小编use*_*508的帖子

我正在使用scrapy + selenium,因为我正在废弃的网站需要javascript进行身份验证.我使用selenium登录并将cookie传递给以下请求.

def login(self, response):
    driver = webdriver.Firefox()
    driver.get("http://www.site.com/login")
    driver.find_element_by_xpath("//input[@id='myname']").send_keys(settings['USERNAME'])
    driver.find_element_by_xpath("//input[@id='mypwd']").send_keys(settings['PASSWORD'])
    driver.find_element_by_xpath("//input[@name='Logon']").click()
    self.driver = driver
    return Request(url=driver.current_url, cookies=self.driver.get_cookies(), callback=self.after_login, dont_filter=True)

到目前为止一切都很好,因为cookie很粘,以下所有请求都能很好地工作.我的报废很长,所以在某些时候cookie过期,所以我需要重新登录.此时我正在传递一个带回调登录功能的新请求.这里失败了,因为新的cookie与旧的cookie合并.有没有办法重置cookie？

回答

@Drewness在他的回答中建议dont_merge_cookies在元字典中使用属性.由于以下原因,它无法正常工作.根据源代码,以下请求:

Request(url=driver.current_url, cookies=self.driver.get_cookies(), callback=self.after_login, meta={'dont_merge_cookies' : True}, dont_filter=True)

你传给他的饼干什么都不做.

在我的解决方案中,我决定跳过dont_merge_cookies属性,只需在创建请求之前重置响应头:

response.headers = {}
return Request(url=driver.current_url, cookies=self.driver.get_cookies(), callback=self.after_login, dont_filter=True)

flake8安装后我无法运行pip install flake8.重新安装pep8没有帮助.我在Mac OS X 10.9.2上运行默认的python.我的pep8版本是1.5.6.

 File "/usr/local/bin/flake8", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 2603, in <module>
    working_set.require(__requires__)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 666, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 565, in resolve
    raise DistributionNotFound(req)  # XXX put more info here
pkg_resources.DistributionNotFound: pep8>=1.4.6