example-netlify-serverless.function.ts

example-netlify-serverless.function.ts

import { Handler, HandlerContext, HandlerEvent } from '@netlify/functions';
import fetch from 'node-fetch';
import { client } from '../functions-utils/redis-client';
import { headers } from 'functions-utils/cors';

function getData(): Promise<any> {
  return fetch(
    'https://apiurl.com/data.json'
  ).then((res) => res.json());
}

const handler: Handler = async (
  event: HandlerEvent,
) => {
  try {
    if (event.httpMethod === 'OPTIONS') {
      return { statusCode: 200, headers, body: 'Ok' };
    }

    if (event.httpMethod !== 'PUT') {
      return {
        statusCode: 405,
        headers,
        body: JSON.stringify({ message: 'Method Not Allowed' }),
      };
    }

    const allCountries = await getData();
    const data = await client.set('countries', allCountries);


    return {
      statusCode: 200,
      headers,
      body: JSON.stringify({
        message: 'All countries data',
        data: JSON.parse(allCountries ?? '{}'),
      }),
    };
  } catch (err) {
    console.log('Error:', err);

    return {
      statusCode: 400,
      headers,
      body: JSON.stringify({ message: 'Error', err }),
    };
  }
};

export { handler };