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Release Notes

37.1.1

  • Fix: Disable SSL Buffering in .NET 6 as it was in .NET 5

37.1.0

  • Major: Added support for SOCKS4 proxy servers using the FtpClientSocks4Proxy client class (thanks fire-lizard)
  • Major: Added support for SOCKS4a proxy servers using the FtpClientSocks4aProxy client class (thanks fire-lizard)

37.0.6

  • New: Detect Rumpus FTP servers for Mac (allows for future server-specific handling)
  • New: Detect ABB IDAL FTP servers (allows for future server-specific handling)
  • New: Add DisconnectWithShutdown property to configure shutdown signal on disconnect
  • Change: Rename UngracefullDisconnect to DisconnectWithQuit
  • Fix: Resolve long timeouts after socket stream disconnected

37.0.5

  • Fix: IOException in synchronous methods when AUTH TLS is rejected (thanks yatlor)

37.0.4

  • New: Support for .NET 6.0
  • Fix: For FileZilla FTP Server, TLS socket would be incorrectly closed (thanks michael-hoedl)
  • Fix: For Windows Server IIS, the space at the beginning of the file name is excluded (thanks tYoshiyuki)

37.0.3

  • Change: Remove Obsolete from all OpenRead/OpenWrite/OpenAppend API as it is not planned for deletion
  • Fix: Calculate checksum for files with whitespaces in their name (thanks simonefil)

37.0.2

  • Fix: z/OS: GetListing: Handle large file sizes reported in Used column (thanks FanDjango)
  • Fix: z/OS: IsRoot improved to handle Unix realm as well (thanks FanDjango)
  • Fix: DownloadFile correctly handles connection interruptions and resumes partially downloaded files (thanks FanDjango)

37.0.1

  • Fix: SetWorkingDirectoryAsync doesn't set working directory due to missing cache invalidation (thanks FanDjango)
  • Fix: Handle multiline FEAT replies to support ProFTPD capability reporting (thanks FanDjango)
  • Fix: Correctly disposes CancellationTokenSource created during ConnectAsync (thanks jnyrup)
  • Fix: Printing of error messages in some ArgumentNullException and ArgumentOutOfRangeException (thanks jnyrup)
  • Fix: Wrong file parser being selected for servers: NonStop/Tandem, OpenVMS, Windows CE, IIS (thanks jnyrup)
  • Performance: Improve performance of async methods that return constant values (thanks jnyrup)

37.0.0

  • New: Detect Titan FTP servers (allows for future server-specific handling)
  • Fix: Validation of short CRC checksum fails due to mismatch of hex hash format
  • Change: Remove redundant and extranous OpenRead/OpenWrite/OpenAppend API and keep only 2 methods each
  • Change: Mark OpenRead/OpenWrite/OpenAppend API as obsolete with warnings and recommend high level API
  • Change: Cleanup dependencies for netstandard2.0, netstandard2.1 and net5.0 targets (thanks jnyrup)

36.1.0

  • Change: Restore the older OpenRead API to prevent breaking older projects that depend on it (thanks FanDjango)

36.0.0

  • New: GetZOSFileSize is now removed and superceeded by GetFileSize which handles z/OS servers
  • New: Refactor and cleanup z/OS specific logic for: post-connect init, IsRoot, GetFileSize
  • Change: OpenRead API no longer supports checkIfFileExists argument (thanks FanDjango)
  • Fix: z/OS & ASCII transfers: Don't get filesize if filesize already known during downloading (thanks FanDjango)
  • Fix: z/OS UploadFilesAsync: Fixed IBM MVS File uploading path calculation (thanks FanDjango)
  • Fix: Close underlying FTP socket connection on async cancellation on .NET Core (thanks datvm)
  • Fix: Correctly handle FTP connection timeout on .NET Core (thanks datvm)
  • Fix: Enable detection of IBM OS/400 servers that were disabled during server-specific handling

35.2.3

  • New: Detect PyFtpdLib FTP servers (allows for future server-specific handling)
  • Fix: Pass CancellationToken to all methods that support cancellation (thanks 0xced)
  • Fix: Error check on z/OS init commands to ensure they executed correctly (thanks FanDjango)
  • Fix: Improve FileExists for z/OS: better no SIZE, no MDTM on non HFS files (thanks FanDjango)
  • Fix: DownloadFile for z/OS: SetDataType directly before the RETR command (thanks FanDjango)
  • Fix: IsAuthenticated is not updated when calling ConnectAsync (thanks datvm)
  • Fix: Reduce number of times SetDataType is called internally to improve performance (thanks FanDjango)
  • Fix: Fail to detect z/OS server if Unix is also mentioned in welcome message (thanks FanDjango)

35.2.2

  • Fix: z/OS GetFileSize: Ignore SIZE capability even if advertised by server as pointless (thanks FanDjango)
  • Fix: z/OS DownloadFile: Read to end of stream because filesize is always inaccurate (thanks FanDjango)
  • Fix: z/OS DownloadFile: Fix check for infinity or NaN progress values (thanks FanDjango)

35.2.1

  • Fix: z/OS GetListing: Path can be null causing an exception (thanks FanDjango)
  • Fix: z/OS GetListing: Large files overflow on size calculation resulting in negative file sizes (thanks FanDjango)
  • Fix: z/OS GetListing: Listing fails unless users CWD to the correct folder of a non-RECFM=U PDS (thanks FanDjango)

35.2.0

  • New: Support for connecting to FTP/FTPS servers via a SOCKS5 proxy (thanks bjth)
  • New: Autoconfigure IBM z/OS FTP server using SITE DATASETMODE and QUOTESOVERRIDE (thanks FanDjango)
  • Fix: GetListing item Fullname is now correctly calculated for Unix and z/OS systems (thanks FanDjango)

