sharex-backend

My private and very much over engineered, 100% serverless and (almost) completely free ShareX image sharing backend.

Structure

The backend consists of Vercel serverless functions written in Rust (see handler crate) to authenticate and upload, retrieve, list and manage images. The authentication is done via the OpenID Connect flow. In this case, Auth0 is used as authentication server and identity provider. Images are stored in a S3 bucket on Contabo and persistent information like user-to-image links are stored in a Postgres database, in this case hosted on Supabase. To reduce load on the GET i.zekro.de/:image_id endpoint, CloudFront is used as proxy cache in front of Vercel functions.

flowchart TD
    ApiEntryPoint([api.i.zekro.de])
    ImageEntryPoint([i.zekro.de])
    Cache[CloudFront]
    Functions[Vercel Functions]
    DB[Supabase PG]
    S3[Contabo S3]

    ImageEntryPoint <-->  Cache
    ApiEntryPoint   <---> Functions
    Cache           <-->  Functions
    Functions       <-->  DB
    Functions       <-->  S3

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Motivation

This project is primarily created to learn more about serverless software architecture - especially with Rust, authentication via OAuth2 and OpenID Connect and proxy caching via AWS Cloudfront.

Todo

Because this project is currently WIP, some features are still missing but planned.

Authentication

• Login via OAuth2 + OpenID Connect
• Authentication in serverless fucntions
• Creating API tokens for authentication
• Using API tokens for authentication

Images

• Upload images
• Retrieve images
• List users images
• Delete images

Web UI

• Web UI to list, view and manage images