Cloudflare DevelopersCD
Cloudflare Developers•10mo ago
decryptedchaos

Is it possible to run a REST API with a worker?

I've been trying to build a fairly basic API on a worker using the Hono framework.

But I've been hitting wall after wall, mostly with the fact that workers (wrangler) do not work with standard node env variables. I've read the documentation on worker Environment Variables at least 10 time.. but for whatever reason the context of my app design just wont play nice with this way of passing envars

Here's My entry point 

import { Hono } from "hono";
import { logger } from "hono/logger";
import { prettyJSON } from "hono/pretty-json";
import { cors } from "hono/cors";
//
import connectDB from "./config/db";
import { Users } from "./routes";
import { errorHandler, notFound } from "./middlewares";

// Initialize the Hono app
const app = new Hono().basePath("/api/v1");


// Config MongoDB
connectDB();

// Initialize middlewares
app.use("*", logger(), prettyJSON());

// Cors
app.use(
  "*",
  cors({
    origin: "*",
    allowMethods: ["GET", "POST", "PUT", "DELETE", "OPTIONS"],
  })
);

// Home Route
app.get("/", (c) => c.text("Welcome to the API!"));

// User Routes
app.route("/users", Users);

// Error Handler
app.onError((err, c) => {
  const error = errorHandler(c);
  return error;
});

// Not Found Handler
app.notFound((c) => {
  const error = notFound(c);
  return error;
});

const port = 8000;

export default {
  port,
  fetch: app.fetch,
};


And here's a module that handles connecting to the database 

import * as mongoose from 'mongoose'

const connectDB = async () => {
  try {
    if (MONGO_URI !== undefined) {
    //I've tried to do vars several ways as follows
    // Appears to be valid code in the sense that resolves to my string
      const conn = await mongoose.connect(MONGO_URI, {
    //IIRC this complains that $ is undefied
      const conn = await mongoose.connect(${env.MONGO_URI}, {
    //This throws an error that env is undefied, and no mwater what i've tried in the entry i can't get it to pass
     const conn = await mongoose.connect(`${env.MONGO_URI}`, {
        autoIndex: true,
      })

      console.log(`MongoDB Connected: ${conn.connection.host}`)
      console.log(MONGO_URI)
    }
  } catch (err: any) {
    console.error(`Error: ${err.message}`)
    process.exit(1)
  }
}

export default connectDB


Am i just chasing my tail for no reason here? is this something explicitly disabled or prevented on workers? Am i misunderstanding the usecase? would this be better suited on pages? or is this just not something CF intends us to use at all?
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