35.1.0

  • New: GetZOSFileSize APIs to get file size of IBM z/OS file system objects (thanks FanDjango)
  • New: GetZOSListRealm APIs to get realm of IBM z/OS servers (thanks FanDjango)
  • New: Enhance the z/OS listing parser to get LRECL (via XDSS) on behalf of user (thanks FanDjango)
  • Fix: AutoConnect detects rejected certificates on connection and raises FtpInvalidCertificateException (thanks FanDjango)
  • Fix: FtpListOption.ForceList is not being honored by GetListing and machine listings are used instead (thanks FanDjango)
  • Fix: GetListing regression causing many untrue parse fail warnings (thanks FanDjango)
  • Fix: GetObjectInfo is overwriting Modified date of a FtpListItem if the consecutive MDTM command fails (thanks Dylan-DutchAndBold)
  • Fix: reusing same FtpClient should reload server capabilities unless its a cloned connection (thanks FanDjango)
  • Fix: Executing CWD using Execute API does not invalidate internal CWD cache (thanks FanDjango)

35.0.5

  • Fix: UploadFile fails to upload in FtpRemoteExists.Resume mode even if stream is seekable

35.0.4

  • Fix: AutoConnect loads the newly detected FtpProfile to update properties & encryption
  • Fix: Passive connections work in FtpEncryptionMode.Auto mode and FTPS connection fails

35.0.3

  • Fix: AutoDetect correctly recommends FtpEncryptionMode.None if FTPS connection failed
  • Fix: AutoDetect crashes because attempting to read socket type after disconnected

35.0.2

  • Major: AutoDetect does not cycle through data connection types during connection as it is irrelevant
  • Major: AutoDetect calculates a data connection type after connection succeeds (EPSV or PASV)

35.0.1

  • Fix: ConnectAsync now correctly creates a FTP server-specific handler to match Connect behaviour

35.0.0

  • Automatic connection

    • Major: AutoConnect takes far fewer connection attempts due to improvements in connection handling
    • Major: AutoConnect and AutoDetect are much faster and smarter and only try each setting once if possible
    • Major: AutoDetect only tries Explicit and Implicit FTPS once and then falls back to plaintext FTP
    • Major: AutoDetect only tries UTF-8 and never ASCII because most UTF-8 servers don't advertise it
    • New: AutoDetect verifies if the server supports UTF-8 and updates the FtpProfile accordingly
    • New: FtpProfile code generation adds a warning message if the encoding mode is unverified
    • New: AutoConnectAsync now uses true asynchronous connection backed by new AutoDetectAsync
    • New: AutoConnect now auto computes an FTP port unless a non-standard port is already set
    • New: AutoConnect uses the main FtpClient connection rather than creating one clone per attempt
    • Fix: AutoConnect remains connected to the first working profile rather than connecting twice on success
    • Fix: AutoConnect reuses the same connection for FTPS and FTP rather than connecting again
    • Fix: Ensure FTP server capabilities are loaded during AutoDetect if original connection is blank
    • Fix: AutoConnect and AutoDetect will now throw exceptions for permanent failures (bad host/credentials)
    • Fix: ConnectAsync now correctly resets the state flags to match Connect behaviour
    • Fix: Port now correctly calculates the default port 21 when using FtpEncryptionMode.Auto

  • Appending and resuming uploads

    • Major: The setting FtpLocalExists.Append is now renamed to FtpLocalExists.Resume
    • Major: The setting FtpRemoteExists.Append is now renamed to FtpRemoteExists.Resume
    • Major: Split FtpRemoteExists.Append into two properties with distinct behaviour (Resume and AddToEnd)
    • Major: Improvements to UploadFile and UploadFileAsync to support appending and resuming of uploads
    • Major: UploadFile always sets the length of the remote file stream before uploading, appending or resuming
    • Major: UploadFile skips uploading in Resume mode if local and remote file are equal length
    • Fix: Implementation for resuming uploads using UploadFile based on fixes in UploadFileAsync

  • Machine listings

    • Major: GetListing prefers using Machine Listings over LIST command, unless a custom list parser is set
    • Fix: ListingParser property is updated according to auto-detected parser during Connect and ConnectAsync
    • Fix: DeleteDirectory and DereferenceLink methods no longer use ForceList and so prefer using Machine Listings

  • File hashing

    • Major: All low-level hash methods are now inaccessible and GetChecksum is the only recommended approach
    • Fix: GetChecksum now prints function call logs and sanitizes the input path
    • New: GetChecksum switches to the first preferred hash algorithm for HASH command if no algorithm is specified
    • New: GetChecksum validates if the required algorithm is unsupported and throws FtpHashUnsupportedException
    • New: GetChecksum validates if hashing is unsupported by the server and throws FtpHashUnsupportedException
    • Fix: GetChecksumAsync now takes the cancellation token last to follow conventions (argument reorder)
    • Fix: Improved extraction of hash checksum when using the HASH command
    • Fix: Improved extraction of hash checksum when using the MD5, SHA1, SHA256, SHA512 or X-series commands
    • New: SetHashAlgorithm now only modifies the hash algorithm if it has changed

  • Path sanitization

    • Fix: All high level API methods sanitize input paths to improve robustness
    • Fix: GetWorkingDirectory always sanitizes the returned working path directory
    • Fix: Correctly handle server-specific absolute FTP paths for async operations
    • Fix: All function call logs now print the sanitized path rather than raw input path

  • Path improvements

    • Major: GetWorkingDirectory is now extremely fast and caches the working dir path for subsequent calls
    • Fix: FileExists supports checking name listings for Windows NT servers which use invalid slashes
    • Fix: Root directory FTP paths no longer return ./ and instead return /

