Exceptions

The FTP microservice defines several custom exceptions. These exceptions provide microservice-specific details.

FtpException

Base class for all FTP-related exceptions.

Base class for all FTP NAK exceptions.

Property	Type	Description
`Session`	`FtpOpcode`	Gets the FTP opcode (action) that caused the NAK response.
`NackError`	`NackError`	Gets the NAK error code reported by the FTP server.
`FsErrorCode`	`byte?`	Gets the file-system-specific error code when NackError is FailErrno otherwise, null.

Constructor	Description
`FtpNackException(FtpOpcode action, NackError nackError)`	Initializes a new instance of the FtpNackException class with a protocol-level NAK error code.
`FtpNackException(FtpOpcode action, byte fsErrorCode)`	Initializes a new instance of the FtpNackException class for FailErrno and captures the server-provided file-system error code.

Parameter	Type	Description
`action`	`FtpOpcode`	The FTP opcode (action) that failed.
`nackError`	`NackError`	The NAK error code returned by the server.

Parameter	Type	Description
`action`	`FtpOpcode`	The FTP opcode (action) that failed.
`fsErrorCode`	`byte`	The file-system-specific error code returned by the server.

This is a special exception is used to indicate end-of-file (EOF). Thrown when an operation reaches the end of a file.

Last modified: 02 March 2026