Cloudflare Functions, basically.

Isaac McFadyenOP•5/28/22, 10:18 PM

Or Cloudflare Pages but Pages didn't use to be dynamic so you'll get results for static sites mostly.

Chaika•5/28/22, 10:20 PM

or depending on what you're looking for, searching for cloudflare workers solutions (i.e "how to post a tweet using cloudflare workers"), and in most cases you can port the code over to functions. Probably would find a lot more code examples/etc that use CF Workers right now

IIsaac McFadyen Cloudflare Functions, basically.

sumit•5/29/22, 3:28 PM

Thanks, no equivalent outside CF ecosystem?

sumit•5/29/22, 3:29 PM

btw, is this code ok?

// Reacts to POST /api/hello
export async function onRequest(request) {
  // ...

  const body = { "products" : [
    { "Name": "Cheese", "Location": "Refrigerated foods"},
    { "Name": "Crisps", "Location": "the Snack isle"},
    { "Name": "Pizza", "Location": "Refrigerated foods"},
  ]}
  
  const headers = {
    'Access-Control-Allow-Origin': '*',
    'Content-type': 'application/json',
  };
  return new Response(body, { headers });
};

// Reacts to POST /api/hello
export async function onRequest(request) {
  // ...

  const body = { "products" : [
    { "Name": "Cheese", "Location": "Refrigerated foods"},
    { "Name": "Crisps", "Location": "the Snack isle"},
    { "Name": "Pizza", "Location": "Refrigerated foods"},
  ]}
  
  const headers = {
    'Access-Control-Allow-Origin': '*',
    'Content-type': 'application/json',
  };
  return new Response(body, { headers });
};

James•5/29/22, 3:38 PM

You'll want to

JSON.stringify

JSON.stringify

the

body

body

, but otherwise yes

JJames You'll want to `JSON.stringify` the `body`, but otherwise yes 🙂

sumit•5/29/22, 3:43 PM

Thanks, while sending (in this code) or while receiving?

Isaac McFadyenOP•5/29/22, 3:44 PM

Sending.

sumit•5/29/22, 3:44 PM

cool

Isaac McFadyenOP•5/29/22, 3:44 PM

You can't directly put an Object body into a response, you'll need to

JSON.stringify(body)

JSON.stringify(body)

sumit•5/29/22, 3:44 PM

so the new body will be this?
body = JSON.stringify(body)

Isaac McFadyenOP•5/29/22, 3:48 PM

Yup.

IIsaac McFadyen Yup.

sumit•5/29/22, 3:48 PM

also, what is the widest possible class of this code that I can google so that I can find reusable code?

JS functions? Node.js functions? What should give me reusable code while also ensuring max possible userbase?

sumit•5/29/22, 3:50 PM

i feel really awkward asking everything on this channel even though y'all are really nice

GregBrimble•5/29/22, 3:51 PM

“Pure JS” for the general day-to-day is usually what I search for. Or “web API” if I’m needing something specific about how to access request/response sort of stuff.

GregBrimble•5/29/22, 3:52 PM

The MDN docs are brilliant

sumit•5/29/22, 3:52 PM

yeah MDN is the MVP

Ssumit btw, is this code ok? `// Reacts to POST /api/hello export async function onReq...

sumit•5/29/22, 3:53 PM

so how would you have googled my previous question, for example?

Isaac McFadyenOP•5/29/22, 3:53 PM

Even some Node.JS stuff will work, as long as it doesn't import any node-js specific packages.

IIsaac McFadyen Even some Node.JS stuff will *work*, as long as it doesn't import any node-js sp...

sumit•5/29/22, 3:53 PM

yeah pure js then i guess

Ssumit so how would you have googled my previous question, for example?

Isaac McFadyenOP•5/29/22, 3:53 PM

I would have done "return object in javascript response"

IIsaac McFadyen I would have done "return object in javascript response"

sumit•5/29/22, 3:53 PM

oh cool

Isaac McFadyenOP•5/29/22, 3:53 PM

an Object is what the

{key: value}

{key: value}

structure is called in JS.

sumit•5/29/22, 3:53 PM

cool

sumit•5/29/22, 3:53 PM

thanks

Ssumit btw, is this code ok? `// Reacts to POST /api/hello export async function onReq...

sumit•5/29/22, 4:00 PM

so if I want to get back my json on client side, what would you change in this code?

