would a rewrite middleware that only keeps certain params be enough then? - Cloudflare Developers

© 2026 Hedgehog Software, LLC

More

Communities Docs About Terms Privacy

Mozzy

M

MozzyOP•10/31/24, 9:41 PM

Never done rewrites, so not sure it works

Isaac McFadyen

I

Isaac McFadyen•10/31/24, 9:42 PM

I believe that would work? Always hard to know because different kinds of Rules run in different orders and there's no real reference that I've seen

Isaac McFadyen

IIsaac McFadyen I believe that would work? Always hard to know because different kinds of Rules ...

Chaika

C

Chaika•10/31/24, 9:43 PM

https://developers.cloudflare.com/ruleset-engine/reference/phases-list/#request-phases

Cloudflare Docs

Phases list | Cloudflare Ruleset Engine docs

The following tables list the phases of Cloudflare products powered by the Ruleset Engine, in the order those phases are executed. Some products such as the Cloudflare Web Application Firewall have more than one associated phase.

Chaika

CChaika https://developers.cloudflare.com/ruleset-engine/reference/phases-list/#request-...

Isaac McFadyen

I

Isaac McFadyen•10/31/24, 9:44 PM

Ah TY

Chaika

C

Chaika•10/31/24, 9:44 PM

actual cache runs at the very end though, if the question is "can I use rules to modify what normal cache uses" pretty sure all of them work, transform headers at least def does

Flux

F

Flux•10/31/24, 10:17 PM

Wondering if anyone knows any ways to turn a PDF to a PNG/Image with workers. Is this even possible considering the v8 isolate constraints? (worst case setup lambda but dont want to)

Chaika

CChaika Then you have to use CF For SaaS, which doesn't support wildcards full stop for ...

elpupper

E

elpupper•10/31/24, 10:24 PM

ok so I'm doing some research and I dont think i get it. is CF for SaaS basically nginx? I cant use workers/worker routes here? Do I have to get my own server that cloudflare can point to?

Mozzy

MMozzy would a rewrite middleware that only keeps certain params be enough then?

Mozzy

M

MozzyOP•10/31/24, 10:44 PM

This seems to do the trick, however cursed it is

export const stripUnusedSearchParams = createMiddleware<{ Bindings: CloudflareBindings }>(async (c, next) => {
  const url = new URL(c.req.url);
  let foundInvalidSearchParams = false;

  for (const key of url.searchParams.keys()) {
    if (!validSearchParams.includes(key)) {
      url.searchParams.delete(key);
      foundInvalidSearchParams = true;
    }
  }

  if (foundInvalidSearchParams) {
    return c.redirect(url.searchParams.size ? `${url.pathname}?${url.searchParams}` : url.pathname, 302);
  }

  await next();
});

export const stripUnusedSearchParams = createMiddleware<{ Bindings: CloudflareBindings }>(async (c, next) => {
  const url = new URL(c.req.url);
  let foundInvalidSearchParams = false;

  for (const key of url.searchParams.keys()) {
    if (!validSearchParams.includes(key)) {
      url.searchParams.delete(key);
      foundInvalidSearchParams = true;
    }
  }

  if (foundInvalidSearchParams) {
    return c.redirect(url.searchParams.size ? `${url.pathname}?${url.searchParams}` : url.pathname, 302);
  }

  await next();
});

Mozzy

M

MozzyOP•10/31/24, 11:12 PM

sadly, req.url is readonly

Elliot Hesp

E

Elliot Hesp•11/1/24, 4:48 PM

Hey, if I have a RPC Target like so

class Foo extends RpcTarget {
  async fetch(request: Request): Promise<Response> {
    return new Response('Hello!');
  }
}

class Foo extends RpcTarget {
  async fetch(request: Request): Promise<Response> {
    return new Response('Hello!');
  }
}

Is there anyway I can just return that response from my worker?

At the moment, I get a type error:

Type '{ clone: Stub<() => Response>; status: number; statusText: string; headers: { get: Stub<(name: string) => string | null>; getAll: Stub<(name: string) => string[]>; ... 9 more ...; [Symbol.iterator]: Stub<...>; }; ... 12 more ...; blob: Stub<...>; } & Disposable' is not assignable to type 'Response'.
  The types of 'clone(...).status' are incompatible between these types.
    Type 'Promise<number>' is not assignable to type 'number'.ts(2322)

Type '{ clone: Stub<() => Response>; status: number; statusText: string; headers: { get: Stub<(name: string) => string | null>; getAll: Stub<(name: string) => string[]>; ... 9 more ...; [Symbol.iterator]: Stub<...>; }; ... 12 more ...; blob: Stub<...>; } & Disposable' is not assignable to type 'Response'.
  The types of 'clone(...).status' are incompatible between these types.
    Type 'Promise<number>' is not assignable to type 'number'.ts(2322)

bkyerv

B

bkyerv•11/1/24, 6:23 PM

is firebase sdk still not supported in workers?

