PixivFE/doc/dev/framework-migration.md

Migrating from gofiber to net/http -- the plan

• Config [already decoupled]
• Templating [decoupled, waiting for integration]
• Router features
  • /users/:id/:category? (optional path segment)
  • /i.pximg.net/* (wildcard)
• Middleware
  • Logging
  • Rate limit (optional, could be loosely-coupled)
  • Caching (optional, could be loosely-coupled)

Problem

net/http handlers don't return errors. We have to make our own ServeMux that allows functions to return error, possibly.

net/http expects handlers to panic on error, while we don't panic. We need to log the errors anyway.

Idea: we create a compat layer of {w, r} that has the same API as *fiber.Ctx.

Tips

To access /:abc, use r.PathValue("abc").

Want to associate arbitrary value with a request? Use r.Context.Value().