1.scrapy_splash是scrapy的一个组件
scrapy_splash加载js数据基于Splash来实现的
Splash是一个Javascrapy渲染服务，它是一个实现HTTP API的轻量级浏览器，Splash是用Python和Lua语言实现的，基于Twisted和QT等模块构建
使用scrapy-splash最终拿到的response相当于是在浏览器全部渲染完成以后的网页源代码
2.scrapy_splash的作用
scrpay_splash能够模拟浏览器加载js，并返回js运行后的数据
3.scrapy_splash的环境安装
3.1 使用splash的docker镜像
docker info 查看docker信息
docker images 查看所有镜像
docker pull scrapinghub/splash 安装scrapinghub/splash
docker run -p 8050:8050 scrapinghub/splash & 指定8050端口运行
3.2.pip install scrapy-splash
3.3.scrapy 配置:
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SPLASH_URL = 'http://localhost:8050'DOWNLOADER_MIDDLEWARES = { 'scrapy_splash.SplashCookiesMiddleware': 723, 'scrapy_splash.SplashMiddleware': 725, 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware': 810,}SPIDER_MIDDLEWARES = { 'scrapy_splash.SplashDeduplicateArgsMiddleware': 100,}DUPEFILTER_CLASS = 'scrapy_splash.SplashAwareDupeFilter'HTTPCACHE_STORAGE = 'scrapy_splash.SplashAwareFSCacheStorage' |
3.4.scrapy 使用
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from scrapy_splash import SplashRequestyield SplashRequest(self.start_urls[0], callback=self.parse, args={'wait': 0.5}) |
4.测试代码：
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import datetimeimport os import scrapyfrom scrapy_splash import SplashRequest from ..settings import LOG_DIR class SplashSpider(scrapy.Spider): name = 'splash' allowed_domains = ['biqugedu.com'] start_urls = ['http://www.biqugedu.com/0_25/'] custom_settings = { 'LOG_FILE': os.path.join(LOG_DIR, '%s_%s.log' % (name, datetime.date.today().strftime('%Y-%m-%d'))), 'LOG_LEVEL': 'INFO', 'CONCURRENT_REQUESTS': 8, 'AUTOTHROTTLE_ENABLED': True, 'AUTOTHROTTLE_TARGET_CONCURRENCY': 8, 'SPLASH_URL': 'http://localhost:8050', 'DOWNLOADER_MIDDLEWARES': { 'scrapy_splash.SplashCookiesMiddleware': 723, 'scrapy_splash.SplashMiddleware': 725, 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware': 810, }, 'SPIDER_MIDDLEWARES': { 'scrapy_splash.SplashDeduplicateArgsMiddleware': 100, }, 'DUPEFILTER_CLASS': 'scrapy_splash.SplashAwareDupeFilter', 'HTTPCACHE_STORAGE': 'scrapy_splash.SplashAwareFSCacheStorage', } def start_requests(self): yield SplashRequest(self.start_urls[0], callback=self.parse, args={'wait': 0.5}) def parse(self, response): """ :param response: :return: """ response_str = response.body.decode('utf-8', 'ignore') self.logger.info(response_str) self.logger.info(response_str.find('http://www.biqugedu.com/files/article/image/0/25/25s.jpg')) |
scrapy-splash接收到js请求：
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原文链接：https://blog.csdn.net/zhu6201976/article/details/106518029
