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Mounting oidc-provider

The following snippets show how a Provider instance can be mounted to existing applications with a path prefix /oidc.

to a `fastify` application

// assumes fastify ^4.0.0
const fastify = new Fastify();
await fastify.register(require("@fastify/middie"));
// or
// await app.register(require('@fastify/express'));
fastify.use("/oidc", provider.callback());

to a `hapi` application

// assumes @hapi/hapi ^21.0.0
const callback = provider.callback();
hapiApp.route({
  path: `/oidc/{any*}`,
  method: "*",
  config: { payload: { output: "stream", parse: false } },
  async handler({ raw: { req, res } }, h) {
    req.originalUrl = req.url;
    req.url = req.url.replace("/oidc", "");

    callback(req, res);
    await once(res, "finish");

    req.url = req.url.replace("/", "/oidc");
    delete req.originalUrl;

    return res.writableEnded ? h.abandon : h.continue;
  },
});

to a `nest` application

// assumes NestJS ^7.0.0
import { Controller, All, Req, Res } from "@nestjs/common";
import { Request, Response } from "express";
const callback = provider.callback();
@Controller("oidc")
export class OidcController {
  @All("/*")
  public mountedOidc(@Req() req: Request, @Res() res: Response): void {
    req.url = req.originalUrl.replace("/oidc", "");
    return callback(req, res);
  }
}

to an `express` application

// assumes express ^4.0.0 || ^5.0.0
expressApp.use("/oidc", provider.callback());

to a `koa` application

// assumes koa ^2.0.0 || ^3.0.0
// assumes koa-mount ^4.0.0
import mount from "koa-mount";
koaApp.use(mount("/oidc", provider));