

protected void doRename(Buffer buffer,
                        int id)
                 throws java.io.IOException

Throws:

java.io.IOException

doRename

protected void doRename(int id,
                        java.lang.String oldPath,
                        java.lang.String newPath,
                        int flags)
                 throws java.io.IOException

Throws:

java.io.IOException

doRename

protected void doRename(int id,
                        java.lang.String oldPath,
                        java.lang.String newPath,
                        java.util.Collection<java.nio.file.CopyOption> opts)
                 throws java.io.IOException

Throws:

java.io.IOException

doCopyData

protected void doCopyData(Buffer buffer,
                          int id)
                   throws java.io.IOException

Throws:

java.io.IOException

doCopyData

protected abstract void doCopyData(int id,
                                   java.lang.String readHandle,
                                   long readOffset,
                                   long readLength,
                                   java.lang.String writeHandle,
                                   long writeOffset)
                            throws java.io.IOException

Throws:

java.io.IOException

doCopyFile

protected void doCopyFile(Buffer buffer,
                          int id)
                   throws java.io.IOException

Throws:

java.io.IOException

doCopyFile

protected void doCopyFile(int id,
                          java.lang.String srcFile,
                          java.lang.String dstFile,
                          boolean overwriteDestination)
                   throws java.io.IOException

Throws:

java.io.IOException

doCopyFile

protected void doCopyFile(int id,
                          java.lang.String srcFile,
                          java.lang.String dstFile,
                          java.util.Collection<java.nio.file.CopyOption> opts)
                   throws java.io.IOException

Throws:

java.io.IOException

doBlock

protected void doBlock(Buffer buffer,
                       int id)
                throws java.io.IOException

Throws:

java.io.IOException

doBlock

protected abstract void doBlock(int id,
                                java.lang.String handle,
                                long offset,
                                long length,
                                int mask)
                         throws java.io.IOException

Throws:

java.io.IOException

doUnblock

protected void doUnblock(Buffer buffer,
                         int id)
                  throws java.io.IOException

Throws:

java.io.IOException

doUnblock

protected abstract void doUnblock(int id,
                                  java.lang.String handle,
                                  long offset,
                                  long length)
                           throws java.io.IOException

Throws:

java.io.IOException

doStat

protected void doStat(Buffer buffer,
                      int id)
               throws java.io.IOException

Throws:

java.io.IOException

doStat

protected java.util.Map<java.lang.String,java.lang.Object> doStat(int id,
                                                                  java.lang.String path,
                                                                  int flags)
                                                           throws java.io.IOException

Throws:

java.io.IOException

doRealPath

protected void doRealPath(Buffer buffer,
                          int id)
                   throws java.io.IOException

Throws:

java.io.IOException

doRealPathV6

protected java.util.AbstractMap.SimpleImmutableEntry<java.nio.file.Path,java.lang.Boolean> doRealPathV6(int id,
                                                                                                        java.lang.String path,
                                                                                                        java.util.Collection<java.lang.String> extraPaths,
                                                                                                        java.nio.file.Path p,
                                                                                                        java.nio.file.LinkOption... options)
                                                                                                 throws java.io.IOException

Throws:

java.io.IOException

doRealPathV345

protected java.util.AbstractMap.SimpleImmutableEntry<java.nio.file.Path,java.lang.Boolean> doRealPathV345(int id,
                                                                                                          java.lang.String path,
                                                                                                          java.nio.file.Path p,
                                                                                                          java.nio.file.LinkOption... options)
                                                                                                   throws java.io.IOException

Throws:

java.io.IOException

validateRealPath

protected java.util.AbstractMap.SimpleImmutableEntry<java.nio.file.Path,java.lang.Boolean> validateRealPath(int id,
                                                                                                            java.lang.String path,
                                                                                                            java.nio.file.Path f,
                                                                                                            java.nio.file.LinkOption... options)
                                                                                                     throws java.io.IOException

Parameters:

id - The request identifier

path - The original path

f - The resolve Path

options - The LinkOptions to use to verify file existence and access

Returns:

