如何修复 UnhandledPromiseRejectionWarning：错误：读取 ETIMEDOUT 和 UnhandledPromiseRejectionWarning：错误：写入 EPROTO 错误答案

【问题标题】：How do I fix UnhandledPromiseRejectionWarning: Error: read ETIMEDOUT and UnhandledPromiseRejectionWarning: Error: write EPROTO errors如何修复 UnhandledPromiseRejectionWarning：错误：读取 ETIMEDOUT 和 UnhandledPromiseRejectionWarning：错误：写入 EPROTO 错误
【发布时间】：2020-05-27 08:30:24
【问题描述】：

我正在使用 axios 和cheerio 进行一些网络抓取。我很确定我写这个 for 循环是错误的。关于使它异步的一些事情。但我最近开始，我不明白这意味着什么。我也可能完全错了。

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)
        })  
    })
}

这是我得到的错误

(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

【问题讨论】：

尝试将 .catch() 块也用于承诺拒绝处理

标签： javascript node.js axios cheerio

【解决方案1】：

这应该是带有 .then() 和 .catch() 的 axios 语法

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
  });

【讨论】：