Phantomjs设置浏览器useragent的方式

Selenium中使用PhantomJS，设置User-Agent的方法。

默认情况下，是没有自动设置User-Agent的；设置PhantomJS的user-agent

def __init__(self):
    cap = webdriver.DesiredCapabilities.PHANTOMJS
    cap["phantomjs.page.settings.resourceTimeout"] = 1000
    cap["phantomjs.page.settings.loadImages"] = True
    cap["phantomjs.page.settings.disk-cache"] = True

    cap[
        "phantomjs.page.settings.userAgent"] = "Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0",

    cap[
        "phantomjs.page.customHeaders.User-Agent"] = 'Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0',
    self.driver = webdriver.PhantomJS(desired_capabilities=cap)