Created
February 5, 2019 23:58
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// async_scrape.js (tested with node 11.3) | |
const sleep = ts => new Promise(resolve => setTimeout(resolve, ts * 1000)); | |
async function fetchUrl(url) { | |
console.log(`~ executing fetchUrl(${url})`); | |
console.time(`fetchUrl(${url})`); | |
await sleep(1 + Math.random() * 4); | |
console.timeEnd(`fetchUrl(${url})`); | |
return `<em>fake</em> page html for ${url}`; | |
} | |
async function analyzeSentiment(html) { | |
console.log(`~ analyzeSentiment("${html}")`); | |
console.time(`analyzeSentiment("${html}")`); | |
await sleep(1 + Math.random() * 4); | |
const r = { | |
positive: Math.random() | |
} | |
console.timeEnd(`analyzeSentiment("${html}")`); | |
return r; | |
} | |
// ... |
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