Async请求重试

async-retry.js

// From: http://thecodebarbarian.com/common-async-await-design-patterns-in-node.js.html

const superagent = require('superagent');

const NUM_RETRIES = 3;

test();

async function test() {
  let i;
  for (i = 0; i < NUM_RETRIES; ++i) {
    try {
      await superagent.get('http://google.com/this-throws-an-error');
      break;
    } catch(err) {}
  }
  console.log(i); // 3
}