我写了一个带有木偶的网络刮板。它从作业门户中筛选作业。我可以显示标题,位置和图像。
从我的抓取器创建的数组如下:
[{
"id": "2018-12-03T14:12:03Z",
"position": "Frontend Entwickler React (w/m)",
"company": "Muster AG",
"image": "https://www.stepstone.de/upload_de/logo/blabla.gif",
"date": "2018-12-03T14:12:03Z",
"href": "https://www.stepstone.de/stellenangebote--Frontend-Entwickler"
}]
这是我的scraper.js的代码:
const fs = require('fs')
const path = require('path')
const puppeteer = require('puppeteer')
;(async () => {
const browser = await puppeteer.launch()
const page = await browser.newPage()
await page.goto(
'https://www.stepstone.de/5/ergebnisliste.html?stf=freeText&ns=1&qs=%5B%7B%22id%22%3A%22231794%22%2C%22description%22%3A%22Frontend-Entwickler%2Fin%22%2C%22type%22%3A%22jd%22%7D%2C%7B%22id%22%3A%22300000115%22%2C%22description%22%3A%22Deutschland%22%2C%22type%22%3A%22geocity%22%7D%5D&companyID=0&cityID=300000115&sourceOfTheSearchField=homepagemex%3Ageneral&searchOrigin=Homepage_top-search&ke=Frontend-Entwickler%2Fin&ws=Deutschland&ra=30'
)
const stepstone = await page.evaluate(() => {
return Array.from(document.querySelectorAll('.job-element'), card => {
const id = card.querySelector('time').getAttribute('datetime')
const href = card
.querySelector('.job-element__body > a')
.getAttribute('href')
const position = card
.querySelector('.job-element__body__title')
.textContent.trim()
.replace(/^(.{45}[^\s]*).*/, '$1')
const company = card
.querySelector('.job-element__body__company')
.textContent.trim()
.replace(/^(.{20}[^\s]*).*/, '$1')
const image_element = card.querySelector('.job-element__logo img')
const image = image_element.dataset.src
? `https://www.stepstone.de${image_element.dataset.src}`
: image_element.src
const date = card.querySelector('time').getAttribute('datetime')
return {
id,
position,
company,
image,
date,
href
}
})
})
fs.writeFile(
path.join(__dirname, 'src/stepstone.json'),
JSON.stringify(stepstone),
err => {
if (err) {
console.error(err)
} else {
console.log('Great, it worked!')
}
}
)
await browser.close()
})()
我的工作方式:在抓取标题,职位等之后。我还想包括工作详细信息。因此,我告诉我的抓取工具转到存储此信息的数组中每个作业项目的href链接。
从该链接中获取作业详细信息类,就像上面一样。因此,我尝试映射上述数组,并告诉刮板从每个href链接中抓取项目,如下所示:
stepstone.map(async stone => {
const page = await browser.newPage()
await page.goto(stone.href)
const details = await page.evaluate(() => {
return document.querySelector('card__body')
})
return {
...stone,
details
}
})
我的问题:
但是,JSON文件不会使用“详细信息”键更新(该键应包含来自'card__body'
的信息)。
有什么建议吗? 谢谢!