仅做了必要的注释，我太懒了。目前只是一个雏形，实现基本的需求。有时间会修改的完善一些。

/* * @Author: jiahaiLiu * @Date:   2017-07-17 10:44:03 * @Last Modified by:   jiahaiLiu * @Last Modified time: 2017-07-17 18:53:48 * @Usage: node crawler [100] */'use strict';/* * Request is designed to be the simplest way possible to make http calls.  * It supports HTTPS and follows redirects by default. */const request = require('request');// cheerio是为服务器特别定制的，快速、灵活、实施的jQuery核心实现.const cheerio = require('cheerio');/* * Async is a utility module which provides straight-forward, * powerful functions for working with asynchronous JavaScript. */const async = require('async');const path = require('path');const fs = require('fs');const url = require('url');// 自定义下载图片数量，默认为100let targetAmount = process.argv.splice(2)[0] || 100;/*let getLink = 'http://image.so.com/j?q=%E7%BE%8E%E5%A5%B3&src=srp&correct=%E7%BE%8E%E5%A5%B3&sn=61&pn=60&sid=7e73fad3c0eb8367ede610dcf2784c0e&ran=0&ras=0';*/// 定义存储图片的文件夹名称let collect_pic_dir = './collect_pic/';let imgList = []; // 图片链接集合let dest,    start = 0;let t1 = new Date().getTime();let urlObj = {    protocol: 'http:',    slashes: true,    auth: null,    host: 'image.so.com',    port: null,    hostname: 'image.so.com',    hash: null,    query: {        q: '美女',        src: 'srp',        correct: '美女',        sn: '0',        pn: '60',        sid: '7e73fad3c0eb8367ede610dcf2784c0e',        ran: '0',        ras: '0'    },    pathname: '/j',};let urlLink,    resObj;if (!fs.existsSync(collect_pic_dir)) {    fs.mkdirSync(collect_pic_dir);    console.log('The ' + collect_pic_dir + ' folder has been created!');}loop(asyncDownload);function loop(cb) {    urlLink = url.format(urlObj);    console.log(urlLink);    request(urlLink, function(err, res, body) {        if (!err && res.statusCode === 200) {            /*const $ = cheerio.load(body);            JSON.parse($('script[id="initData"]').html()).list.forEach(function(item) {                imgList.push(item.img)            });*/            resObj = JSON.parse(res.body);            /* resObj example                        {                            total: 1500,                            end: false,                            sid: "6b57a007f19740b44d562f6e0ec6e050",                            ran: 0,                            ras: 0,                            lastindex: 121,                            ceg: 181011782,                            list: [{                                id: "7697671c2932936c55a39fd2e4d30ceb",                                qqface_down_url: false,                                downurl: false,                                grpmd5: false,                                type: 0,                                src: "1",                                index: 61,                                title: "美女诱惑_peaceful",                                litetitle: "",                                width: "1000",                                height: "1504",                                imgsize: "225KB",                                imgtype: "JPEG",                                key: "7913541bc5",                                dspurl: "blog.sina.com.cn",                                link: "http://blog.sina.com.cn/s/blog_a5bc8202010109ta.html",                                source: 2,                                img: "http://img165.poco.cn/mypoco/myphoto/20111030/05/54704062201110300502223689419360167_010.jpg",                                thumb_bak: "http://p0.so.qhmsg.com/t01da6596eb67097425.jpg",                                thumb: "http://p0.so.qhmsg.com/t01da6596eb67097425.jpg",                                _thumb_bak: "http://p0.so.qhmsg.com/sdr/_240_/t01da6596eb67097425.jpg",                                _thumb: "http://p0.so.qhmsg.com/sdr/_240_/t01da6596eb67097425.jpg",                                thumbWidth: 160,                                dsptime: "",                                thumbHeight: 240,                                grpcnt: "8",                                fixedSize: false                            }],                            boxresult: null,                            wordguess: null                    }         */            resObj.list.forEach(function(item) {                imgList.push(item.img);            });            if (imgList.length >= targetAmount) {                cb();            } else {                if (!resObj.end) {                    urlObj.query.sn = resObj.lastindex + 1;                    urlObj.query.sid = resObj.sid;                    loop(cb);                } else {                    console.log('no more datas from source url');                }            }        }    });}// download picturefunction asyncDownload() {    console.log('图片总数：', imgList.length);    async.mapSeries(imgList, function(item, callback) {            setTimeout(function() {                downloadPic(item, collect_pic_dir + start + '.jpg');                callback(null, item);                start++;            }, 400);        }, function(err, results) {            let t2 = new Date().getTime();            console.log('全部完成，总耗时：', (t2 - t1) + 'ms';            });    }    function downloadPic(src, dest) {        request            .get(src)            .on('response', function(response) {                // console.log (response);                // console.log(response.statusCode) // 200                 // console.log(response.headers['content-type']) // 'image/png'             })            .on('error', function(err) {                console.log(err)            })            .pipe(fs.createWriteStream(dest));    }