A AbstractMap.SimpleImmutableEntry whose key is the absolute normalized Path and value is a Boolean indicating its status

Throws:

java.io.IOException - If failed to validate the file

See Also:

IoUtils.checkFileExists(Path, LinkOption...)

doRemoveDirectory

protected void doRemoveDirectory(Buffer buffer,
                                 int id)
                          throws java.io.IOException

Throws:

java.io.IOException

doRemoveDirectory

protected void doRemoveDirectory(int id,
                                 java.lang.String path,
                                 java.nio.file.LinkOption... options)
                          throws java.io.IOException

Throws:

java.io.IOException

doRemove

protected void doRemove(int id,
                        java.nio.file.Path p,
                        boolean isDirectory)
                 throws java.io.IOException

Called when need to delete a file / directory - also informs the SftpEventListener

Parameters:

id - Deletion request ID

p - Path to delete

isDirectory - Whether the requested path represents a directory or a regular file

Throws:

java.io.IOException - If failed to delete

doMakeDirectory

protected void doMakeDirectory(Buffer buffer,
                               int id)
                        throws java.io.IOException

Throws:

java.io.IOException

doMakeDirectory

protected void doMakeDirectory(int id,
                               java.lang.String path,
                               java.util.Map<java.lang.String,?> attrs,
                               java.nio.file.LinkOption... options)
                        throws java.io.IOException

Throws:

java.io.IOException

doRemove

protected void doRemove(Buffer buffer,
                        int id)
                 throws java.io.IOException

Throws:

java.io.IOException

doRemove

protected void doRemove(int id,
                        java.lang.String path,
                        java.nio.file.LinkOption... options)
                 throws java.io.IOException

Throws:

java.io.IOException

signalRemovalPreConditionFailure

protected <E extends java.io.IOException> E signalRemovalPreConditionFailure(int id,
                                                                             java.lang.String pathValue,
                                                                             java.nio.file.Path path,
                                                                             E thrown,
                                                                             boolean isRemoveDirectory)
                                                                      throws java.io.IOException

Throws:

java.io.IOException

doExtended

protected void doExtended(Buffer buffer,
                          int id)
                   throws java.io.IOException

Throws:

java.io.IOException

executeExtendedCommand

protected void executeExtendedCommand(Buffer buffer,
                                      int id,
                                      java.lang.String extension)
                               throws java.io.IOException

Parameters:

buffer - The command Buffer

id - The request id

extension - The extension name

Throws:

java.io.IOException - If failed to execute the extension

doUnsupportedExtension

protected void doUnsupportedExtension(Buffer buffer,
                                      int id,
                                      java.lang.String extension)
                               throws java.io.IOException

Throws:

java.io.IOException

appendExtensions

protected void appendExtensions(Buffer buffer,
                                java.lang.String supportedVersions)

appendAclSupportedExtension

protected int appendAclSupportedExtension(Buffer buffer,
                                          ServerSession session)

resolveAclSupportedCapabilities

protected java.util.Collection<java.lang.Integer> resolveAclSupportedCapabilities(ServerSession session)

appendOpenSSHExtensions

protected java.util.List<AbstractOpenSSHExtensionParser.OpenSSHExtension> appendOpenSSHExtensions(Buffer buffer,
                                                                                                  ServerSession session)

resolveOpenSSHExtensions

protected java.util.List<AbstractOpenSSHExtensionParser.OpenSSHExtension> resolveOpenSSHExtensions(ServerSession session)

getSupportedClientExtensions

protected java.util.Map<java.lang.String,OptionalFeature> getSupportedClientExtensions(ServerSession session)

appendVersionsExtension

protected void appendVersionsExtension(Buffer buffer,
                                       java.lang.String value,
                                       ServerSession session)

Appends the "versions" extension to the buffer. Note: if overriding this method make sure you either do not append anything or use the correct extension name

Parameters:

buffer - The Buffer to append to

value - The recommended value - ignored if null/empty

session - The ServerSession for which this extension is added

See Also:

