Scp Delphi DLL Reference Documentation

Scp

Current Version: 9.5.0.73

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.

Create/Dispose

var
myObject: HCkScp;

begin
myObject := CkScp_Create();

// ...

CkScp_Dispose(myObject);
end;
function CkScp_Create: HCkScp; stdcall;

Creates an instance of the HCkScp object and returns a handle (i.e. a Pointer). The handle is passed in the 1st argument for the functions listed on this page.

procedure CkScp_Dispose(handle: HCkScp); stdcall;

Objects created by calling CkScp_Create must be freed by calling this method. A memory leak occurs if a handle is not disposed by calling this function.

Properties

AbortCurrent
function CkScp_getAbortCurrent(objHandle: HCkScp): wordbool; stdcall;
procedure CkScp_putAbortCurrent(objHandle: HCkScp; newPropVal: wordbool); stdcall;
Introduced in version 9.5.0.58

When set to True, 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 False when the next method is called. When the abort occurs, this property is reset to False. Both synchronous and asynchronous method calls can be aborted. (A synchronous method call could be aborted by setting this property from a separate thread.)

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DebugLogFilePath
procedure CkScp_getDebugLogFilePath(objHandle: HCkScp; outPropVal: HCkString); stdcall;
procedure CkScp_putDebugLogFilePath(objHandle: HCkScp; newPropVal: PWideChar); stdcall;
function CkScp__debugLogFilePath(objHandle: HCkScp): PWideChar; stdcall;

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.

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LastErrorHtml
procedure CkScp_getLastErrorHtml(objHandle: HCkScp; outPropVal: HCkString); stdcall;
function CkScp__lastErrorHtml(objHandle: HCkScp): PWideChar; stdcall;

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.

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LastErrorText
procedure CkScp_getLastErrorText(objHandle: HCkScp; outPropVal: HCkString); stdcall;
function CkScp__lastErrorText(objHandle: HCkScp): PWideChar; stdcall;

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.

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LastErrorXml
procedure CkScp_getLastErrorXml(objHandle: HCkScp; outPropVal: HCkString); stdcall;
function CkScp__lastErrorXml(objHandle: HCkScp): PWideChar; stdcall;

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.

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LastMethodSuccess
function CkScp_getLastMethodSuccess(objHandle: HCkScp): wordbool; stdcall;
procedure CkScp_putLastMethodSuccess(objHandle: HCkScp; newPropVal: wordbool); stdcall;
Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of True indicates success, a value of False 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 = True and failure = False.
  • 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 True. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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SyncedFiles
procedure CkScp_getSyncedFiles(objHandle: HCkScp; outPropVal: HCkString); stdcall;
procedure CkScp_putSyncedFiles(objHandle: HCkScp; newPropVal: PWideChar); stdcall;
function CkScp__syncedFiles(objHandle: HCkScp): PWideChar; stdcall;
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).

More Information and Examples
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SyncMustMatch
procedure CkScp_getSyncMustMatch(objHandle: HCkScp; outPropVal: HCkString); stdcall;
procedure CkScp_putSyncMustMatch(objHandle: HCkScp; newPropVal: PWideChar); stdcall;
function CkScp__syncMustMatch(objHandle: HCkScp): PWideChar; stdcall;
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.

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SyncMustMatchDir
procedure CkScp_getSyncMustMatchDir(objHandle: HCkScp; outPropVal: HCkString); stdcall;
procedure CkScp_putSyncMustMatchDir(objHandle: HCkScp; newPropVal: PWideChar); stdcall;
function CkScp__syncMustMatchDir(objHandle: HCkScp): PWideChar; stdcall;
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.

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SyncMustNotMatch
procedure CkScp_getSyncMustNotMatch(objHandle: HCkScp; outPropVal: HCkString); stdcall;
procedure CkScp_putSyncMustNotMatch(objHandle: HCkScp; newPropVal: PWideChar); stdcall;
function CkScp__syncMustNotMatch(objHandle: HCkScp): PWideChar; stdcall;
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.

More Information and Examples
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SyncMustNotMatchDir
procedure CkScp_getSyncMustNotMatchDir(objHandle: HCkScp; outPropVal: HCkString); stdcall;
procedure CkScp_putSyncMustNotMatchDir(objHandle: HCkScp; newPropVal: PWideChar); stdcall;
function CkScp__syncMustNotMatchDir(objHandle: HCkScp): PWideChar; stdcall;
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.

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VerboseLogging
function CkScp_getVerboseLogging(objHandle: HCkScp): wordbool; stdcall;
procedure CkScp_putVerboseLogging(objHandle: HCkScp; newPropVal: wordbool); stdcall;

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

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Version
procedure CkScp_getVersion(objHandle: HCkScp; outPropVal: HCkString); stdcall;
function CkScp__version(objHandle: HCkScp): PWideChar; stdcall;

Version of the component/library, such as "9.5.0.63"

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Methods

DownloadBinary
function CkScp_DownloadBinary(objHandle: HCkScp;
    remotePath: PWideChar;
    outBytes: HCkByteData): wordbool; stdcall;
Introduced in version 9.5.0.51

Downloads a binary file from the SSH server and returns the contents.

Returns True for success, False for failure.