  • Other improvements

    • Major: All legacy asynchronous methods using IAsyncResult pattern have been removed (outdated since 2012)
    • Fix: FXP file transfers for glFTPd server always try PASV and CPSV commands to get passive port
    • Fix: Add logging for skipped files in UploadFile
    • Fix: Add file path details in skipped files logged by UploadFile and DownloadFile
    • New: GetNameListing to print results of name listing as verbose logs, similar to GetListing
    • New: GetFileSize and GetFileSizeAsync to support a configurable return value if the file does not exist
    • New: FtpFolderNameRule now supports startSegment to skip checking root directory folder names
    • New: FtpFolderNameRegexRule now supports startSegment to skip checking root directory folder names

34.0.2

  • New: Add support for IsAuthenticated property which enables detection of FTP connection and authentication
  • Fix: Improved file path calculation when uploading files to IBM zOS running MVS (thanks arafuls)
  • Fix: Detection of file exists for Windows NT Servers fails due to invalid slashes
  • Fix: Ensure CompletionCode is always null-checked to fix edge cases and comply with existing implementation
  • Fix: Possible wrong IP when connecting to Azure FTP Server using EPSV command (thanks jsantos74)

34.0.1

  • Fix file path calculation when uploading files to IBM zOS running MVS (thanks arafuls)
  • Detect fully-qualified directory when using data sets on IBM zOS running MVS (thanks arafuls)

34.0.0

  • Major: Refactor and cleanup helpers & extension methods
  • Major: Changed namespace of FtpTrace to FluentFTP.Helpers
  • Major: Changed namespace of FtpListParser to FluentFTP.Helpers
  • Major: You need to import FluentFTP.Helpers to gain access to FTP extension methods
  • Major: Changed visibility of various internal FTP helpers to internal to prevent external access
  • New: Ability to set a local IP address to be used for FTP connections (thanks daviddenis-stx)
  • New: Properties for local IP: SocketLocalIp, SocketLocalEndPoint, SocketRemoteEndPoint (thanks daviddenis-stx)

33.2.0

  • New: Ability to block certain server ports from being used during passive FTP connection (PASV/EPSV)
  • New: PassiveBlockedPorts and PassiveMaxAttempts properties to configure passive blocked ports

33.1.8

  • Fix: Add support for another server specific string to detect if file exists
  • Fix: Prevent memory leaks with FTPS on AKS by disabling ValidateCertificateRevocation by default

33.1.7

  • Fix: DownloadFile should fail if directory path is passed in localPath
  • Fix: LastReply is not set when using async methods
  • Fix: Ambiguous call when using LINQ extension methods and EF core
  • Fix: Remove dependency on System.Linq.Async and disable GetListingAsyncEnumerable

33.1.6

  • Fix: Use .NET Core API for .NET 5 builds to fix various networking and connectivity issues
  • New: Support detection of FRITZ!Box FTP servers (allows for server specific commands)

33.1.5

  • Fix: Do not force users to Connect if capabilities are not loaded (only force if Capabilities are read before connecting)

33.1.4

  • Fix: Conditionally hard-abort AutoConnect only if the credentials were incorrect

33.1.3

  • New: LogToFile and LogToConsole are now available on .NET Framework / .NET 5.0
  • Fix: Capabilities & HashAlgorithms are returned if they are loaded regardless of connection status

33.1.2

  • Fix: Prevent Capabilities & HashAlgorithms from causing sync-over-async path
  • Fix: NullReferenceException during UploadFile if the error message is unknown
  • Fix: If incorrect credentials are passed to AutoConnect, it does not hard abort
  • Fix: Initializing TLS Authentication hangs in .NET 5 if SslBuffering is enabled

33.1.1

  • New: Support for .NET 5.0 platform
  • New: Support for IAsyncEnumerable pattern in .NET Standard 2.0+ and .NET 5.0 (thanks hez2010)
  • New: Async variant of GetListingAsync introduced: GetListingAsyncEnumerable

33.0.3

  • Fix: URI ports not being respected when Uri constructor used (thanks julian94)
  • Fix: Respect 332 Need account for login response during FTP client authorization (thanks novak-as)
  • Fix: Set default value for restartPosition in Download method to match FtpClient method (thanks AdamLewisGMSL)
  • Fix: Improved handling for resuming upload when the connection drops (thanks pradu71)

33.0.2

  • Fix: Honor custom parsers if server-specific handler is used

33.0.1

  • Fix: Create server-specific handler if a custom handler has not been set (thanks Adhara3)

33.0.0

  • New: Reworked timezone conversion API (simply set TimeConversion and TimeZone)
  • New: Options to convert server timestamps into the format of your choice (ServerTime, LocalTime and UTC)
  • New: Support for conversion to local timezone in .NET core (set LocalTimeZone)
  • New: GetListing honors the time conversion settings of the active client
  • New: GetModifiedDate honors the time conversion settings of the active client
  • New: SetModifiedDate honors the time conversion settings of the active client
  • New: Reworked API for Custom file listing parsers (simply set ListingCustomParser on the client)
  • Fix: Drop support for legacy file listing parsing routines (FtpParser.Legacy will no longer work)
  • Fix: Unexpected time conversion occuring in GetModifiedTimeAsync
  • Change: Breaking changes to the TimeConversion property.
  • Change: Breaking changes to the TimeOffset property, which has been replaced by TimeZone

32.4.7

  • Fix: "The connection was terminated before a greeting could be read"

32.4.6

  • Platform: Add support for .NET Standard 2.1
  • Platform: Upgrade System.Net.Security from version 4.3.0 to 4.3.2 to fix security issues
  • Performance: Quickly abort detection if host is unavailable during AutoDetect/AutoConnect
  • Fix: UploadDirectory fails for some files with "Unable to read data from the transport connection" (thanks manuelxmarquez)
  • Fix: Comment for UploadFile/UploadFileAsync/DownloadFile/DownloadFileAsync methods
  • Fix: Stack overflow during connection when server responds incorrectly to PASS command

32.4.5

  • Fix: Uncatchable NullReferenceException is occasionally thrown from ConnectAsync