SftpConstants.EXT_VERSIONS

appendNewlineExtension

protected void appendNewlineExtension(Buffer buffer,
                                      ServerSession session)

Appends the "newline" extension to the buffer. Note: if overriding this method make sure you either do not append anything or use the correct extension name

Parameters:

buffer - The Buffer to append to

session - The ServerSession for which this extension is added

See Also:

SftpConstants.EXT_NEWLINE, resolveNewlineValue(ServerSession)

resolveNewlineValue

protected java.lang.String resolveNewlineValue(ServerSession session)

appendVendorIdExtension

protected void appendVendorIdExtension(Buffer buffer,
                                       java.util.Map<java.lang.String,?> versionProperties,
                                       ServerSession session)

Appends the "vendor-id" extension to the buffer. Note: if overriding this method make sure you either do not append anything or use the correct extension name

Parameters:

buffer - The Buffer to append to

versionProperties - The currently available version properties - ignored if null/empty. The code expects the following values:

• groupId - as the vendor name
• artifactId - as the product name
• version - as the product version

session - The ServerSession for which these properties are added

See Also:

SftpConstants.EXT_VENDOR_ID, DRAFT 09 - section 4.4

appendSupportedExtension

protected void appendSupportedExtension(Buffer buffer,
                                        java.util.Collection<java.lang.String> extras)

Appends the "supported" extension to the buffer. Note: if overriding this method make sure you either do not append anything or use the correct extension name

Parameters:

buffer - The Buffer to append to

extras - The extra extensions that are available and can be reported - may be null/empty

appendSupported2Extension

protected void appendSupported2Extension(Buffer buffer,
                                         java.util.Collection<java.lang.String> extras)

Appends the "supported2" extension to the buffer. Note: if overriding this method make sure you either do not append anything or use the correct extension name

Parameters:

buffer - The Buffer to append to

extras - The extra extensions that are available and can be reported - may be null/empty

See Also:

SftpConstants.EXT_SUPPORTED, DRAFT 13 section 5.4

sendHandle

protected void sendHandle(Buffer buffer,
                          int id,
                          java.lang.String handle)
                   throws java.io.IOException

Throws:

java.io.IOException

sendAttrs

protected void sendAttrs(Buffer buffer,
                         int id,
                         java.util.Map<java.lang.String,?> attributes)
                  throws java.io.IOException

Throws:

java.io.IOException

sendLink

protected void sendLink(Buffer buffer,
                        int id,
                        java.lang.String link)
                 throws java.io.IOException

Throws:

java.io.IOException

sendPath

protected void sendPath(Buffer buffer,
                        int id,
                        java.nio.file.Path f,
                        java.util.Map<java.lang.String,?> attrs)
                 throws java.io.IOException

Throws:

java.io.IOException

doReadDir

protected int doReadDir(int id,
                        java.lang.String handle,
                        DirectoryHandle dir,
                        Buffer buffer,
                        int maxSize,
                        java.nio.file.LinkOption... options)
                 throws java.io.IOException

Parameters:

id - Request id

handle - The (opaque) handle assigned to this directory

dir - The DirectoryHandle

buffer - The Buffer to write the results

maxSize - Max. buffer size

options - The LinkOption-s to use when querying the directory contents

Returns:

Number of written entries

Throws:

java.io.IOException - If failed to generate an entry

writeDirEntry

protected void writeDirEntry(int id,
                             DirectoryHandle dir,
                             java.util.Map<java.lang.String,java.nio.file.Path> entries,
                             Buffer buffer,
                             int index,
                             java.nio.file.Path f,
                             java.lang.String shortName,
                             java.nio.file.LinkOption... options)
                      throws java.io.IOException

Parameters:

id - Request id

dir - The DirectoryHandle

entries - An in / out Map for updating the written entry - key = short name, value = entry Path

buffer - The Buffer to write the results

index - Zero-based index of the entry to be written

f - The entry Path

shortName - The entry short name

options - The LinkOptions to use for querying the entry-s attributes

Throws:

java.io.IOException - If failed to generate the entry data

getLongName

protected java.lang.String getLongName(java.nio.file.Path f,
                                       java.lang.String shortName,
                                       java.nio.file.LinkOption... options)
                                throws java.io.IOException