Cross

C

Cross•11/1/24, 9:40 PM

Hi guys, i have a quick question, if i want to implement worker for my domain abc.com, on setting worker whats you think the best practice, set a route or a subdomain?

Geert Jan Sloos

G

Geert Jan Sloos•11/1/24, 11:04 PM

Is it difficult to create an Email Worker, and check if the incoming email has an PDF?

Omar Abid

O

Omar Abid•11/2/24, 2:21 PM

worker deployment is now failing 50% of the time for me. this has been on going for the last couple days.

Omar Abid

OOmar Abid worker deployment is now failing 50% of the time for me. this has been on going ...

elpupper

E

elpupper•11/2/24, 5:05 PM

using rust?

DoggeSlapper

D

DoggeSlapper•11/2/24, 5:22 PM

I wanna create an image with workers, using a base image + some text using specific fonts, can anyone recomend a library that works well on workers?

1984 Ford Laser

1

1984 Ford Laser•11/3/24, 1:22 AM

Does the

url

url

field of the draw object need to be a URL, or can it be an image object/blob? I have a second Worker that generates images, to be used as layers in an overlay, but I need to fetch the images to get dimensions before they're drawn as the overlay
https://developers.cloudflare.com/images/transform-images/draw-overlays/

Cloudflare Docs

Draw overlays and watermarks | Cloudflare Images docs

You can draw additional images on top of a resized image, with transparency and blending effects. This enables adding of watermarks, logos, signatures, vignettes, and other effects to resized images.

elpupper

Eelpupper using rust?

Omar Abid

O

Omar Abid•11/3/24, 3:23 AM

Both rust and javascript. it happens randomly.

Original message was deleted

fry69

F

fry69•11/4/24, 6:52 AM

See -> https://developers.cloudflare.com/workers/platform/limits/#daily-request

Walshy

W

Walshy•11/4/24, 12:05 PM

Don't think this exists yet but I'm sure it's something the builds team is tracking

elpupper

E

elpupper•11/4/24, 3:50 PM

hey so whats the file limits for the static assets?

elpupper

Eelpupper hey so whats the file limits for the static assets?

fry69

F

fry69•11/4/24, 3:53 PM

Apparently those for Pages -> https://developers.cloudflare.com/pages/platform/limits/#file-size

abkux ~

Aabkux ~Hello, can I use postgresql on workers with hono?

TravisTravis

T

TravisTravis•11/4/24, 6:30 PM

I was planning to test that out also.

They have a tutorial that shows using the postgrespostgres package:

https://developers.cloudflare.com/workers/tutorials/postgres/

I assume it should work fine with hono.

Cloudflare Docs

Connect to a PostgreSQL database with Cloudflare Workers | Cloudfla...

In this tutorial, you will learn how to create a Cloudflare Workers application and connect it to a PostgreSQL database using TCP Sockets and Hyperdrive. The Workers application you create in this tutorial will interact with a product database inside of PostgreSQL.

TravisTravis

T

TravisTravis•11/4/24, 6:35 PM

On that same topic, does anyone know how the TCP connection is reused in that example?

They don't seem to be creating a connection explicitly. Is that part handled by hyperdrive?

abkux ~

Aabkux ~yes, but still anyone could help me with prisma one would be great

TravisTravis

T

TravisTravis•11/4/24, 6:58 PM

I was actually looking into that as well.

As far as I can tell it's still a preview feature:

https://www.prisma.io/docs/orm/prisma-client/deployment/edge/overview

Looks like pgpg actually is supported though.

Overview: Deploy Prisma ORM at the Edge | Prisma Documentation

Learn how to deploy your Prisma-backed apps to edge functions like Cloudflare Workers or Vercel Edge Functions

TravisTravis

T

TravisTravis•11/4/24, 7:00 PM

I don't have a link, but I also came across a GitHub issue where people were having some issues with using it on workers, so I haven't determined if it's a feasible option yet.

TravisTravis

T

TravisTravis•11/4/24, 7:04 PM

I'm considering using drizzle instead, simply because it has edge support, I'd prefer to use prisma if it works well.

Patrick

P

Patrick•11/4/24, 8:22 PM

https://episode.thebytesizedchronicle.com/Demystifying-Serverless-A-Beginners-Guide-to-Cloudflare-Workers

Demystifying Serverless - A Beginner's Guide to Cloudflare Workers

This episode explores Cloudflare Workers, a serverless environment for building and augmenting applications. We'll cover how Workers runs on Cloudflare's network in cities around the world, offering free and paid plans to suit your needs.

Jehu

J

Jehu•11/4/24, 10:16 PM

Is there a collection of cloudflare icons that can be used for diagrams somewhere(official or unofficial)?

Jehu

JJehu Is there a collection of cloudflare icons that can be used for diagrams somewher...

