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Mount Express router with OpenAPI spec #2389

bajtos opened this Issue Feb 14, 2019 · 0 comments


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bajtos commented Feb 14, 2019

This is a follow-up for the spike #2318, see the discussion and PoC code for more context.

Implement app.mountExpressRouter(basePath, router, spec?) to allow LB4 app developers to add arbitrary set of Express routes and provide OpenAPI spec

  basePath: string,
  router: ExpressRequestHandler,
  spec?: RouterSpec,
): void;

The new API should build on the foundation laid down by StaticAssetsRoute and allows LB4 app
developers to add arbitrary set of Express routes and provide OpenAPI spec.

As a result, LB4 will have the following request-handling pipeline:

  1. Request-preprocessing middleware like CORS, this is not customizable yet.
  2. Native LoopBack 4 routes (controller methods or route handlers).
  3. External Express routers (if the request was not handled yet).
  4. Static assets (if the request was not handled yet).

Related issues: #1849

Acceptance criteria

  • Refactor StaticAssetsRoute into ExternalExpressRoutes and ExternalRoute, see PoC in external-express-routes.ts --> #2524
  • Add mountExpressRouter to both RestServer and RestApplication classes.
  • Update API docs
  • Describe the new API in Routes, include a simple example based on express.Router (not LB3).

@dhmlau dhmlau added this to the March 2019 milestone milestone Mar 1, 2019

@dhmlau dhmlau referenced this issue Mar 4, 2019


Monthly Milestone - March 2019 ☀️🚗💐 #2516

18 of 34 tasks complete

@bajtos bajtos self-assigned this Mar 4, 2019

@bajtos bajtos removed their assignment Mar 5, 2019

@nabdelgadir nabdelgadir referenced this issue Mar 27, 2019


feat(rest): add mountExpressRouter #2643

5 of 7 tasks complete

@dhmlau dhmlau referenced this issue Apr 1, 2019


Monthly Milestone - April 2019 🌿🐰☔️ #2669

11 of 46 tasks complete
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