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use restful api to invoke nightmare scrapping multi site with promise wrapper
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import Nightmare from 'nightmare'; | |
import cheerio from 'cheerio'; | |
let nightmare = Nightmare({show: false}); | |
let nightmare2 = Nightmare({show: false}); | |
let nightmare3 = Nightmare({show: false}); | |
const urlObject = { | |
site1: 'http://www.site1.com', | |
site2: 'http://www.site2.com', | |
site3: 'http://www.site3.com' | |
}; | |
export function getScrap(req, res){ | |
let result = {}; | |
result.site1 = { | |
topList: [] | |
}; | |
result.site2 = { | |
topList: [] | |
}; | |
result.site3 = { | |
topList: [] | |
}; | |
const pro1 = Promise.resolve( | |
nightmare | |
.goto(urlObject.site1) | |
.wait(200) | |
.evaluate(() => { | |
console.log('site1 into evaluate'); | |
return document.querySelector('.ninenine').innerHTML; | |
}) | |
.end() | |
) | |
.then((html) => { | |
let $ = cheerio.load(html); | |
let tt = $('.horizontal-li'); | |
let sections = $(".section-board-title"); | |
sections.each((index, elm) => { | |
if($(elm).text() === 'TopList'){ | |
$(elm).next('ul').find('li').each((index, elm_li) => { | |
let title =$(elm_li).find('.cabinet-instruction').text(); | |
let price =$(elm_li).find('.cabinet-middle .price').text(); | |
let imgSrc = $(elm_li).find('.cabinet-img').attr('data-temp-src'); | |
if(title !== '' && price !==''){ | |
result.site1.topList.push({ | |
title, | |
price, | |
imgSrc | |
}); | |
} | |
}); | |
} | |
}); | |
}) | |
.catch((err) => { | |
console.log('site1 scrap err:', err); | |
return res.status(400).send({reason:'site1 scrap err'}); | |
}); | |
const pro2 = Promise.resolve( | |
nightmare2 | |
.goto(urlObject.site2) | |
.wait(200) | |
.evaluate(() => { | |
return document.querySelector('.ninenine').innerHTML; | |
}) | |
.end() | |
) | |
.then((html) => { | |
let $ = cheerio.load(html); | |
let tt = $('.horizontal-li'); | |
let sections = $(".section-board-title"); | |
sections.each((index, elm) => { | |
if($(elm).text() === 'TopList'){ | |
$(elm).next('ul').find('li').each((index, elm_li) => { | |
let title =$(elm_li).find('.cabinet-instruction').text(); | |
let price =$(elm_li).find('.cabinet-middle .price').text(); | |
let imgSrc = $(elm_li).find('.cabinet-img').attr('data-temp-src'); | |
if(title !== '' && price !==''){ | |
result.site2.topList.push({ | |
title, | |
price, | |
imgSrc | |
}); | |
} | |
}); | |
} | |
}); | |
}) | |
.catch((err) => { | |
console.log('site2 scrap err:', err); | |
return res.status(400).send({reason:'site2 scrap err'}); | |
}); | |
const pro3 = Promise.resolve( | |
nightmare3 | |
.goto(urlObject.site3) | |
.wait(200) | |
.evaluate(() => { | |
return document.querySelector('#layout').innerHTML; | |
}) | |
.end() | |
) | |
.then((html) => { | |
let $ = cheerio.load(html); | |
let sections = $(".pditem"); | |
sections.each((index, elm) => { | |
let title = $(elm).find('.name').text(); | |
let price = $(elm).find('.price').find('span').eq(1).text(); | |
let imgSrc = ['www.site3.com',$(elm).find('li').eq(1).find('img').attr('src')].join(''); | |
result.site3.topList.push({ | |
title, | |
price, | |
imgSrc | |
}); | |
}); | |
}) | |
.catch((err) => { | |
console.log('site3 scrap err:', err); | |
return res.status(400).send({reason:'site3 scrap err'}); | |
}); | |
Promise.all([pro1, pro2, pro3]) | |
.then(values => { | |
res.json(result); | |
}) | |
.catch((err) => { | |
return res.status(500).send({reason:err.toString()}); | |
}); | |
} |
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