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damai-spider.js
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damai-spider.js
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//抓取大麦网27个关键城市的场馆清单
//启用strict模式
//@author: [email protected]
//@since: 20151018
'use strict';
var express = require('express');
var url = require('url'); //解析操作url
var superagent = require('superagent'); //这三个外部依赖不要忘记npm install
var cheerio = require('cheerio');
var eventproxy = require('eventproxy');
var csv = require('csv');
//
function Venue(venue_id,venue_name,
venue_cityid, venue_city,
venue_area,
venue_fullhref,
venue_type,
venue_address,
venue_matches,
venue_offer) {
this.venue_id = venue_id;
this.venue_name = venue_name;
this.venue_cityid = venue_cityid;
this.venue_city = venue_city;
this.venue_area = venue_area;
this.venue_fullhref = venue_fullhref;
this.venue_type = venue_type;
this.venue_address = venue_address;
this.venue_matches = venue_matches;
this.venue_offer = venue_offer;
}
//var objVeneue = new Venue("1", "The first Venue");
//console.log(objVeneue.venue_name);
//大麦北京市场馆库
//定义Venue类
var venueList = [];
var venue_ids = [];
var venue_names = [];
var venue_cityids = [];
var venue_citys = [];
var venue_areas = [];
var venue_fullhrefs = [];
var venue_types = [];
var venue_addresss = [];
var venue_matchess = [];
var venue_offers = [];
var epcity = new eventproxy();
var ep = new eventproxy();
var targetUrls = [
"http://venue.damai.cn/search.aspx?cityID=852",
"http://venue.damai.cn/search.aspx?cityID=872",
"http://venue.damai.cn/search.aspx?cityID=893",
"http://venue.damai.cn/search.aspx?cityID=906",
"http://venue.damai.cn/search.aspx?cityID=1209",
"http://venue.damai.cn/search.aspx?cityID=1377",
"http://venue.damai.cn/search.aspx?cityID=1580",
"http://venue.damai.cn/search.aspx?cityID=586",
"http://venue.damai.cn/search.aspx?cityID=3250",
"http://venue.damai.cn/search.aspx?cityID=1038",
"http://venue.damai.cn/search.aspx?cityID=200",
"http://venue.damai.cn/search.aspx?cityID=1087",
"http://venue.damai.cn/search.aspx?cityID=923",
"http://venue.damai.cn/search.aspx?cityID=372",
"http://venue.damai.cn/search.aspx?cityID=848",
"http://venue.damai.cn/search.aspx?cityID=1847",
"http://venue.damai.cn/search.aspx?cityID=1597",
"http://venue.damai.cn/search.aspx?cityID=917",
"http://venue.damai.cn/search.aspx?cityID=356",
"http://venue.damai.cn/search.aspx?cityID=1229",
"http://venue.damai.cn/search.aspx?cityID=702",
"http://venue.damai.cn/search.aspx?cityID=2024",
"http://venue.damai.cn/search.aspx?cityID=2148",
"http://venue.damai.cn/search.aspx?cityID=1835",
"http://venue.damai.cn/search.aspx?cityID=2648",
"http://venue.damai.cn/search.aspx?cityID=1077",
"http://venue.damai.cn/search.aspx?cityID=2103",
];
let cityMap = {};
targetUrls.forEach(function( cityurl, index) {
let cityID = parseInt(/cityID=(\d+)/.exec(cityurl)[1]);
cityMap[cityID] = index+1;
})
// console.log(cityMap)
//@todo: 希望遍历上述27个城市后执行如下代码
epcity.after('city_by_city', targetUrls.length, function(cityurls){
// console.log("begin");
// console.log(targetUrls);
let realcount = 0;
let venue_name ="";
let venue_id = "";
let venue_address = "";
let venue_type = "";
let venue_matches = "";
let venue_city = "";
let venue_cityid = "";
let venue_area = "";
let venue_fullhref = "";
let venue_offer = "";
for (let i=0;i<venue_names.length;i++){
venue_name = venue_names[i];
venue_id = venue_ids[i];
venue_address = venue_addresss[i];
venue_type = venue_types[i];
venue_matches = venue_matchess[i];
venue_city = venue_citys[i];
venue_cityid = venue_cityids[i];
venue_area = venue_areas[i];
venue_fullhref = venue_fullhrefs[i];
venue_offer = venue_offers[i];
if (!venue_name.startsWith("测试部专用")) {
realcount += 1;
const objVeneue = new Venue(venue_id,venue_name,
venue_cityid, venue_city,
venue_area,
venue_fullhref,
venue_type,
venue_address,
venue_matches,
venue_offer);
venueList.push(objVeneue);
//console.log('"' + venue_id + '"' + ";" + '"'+venue_name+'"', ";", '"'+venue_cityid+'"',";", '"'+venue_city+'"',";", '"'+venue_area+'"',";", '"'+venue_address+'"',";", '"'+venue_type+'"',";", '"'+ venue_matches+'"',";", '"'+venue_offer+'"',";", '"'+venue_fullhref+'"');
}
}
venueList.sort(sortVenue);
venueList.forEach(function (v) {
const csvstring = [v.venue_id,v.venue_name,
v.venue_cityid,v.venue_city,
v.venue_area,v.venue_address,
v.venue_type,
venue_matches,
venue_offer,
venue_fullhref].map(function(el) { return '"'+el+'"';}).join(";");
console.log(csvstring);
})
//console.log("get all citys.count " + cityurls.length);
//console.log("venue_count: " + realcount);
//console.log("end");
});
//如下场馆排序算法需要重新思考