32.4.4

  • New: Automatic FTPS connection mode: FtpEncryptionMode.Auto which connects in FTP and attempts to upgrade to FTPS
  • New: IsEncrypted property to check if FTPS encryption is currently active for this connection
  • Fix: ValidateCertificateRevocation property was not being honored in async version (thanks kolorotur)

32.4.3

  • Fix: Ensure file is retried sucessfully when first upload/download fails with an IOException (thanks manuelxmarquez)
  • Fix: Ensure file streams read and write correctly even when no FtpClient is provided (thanks manuelxmarquez)
  • Fix: Clear custom parser when removing parser or clearing all parsers (thanks rubenhuisman)

32.4.1

  • New: LocalFileBufferSize property to control size of file buffer during local file I/O

32.4.0

  • New: UploadDirectoryDeleteExcluded property to control if excluded files are deleted during Upload (thanks philippjenni)
  • New: DownloadDirectoryDeleteExcluded property to control if excluded files are deleted during Download (thanks philippjenni)
  • Fix: Dispose AsyncWaitHandles to stop handle leak in .NET Framework 4.5 (thanks sdiaman1)
  • Fix: Implement proper cancellation support in UploadDirectory (once file transfer begins it cannot be cancelled)
  • Fix: Implement proper cancellation support in DownloadDirectory (once file transfer begins it cannot be cancelled)
  • Fix: Implement proper cancellation support in FXP TransferDirectory
  • Fix: Implement proper cancellation support in recursive GetListing
  • Fix: Correctly resume when unexpectedEOF error received during uploading a file (thanks mrcopperbeard)
  • Fix: Hide internal properties in FtpClient that are not meant to be exposed
  • Fix: Update IFtpClient with the latest set of public properties that are meant to be exposed

32.3.3

  • Fix: Downloading or uploading a directory can generate incorrect local paths

32.3.2

  • Fix: Downloading or uploading a directory can generate incorrect local paths
  • Fix: Expose LoadProfile API so it can be called by the generated code from AutoDetect

32.3.1

  • New: ListingDataType property to get file listings in ASCII/Binary
  • New: DownloadZeroByteFiles property to control if zero-byte files should be downloaded or skipped
  • Fix: Downloading 0-byte files crashes since no data downloaded

32.3.0

  • New: All server-specific handlers moved to dedicated classes that extend FtpBaseServer
  • New: Ability to handle custom non-standard FTP servers by extending FtpBaseServer
  • Fix: Only overwrite local file after the first bytes downloaded of a remote file

32.2.2

  • New: Tracking progress with FXP transfers is supported for all transfer modes
  • New: Track low-level progress with new TransferredBytes in FtpProgress class (thanks Adhara3)
  • New: FXPProgressInterval property to control how often FXP progress reports are sent
  • Fix: Hide TransferFileFXPInternal because its an internal transfer method and not to be used directly

32.2.1

  • Fix: FtpFileExtensionRule was failing to compare extensions unless they were prefixed with a dot

32.2.0

  • New: GetChecksum allows you to specify a hash algorithm to be run on the server if supported
  • New: GetChecksum has special support for switching the server-side algorithm for HASH command support
  • New: FXP file transfer now validates the file using the first mutually supported algorithm

32.1.1

  • Fix: Incorrectly formatted string returned by utility method TransferSpeedToString

32.1.0

  • New: CompareFile and CompareFileAsync methods to quickly perform various equality checks on a uploaded/downloaded file

32.0.0

  • Fix: When download fails and we need to retry on failed verification, ensure that file is re-downloaded
  • Fix: When FXP transfer fails and we need to retry on failed verification, ensure that file is re-transfered
  • Fix: When uploaded file is skipped, FtpStatus.Failed is returned instead of FtpStatus.Skipped
  • Fix: Properly handle 4xx and 5xx series of errors and indicate failure when uploading or downloading files
  • Fix: Correctly detect if server-side recursion is supported otherwise fallback to manual directory recursion
  • Fix: Only resume download of files if Append mode is selected (in Overwrite mode we restart the download)
  • Change: Upload and UploadAsync now returns FtpStatus to indicate skipped, success or failed

31.3.2

  • Fix: Proper session handling for FXP connections and disconnection of cloned connections
  • Performance: Reduce redundant file size check in DownloadFile when appending is used

31.3.1

  • New: AutoDetect and AutoConnect now auto-configure for Azure FTP servers using known connection settings
  • Improve code generation of FtpProfile to use LoadProfile rather than setting each property individually
  • Add advanced Timeout and Socket settings to FtpProfile for Azure auto configuration
  • Fix: All exception classes now inherit from FtpException
  • All exceptions and FtpProfile are now serializable in .NET Framework

31.3.0

  • New: TransferFile and TransferDirectory methods to transfer files from server to server (thanks n0ix)
  • New: FXP (File Transfer Protocol) implementation to support direct server-to-server transfers (thanks n0ix)

31.2.0

  • New: Predefined rules for filtering on file name using regular expressions (thanks n0ix)
  • New: Predefined rules for filtering on folder name using regular expressions (thanks n0ix)
  • Fix: Don't calculate ETA and percentage of FtpProgress if file size is zero (thanks Adhara3)
  • Fix: GetFilePermissions should use GetObjectInfo instead of GetListing to prevent incorrect filepaths

31.1.0

  • New: Support for MMD5 file hashing command to validate downloaded/uploaded files. (thanks n0ix)
  • Change: Disable all Begin* and End* methods for .NET 4.5 and onwards as async/await is supported.
  • Improve: GetHashAlgorithmAsync and SetHashAlgorithmAsync implemented as true async methods with cancellation support
  • Improve: GetObjectInfoAsync implemented as true async methods with cancellation support

31.0.0

  • New: Download and upload file methods indicate if file was transferred, skipped or failed to transfer
  • New: C# and VB.NET Examples for all file and folder transfer methods
  • New: VB.NET Examples for all methods (not included in Nuget package but available on Github)
  • Change: DownloadFile and UploadFile return FtpStatus instead of boolean flag for tri-state feedback

