How to set up an SFTP server using pkg/sftp in Go?

Integrate the server with Go's crypto/ssh package for authentication; examples on pkg.go.dev show basic setup, but you'll need to handle file system permissions and connection management manually.

pkg/sftp vs scp for file transfers in Go – which is better?

pkg/sftp is better for programmatic operations within Go apps, offering features like directory listings and file stats, while scp is a CLI tool with simpler use but less control.

Does pkg/sftp support resumable file transfers?

No, it doesn't have built-in support for resumable transfers; you'd need to implement custom logic for handling partial uploads or downloads based on file offsets.

How to handle authentication with pkg/sftp client?

Use Go's crypto/ssh package for SSH key or password authentication; the sftp package relies on established SSH connections, so setup involves standard SSH configuration.

Is pkg/sftp production-ready for large-scale deployments?

Yes, it's used in production, but performance depends on SSH connection overhead and Go's concurrency model; test with your workload for scaling issues.

Can I use pkg/sftp with non-standard SFTP servers?

It aims to follow the SFTP protocol spec, but compatibility may vary with servers using extensions; check with your target server or add custom handling if needed.

Open-Awesome

sftp

BSD-2-ClauseGov1.13.10

SFTP client and server implementation for Go, providing file system operations over SSH connections.

GitHub

1.6k stars395 forks0 contributors

What is sftp?

pkg/sftp is a Go package that provides both SFTP client and server implementations for secure file transfer operations over SSH connections. It enables Go applications to perform remote file system operations like reading, writing, listing, and managing files on SSH servers. The package integrates with Go's standard crypto/ssh package and offers an API that mirrors Go's os package for familiarity.

Target Audience

Go developers who need to implement SFTP functionality in their applications, whether as clients connecting to remote servers or as servers providing file access to SFTP clients. This includes developers building automation tools, backup systems, or file management applications.

Value Proposition

Developers choose pkg/sftp because it provides a complete, idiomatic Go implementation of both SFTP client and server with an API that feels native to Go. Unlike generic SFTP libraries, it's specifically designed for Go's ecosystem and integrates seamlessly with Go's existing SSH infrastructure.

Overview

SFTP support for the go.crypto/ssh package

Use Cases

Best For

Building Go applications that need to transfer files securely over SSH
Implementing SFTP servers in Go to serve files to remote clients
Creating automation tools that interact with remote file systems
Developing backup systems that use SFTP for secure data transfer
Building file management utilities that work with SSH servers
Adding SFTP client functionality to existing Go applications

Not Ideal For

Projects requiring high-performance, low-latency file transfers with advanced optimizations like compression or delta sync
Applications needing a standalone SFTP CLI tool without writing custom Go code
Teams that prefer protocols other than SSH, such as FTP or WebDAV, for file transfers

Pros & Cons

Pros

Familiar Go Interface

The API mirrors Go's standard os package, making it intuitive for Go developers, as noted in the README where it states 'The basic operation of the package mirrors the facilities of the os package.'

Dual Client and Server

Provides both SFTP client and server implementations in one package, enabling versatile use cases like building automation tools or serving files securely.

SSH Integration

Built on top of Go's crypto/ssh package, ensuring secure connections and seamless integration with existing SSH infrastructure, as highlighted in the project description.

Go Idiomatic Design

Offers a clean, idiomatic Go implementation specifically for the Go ecosystem, making it a natural fit for developers building Go applications with SFTP needs.

Cons

Code Duplication Issues

The README's roadmap admits 'There is way too much duplication in the Client methods,' which could impact code maintainability and future development.

Sparse Inline Documentation

Examples and usage are referenced externally to pkg.go.dev, lacking comprehensive built-in documentation that might slow down initial adoption or debugging.

Limited Advanced Features

Focuses on core SFTP operations without built-in support for features like batch transfers, resumable uploads, or protocol extensions, requiring additional implementation effort.

Frequently Asked Questions

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