Throws:

java.io.IOException

getLongName

protected java.lang.String getLongName(java.nio.file.Path f,
                                       java.lang.String shortName,
                                       boolean sendAttrs,
                                       java.nio.file.LinkOption... options)
                                throws java.io.IOException

Throws:

java.io.IOException

getLongName

protected java.lang.String getLongName(java.nio.file.Path f,
                                       java.lang.String shortName,
                                       java.util.Map<java.lang.String,?> attributes)
                                throws java.io.IOException

Throws:

java.io.IOException

getShortName

protected java.lang.String getShortName(java.nio.file.Path f)
                                 throws java.io.IOException

Throws:

java.io.IOException

resolveFileAttributes

protected java.util.NavigableMap<java.lang.String,java.lang.Object> resolveFileAttributes(java.nio.file.Path file,
                                                                                          int flags,
                                                                                          java.nio.file.LinkOption... options)
                                                                                   throws java.io.IOException

Throws:

java.io.IOException

writeAttrs

protected void writeAttrs(Buffer buffer,
                          java.util.Map<java.lang.String,?> attributes)
                   throws java.io.IOException

Throws:

java.io.IOException

getAttributes

protected java.util.NavigableMap<java.lang.String,java.lang.Object> getAttributes(java.nio.file.Path file,
                                                                                  java.nio.file.LinkOption... options)
                                                                           throws java.io.IOException

Throws:

java.io.IOException

handleUnknownStatusFileAttributes

protected java.util.NavigableMap<java.lang.String,java.lang.Object> handleUnknownStatusFileAttributes(java.nio.file.Path file,
                                                                                                      int flags,
                                                                                                      java.nio.file.LinkOption... options)
                                                                                               throws java.io.IOException

Throws:

java.io.IOException

getAttributes

protected java.util.NavigableMap<java.lang.String,java.lang.Object> getAttributes(java.nio.file.Path file,
                                                                                  int flags,
                                                                                  java.nio.file.LinkOption... options)
                                                                           throws java.io.IOException

Parameters:

file - The Path location for the required attributes

flags - A mask of the original required attributes - ignored by the default implementation

options - The LinkOptions to use in order to access the file if necessary

Returns:

A Map of the retrieved attributes

Throws:

java.io.IOException - If failed to access the file

See Also:

resolveMissingFileAttributes(Path, int, Map, LinkOption...)

resolveMissingFileAttributes

protected java.util.NavigableMap<java.lang.String,java.lang.Object> resolveMissingFileAttributes(java.nio.file.Path file,
                                                                                                 int flags,
                                                                                                 java.util.Map<java.lang.String,java.lang.Object> current,
                                                                                                 java.nio.file.LinkOption... options)
                                                                                          throws java.io.IOException

Called by getAttributes(Path, int, LinkOption...) in order to complete any attributes that could not be retrieved via the supported file system views. These attributes are deemed important so an extra effort is made to provide a value for them

Parameters:

file - The Path location for the required attributes

flags - A mask of the original required attributes - ignored by the default implementation

current - The Map of attributes already retrieved - may be null/empty and/or unmodifiable

options - The LinkOptions to use in order to access the file if necessary

Returns:

A Map of the extra attributes whose values need to be updated in the original map. Note: it is allowed to specify values which override existing ones - the default implementation does not override values that have a non-null value

Throws:

java.io.IOException - If failed to access the attributes - in which case an error is returned to the SFTP client

See Also:

SftpFileSystemAccessor.FILEATTRS_RESOLVERS

resolveMissingFileAttributeValue

protected java.lang.Object resolveMissingFileAttributeValue(java.nio.file.Path file,
                                                            java.lang.String name,
                                                            java.lang.Object value,
                                                            FileInfoExtractor<?> x,
                                                            java.nio.file.LinkOption... options)
                                                     throws java.io.IOException