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DownloadBinaryAsync (1)
function CkScp_DownloadBinaryAsync(objHandle: HCkScp;
    remotePath: PWideChar): HCkTask; stdcall;
Introduced in version 9.5.0.51

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

Returns nil on failure

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DownloadBinaryEncoded
function CkScp_DownloadBinaryEncoded(objHandle: HCkScp;
    remotePath: PWideChar;
    encoding: PWideChar;
    outStr: HCkString): wordbool; stdcall;
function CkScp__downloadBinaryEncoded(objHandle: HCkScp;
    remotePath: PWideChar;
    encoding: PWideChar): PWideChar; stdcall;
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 True for success, False for failure.

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DownloadBinaryEncodedAsync (1)
function CkScp_DownloadBinaryEncodedAsync(objHandle: HCkScp;
    remotePath: PWideChar;
    encoding: PWideChar): HCkTask; stdcall;
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 nil on failure

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DownloadFile
function CkScp_DownloadFile(objHandle: HCkScp;
    remotePath: PWideChar;
    localPath: PWideChar): wordbool; stdcall;
Introduced in version 9.5.0.51

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

Returns True for success, False for failure.

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DownloadFileAsync (1)
function CkScp_DownloadFileAsync(objHandle: HCkScp;
    remotePath: PWideChar;
    localPath: PWideChar): HCkTask; stdcall;
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 nil on failure

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DownloadString
function CkScp_DownloadString(objHandle: HCkScp;
    remotePath: PWideChar;
    charset: PWideChar;
    outStr: HCkString): wordbool; stdcall;
function CkScp__downloadString(objHandle: HCkScp;
    remotePath: PWideChar;
    charset: PWideChar): PWideChar; stdcall;
Introduced in version 9.5.0.51

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

Returns True for success, False for failure.

More Information and Examples
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DownloadStringAsync (1)
function CkScp_DownloadStringAsync(objHandle: HCkScp;
    remotePath: PWideChar;
    charset: PWideChar): HCkTask; stdcall;
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 nil on failure

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SaveLastError
function CkScp_SaveLastError(objHandle: HCkScp;
    path: PWideChar): wordbool; stdcall;

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

Returns True for success, False for failure.

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SyncTreeDownload
function CkScp_SyncTreeDownload(objHandle: HCkScp;
    remoteRoot: PWideChar;
    localRoot: PWideChar;
    mode: Integer;
    bRecurse: wordbool): wordbool; stdcall;
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 True for success, False for failure.

More Information and Examples
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SyncTreeDownloadAsync (1)
function CkScp_SyncTreeDownloadAsync(objHandle: HCkScp;
    remoteRoot: PWideChar;
    localRoot: PWideChar;
    mode: Integer;
    bRecurse: wordbool): HCkTask; stdcall;
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 nil on failure

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SyncTreeUpload
function CkScp_SyncTreeUpload(objHandle: HCkScp;
    localBaseDir: PWideChar;
    remoteBaseDir: PWideChar;
    mode: Integer;
    bRecurse: wordbool): wordbool; stdcall;
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 True for success, False for failure.

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SyncTreeUploadAsync (1)
function CkScp_SyncTreeUploadAsync(objHandle: HCkScp;
    localBaseDir: PWideChar;
    remoteBaseDir: PWideChar;
    mode: Integer;
    bRecurse: wordbool): HCkTask; stdcall;
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 nil on failure

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UploadBinary
function CkScp_UploadBinary(objHandle: HCkScp;
    remotePath: PWideChar;
    binData: HCkByteData): wordbool; stdcall;
Introduced in version 9.5.0.51

Uploads binary data to a file on the SSH server.

Returns True for success, False for failure.

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UploadBinaryAsync (1)
function CkScp_UploadBinaryAsync(objHandle: HCkScp;
    remotePath: PWideChar;
    binData: HCkByteData): HCkTask; stdcall;
Introduced in version 9.5.0.51

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

Returns nil on failure

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UploadBinaryEncoded
function CkScp_UploadBinaryEncoded(objHandle: HCkScp;
    remotePath: PWideChar;
    encodedData: PWideChar;
    encoding: PWideChar): wordbool; stdcall;
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 True for success, False for failure.

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UploadBinaryEncodedAsync (1)
function CkScp_UploadBinaryEncodedAsync(objHandle: HCkScp;
    remotePath: PWideChar;
    encodedData: PWideChar;
    encoding: PWideChar): HCkTask; stdcall;
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 nil on failure

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UploadFile
function CkScp_UploadFile(objHandle: HCkScp;
    localPath: PWideChar;
    remotePath: PWideChar): wordbool; stdcall;
Introduced in version 9.5.0.51

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

Returns True for success, False for failure.

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UploadFileAsync (1)
function CkScp_UploadFileAsync(objHandle: HCkScp;
    localPath: PWideChar;
    remotePath: PWideChar): HCkTask; stdcall;
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 nil on failure

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UploadString
function CkScp_UploadString(objHandle: HCkScp;
    remotePath: PWideChar;
    textData: PWideChar;
    charset: PWideChar): wordbool; stdcall;
Introduced in version 9.5.0.51

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

Returns True for success, False for failure.

More Information and Examples
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UploadStringAsync (1)
function CkScp_UploadStringAsync(objHandle: HCkScp;
    remotePath: PWideChar;
    textData: PWideChar;
    charset: PWideChar): HCkTask; stdcall;
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 nil on failure

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UseSsh
function CkScp_UseSsh(objHandle: HCkScp;
    sshConnection: HCkSsh): wordbool; stdcall;
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 False to indicate failure.

Returns True for success, False for failure.

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