Scp Lianja Reference Documentation

Scp

An API for SCP over SSH. (SCP is the Secure Copy Protocol.) It is for transferring files or directory trees to or from remote servers. SCP is a simpler protocol than SFTP, and thus the functionality is more limited. However, SCP does not require that an SSH server support the SFTP subsystem. In cases where a server does not allow for SFTP, then SCP is a good choice for file transfer.

Object Creation

loObject = createobject("CkScp")

Properties

AbortCurrent As Boolean

Introduced in version 9.5.0.58

When set to .T., causes the currently running method to abort. Methods that always finish quickly (i.e.have no length file operations or network communications) are not affected. If no method is running, then this property is automatically reset to .F. when the next method is called. When the abort occurs, this property is reset to .F.. Both synchronous and asynchronous method calls can be aborted. (A synchronous method call could be aborted by setting this property from a separate thread.)

DebugLogFilePath As Character

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

LastErrorHtml As Character (read-only)

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

LastErrorText As Character (read-only)

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

Concept of LastErrorText

LastErrorText Standard Information

LastErrorXml As Character (read-only)

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

LastMethodSuccess As Boolean

Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of .T. indicates success, a value of .F. indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = .T. and failure = .F..
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to .T.. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

SyncedFiles As Character

Introduced in version 9.5.0.51

The paths of the files uploaded or downloaded in the last call to SyncUploadTree or SyncDownloadTree. The paths are listed one per line. In both cases (for upload and download) each line contains the full local file path (not the remote path).

SCP Sync Tree Download

SCP Sync Tree Upload

SyncMustMatch As Character

Introduced in version 9.5.0.51

Can contain a wildcarded list of filename patterns separated by semicolons. For example, "*.xml; *.txt; *.csv". If set, the SyncTreeUpload and SyncTreeDownload methods will only transfer files having a filename that matches any one of these patterns.

SCP Sync Tree Download

SCP Sync Tree Upload

SCP Download Files Matching a Pattern, such as *.txt

SyncMustMatchDir As Character

Introduced in version 9.5.0.58

Can contain a wildcarded list of directory name patterns separated by semicolons. For example, "a*; b*; c*". If set, the SyncTreeUpload and SyncTreeDownload methods will only traverse into a directory that matches any one of these patterns.

SyncMustNotMatch As Character

Introduced in version 9.5.0.51

Can contain a wildcarded list of filename patterns separated by semicolons. For example, "*.xml; *.txt; *.csv". If set, the SyncTreeUpload and SyncTreeDownload methods will not transfer files having a filename that matches any one of these patterns.

SCP Sync Tree Download

SCP Sync Tree Upload

SyncMustNotMatchDir As Character

Introduced in version 9.5.0.58

Can contain a wildcarded list of directory name patterns separated by semicolons. For example, "a*; b*; c*". If set, the SyncTreeUpload and SyncTreeDownload methods will not traverse into a directory that matches any one of these patterns.

VerboseLogging As Boolean

If set to .T., then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is .F.. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

Version As Character (read-only)

Version of the component/library, such as "9.4.1.42"

Methods

DownloadBinaryEncoded(remotePath As Character, encoding As Character) As Character

Introduced in version 9.5.0.51

Downloads a file from the SSH server returns the contents in an encoded string (using an encoding such as base64).

Returns .F. on failure

List of Supported Encodings (Base64, Hex, etc.)

SCP Download/Upload Binary Files as Encoded Strings

DownloadBinaryEncodedAsync(remotePath As Character, encoding As Character) As CkTask

Introduced in version 9.5.0.51

Creates an asynchronous task to call the DownloadBinaryEncoded method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns .F. on failure

How to Run an Asynchronous Task

DownloadFile(remotePath As Character, localPath As Character) As Boolean

Introduced in version 9.5.0.51

Downloads a file from the remote SSH server to the local filesystem.

Returns .T. for success, .F. for failure.

SCP Download File

SCP Download from a Specific Directory

DownloadFileAsync(remotePath As Character, localPath As Character) As CkTask

Introduced in version 9.5.0.51

Creates an asynchronous task to call the DownloadFile method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns .F. on failure

How to Run an Asynchronous Task

DownloadString(remotePath As Character, charset As Character) As Character

Introduced in version 9.5.0.51

Downloads a text file from the SSH server and returns the contents as a string.