30.2.0

  • New: Support for XCRC FTP Command and CRC32 hash support to validate downloaded/uploaded files (thanks n0ix)

30.1.1

  • Fix: Calculation of local file path during DownloadFolder sometimes ignores base directory

30.1.0

  • New: Support multi-file progress tracking by indicating file index and local & remote path of the file
  • New: UploadDirectory and DownloadDirectory now supports tracking progress of the entire task
  • New: UploadFiles and DownloadFiles now supports tracking progress for both sync/async methods
  • Fix: Update IFtpClient interface by adding new UploadDirectory and DownloadDirectory methods
  • Fix: Correctly determine file exists on servers that don't support SIZE command and return error 550
  • Fix: Support more strings to determine if file exists using SIZE command

30.0.0

  • New: UploadDirectory and UploadDirectoryAsync methods to recursively upload or mirror a directory
  • New: DownloadDirectory and DownloadDirectoryAsync methods to recursively download or mirror a directory
  • New: Rule engine to filter files that should be uploaded/downloaded according to multiple user-defined rules
  • New: Predefined rules for filtering on folder name, useful for blacklisting certain system folders
  • New: Predefined rules for filtering on file name or file extensions, useful for transferring a subset of files
  • New: Predefined rules for filtering on file size, useful for filtering out very large files
  • New: Ability to determine parent/self/child directories in listing using SubType property of FtpListItem
  • Fix: Machine listings sometimes cause infinite recursion in GetListing when recursing into self directory
  • Change: CreateDirectory and CreateDirectoryAsync now return a flag indicating if it was created or skipped
  • Change: Use public fields instead of public properties for FtpListItem
  • Change: Improve performance of CreateDirectory by skipping the directory exists check

29.0.4

  • Fix: Detect "file size not allowed in ASCII" string for French FTP servers

29.0.3

  • Fix: TimeoutException when trying to read FTP server reply after Download/Upload

29.0.2

  • New: Add SendHost and SendHostDomain to control if HOST command is sent after handshake (thanks dansharpe83)

29.0.1

  • Fix: Read stale NOOP responses after file transfer and also after 226 Transfer complete (thanks aliquid)
  • Fix: Correct default value for TimeConversion property to assume UTC timestamps

29.0.0

  • New: Support .NET Standard 2.0
  • New: Keep control socket alive during long file transfers using NOOP (thanks aliquid)
  • New: Add NoopInterval property to control interval of NOOP commands (thanks aliquid)
  • New: Add TimeConversion property to control if timestamps are converted from UTC into local time
  • Refactor: Rename FtpExists to FtpRemoteExists to make its usage clear
  • New: Support detection of IBM z/OS and MVS FTP OS and server (allows for server specific commands)
  • New: New constructors for FtpClient to support hostnames in Uri format
  • Fix: Always send progress reports after file download, even for zero-length files

28.0.5

  • New: ValidateCertificateRevocation property to control if certificate revocation is checked.

28.0.4

  • New: ValidateAnyCertificate property to validate any received server certificate, useful for Powershell
  • Fix: Default SSL protocol used in .NET 4.5+ release is now TLS 1.2 (latest supported protocol)

28.0.3

  • New: Override the server-specific recursive LIST detection by setting RecursiveList
  • Fix typo in IP parsing regex that causes fallback to Host IP to fail (thanks Andy Whitfield)

28.0.2

  • Fix: Verification of the MD5 Hash when file name contains spaces (thanks Nimelo)

28.0.1

  • Fix: Safely absorb TimeoutException thrown after the file has fully uploaded/downloaded

28.0.0

  • New: Progress reporting for synchronous methods Upload, Download, UploadFile and DownloadFile are now sent via delegates
  • Fix: Correctly send progress for synchronous methods and retain IProgress for async methods

27.1.4

  • Fix: Correctly assume Unix file listing parser for SunOS & Solaris servers
  • Fix: Safely absorb TimeoutException thrown after the file has fully uploaded/downloaded

27.1.3

  • New: Support detection of Sun OS Solaris FTP OS and server (allows for server specific commands)
  • Fix: UploadFile fails when destination folder is empty on SunOS (550 error)

27.1.2

  • Fix: Unable to upload files to OpenVMS servers if path contains numeric characters
  • Fix: Assume FTP commands supported by OpenVMS HGFTP server if FEAT not supported
  • FiX: Improve detection of OpenVMS absolute paths
  • Fix: Connect & ConnectAsync throw ArgumentException when passing an incomplete FtpProfile

27.1.1

  • New: Auto-detect the correct FTP listing parser when SYST command fails (IIS, Azure, OpenVMS)
  • New: Assume FTP commands supported by OpenVMS HGFTP server
  • FiX: Support edge case for OpenVMS absolute paths (directive can be alpha-numeric)

27.1.0

  • New: Improved transfer rate throttling when using an upload/download speed limit (thanks wakabayashik)

27.0.3

  • New: Support detection of XLight FTP server software (allows for server specific commands)
  • New: Partial support for getting directory listing using STAT command (GetListing supports new FtpListOption.UseStat)
  • Fix: GetFileSize always returns 0 instead of correct file size (thanks RadiatorTwo)

27.0.2

  • Fix: FileExists and FileExistsAsync support switching to binary mode for servers that need it

27.0.1

  • Fix: Error using BlueCoat proxy to an FTP server on a port other than port 21
  • Fix: Error using UserAtHost proxy to an FTP server on a port other than port 21

27.0.0

  • New: Change Capability API to return a list instead of bitwise enum (to support more than 32 distinct capabilities)
  • New: Change custom parsers to take capabilities as a list instead of bitwise enum (to match client implementation)
  • New: Support detection of FTP2S3 gateway server software (allows for server specific commands)
  • New: Support detection of server-specific capabilities of Serv-U FTP Gateway
  • New: Support RMDA command to quickly and recursively delete a directory from Serv-U FTP Gateway

