Promise.allSettled returns 完成

Question

我正在使用函数 batchRequest 发出 https 请求，该函数使用 Promise.allSettled 分批收集承诺并将它们发送到 apiRequest 函数，该函数使用 axios 进行实际调用。

在 batchRequest 函数中，我向 HTTP 请求函数发送了一个 url 数组并等待结果。然后我使用 Promise.allSettled status 来识别 rejected 的。但是当 apiRequest 捕获为错误时 Promise.allSettled 将其视为 status: fullfilled

async function batchRequest(data, index) {
  console.log(`Running... ${index} round`)
  while (data.length) {

    // Batched request according to concurrent setting
    const batch = data
      .splice(0, settings.concurrent)
      .map((url) => apiRequest(url, index))

    const results = await Promise.allSettled(batch)

    results.forEach(({ status, value, reason }) => {
      if (status === 'fulfilled') {
        console.log(value) // I get both the try and catch here from `apiRequest`
      }
      if (status === 'rejected') {
        console.log(reason)
        // I never get anything here
      }
    })
  }
}

Api请求函数

async function apiRequest(url, index) {
  try {
    const { data } = await axios('https://api-end-point')
    return 'All good' + url
  } catch (error) {
    const status = error.response?.status ?? 'No response'
    return  `Error: ${status}, ${url}`
  }
}

Answer 1

不要return错误。扔了！

async function apiRequest(url, index) {
  try {
    const { data } = await axios('https://api-end-point')
    return 'All good' + url
  } catch (error) {
    const status = error.response?.status ?? 'No response'
    throw  `Error: ${status}, ${url}` // <------------change here
  }
}

Promise.allSettled returns 完成

Promise.allSettled returns catch as fullfilled

javascript

node.js

es6-promise