async function fetchProductsAsJSON() {
    const response = await fetch('https://mydomain.com/api/hello');
    // waits until the request completes...
    console.log(response);
  }

  fetchProductsAsJSON();

async function fetchProductsAsJSON() {
    const response = await fetch('https://mydomain.com/api/hello');
    // waits until the request completes...
    console.log(response);
  }

  fetchProductsAsJSON();

kian•5/29/22, 4:03 PM

const json = await response.json()

const json = await response.json()

kian•5/29/22, 4:03 PM

https://developer.mozilla.org/en-US/docs/Web/API/Response/json

Kkian `const json = await response.json()`

sumit•5/29/22, 4:05 PM

thanks and how would you have googled this if you were me?

kian•5/29/22, 4:06 PM

mdn response json

mdn response json

mdn fetch

mdn fetch

will both have it

Kkian `mdn response json` or `mdn fetch` will both have it

sumit•5/29/22, 4:06 PM

cool, thanks

kian•5/29/22, 4:06 PM

although in the context of code running in Workers or Functions, it's not 1:1 the fetch you'll see on MDN

kian•5/29/22, 4:06 PM

so there's https://developers.cloudflare.com/workers/runtime-apis/fetch/

Fetch · Cloudflare Workers docs

Documentation for Cloudflare Workers, a serverless execution environment that allows you to create entirely new applications or augment existing ones without configuring or maintaining infrastructure.

kian•5/29/22, 4:07 PM

it's like 90% the same but there's a few bits here and there that aren't in Workers

sumit•5/29/22, 4:07 PM

is there a porting guide?

kian•5/29/22, 4:07 PM

it's mostly a few things from the

init

init

on here https://developer.mozilla.org/en-US/docs/Web/API/fetch

fetch() - Web APIs | MDN

The global fetch() method starts the process of fetching a
resource from the network, returning a promise which is fulfilled once the response is
available.

kian•5/29/22, 4:08 PM

there's no mode/credentials/etc on Workers

Kkian there's no mode/credentials/etc on Workers

sumit•5/29/22, 4:08 PM

then how auth headers get sent?

kian•5/29/22, 4:09 PM

same as any other header

sumit•5/29/22, 4:09 PM

oh cool

kian•5/29/22, 4:09 PM

fetch(url, {
  headers: {
    'foo': 'bar'
  }
}

fetch(url, {
  headers: {
    'foo': 'bar'
  }
}

sumit•5/29/22, 4:10 PM

thanks

sumit•5/29/22, 4:17 PM

i can access environment vars in functions code, right?

sumit•5/29/22, 4:18 PM

(without leaking them, i hope)

Ssumit i can access environment vars in functions code, right?

Isaac McFadyenOP•5/29/22, 4:24 PM

Yup, it'll be on

context.env.VARIABLE_NAME

context.env.VARIABLE_NAME

IIsaac McFadyen Yup, it'll be on `context.env.VARIABLE_NAME`

sumit•5/29/22, 4:36 PM

thanks

benank•5/29/22, 7:19 PM

I'm using sveltekit with functions (with adapter-auto so sveltekit endpoints are the functions now), but I am having trouble accessing env vars when testing locally. I am using wrangler:

wrangler pages dev --port 8788 --proxy 3000 --binding $(cat .env) -- svelte-kit dev

wrangler pages dev --port 8788 --proxy 3000 --binding $(cat .env) -- svelte-kit dev

However,

platform

platform

is always undefined in the endpoints. How can I fix this so I can access

platform.env

platform.env

while testing locally with wrangler2?

The code works fine in production when deployed to cloudflare. On the guide for setting it up, it says to use wrangler to test it locally, but

platform

platform

is always undefined: https://github.com/sveltejs/kit/tree/master/packages/adapter-cloudflare#environment-variables

James•5/29/22, 9:43 PM

Call

next()

next()

instead

James•5/29/22, 9:44 PM

context.next()

context.next()

in your example

// Reacts to POST /api/hello export async function onRequest(request) { // ... const body = { "products" : [ { "Name": "Cheese", "Location": "Refrigerated foods"}, { "Name": "Crisps", "Location": "the Snack isle"}, { "Name": "Pizza", "Location": "Refrigerated foods"}, ]} const headers = { 'Access-Control-Allow-Origin': '*', 'Content-type': 'application/json', }; return new Response(body, { headers }); };

async function fetchProductsAsJSON() { const response = await fetch('https://mydomain.com/api/hello'); // waits until the request completes... console.log(response); } fetchProductsAsJSON();

Cloudflare Functions, basically.

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