Cyb3r-Jak3

C

Cyb3r-Jak3•11/4/24, 10:24 PM

Unoffically there is https://cfdata.lol/icons/

Brand Icons - Cloudflare Datamining

List of Cloudflare brand icons

Marcus

M

Marcus•11/5/24, 7:57 AM

I think the answer is no, but does anyone know if encodeBody: 'manual'encodeBody: 'manual' or another technique can be used to turn off the automatic decompression of the result of a fetch request, as a corollary to the way one can turn off automatic compression of the response a worker returns? (So that one could, say, have a worker fetch from a server, store the compressed response in KV, and at some later point respond to a request with the compressed response with encodeBody: 'manual'encodeBody: 'manual'). I know you can passthrough an unmodified compressed response, but my understanding is that you can't access them directly to store them.

Marius B.

M

Marius B.•11/5/24, 11:12 AM

Is there a good guide how to use Analytics Engine to measure the bandwidth per user for a worker? I am using workers to proxy files due cors reasons. For requests, the measurement is easy, but for bandwidth I don't want to use the content-length header, because not always the whole file, e.g. a video gets proxied, if the user cuts the connection. Is TransformStream()TransformStream() the right way to measure bandwidth? Thanks in advance.

shoo

S

shoo•11/5/24, 6:43 PM

hey guys
I have added a bunch of variables through cloudflare dashboard but I am not able to access those in my code during local development.
I am using hono and I am trying to access the envs using ctx.env.ENV_NAME

and if I pass "--remote" flag - frontend throws a CORS error

any help would be appreciated

elpupper

E

elpupper•11/5/24, 7:07 PM

can websockets connections stay alive in workers?

Jin Taejin

J

Jin Taejin•11/5/24, 9:08 PM

Hey guys.

Jin Taejin

J

Jin Taejin•11/5/24, 9:09 PM

I'm trying to test a worker with service bindings using vitest for simple integration tests. Using only the basic doc config pointing to my wrangler.toml. Vitest doesn't recognize the service bindings of other workers on my account when I try to run it

Jin Taejin

J

Jin Taejin•11/5/24, 9:10 PM

Jin Taejin

J

Jin Taejin•11/5/24, 9:10 PM

Does anyone knows what I can do to make vitest aware of the bindings?

Jin Taejin

J

Jin Taejin•11/5/24, 9:11 PM

vitest.config.js is just: import { defineWorkersConfig } from "@cloudflare/vitest-pool-workers/config";

export default defineWorkersConfig({
test: {
poolOptions: {
workers: {
wrangler: { configPath: "./wrangler.toml" },
},
},
},
});

naourass

N

naourass•11/6/24, 6:03 PM

Any viable workaround to get syntax highlighting in vscode for .dev.vars.dev.vars file?

masd4

M

masd4•11/7/24, 8:56 AM

the wrangler deletewrangler deletefunctionality seems a bit dangerous.. it would be nice if I could somehow restrict an API key to only be able to delete workers that were created by that same key... otherwise it could theoretically snipe anything else

Type '{ clone: Stub<() => Response>; status: number; statusText: string; headers: { get: Stub<(name: string) => string | null>; getAll: Stub<(name: string) => string[]>; ... 9 more ...; [Symbol.iterator]: Stub<...>; }; ... 12 more ...; blob: Stub<...>; } & Disposable' is not assignable to type 'Response'.
  The types of 'clone(...).status' are incompatible between these types.
    Type 'Promise<number>' is not assignable to type 'number'.ts(2322)

Type '{ clone: Stub<() => Response>; status: number; statusText: string; headers: { get: Stub<(name: string) => string | null>; getAll: Stub<(name: string) => string[]>; ... 9 more ...; [Symbol.iterator]: Stub<...>; }; ... 12 more ...; blob: Stub<...>; } & Disposable' is not assignable to type 'Response'.
  The types of 'clone(...).status' are incompatible between these types.
    Type 'Promise<number>' is not assignable to type 'number'.ts(2322)

export const stripUnusedSearchParams = createMiddleware<{ Bindings: CloudflareBindings }>(async (c, next) => {
  const url = new URL(c.req.url);
  let foundInvalidSearchParams = false;

  for (const key of url.searchParams.keys()) {
    if (!validSearchParams.includes(key)) {
      url.searchParams.delete(key);
      foundInvalidSearchParams = true;
    }
  }

  if (foundInvalidSearchParams) {
    return c.redirect(url.searchParams.size ? `${url.pathname}?${url.searchParams}` : url.pathname, 302);
  }

  await next();
});

export const stripUnusedSearchParams = createMiddleware<{ Bindings: CloudflareBindings }>(async (c, next) => {
  const url = new URL(c.req.url);
  let foundInvalidSearchParams = false;

  for (const key of url.searchParams.keys()) {
    if (!validSearchParams.includes(key)) {
      url.searchParams.delete(key);
      foundInvalidSearchParams = true;
    }
  }

  if (foundInvalidSearchParams) {
    return c.redirect(url.searchParams.size ? `${url.pathname}?${url.searchParams}` : url.pathname, 302);
  }

  await next();
});