爬虫使用selenium和PhantomJS获取动态数据

• 创建一个scrapy项目，在终端输入如下命令后用pycharm打开桌面生成的zhilian项目

cd Desktop

scrapy startproject zhilian

cd zhilian

scrapy genspider Zhilian sou.zhilian.com

• middlewares.py里添加如下代码：

from scrapy.http.response.html import HtmlResponse

class PhantomjsMiddleware(object):
    def process_request(self,request,spider):
        if spider.name == 'Zhilian':
            spider.driver.get(request.url)
            spider.driver.implicitly_wait(10)

            response = HtmlResponse(url=spider.driver.current_url,
                                    request=request,
                                    body=spider.driver.page_source,
                                    encoding='utf-8'
                                    )
            return response

• settings.py里添加如下代码：

DOWNLOADER_MIDDLEWARES = {
    # 'zhilian.middlewares.ZhilianDownloaderMiddleware': 543,
    'zhilian.middlewares.PhantomjsMiddleware': 1,
}

• zhilian.py里添加如下代码：

from selenium import webdriver

def __init__(self):
    self.driver =webdriver.PhantomJS() # 在ZhilianSpider这个类中添加这个方法

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