Aggregate Requests

Aggregate Requests

Sends two GET request to two urls and aggregates the responses into one response.

Copy into a Worker script:
async function handleRequest(request) { const init = { headers: { 'content-type': type, }, } const responses = await Promise.all([fetch(url1, init), fetch(url2, init)]) const results = await Promise.all([gatherResponse(responses[0]), gatherResponse(responses[1])]) return new Response(results, init) } addEventListener('fetch', event => { return event.respondWith(handleRequest(event.request)) }) /** * gatherResponse awaits and returns a response body as a string. * Use await gatherResponse(..) in an async function to get the response body * @param {Response} response */ async function gatherResponse(response) { const { headers } = response const contentType = headers.get('content-type') if (contentType.includes('application/json')) { return await response.json() } else if (contentType.includes('application/text')) { return await response.text() } else if (contentType.includes('text/html')) { return await response.text() } else { return await response.text() } } /** * Example someHost is set up to return JSON responses * Replace url1 and url2 with the hosts you wish to * send requests to * @param {string} url the URL to send the request to */ const someHost = 'https://workers-tooling.cf/demos' const url1 = someHost + '/requests/json' const url2 = someHost + '/requests/json' const type = 'application/json;charset=UTF-8'