up! ⚡

⚡ Simple file uploading service written in go!

Usage

• Download binary from releases / build yourself using the go compiler.
• Run the binary, and define an AUTH envioronment variable, like so:

AUTH="user:pass" ./up
# or
AUTH="user:pass" go run .

• Use ShareX, cURL or any other client

curl -F '[email protected]' -u "user:pass" up.simo.sh

How it works

1. The user makes a POST request to server with both their file and Basic Auth headers containing the username and password

2. The server checks if the username and password match the ones in the AUTH environment variable

3. The server does extra validation on the file

   • is it <= 512 MiB?
   • does it exist already? (calculates the SHA256 hash of the file and gets the k/v pair from etcd-io/bbolt)
     • if yes, check the date of upload
       • if it's been 95% of its calculated lifespan, reupload
       • otherwise, return the link

4. Upload the file in the files/ directory, as well as add a randomly generated filename + SHA256 hash in etcd-io/bbolt, like so:

   sha256 hash of file -> filename
   # or
   d144c320286f5a2e20573aaa1193786e2b369d7ea26bea42583771a4b0236029 -> XVlBzgbaiC

5. Return the URL of the file

6. Every 24 hours, the server calculates the lifespan of every file uploaded using the formula and deletes any files that exceed that:

   # shoutout to 0x0.st
   retention = min_age + (-max_age + min_age) * pow((file_size / max_size - 1), 3)

TODO

• Basic Auth
• Automatic deletion after N amount of days (size dependent)
• SHA256 hash to check for duplicates
• Reupload if the file is going to be deleted soon
• Dockerfile for "easy" daemonizing (super overkill, especially considering the portability of go, but it's the only thing I know /shrug - better option is simply to use systemd)
• Refactor with structs?
• Tests lol
• URL shortener