26.0.2

  • Fix: Improve performance of GetFileSize to only switch to Binary for servers that require it
  • Fix: Ensure data type (ASCII/Binary) is correctly set during GetFileSize for servers that require it
  • Fix: Ensure data type (ASCII/Binary) is correctly set for cloned connections
  • Fix: Ensure data type (ASCII/Binary) is correctly set during GetListing and GetNameListing
  • Fix: Reset server detection state flags whenever we connect to a server, to allow for reuse of FtpClient
  • Fix: Copy server detection state flags to cloned connections to improve performance
  • Fix: Retry GetListing if temporary error "Received an unexpected EOF or 0 bytes from the transport stream"

26.0.1

  • Fix: Prefer using Passive/Active modes rather than Enhanced Active/Passive during auto-detection
  • Fix: Some FTP servers do not open a port when listing an empty folder with GetNameListing
  • Fix: Hard catch and suppress all exceptions during disposing to solve all random exceptions

26.0.0

  • New: Automatic FTP connection negotiation using AutoConnect()
  • New: Automatic detection of working FTP connection settings using AutoDetect()
  • New: C# code generation of working connection settings using FtpProfile.ToCode()
  • New: Support more capability detection commands: EPSV, CPSV, NOOP, CLNT, SSCN, SITE commands for ProFTPd
  • New: Improve transfer performance by only attempting EPSV once and then never using it again for that connection
  • New: Support MKDIR & RMDIR commands specially for ProFTPd to quickly create and delete a directory on the server-side
  • New: Support PRET command before downloading or uploading files for servers like ProFTPd & DrFTPd
  • New: Support detection of BFTPd server software (allows for server specific commands)
  • Fix: When uploading files in FtpExists.NoCheck mode, file size check should not be done
  • Fix: Some FTP servers do not open a port when listing an empty folder (thanks Mortens4444)
  • Fix: OpenRead with EnableThreadSafeDataConnections always transfers in ASCII (thanks ts678)
  • Refactor: Delete legacy static methods: OpenRead, OpenWrite, OpenAppend (dynamic versions still exist)
  • Refactor: Move CalcChmod from FtpClient to FtpExtensions (as part of repository cleanup task)

25.0.6

  • Fix: Async methods do not work with Active FTP mode and SSL/encryption (thanks Mortens4444)
  • Fix: For OpenVMS absolute paths may not contain slashes but are still absolute (3rd revision)

25.0.5

  • Fix: Divide-by-zero exceptions while calculating progress of file uploads/downloads

25.0.4

  • Fix: Supress all exceptions when Disposing the underlying FtpSocketStream

25.0.3

  • Fix: Received an unexpected EOF or 0 bytes from the transport stream (thanks mikemeinz)
  • Fix: UploadFile() progress callback is not called if the file already exists on the server
  • (.NET core) Fix: Connect() method sometimes causes the thread to hang indefinitely (thanks radiy)
  • Fix: Regression of #288 where upload hangs with only a few bytes left (thanks cw-andrews)

25.0.1

  • New: FtpAuthenticationException for authentication errors (thanks erik-wramner)
  • New: Added support to detect Homegate FTP Server

25.0.0

  • New: SSL Buffering is now switchable via the SslBuffering parameter
  • Fix: SSL Buffering is automatically disabled when using FTP proxies, and enabled in all other cases
  • Fix: Revert PR #383 as it was causing regression issues in SSL connectivity
  • Fix: Disable automatic IP correction to fix connectivity issues via BlueCoat proxy servers (thanks CMIGIT)
  • Refactor: Rename FtpClientUserAtHostProxyBlueCoat to FtpClientBlueCoatProxy
  • Fix: For OpenVMS absolute paths may not contain slashes but are still absolute (2nd revision) (thanks tonyhawe)
  • Fix: Detect file existence string "Can't find file" to fix FileExists check on some servers (thanks reureu)
  • Fix: Feature parity between FileExists and FileExistsAsync methods, added support for FtpReply 550 check (thanks reureu)
  • Fix: Feature parity between UploadFile and UploadFileAsync methods, added support for AppendNoCheck handling (thanks reureu)

24.0.0

  • New: Get detailed progress information for uploads/downloads via the FtpProgress object (thanks n0ix)
  • New: Get transfer speed and ETA (estimated time of arrival) for uploads/downloads (thanks n0ix)
  • Fix: Files were uploaded in Write mode instead of Append mode when the exists mode is AppendNoCheck and we couldn't read the offset position (thanks @everbalovas)
  • Fix: Swap SslStream and BufferedStream so proxied connections with FtpClientHttp11Proxy are to connect (thanks @rmja)

23.1.0

  • New: Additional FTP Server software detection (HP NonStop/Tandem, GlobalScape EFT, Serv-U, Cerberus, CrushFTP, glFTPd)
  • New: Assume capabilities for servers that don't support FEAT (wuFTPd)
  • Fix: FileExists returns false if name listing is used and server lists filenames with the path
  • Fix: For OpenVMS absolute paths may not contain slashes but are still absolute
  • Fix: For Download() methods restartPosition should not be mandatory

23.0.0

  • New: Ability to cancel all async methods via CancellationToken (thanks WolfspiritM)
  • New: ReadTimeout is now honored by all async methods (thanks WolfspiritM)
  • New: FTP Server operating system detection (Windows, Unix, VMS, IBM/OS400)
  • (.NET core) Fix: GetListing blocking with no timeout (thanks WolfspiritM)
  • (.NET core) Fix async methods by not using the the async read function (thanks WolfspiritM)

22.0.0

  • New: Ability to resume a download via existsMode on DownloadFile() and DownloadFiles() (thanks n0ix)
  • New: Ability to turn off checking for server capabilities using FEAT command (thanks nhh-softwarehuset)
  • Fix: Add workaround if a server advertises a non-routeable IP in PASV Mode (thanks n0ix)
  • Fix: Recursive directory deletion tries to delete the same file twice (because GetListing is also recursive)

