haskell-servant/servant

Dynamic routing

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#634 opened on Nov 7, 2016

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 (17 comments) (0 reactions) (0 assignees)Haskell (1,953 stars) (422 forks)batch import
enhancementhelp wanted

Description

Is there a way (currently) to build a dynamic route at runtime out of static routes? I'm imagining a simple use case where you want to serve the same API with different URL roots, say /production/api/... and /test/api. You could parameterize your server on top-level path and server the API from there. But I can't think of a way to dynamically build a route.

Contributor guide

Tech stack
None
Domain
api
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Knowledge of Servant libraryHaskell type level programming
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25
Research direction
Explore the servant repository, particularly the Servant.Server module and the TypeLits extensions in Haskell. Check the issue comments for any proposed solutions or workarounds. Consider if a type level or value level approach is feasible for dynamic route composition.