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index.js
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index.js
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var Crawler = require("crawler")
let fs = require("fs")
let os = require('os')
let collect = require('collect.js')
const cluster = require('cluster');
let URL = require('url')
var categoriesCount = null
var productCount = null
// console.log(process.env.NODE_ENV)
// if(){
// }
var fileName = null
var count = collect()
var categoriesError = collect()
var productError = collect()
var spider = new Crawler({
maxConnections: 20,
// This will be called for each crawled page
callback: function (error, res, done) {
if (error) {
console.log(error)
} else {
var $ = res.$
console.log($("title").text())
}
done()
}
})
fileName = 'data/' + new Date().getTime() + '.json'
fs.writeFile(fileName, '[ ', (err) => {
if (err) throw err
console.log('文件已初始化')
})
spider.on('drain', function () {
// For example, release a connection to database.
fs.readFile(fileName, function (err, data) {
if (err) throw err
const file = fs.createWriteStream(fileName, { flags: 'r+', start: data.length - 1 })
file.write(os.EOL + ']')
file.end()
file.on('finish', () => {
var product = collect();
fs.readdir('data', (err, data) => {
if (err) throw err
for (i = 0, len = data.length; i < len; i++) {
fs.readFile('data/' + data[i], (err, data) => {
if (err) throw err;
let item = collect(eval("(" + data.toString().replace(/[\r\n\t\s]/g, "") + ")")).unique('product_id')//.pluck('product_id');
product = product.merge(item.all()).unique('product_id')
// console.log(product.count())
productsFile = 'data/products' + new Date().getTime() + '.json'
fs.open(productsFile, 'a+', (err, fd) => {
const file = fs.createWriteStream(productsFile, {
flags: 'a+',
fd: fd
})
file.write('[')
for (let index = 0, length = products.count(); index < length; index++) {
const product = products.get(index)//[index];
product = os.EOL + JSON.stringify(product)
if (index + 1 < length) {
product += ','
}
file.write(product)
}
file.end(os.EOL + ']')
})
});
}
// console.log( collect( eval("(" + data.toString().replace(/[\r\n\t\s]/g, "") + ")") ).unique('product_id').count() )
});
});
})
})
// productPage('https://www.ikea.cn/cn/zh/catalog/products/30348933/')
spider.queue({
url: 'https://www.ikea.cn/cn/zh/catalog/allproducts/',
// jQuery: false,
callback: function (error, res, done) {
if (error) {
console.log(error)
} else {
var $ = res.$
let requestUrl = res.request.uri.href
$(".productCategoryContainer a").each(function (categoriesPageindex, element) {
let href = $(this).attr('href')
if (categoriesCount && categoriesPageindex == categoriesCount) {
return false
}
// console.log(href)
// console.log(URL)
categoriesPage(URL.resolve(requestUrl, href))
})
}
done()
}
})
function categoriesPage(uri) {
// console.log(fileName)
spider.queue({
uri: uri,
callback: function (error, res, done) {
let requestUrl = res.request.uri.href
if (error) {
console.log(error)
categoriesError.push(requestUrl)
} else {
let $ = res.$
var products = []
$(".threeColumn.product").each(function (productPageindex, element) {
let id = $(this).attr('id')
var product = {}
product.link = $(this).find(".productLink").attr('href')
if (productCount && productPageindex == productCount) {
return false
}
// cluster.fork({
// file: fileName,
// url: URL.resolve(requestUrl, product.link),
// spider:spider
// })
count.push(product.link)
productPage(URL.resolve(requestUrl, product.link))
// product.product_id = product.link.split("/")[5]
// product.img = $(this).find(".prodImg").attr('src')
// productDetails = $(this).children('.productDetails')
// product.name = productDetails.find(".productTitle").text()
// var priceElement = productDetails.find(".price.regularPrice").clone()
// priceElement.find('.comparisonContainer').remove()
// var priceUnit = priceElement.text().replace(/[\r\n\t]/g, "").split("/")
// product.unit = priceUnit[1]
// price = priceUnit[0].split(/[\s]/)
// product.currency = price[0]
// product.price = Number(price[1])
// var sizeString = productDetails.children('.moreInfo').children('.size').text()
// product.size = []
// sizeString.replace(/[\r\n\t]/g, "").split(',').map(function (item) {
// if (item == '') {
// return false
// }
// var item = item.split(':')
// var size = {}
// size.type = item[0]
// var value = item[1].trim().split(/[\s]/)
// size.value = value[0]
// size.unit = value[1]
// product.size.push(size)
// })
// // products.push(product)
// product = JSON.stringify(product)
// // console.log(product)
// fs.open(fileName, 'a+', (err, fd) => {
// const file = fs.createWriteStream('data.json', {
// flags: 'r+',
// fd: fd
// })
// file.write(os.EOL + product + ',')
// file.end()
// })
})
}
done()
}
})
}
function productPage(uri) {
spider.queue({
uri: uri,
callback: function (error, res, done) {
let requestUrl = res.request.uri.href
if (error) {
console.log(error)
productError.push(requestUrl)
} else {
if (res.statusCode != 200) {
productError.push(requestUrl)
done()
return false
}
var $ = res.$
var product = {}
product.link = requestUrl
product.product_id = product.link.split("/")[7]
// console.log(requestUrl)
// console.log(product)
let productData = collect(JSON.parse(res.body.match(/jProductData = ({[\s\S]*?});/)[1]).product.items).keyBy('partNumber').get(product.product_id)
// console.log(productData)
product.name = productData.name // $("#name").text().replace(/[\r\n\t]/g, "")
product.type = productData.type // $("#type").text().replace(/[\r\n\t]/g, "")
product.color = productData.color
prodPrice = $("#prodPrice")
price = prodPrice.children("#price1").text().trim().split(/[\s]/)
product.currency = price[0]
product.price = Number(price[1])
product.unit = prodPrice.children('.productunit').text().replace(/[\r\n\t\/]/g, "").trim()
product.number = $("#itemNumber").text()
// let sizeString = eval("'" + $("#metric").html().replace(/[\r\n\t]/g, "").replace(/&#x(.*?)/g, "\\u$1") + "'").trim().split('<br>').filter(d => d)
sizeString = productData.metric.split('<br/>').filter(d => d)
product.assembled_size = []
sizeString.map(function (item) {
if (item == '') {
return false
}
item = item.split(':')
// console.log(item)
let size = {}
size.type = item[0]
let value = item[1].trim().split(/[\s]/)
size.value = value[0]
size.unit = value[1]
product.assembled_size.push(size)
})
// product.number = $("#itemNumber").text()
let series = $("#moreSeriesContainer").find('#gotoSSC_lnk1')
// product.series={}
// product.series.url = series.attr('href')
// product.series.name = series.text().replace(/[\r\n\t访问系列]/g, "").trim()
product.series = series.text().replace(/[\r\n\t访问系列]/g, "").trim()
// console.log(product)
// console.log( )
// console.log('jProductData = {"product":{}}'.match(/jProductData = (\S*?)/)[1])
product = JSON.stringify(product)
fs.open(fileName, 'a+', (err, fd) => {
const file = fs.createWriteStream(fileName, {
flags: 'r+',
fd: fd
})
file.write(os.EOL + product + ',')
file.end()
})
}
done()
}
})
}