sfup

sfup - transfer service for commandline usage

v0.1.0

Imagine to have two headless servers, and needing to transfer a file between them. But the servers cannot connect to each other. And of course, being on the commandline, you can't use WeTransfer, Dropbox, ecc...

Enter sfup. It's a simple storage server/transfer service that can be used with cUrl. Install it:

• You set it up with a public endpoint (I use docker+cloudflare tunnels);
• You supply a whitelist of allowed e-mails and a SMTP server to send emails (e.g. GMail).

Then, when you need to transfer a file:

• From a browser, visit http://sfup.example.com/reserve/<your_email_address>;
• If the address is authorized, you'll receive an email with a one-time shell command to upload a file (using cURL);
• Execute the command on server A, upload the file, and the operation will output:
  • A link for downloading with a browser;
  • A command to download from CLI with cURL;
• On server B, execute the command and download the file;
• The file is then deleted from sfup.

Note

When the file is downloaded, an integrity check is performed. If it fails, the file is downloaded but the call will return 599 as a status code. Depending on your setup, this may be difficult to catch; for example, cURL will print:

curl: (22) The requested URL returned error: 599

Install

Simple install, with docker:

docker run --name sfup -p 8080:8080 -v sfup:/data -v config.yaml:/config.yaml germanorizzo/sfup:latest

For the config.yaml file, see and adapt config.yaml.template in this repository.

Features

• One-time everything: files are stored up to the first (and only) download
• E2e encryption, the key is in the download link
• Integrity check
• Expiration of reservations and files
• Configuration to set the maximum file size
• Single binary written in Go
• Very compact codebase

Issues

• Upload command doesn't show progress
• Download command doesn't display errors

Next Steps

It's pretty basic for now. Future plans:

• Better Windows compatibility
• Quotas