21.0.0

  • New: OnLogEvent callback to get logs in the context of indivivdual FtpClient connections
  • Fix: All logging is done in the context of an FtpClient and then passed to FtpTrace listeners
  • Signature for custom list parsers has changed, FtpClient argument added to the end

20.0.0

  • New: FTP Server software detection (PureFTPd, VsFTPd, ProFTPD, FileZilla, OpenVMS, WindowsCE, WuFTPd)
  • New: Detect if the FTP server supports recursive file listing (LIST -R) command using whitelist
  • New: GetListing will manually recurse through directories if FtpListOption.Recursive is set and server does not support recursion
  • New: Added LastReply property which returns the last FtpReply recieved from the server.
  • New: Added new upload option AppendNoCheck to append to a file on the server without checking if it exists (thanks @everbalovas)
  • Fix: During upload, respond to any error in 5xx series, not just 550 (thanks stengnath)
  • Fix: Various fixes to UploadFileAsync based on fixes already implemented in UploadFile

19.2.4

  • Fix: UploadFilesAsync with errorHandling deletes the entire directory instead of specific files
  • Fix: Server responds to EPSV with 425 "Data connection failed" but connects with PASV (thanks ejohnsonTKTNET)
  • Fix: Use proper async configuration for .NET Async methods (thanks ejohnsonTKTNET)
  • Fix: Improve implementation of upload and download resuming in Async methods (thanks ejohnsonTKTNET)

19.2.3

  • Fix: UploadFile() or UploadFiles() sometimes fails to create the remote directory if it doesn't exist
  • Fix: DownloadDataType Binary value ignored on ASCII-configured FTP servers
  • Performance improvement: Added BufferedStream between SslStream and NetworkStream (thanks stengnath)
  • Fix: When the FTP server sends 550, transfer is received but not confirmed (thanks stengnath)
  • Fix: Make Dispose method of FTPClient virtual (thanks @martinbu)
  • Fix: OpenPassiveDataStream/Async() uses the target FTP host instead of the configured proxy (thanks @rmja)
  • Fix: FileExists() for Xlight FTP Server (thanks @oldpepper)
  • Fix: FTPD "550 No files found" when folder exists but is empty, only in PASV mode (thanks stengnath)
  • Fix: Many unexpected EOF for remote file IOException on Android (thanks @jersiovic)
  • Fix: Race condition when BeginInvoke calls the callback before the IAsyncResult is added (thanks stengnath)

19.2.2

  • Fix: Prevent socket poll from hammering the server multiple times per second
  • Fix: Allow using absolute paths that include drive letters (Windows servers)
  • Performance improvement: Only change the FTP data type if different from required type
  • Performance improvement: Download all files in EOF mode and skip the file size check, unless download progress is required
  • Added all missing async versions of FTP methods to IFtpClient
  • System: Certain core FTP socket handling operations have been changed to improve reliability & performance.

19.1.4

  • Fix: Fix hang in TLS activation because no timeout is set on the underlying NetworkStream (thanks @iamjay)

19.1.3

  • Added async versions of FTP methods to IFtpClient (thanks @peterfortuin)
  • Fix: Fixes when ActivePorts is specified in active FTP mode (thanks @ToniMontana)
  • Fix: Throw OperationCanceledException instead of FtpException when cancellation is requested (thanks taoyouh)

19.1.2

  • Fix: Add support for checking if file exists on Serv-U FTP Server
  • Fix: Make IFtpClient inherit from IDisposable (thanks @repl-andrew-ovens)
  • (UWP) Fix: UWP does not allow File.Exists() to run in UI thread (thanks taoyouh)

19.1.1

  • Fix: When downloading files in ASCII mode, file length is unreliable therefore we read until EOF
  • Fix: When upload/download progress is indeterminate, send -1 instead of NaN or Infinity
  • Fix: NetStream was not assigned in FtpSocketStream for .NET Standard in active FTP mode (thanks @ralftar)
  • Fix: CurrentDataType was not set for ASCII transfers in DownloadFileAsync/UploadFileAsync (thanks taoyouh)
  • Fix: Sometimes FtpSocketStream and FtpDataStream are not disposed in FtpSocketStream.Dispose (thanks taoyouh)

19.1.0

  • New Progress reporting for UploadFile & DownloadFile methods via IProgress
  • Fix: Stream.Position should not be set in UploadFileInternal unless supported

19.0.0

  • New Task-based async methods for .NET Standard and .NET Fx 4.5 (thanks taoyouh)
  • New async methods for UploadFile, DownloadFile, UploadFiles & DownloadFiles (thanks artiomchi)
  • (UWP) Fix: FileNotFoundException with reference System.Console (thanks artiomchi)
  • (.NET core) Fix: Thread suspends when calling UploadFile or DownloadFile (thanks artiomchi)
  • (.NET core) Fix: File download hangs inconsistently when reading data from stream (thanks @artiomchi, bgroenks96)
  • (.NET core) Fix: Stream does not dispose due to wrong handling of closing/disposing (thanks artiomchi)
  • Fix: File upload EOS bug when calling Stream.Read (thanks bgroenks96, @artiomchi, @taoyouh)
  • Fix: DownloadFileInternal not recognizing the download data type with EnableThreadSafeConnections (thanks bgroenks96)
  • (Backend) Migrate to a single VS 2017 solution for all frameworks (thanks artiomchi)
  • (Backend) Continuous Integration using AppVeyor (thanks artiomchi)

18.0.1

  • Add IFtpClient interface to build unit tests upon main FtpClient class (thanks Kris0)
  • Disposing FtpDataStream reads server reply and closes the underlying stream (thanks Lukazoid)

