一般来说,我了解如何使用 Scrapy 和 x-path 来解析 html。但是,我不知道如何获取 HAR 数据。
mport scrapy
from scrapy_splash import SplashRequest
class QuotesSpider(scrapy.Spider):
name = 'quotes'
allowed_domains = ['quotes.toscrape.com']
start_urls = ['http://quotes.toscrape.com/js']
def start_requests(self):
for url in self.start_urls:
yield SplashRequest(url=url,
callback=self.parse,
endpoint='render.html')
def parse(self, response):
quotes = response.xpath('//*[@class="quote"]')
for quote in quotes:
yield { 'author': quote.xpath('.//*[@class="author"]/text()').extract_first(),
'quote': quote.xpath('.//*[@class="text"]/text()').extract_first()
}
script = """function main(splash)
assert(splash:go(splash.args.url))
splash:wait(0.3)
button = splash:select("li[class=next] a")
splash:set_viewport_full()
splash:wait(0.1)
button:mouse_click()
splash:wait(1)
return {url = splash:url(),
html = splash:html(),
har = splash:har()}
end """
yield SplashRequest(url=response.url,
callback=self.parse,
endpoint='execute',
args={'lua_source':script})
脚本中将 HAR 数据导出到文件的下一条语句是什么?如何将所有网络数据生成到文件中?任何见解将不胜感激。