Nuxt3 broke readBody in cloudflare worker context, this is a hotfix for that issue.

cloudflare.utis.js

// This file wraps readBody that broke on cloudflare workers since nuxt 3.0.0
// Adding this here to parse UIntArray if it comes as part of the response via cloudflare.
// This is a modified version of the code from https://gist.github.com/jonleighton/958841#gistcomment-1598302

import { readRawBody, readBody } from "h3";

export async function readBodyCF(event){
  let body
  if (event.node.req.body instanceof Uint8Array) {
    const rawBody = await readRawBody(event);
    body = JSON.parse(Utf8ArrayToStr(rawBody));
  } else {
    body = await readBody(event);
  }
  return body
}

export function Utf8ArrayToStr(array) {
    var out, i, len, c;
    var char2, char3;

    out = "";
    len = array.length;
    i = 0;
    while(i < len) {
    c = array[i++];
    switch(c >> 4)
    { 
      case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
        // 0xxxxxxx
        out += String.fromCharCode(c);
        break;
      case 12: case 13:
        // 110x xxxx   10xx xxxx
        char2 = array[i++];
        out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
        break;
      case 14:
        // 1110 xxxx  10xx xxxx  10xx xxxx
        char2 = array[i++];
        char3 = array[i++];
        out += String.fromCharCode(((c & 0x0F) << 12) |
                       ((char2 & 0x3F) << 6) |
                       ((char3 & 0x3F) << 0));
        break;
    }
    }

    return out;
}