FluentFTP is a fully managed FTP and FTPS library for .NET & .NET Standard, optimized for speed. It provides extensive FTP commands, File uploads/downloads, SSL/TLS connections, Automatic directory listing parsing, File hashing/checksums, File permissions/CHMOD, FTP proxies, FXP transfers, UTF-8 support, Async/await support, Powershell support and more.

It is written entirely in C#, with no external dependencies. FluentFTP is released under the permissive MIT License, so it can be used in both proprietary and free/open source applications.

Features

• Full support for FTP, FXP, FTPS (FTP over SSL), FTPS with client certificates and FTPS with CCC (for FTP firewalls)
• File management:
  • File and directory listing for all major server types (Unix, Windows/IIS, Azure, Pure-FTPd, ProFTPD, Vax, VMS, OpenVMS, Tandem, HP NonStop Guardian, IBM OS/400, AS400, Windows CE, Serv-U, etc)
  • Fully recursive directory listing and directory deletion (manual recursion and server-side recursion)
  • Easily upload and download a file from the server with progress tracking
  • Easily upload and download a directory from the server with easy synchronization modes
  • Easily transfer a file or folder directly from one server to another using the FXP protocol
  • Conditionally transfer files using rule based whitelisting and blacklisting
  • Automatically verify the hash of a file & retry transfer if hash mismatches
  • Configurable error handling (ignore/abort/throw) for multi-file transfers
  • Easily read and write file data from the server using standard streams
  • Create, append, read, write, rename, move and delete files and folders
  • Recursively deletes folders and all its contents
  • Get file/folder info (exists, size, security flags, modified date/time)
  • Get and set file permissions (owner, group, other)
  • Absolute or relative paths (relative to the "working directory")
  • Compare a local file against a remote file using the hash/checksum (MD5, CRC32, SHA-1, SHA-256, SHA-512)
  • Dereference of symbolic links to calculate the linked file/folder
  • Throttling of uploads and downloads with configurable speed limit
• FTP protocol:
  • Automatic detection of working connection settings and automatic connection negotiation
  • Automatic detection of the FTP server software and its capabilities
  • Extensive support for FTP commands, including some server-specific commands
  • Easily send server-specific FTP commands using the Execute() method
  • Explicit and Implicit SSL connections are supported for the control and data connections using .NET's SslStream
  • Passive and active data connections (PASV, EPSV, PORT and EPRT)
  • Supports Unix CHMOD, PRET, ProFTPD's SITE MKDIR and RMDIR commands, Serv-U's RMDA command
  • Supports FTP Proxies (User@Host, HTTP 1.1, BlueCoat)
  • FTP command logging using TraceListeners (passwords omitted) to trace or log output to a file
  • SFTP is not supported as it is FTP over SSH, a completely different protocol (use SSH.NET for that)
• Asynchronous support:
  • Synchronous and asynchronous methods using async/await for all operations
  • Asynchronous methods for .NET 4.0 and below using IAsyncResult pattern (Begin*/End*)
  • Asynchronous support for the IAsyncEnumerable pattern for GetListing methods (see GetListingAsyncEnumerable)
  • All asynchronous methods can be cancelled midway by passing a CancellationToken
  • All asynchronous methods honor the ReadTimeout and automatically cancel themselves if timed out
  • Improves thread safety by cloning the FTP control connection for file transfers (optional)
  • Implements its own internal locking in an effort to keep transactions synchronized
• Extensible:
  • Easily add support for custom non-standard FTP servers (see the Custom Servers page)
  • Easily add support for more file or directory filtering rules (simply extend FtpRule)
  • Easily add support for more proxy types (simply extend FtpClientProxy)
  • Easily add unsupported directory listing parsers (see the CustomParser example)
  • Easily add custom logging/tracing functionality using FtpTrace.AddListener
  • Easily add your own Powershell commands by extending the scripts in FluentFTP.ps1

Releases

Stable binaries are released on NuGet, and contain everything you need to use FTP/FTPS in your .Net/CLR application. For usage see the Quick Start Example and the Documentation wiki.

• Nuget (latest)
• Release Notes (features and fixes per release)

FluentFTP works on .NET and .NET Standard/.NET Core.

FluentFTP is also supported on these platforms: (via .NET Standard)

• Mono 4.6
• Xamarin.iOS 10.0
• Xamarin.Android 10.0
• Universal Windows Platform 10.0

Binaries for all platforms are built from a single Visual Studio 2019 Project. You will need VS 2019 to build or contribute to FluentFTP.

Example Usage

To get started, check out the Quick start example in C#.

We also have extensive examples for all methods in C# and VB.NET.

Documentation and FAQs

Check the Wiki.

Contributors

Special thanks to these awesome people who helped create FluentFTP!

Supporters

FluentFTP is supported by these generous organizations:

JetBrains provides cutting-edge IDE and developer productivity tools.	Balsamiq provides rapid and effective wireframing and UI design tools.	YourKit provides a market-leading intelligent Java Profiler and .NET Profiler.