Throws:

java.io.IOException

addMissingAttribute

protected java.util.NavigableMap<java.lang.String,java.lang.Object> addMissingAttribute(java.nio.file.Path file,
                                                                                        java.util.NavigableMap<java.lang.String,java.lang.Object> current,
                                                                                        java.lang.String name,
                                                                                        FileInfoExtractor<?> x,
                                                                                        java.nio.file.LinkOption... options)
                                                                                 throws java.io.IOException

Throws:

java.io.IOException

readFileAttributes

protected java.util.NavigableMap<java.lang.String,java.lang.Object> readFileAttributes(java.nio.file.Path file,
                                                                                       java.lang.String view,
                                                                                       java.nio.file.LinkOption... options)
                                                                                throws java.io.IOException

Throws:

java.io.IOException

handleReadFileAttributesException

protected java.util.NavigableMap<java.lang.String,java.lang.Object> handleReadFileAttributesException(java.nio.file.Path file,
                                                                                                      java.lang.String view,
                                                                                                      java.nio.file.LinkOption[] options,
                                                                                                      java.io.IOException e)
                                                                                               throws java.io.IOException

Throws:

java.io.IOException

doSetAttributes

protected void doSetAttributes(java.nio.file.Path file,
                               java.util.Map<java.lang.String,?> attributes,
                               boolean followLinks)
                        throws java.io.IOException

Throws:

java.io.IOException

getPathResolutionLinkOption

protected java.nio.file.LinkOption[] getPathResolutionLinkOption(int cmd,
                                                                 java.lang.String extension,
                                                                 java.nio.file.Path path)
                                                          throws java.io.IOException

Throws:

java.io.IOException

resolvePathResolutionFollowLinks

protected boolean resolvePathResolutionFollowLinks(int cmd,
                                                   java.lang.String extension,
                                                   java.nio.file.Path path)
                                            throws java.io.IOException

Throws:

java.io.IOException

setFileAttributes

protected void setFileAttributes(java.nio.file.Path file,
                                 java.util.Map<java.lang.String,?> attributes,
                                 java.nio.file.LinkOption... options)
                          throws java.io.IOException

Throws:

java.io.IOException

handleSetFileAttributeFailure

protected void handleSetFileAttributeFailure(java.nio.file.Path file,
                                             java.lang.String view,
                                             java.lang.String attribute,
                                             java.lang.Object value,
                                             java.util.Collection<java.lang.String> unsupported,
                                             java.lang.Exception e)
                                      throws java.io.IOException

Throws:

java.io.IOException

setFileAttribute

protected void setFileAttribute(java.nio.file.Path file,
                                java.lang.String view,
                                java.lang.String attribute,
                                java.lang.Object value,
                                java.nio.file.LinkOption... options)
                         throws java.io.IOException

Throws:

java.io.IOException

setFileTime

protected void setFileTime(java.nio.file.Path file,
                           java.lang.String view,
                           java.lang.String attribute,
                           java.nio.file.attribute.FileTime value,
                           java.nio.file.LinkOption... options)
                    throws java.io.IOException

Throws:

java.io.IOException

setFileRawViewAttribute

protected void setFileRawViewAttribute(java.nio.file.Path file,
                                       java.lang.String view,
                                       java.lang.String attribute,
                                       java.lang.Object value,
                                       java.nio.file.LinkOption... options)
                                throws java.io.IOException

Throws:

java.io.IOException

setFileOwnership

protected void setFileOwnership(java.nio.file.Path file,
                                java.lang.String attribute,
                                java.security.Principal value,
                                java.nio.file.LinkOption... options)
                         throws java.io.IOException

Throws:

java.io.IOException

setFileExtensions

protected void setFileExtensions(java.nio.file.Path file,
                                 java.util.Map<java.lang.String,byte[]> extensions,
                                 java.nio.file.LinkOption... options)
                          throws java.io.IOException

