nodejs抓取数据二(列表解析)

//解析列表数据
var http = require("http"),
    cheerio = require("cheerio"),
    mongoose = require(‘mongoose‘),
    db = mongoose.createConnection(‘mongodb://127.0.0.1:27017/crawl58‘);

db.on(‘error‘, function (error) {
    console.log(‘mongodb连接错误: ‘ + error);
});

//列表页面数据
var mongooseSchema = new mongoose.Schema({
    url: {type: String},//抓取地址
    type: {type: String},//类型
    content: {type: String},//抓取地址
    updateTime: {type: Date, default: Date.now},//数据抓取时间
    flag: {type: String, default: 0} //用于判断是否抓取过 0表示详情没有抓取过.
});
// model
var mongooseModel = db.model(‘pageList‘, mongooseSchema);//代理记账

//存储数据
var parseListSchema = new mongoose.Schema({
    url: {type: String},//抓取地址
    detailUrl: {type: String},//详情地址
    type: {type: String},//类型
    title: {type: String},//标题
    company: {type: String},//公司名称
    contact: {type: String},//联系人
    score: {type: String},//评分
    phone: {type: String},//电话
    updateTime: {type: Date, default: Date.now},//数据解析时间
    flag: {type: String, default: 0} //用于判断是否抓取过 0表示详情没有抓取过.
});
// model
var parseListModel = db.model(‘parseList‘, parseListSchema);//代理记账

var pageNo = 0;
var data;//保存取出的数据
function queryList() {
    var condition = {
        url: ‘http://cd.58.com/yanzi/pn16/?PGTID=139112794188694845657499716&ClickID=1‘
    }
    mongooseModel.find(condition, function (error, result) {
        if (error) {
            console.log(error);
        } else {
            //解析数据
            data = result;
            console.log(‘开始解析...‘);
            parseList();
        }
    });//.skip(0).limit(100);//分页解析
};

//解析
function parseList() {
    //解析数据并存入数据库
    if (!data[pageNo]) {
        console.log(‘解析完成. 页码: ‘ + pageNo);
        //更新数据库,修改解析标志位  暂时不处理.

        return false;
    }
    var listItem = data[pageNo];
    var listContent = listItem.content;
    if (!listContent) {
        pageNo = pageNo + 1;
        parseList();
        return false;
    }
    var $ = cheerio.load(listContent);
    
    //解析页面
    var trElements = $(‘.small-tbimg>tr‘);
    var docArray = [];
    trElements.each(function (index, ele) {
        if ($(ele).find(‘td.dev‘).length > 0) {
            //已经没有这个类型的数据了.
            return false;
        }
        var contact = $(ele).find(‘div.tdiv .f14‘).first().text();
        if (contact) {
            contact = contact.replace(‘:‘, ‘‘);
        }

        var title = $(ele).find(‘div.tdiv>a‘).first().text();

        var company = $(ele).find(‘a.u‘).first().text();
        if (!company) {
            var companyBox = $(ele).find(‘div.tdiv‘);
            companyBox.find(‘b,a,span,i‘).remove();
            company = decodeUtf8(companyBox.html());
            if (company && company.indexOf(‘<br>‘) > 0) {
                company = company.replace(‘company‘, ‘‘).replace(‘%uA0‘, ‘‘);
                company = company.split(‘<br>‘)[2];
            }
        }

        var score = $(ele).find(‘.star00‘).first().attr(‘title‘);

        var detailUrl = $(ele).find(‘div.pjdiv a‘).first().attr(‘href‘);
        if (!detailUrl) {
            detailUrl = $(ele).find(‘div.tdiv a‘).first().attr(‘href‘);
            if (!detailUrl) {
                detailUrl = $(ele).find(‘a.t‘).first().attr(‘href‘);
            }
        } else {
            detailUrl = detailUrl.replace(‘showtype=yuyue&‘, ‘‘);
        }

        var phone = $(ele).find(‘.jumpDiv_tel‘).first().text();
        if (phone) {
            phone = getNumber(phone);
        }
        var item = {
            contact: contact,
            type: listItem.type,
            title: title,
            url: listItem.url,
            detailUrl: detailUrl,
            company: company,
            score: score,
            phone: phone
        };
        docArray.push(item);
    });

    //存入数据库
    parseListModel.create(docArray, function (error) {
        if (error) {
            console.log(error);
        } else {
            console.log(‘保存成功  页码: ‘ + pageNo + ‘  条数: ‘ + docArray.length);
            pageNo = pageNo + 1;
            parseList();
        }
    });
};

//解码utf-8
function decodeUtf8(str) {
    return unescape(str.replace(/&#x/g, ‘%u‘).replace(/;/g, ‘‘))
};

//提取电话号码
function getNumber(str) {
    var reg = /[0-9][0-9]*/g;
    return str.match(reg).join(‘-‘);//带区号的电话号码
};

//这里为整个解析的开始 -- 特么这么烂的代码自己都看不下去了,唯一看得过去的是,能用  .O(∩_∩)O.
//调用...1.取出数据;2 解析数据并存入数据库
queryList();