Returns .F. on failure

SCP Download Text File to String Variable

DownloadStringAsync(remotePath As Character, charset As Character) As CkTask

Introduced in version 9.5.0.51

Creates an asynchronous task to call the DownloadString method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns .F. on failure

How to Run an Asynchronous Task

SaveLastError(path As Character) As Boolean

Saves the last-error information (the contents of LastErrorXml) to an XML formatted file.

Returns .T. for success, .F. for failure.

SyncTreeDownload(remoteRoot As Character, localRoot As Character, mode As Numeric, bRecurse As Boolean) As Boolean

Introduced in version 9.5.0.51

Downloads files from the SSH server to a local directory tree. Synchronization modes include:

mode=0: Download all files
mode=1: Download all files that do not exist on the local filesystem.
mode=2: Download newer or non-existant files.
mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server.
mode=5: Download only missing files or files with size differences.
mode=6: Same as mode 5, but also download newer files.

Returns .T. for success, .F. for failure.

SCP Sync Tree Download

SyncTreeDownloadAsync(remoteRoot As Character, localRoot As Character, mode As Numeric, bRecurse As Boolean) As CkTask

Introduced in version 9.5.0.51

Creates an asynchronous task to call the SyncTreeDownload method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns .F. on failure

How to Run an Asynchronous Task

SyncTreeUpload(localBaseDir As Character, remoteBaseDir As Character, mode As Numeric, bRecurse As Boolean) As Boolean

Introduced in version 9.5.0.51

Uploads a directory tree from the local filesystem to the SSH server. Synchronization modes include:

mode=0: Upload all files
mode=1: Upload all files that do not exist on the FTP server.
mode=2: Upload newer or non-existant files.
mode=3: Upload only newer files. If a file does not already exist on the FTP server, it is not uploaded.
mode=4: transfer missing files or files with size differences.
mode=5: same as mode 4, but also newer files.

Returns .T. for success, .F. for failure.

SyncTreeUploadAsync(localBaseDir As Character, remoteBaseDir As Character, mode As Numeric, bRecurse As Boolean) As CkTask

Introduced in version 9.5.0.51

Creates an asynchronous task to call the SyncTreeUpload method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns .F. on failure

How to Run an Asynchronous Task

UploadBinaryEncoded(remotePath As Character, encodedData As Character, encoding As Character) As Boolean

Introduced in version 9.5.0.51

Uploads the binary data to a file on the remote SSH server. The binary data is passed in encoded string representation (such as base64, or hex).

Returns .T. for success, .F. for failure.

List of Supported Encodings (Base64, Hex, etc.)

SCP Download/Upload Binary Files as Encoded Strings

UploadBinaryEncodedAsync(remotePath As Character, encodedData As Character, encoding As Character) As CkTask

Introduced in version 9.5.0.51

Creates an asynchronous task to call the UploadBinaryEncoded method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns .F. on failure

How to Run an Asynchronous Task

UploadFile(localPath As Character, remotePath As Character) As Boolean

Introduced in version 9.5.0.51

Uploads a file from the local filesystem to the remote SSH server.

Returns .T. for success, .F. for failure.

SCP Upload File

SCP Upload to a Specific Remote Directory

UploadFileAsync(localPath As Character, remotePath As Character) As CkTask

Introduced in version 9.5.0.51

Creates an asynchronous task to call the UploadFile method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns .F. on failure

How to Run an Asynchronous Task

UploadString(remotePath As Character, textData As Character, charset As Character) As Boolean

Introduced in version 9.5.0.51

Uploads the contents of a string to a file on the remote SSH server.

Returns .T. for success, .F. for failure.

SCP Upload Contents of String to Remote File

UploadStringAsync(remotePath As Character, textData As Character, charset As Character) As CkTask

Introduced in version 9.5.0.51

Creates an asynchronous task to call the UploadString method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns .F. on failure

How to Run an Asynchronous Task

UseSsh(sshConnection As CkSsh) As Boolean

Introduced in version 9.5.0.51

Uses the SSH connection of sshConnection for the SCP transfers. All of the connection and socket related properties, proxy properites, timeout properties, session log, etc. set on the SSH object apply to the SCP methods (because internally it is the SSH object that is used to do the work of the file transfers).

Note: There is no UnlockComponent method in the SCP class because it is the SSH object that must be unlocked. When the SSH object is not unlocked, this method will return .F. to indicate failure.

Returns .T. for success, .F. for failure.