Is it possible to fetch localhost api from edge function?

[jrpersico]

Do you know if it's possible to fetch localhost from an edge function?

I'm trying to fetch an api (fastapi) that runs locally from a function.
Even if supabase start & supabase functions serve run with corsHeaders I get a cors error...

import { corsHeaders } from "../_shared/cors.ts";

Deno.serve(async (req) => {
  if (req.method === "OPTIONS") {
    return new Response("ok", { headers: corsHeaders });
  }

  const res = await fetch(`http://127.0.0.1:8000/search/NY`, {
    headers: { ...corsHeaders, "Content-Type": "application/json" },
  });
  if (res.ok) {
    const { city, country } = await res.json();

    return new Response(JSON.stringify(`You're accessing toto`), {
      headers: { ...corsHeaders, "Content-Type": "application/json" },
    });
  } else {
    return new Response(await res.text(), {
      headers: { ...corsHeaders, "Content-Type": "application/json" },
      status: 400,
    });
  }
});



```[Error] TypeError: error sending request for url (http://127.0.0.1:8000/search): error trying to connect: tcp connect error: Connection refused (os error 111)

[BinaryShrub]

I'm having the same issue, did you come up with a solution? #32943

[jrpersico]

Yes! You can use http://host.docker.internal:8000/ as localhost path

[BinaryShrub]

I actually discovered we should be using the ENV var in the docs. It seems it works both locally and deployed as long as you're trying to access the same supabase project

…

On Mon, Jan 20, 2025, 10:53 PM Jean-Romain Persico ***@***.***> wrote: Yes! You can use http://host.docker.internal:8000/ as localhost path — Reply to this email directly, view it on GitHub <#21525 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACRSHLIIJMKRMPRUQ7RQXWL2LXVGVAVCNFSM6AAAAABVRSI776VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTCOBZHA3DIMI> . You are receiving this because you commented.Message ID: ***@***.***>