Throws:

java.io.IOException

setFilePermissions

protected void setFilePermissions(java.nio.file.Path file,
                                  java.util.Set<java.nio.file.attribute.PosixFilePermission> perms,
                                  java.nio.file.LinkOption... options)
                           throws java.io.IOException

Throws:

java.io.IOException

setFileAccessControl

protected void setFileAccessControl(java.nio.file.Path file,
                                    java.util.List<java.nio.file.attribute.AclEntry> acl,
                                    java.nio.file.LinkOption... options)
                             throws java.io.IOException

Throws:

java.io.IOException

handleUnsupportedAttributes

protected void handleUnsupportedAttributes(java.util.Collection<java.lang.String> attributes)

toGroup

protected java.nio.file.attribute.GroupPrincipal toGroup(java.nio.file.Path file,
                                                         java.nio.file.attribute.GroupPrincipal name)
                                                  throws java.io.IOException

Throws:

java.io.IOException

toUser

protected java.nio.file.attribute.UserPrincipal toUser(java.nio.file.Path file,
                                                       java.nio.file.attribute.UserPrincipal name)
                                                throws java.io.IOException

Throws:

java.io.IOException

handleUserPrincipalLookupServiceException

protected void handleUserPrincipalLookupServiceException(java.lang.Class<? extends java.security.Principal> principalType,
                                                         java.lang.String name,
                                                         java.io.IOException e)
                                                  throws java.io.IOException

Throws:

java.io.IOException

readAttrs

protected java.util.Map<java.lang.String,java.lang.Object> readAttrs(Buffer buffer)
                                                              throws java.io.IOException

Throws:

java.io.IOException

validateHandle

protected <H extends Handle> H validateHandle(java.lang.String handle,
                                              Handle h,
                                              java.lang.Class<H> type)
                                       throws java.io.IOException

Makes sure that the local handle is not null and of the specified type

Type Parameters:

H - The generic handle type

Parameters:

handle - The original handle id

h - The resolved Handle instance

type - The expected handle type

Returns:

The cast type

Throws:

java.io.IOException - If a generic exception occurred

java.io.FileNotFoundException - If the handle instance is null

InvalidHandleException - If the handle instance is not of the expected type

sendStatus

protected void sendStatus(Buffer buffer,
                          int id,
                          java.lang.Throwable e,
                          int cmd,
                          java.lang.Object... args)
                   throws java.io.IOException

Invoked when an exception was thrown due to the execution of some SFTP command

Parameters:

buffer - A Buffer to be used to build the status reply

id - Command identifier

e - Thrown exception

cmd - The command that was attempted

args - The relevant command arguments - Note: provided only for logging purposes and subject to type and/or order change at any version

Throws:

java.io.IOException - If failed to build and send the status buffer

sendStatus

protected void sendStatus(Buffer buffer,
                          int id,
                          int substatus,
                          java.lang.String msg)
                   throws java.io.IOException

Throws:

java.io.IOException

sendStatus

protected void sendStatus(Buffer buffer,
                          int id,
                          int substatus,
                          java.lang.String msg,
                          java.lang.String lang)
                   throws java.io.IOException

Throws:

java.io.IOException

prepareReply

protected abstract Buffer prepareReply(Buffer buffer)

send

protected abstract void send(Buffer buffer)
                      throws java.io.IOException

Throws:

java.io.IOException

resolveNormalizedLocation

protected java.nio.file.Path resolveNormalizedLocation(java.lang.String remotePath)
                                                throws java.io.IOException,
                                                       java.nio.file.InvalidPathException

Throws:

java.io.IOException

java.nio.file.InvalidPathException

normalize

protected java.nio.file.Path normalize(java.nio.file.Path f)

resolveFile

protected java.nio.file.Path resolveFile(java.lang.String remotePath)
                                  throws java.io.IOException,
                                         java.nio.file.InvalidPathException

Parameters:

remotePath - The remote path - separated by '/'

Returns:

The local Path

Throws:

java.io.IOException - If failed to resolve the local path

java.nio.file.InvalidPathException - If bad local path specification