function sortVenue(a,b)
{
let acityorder = cityMap[a.venue_cityid];
let bcityorder = cityMap[b.venue_cityid];
// console.log(a.venue_cityid, b.venue_cityid);
// console.log(acityorder, bcityorder);
if ((acityorder - bcityorder)==0) {
return parseInt(a.venue_id) > parseInt(b.venue_id);
}
return (acityorder > bcityorder);
}
// targetUrls.sort(sortNumber);
targetUrls.forEach(function(targetUrl){
superagent.get(targetUrl)
.end(function (err, res) {
// console.log(res);
// console.log(targetUrl);
const $ = cheerio.load(res.text);
let pagecount = 1;
let pageurlprefix = "";
let pageurls = [];
const cityID = parseInt(/cityID=(\d+)/.exec(targetUrl)[1]);
//通过CSS selector来筛选数据
$('.ml10').each(function (idx, element){
pagecount = parseInt(/(\d+)/.exec($(element).text())[1]);
// console.log(pagecount);
});
if (pagecount > 1) {
$('.pagination a').each(function(index, el) {
const $element = $(el);
const href = $element.attr('href');
if (/pageIndex\=(\d+)/.test(href)) {
const fullhref = url.resolve(targetUrl, href);
pageurlprefix = fullhref.substr(0, fullhref.indexOf("pageIndex="))+"pageIndex=";
return;
}
});
for(let i=0;i<pagecount;i++){
pageurls.push(pageurlprefix + (i+1));
}
// console.log(pageurls);
pageurls.sort();
}else{
pageurls.push(targetUrl);
}
ep.after('page_by_page' + targetUrl, pageurls.length, function(pageurls){
// console.log(pageurl);
// for (i=0;i<venue_names.length;i++){
// var venue_name = venue_names[i];
// var venue_address = venue_addresss[i];
// var venue_type = venue_types[i];
// var venue_matches = venue_matchess[i];
// var venue_city = venue_citys[i];
// var venue_area = venue_areas[i];
// var venue_offer = venue_offers[i];
// var venue_fullhref = venue_fullhrefs[i];
// console.log(venue_name,venue_city,venue_area,venue_address,venue_type,venue_matches,venue_offer,venue_fullhref);
// }
// console.log(venue_names.length);
epcity.emit("city_by_city", targetUrl);
});
//循环遍历每个页面
pageurls.forEach(function (pageurl){
superagent.get(pageurl)
.end(function (err, res) {
// console.log(res);
const $ = cheerio.load(res.text);
/////////////////////////////////////////////////
$('.clear a').each(function (idx, element) {
var $element = $(element);
$element.each(function(eidx, txtelement){
const $txtelement = $(txtelement);
const title = $txtelement.attr('title');
const href = $txtelement.attr('href');
const text = $txtelement.text();
const bMarkHref = /^(\/venue_\d+)/.test(href);
const bMarkText = /\[/.test(text);
if (bMarkHref && bMarkText) {
//
const regresult = /^(.*)\[(.*)\-(.*)\]$/.exec(text);
const venue_id = parseInt(/^\/venue_(\d+)/.exec(href)[1]);
const venue_name = regresult[1];
const venue_cityid = cityID;
const venue_city = regresult[2];
const venue_area = regresult[3];
const venue_fullhref = url.resolve(targetUrl, href);
// console.log(venue_name,venue_city,venue_area,venue_fullhref);
venue_ids.push(venue_id);
venue_names.push(venue_name);
venue_cityids.push(venue_cityid);
venue_citys.push(venue_city);
venue_areas.push(venue_area);
venue_fullhrefs.push(venue_fullhref);
}
});
//var title = url.resolve(pageurl, $element.attr('title'));
//console.log($element);
//console.log(element);
});
$('.clear .txt').each(function (idx, element) {
const $element = $(element);
$element.each(function(eidx, txtelement){
const $txtelement = $(txtelement);
const text = $txtelement.text();
// console.log(text);
const addr_prefix = "场馆地址：";
const type_prefix = "场馆类型：";
if (text.startsWith(addr_prefix)) {
venue_addresss.push(text.substr(addr_prefix.length));
}
if (text.startsWith(type_prefix)) {
venue_types.push(text.substr(type_prefix.length));
}
});
//var title = url.resolve(targetUrl, $element.attr('title'));
//console.log($element);
//console.log(element);
});
$('.clear .seat_muns').each(function (idx, element) {
const $element = $(element);
$element.each(function(eidx, txtelement){
const $txtelement = $(txtelement);
const text = $txtelement.text();
if (text != "适演剧种"){
venue_matchess.push(text);
}
// console.log(venue_matches);
});
//var title = url.resolve(targetUrl, $element.attr('title'));
//console.log($element);
//console.log(element);
});
$('.offer a').each(function (idx, element) {
const $element = $(element);
$element.each(function(eidx, txtelement){
const $txtelement = $(txtelement);
if( /(\d+)/.test($txtelement.text())){
venue_offers.push(/(\d+)/.exec($txtelement.text())[1]);
}else{
venue_offers.push("");
}
});
//var title = url.resolve(targetUrl, $element.attr('title'));
//console.log($element);
//console.log(element);
});
// console.log(targetUrl);
ep.emit('page_by_page' + targetUrl, pageurl);
});
});// end of page_by_page
});//end of first page
});