18.0.0

  • New SetModifiedTime API to change modified date of a server file in local timezone/UTC
  • Add type argument to GetModifiedTime, allowing for getting dates in UTC/Local timezone
  • Breaking changes to Async API of GetModifiedTime (addition of type argument)
  • GetModifiedTime and SetModifiedTime now honor the TimeOffset property in FtpClient
  • Add checkIfFileExists to OpenRead, OpenAppend and OpenWrite to skip GetFileSize check
  • Fix issue where InnerException is null during a file transfer (upload/download)
  • Improve performance of typical uploads/downloads by skipping the extra file exists check

17.6.1

  • Fix for CreateDirectory and DirectoryExists to allow null/blank input path values
  • Fix for GetFtpDirectoryName to return correct parent folder of simple folder paths (thanks ww898)

17.6.0

  • Add argument validation for missing/blank arguments in : Upload, Download, UploadFile(s), DownloadFile(s), GetObjectInfo, DeleteFile, DeleteDirectory, FileExists, DirectoryExists, CreateDirectory, Rename, MoveFile, MoveDirectory, SetFilePermissions, Chmod, GetFilePermissions, GetChmod, GetFileSize, GetModifiedTime, VerifyTransfer, OpenRead, OpenWrite, OpenAppend
  • Disable all async methods on .NET core due to persistant PlatformUnsupported exception (if you need async you are free to contribute a non-blocking version of the methods)

17.5.9

  • Increase performance of GetListing by reading multiple lines at once (BulkListing property, thanks sierrodc)

17.5.8

  • Add support for parsing AS400 listings inside a file (5 fields) (thanks rharrisxtheta)
  • Retry interpreting file listings after encountered invalid date format (thanks rharrisxtheta)
  • Always switch into binary mode when running SIZE command (thanks rharrisxtheta)

17.5.7

  • Honor UploadDataType and DownloadDataType in all sync/async cases (thanks rharrisxtheta)
  • Force file transfers in BINARY mode for known 0 byte files (thanks rharrisxtheta)
  • Allow file transfers in ASCII mode if the server doesn't support the SIZE command (thanks rharrisxtheta)

17.5.6

  • Fix NullReferenceException when arguments are null during FtpTrace.WriteFunc

17.5.5

  • Remove internal locking for .NET Standard 1.4 version since unsupported on UWP

17.5.4

  • Remove dependency on System.Threading.Thread for .NET Standard 1.4 version (for UWP)

17.5.3

  • Allow transferring files in ASCII/Binary mode with the high-level API (UploadDataType, DownloadDataType)

17.5.2

  • Add support for .NET 3.5 and .NET Standard 1.4 (supports Universal Windows Platform 10.0)

17.5.1

  • Add FtpTrace.LogToConsole and LogToFile to control logging in .NET core version

17.5.0

  • Add PlainTextEncryption API to support FTPS servers and plain-text FTP firewalls (CCC command)
  • FluentFTP now uses unsafe code to support the CCC command (inside FtpSslStream)
  • If you need a "non unsafe" version of the library please add an issue

17.4.4

  • Add logging for high-level function calls to improve remote debugging (FtpTrace.LogFunctions)
  • Add settings to hide sensitive data from logs (FtpTrace.LogIP, LogUserName, LogPassword)
  • Add RecursiveList to control if recursive listing should be used
  • Auto-detect Windows CE and disable recursive listing during DeleteDirectory()

17.4.2

  • Add UploadRateLimit and DownloadRateLimit to control the speed of data transfer (thanks Danie-Brink)

17.4.1

  • Fix parsing of LinkTarget during GetListing() on Unix FTP servers
  • Improve logging clarity by removing "FluentFTP" prefix in TraceSource

17.4.0

  • Add MoveFile() and MoveDirectory() to move files and directories safely

17.3.0

  • Automatically verify checksum of a file after upload/download (thanks jblacker)
  • Configurable error handling (abort/throw/ignore) for file transfers (thanks jblacker)
  • Multiple log levels for tracing/logging debug output in FtpTrace (thanks jblacker)

17.2.0

  • Simplify DeleteDirectory() API - the force and fastMode args are no longer required
  • DeleteDirectory() is faster since it uses one recursive file listing instead of many
  • Remove .NET Standard 1.4 to improve nuget update reliability, since we need 1.6 anyway

17.1.0

  • Split stream API into Upload()/UploadFile() and Download()/DownloadFile()

17.0.0

  • Greatly improve performance of FileExists() and GetNameListing()
  • Add new OS-specific directory listing parsers to GetListing() and GetObjectInfo()
  • Support GetObjectInfo() even if machine listings are not supported by the server
  • Add existsMode to UploadFile() and UploadFiles() allowing for skip/overwrite and append
  • Remove all usages of string.Format to fix reliability issues caused with UTF filenames
  • Fix issue of broken files when uploading/downloading through a proxy (thanks Zoltan666)
  • GetReply() is now public so users of OpenRead/OpenAppend/OpenWrite can call it after

16.5.0

  • Add async/await support to all methods for .NET 4.5 and onwards (thanks jblacker)

16.4.0

  • Support for .NET Standard 1.4 added.

16.2.5

  • Add UploadFiles() and DownloadFiles() which is faster than single file transfers
  • Allow disabling UTF mode using DisableUTF8 API

16.2.4

  • First .NET Core release (DNXCore5.0) using Visual Studio 2017 project and shared codebase.
  • Support for .NET 2.0 also added with shims for LINQ commands needed.

16.2.1

  • Add FtpListOption.IncludeSelfAndParent to GetListing

16.1.0

  • Use streams during upload/download of files to improve performance with large files

16.0.18

  • Support for uploading/downloading to Streams and byte[] with UploadFile() and DownloadFile()

16.0.17

  • Added high-level UploadFile() and DownloadFile() API. Fixed some race conditions.

16.0.14

  • Added support for FTP proxies using HTTP 1.1 and User@Host modes. (thanks L3Z4)