如何修復 UnhandledPromiseRejectionWarning：錯誤：讀取 ETIMEDOUT 和 UnhandledPromiseRejectionWarning：錯誤：寫入 EPROTO 錯誤

Question

我正在使用 axios 和cheerio 進行一些網絡抓取。 我很確定我寫這個for循環是錯誤的。 關於使其異步的一些事情。 但我最近開始，我不明白這意味着什么。 我也可能完全錯了。

for (let i = 0; i < list.length; i++) {
    axios.get(list[i].link).then((res) => {
        const $ = cheerio.load(res.data);
        var name = $('.header').find('.itemprop').text()
        $('.knownfor-title').each((i, el) => {
            var movie = $(el).find('img').attr('src')
            var title = $(el).find('img').attr('title')
            var link = 'https://www.imdb.com' + $(el).find(".knownfor-title-role").find('a').attr('href')

            var data = {
                name,
                movie,
                title,
                link
            }
            writeStream.write(`${name}, ${movie}, ${title}, ${link} \n` ); 
            console.log(data)
        })  
    })
}

這是我得到的錯誤

(node:5293) UnhandledPromiseRejectionWarning: Error: read ECONNRESET
    at TLSWrap.onStreamRead (internal/stream_base_commons.js:205:27)


(node:5293) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 512)


(node:5293) UnhandledPromiseRejectionWarning: Error: read ETIMEDOUT
    at TLSWrap.onStreamRead (internal/stream_base_commons.js:205:27)
(node:5293) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 420)

你明白了

Answer 1

這應該是您的 axios 的語法 with.then() and.catch()

const axios = require('axios');

// Make a request for a user with a given ID
axios.get('/user?ID=12345')
  .then(function (response) {
    // handle success
    console.log(response);
  })
  .catch(function (error) {
    // handle error
    console.log(error);
  })
  .then(function () {
    // always executed
  });