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();