kristiankauffeld Posts - Answer Overflow

kristiankauffeld

•Created by kristiankauffeld on 12/27/2023 in #workers-help

Fetch Request Returns 'Undefined' during File Upload Polling Process"

I am experiencing an issue with my Cloudflare Worker that is part of a file upload process using the UploadThing library. The worker is responsible for polling the upload status from an external server (https://uploadthing.com/api/pollUpload/...). However, I'm encountering a problem where the polling doesn't happen and the fetch request within the worker therefore does not return a response, resulting in an 'undefined' value. Below is a summary of the process and where the issue occurs: 1. A POST request is initiated to http://localhost:3000/api/uploadthing?actionType=upload&slug=videoAndImage. 2. This triggers the buildRequestHandler function within UploadThing, which parses the request and forwards it to https://uploadthing.com/api/prepareUpload. 3. Upon receiving a successful response from UploadThing, the conditionalDevServer function called in buildRequestHandler initiates a polling process using pollForFileData. 4. pollForFileData, wrapped with withExponentialBackoff, makes a fetch request to https://uploadthing.com/api/pollUpload/... to check the upload status. 5. The fetch request is configured with the necessary headers, including an API key and SDK version. 6. However, the polling doesn't happen, and the fetch request does not return any response, resulting in 'undefined'. I have attached a video demonstrating the issue, where I step through the execution using a debugger. Additionally, here is the link to a pull request (PR) that is currently being worked on in the UploadThing repository: https://github.com/pingdotgg/uploadthing/pull/514/commits This PR contains relevant code changes that might provide further insights into the issue. I am looking for insights into why the polling doesn't return a response. Any suggestions on troubleshooting steps, potential causes, or configuration changes that could resolve this issue would be greatly appreciated. Thank you in advance for your help

2 replies

CDCloudflare Developers

•Created by kristiankauffeld on 12/19/2023 in #workers-help

Your worker created multiple branches of a single stream (for instance, by calling response.clone()

I am getting this when trying to use a cloudflare worker together with the uploadthing library. I have debugged in VS-code and the error is thrown here when uploadthing library calls the safeParseJSON function: https://github.com/pingdotgg/uploadthing/blob/ea0f3c96f5db2fa945592d5efc06bf84811c5525/packages/shared/src/utils.ts#L233 Here is link to my cloudflare worker: https://github.com/kristiankauffeld/uploadthing-cf-worker

5 replies

CDCloudflare Developers

•Created by kristiankauffeld on 12/7/2023 in #workers-help

ReferenceError process is not defined

I am trying to use UploadThing together with a Cloudflare Worker and tiny-request-router. Currently when I send a POST request with a png file attached via Insomnia to my "api/uploadthing" endpoint, I receive the following error "ReferenceError process is not defined". Here is what my "index.ts file looks like:

import { Env, Handler } from './types';
import { Method, Router } from 'tiny-request-router';
import { uploadRouter } from './uploadthing';
import { createServerHandler } from 'uploadthing/server';
import * as process from 'node:process';

const { GET, POST } = createServerHandler({
    router: uploadRouter,
});

const router = new Router<Handler>();

router.post('/api/uploadthing', async (req, env) => POST(req));
router.get('/api/uploadthing', async (req) => GET(req));

const worker: ExportedHandler<Env> = {
    async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
        process.env.UPLOADTHING_SECRET ??= env.UPLOADTHING_SECRET;
        process.env.UPLOADTHING_APP_ID ??= env.UPLOADTHING_APP_ID;

        const url = new URL(request.url);
        const match = router.match(request.method as Method, url.pathname);

        if (!match) return new Response('Not found', { status: 404 });

        return match.handler(request, env);
    },
};

export default worker;

import { Env, Handler } from './types';
import { Method, Router } from 'tiny-request-router';
import { uploadRouter } from './uploadthing';
import { createServerHandler } from 'uploadthing/server';
import * as process from 'node:process';

const { GET, POST } = createServerHandler({
    router: uploadRouter,
});

const router = new Router<Handler>();

router.post('/api/uploadthing', async (req, env) => POST(req));
router.get('/api/uploadthing', async (req) => GET(req));

const worker: ExportedHandler<Env> = {
    async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
        process.env.UPLOADTHING_SECRET ??= env.UPLOADTHING_SECRET;
        process.env.UPLOADTHING_APP_ID ??= env.UPLOADTHING_APP_ID;

        const url = new URL(request.url);
        const match = router.match(request.method as Method, url.pathname);

        if (!match) return new Response('Not found', { status: 404 });

        return match.handler(request, env);
    },
};

export default worker;

Here is what my "wrangler.toml" file looks like:

name = "backend"
main = "src/index.ts"
compatibility_date = "2023-11-21"
compatibility_flags = [ "nodejs_compat" ]


[vars]
API_HOST = "example.com"
API_ACCOUNT_ID = "example_user"
SERVICE_X_DATA = { URL = "service-x-api.dev.example", MY_ID = 123 }

name = "backend"
main = "src/index.ts"
compatibility_date = "2023-11-21"
compatibility_flags = [ "nodejs_compat" ]


[vars]
API_HOST = "example.com"
API_ACCOUNT_ID = "example_user"
SERVICE_X_DATA = { URL = "service-x-api.dev.example", MY_ID = 123 }

And this is my "types.ts" file:

export interface Env {
    UPLOADTHING_SECRET: string;
    UPLOADTHING_APP_ID: string;
}

export type Handler = (request: Request, env: Env) => Response | Promise<Response>;

export interface Env {
    UPLOADTHING_SECRET: string;
    UPLOADTHING_APP_ID: string;
}

export type Handler = (request: Request, env: Env) => Response | Promise<Response>;

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