Deno middleware to add payload to request

Question

I'm trying to create a middleware in Deno using oak, I want to validate a jwt token and then if everything is OK add the payload to the request body.

Found this code:

import { validateJwt } from "https://deno.land/x/djwt/validate.ts"
import { key } from "../utils/jwt.js";

export const validate = async ({request, cookies}, next) => {
    const token = await cookies.get("token");
    const result = await validateJwt(token, key, { isThrowing: false });
    if(result) {
        request.auth = true;
        request.username = result.payload.username;
    }
    await next();
}

but is not working any more and haven't been able to find anything about how to add properties to the request.

What I want to achieve at the end is to access the payload inside the controller.

Thanks in advance. Any guidance will be much appreciated

the code above is outdated and based on an early version of djwt. My answer [here](https://stackoverflow.com/questions/64494966/jwt-authentication-with-deno/64496661#64496661) is up to date and shows how to sign and verify a JWT in Deno. — jps, Apr 08 '21 at 07:55
thanks for the answer, I have the jwt verification sorted. Mine is a OAK question, I want to pass the jwt payload to the request using a middleware — Adrian Sanchez, Apr 08 '21 at 16:24

score 0 · Accepted Answer · answered Apr 09 '21 at 03:04

Took a while but found how to do it. To pass a variable from a middleware to the route or another middleware you don't use the Request anymore but instead you use the context State

app.use(async (ctx, next) => {
  // do whatever checks to determine the user ID
  ctx.state.userId = userId;
  await next();
  delete ctx.state.userId; // cleanup
});

app.use(async (ctx, next) => {
  // now the state.userId will be set for the rest of the middleware
  ctx.state.userId;
  await next();
});

Deno middleware to add payload to request

1 Answers1