Question

我想使用Selenium + Python在我的网页上找到损坏的链接。我尝试了上面的代码，但它显示了以下错误：

requests.exceptions.MissingSchema: Invalid URL 'None': No schema supplied. Perhaps you meant http://None?

代码试用：

for link in links:

    r = requests.head(link.get_attribute('href'))
    print(link.get_attribute('href'), r.status_code)

Snapshot of full code

Answer 1

此错误消息...

    raise MissingSchema(error)
requests.exceptions.MissingSchema: Invalid URL 'None': No schema supplied. Perhaps you meant http://None?

...表示在收集的 href 属性内，对Unicode域名和路径的支持失败。

此错误在models.py中的定义如下：

    # Support for unicode domain names and paths.
    scheme, auth, host, port, path, query, fragment = parse_url(url)
    if not scheme:
        raise MissingSchema("Invalid URL {0!r}: No schema supplied. "
                            "Perhaps you meant http://{0}?".format(url))

解决方案

一旦搜索结果可用于Google Home Page Search Box上的关键字硒，则可能正在尝试查找断开的链接。为此，您可以使用以下解决方案：

代码块：

import requests
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.keys import Keys 

options = webdriver.ChromeOptions() 
options.add_argument("start-maximized")
options.add_argument('disable-infobars')
driver=webdriver.Chrome(chrome_options=options, executable_path=r'C:\Utility\BrowserDrivers\chromedriver.exe')
driver.get('https://google.co.in/')
search = driver.find_element_by_name('q')
search.send_keys("selenium")
search.send_keys(Keys.RETURN)
links = WebDriverWait(driver, 10).until(EC.visibility_of_any_elements_located((By.XPATH, "//div[@class='rc']//h3//ancestor::a[1]")))
print("Number of links : %s" %len(links))
for link in links:
    r = requests.head(link.get_attribute('href'))
    print(link.get_attribute('href'), r.status_code)

控制台输出：

Number of links : 9
https://www.seleniumhq.org/ 200
https://www.seleniumhq.org/download/ 200
https://www.seleniumhq.org/docs/01_introducing_selenium.jsp 200
https://www.guru99.com/selenium-tutorial.html 200
https://en.wikipedia.org/wiki/Selenium_(software) 200
https://github.com/SeleniumHQ 200
https://www.edureka.co/blog/what-is-selenium/ 200
https://seleniumhq.github.io/selenium/docs/api/py/ 200
https://seleniumhq.github.io/docs/ 200

更新

根据您的反问，从 Selenium 角度规范地回答 xpath 为什么有效但 tagName 无效的原因有些困难。也许您可能希望对这些讨论进行更深入的研究：

Answer 2

尝试一下，我很确定会有更好的方法来完成此操作，这可能会解决您的问题，也可能无法解决您的问题。我希望在岸上的时间里，我想出了这种方法，它似乎对我有用。

<setting key="MaxLoginAttempts" value="3" />
<setting key="BeginDate" value="18-3-2019" />
<setting key="UserName" value="hello" />

输出

<setting key="MaxLoginAttempts" value="3" type="int"/>
<setting key="BeginDate" value="18-3-2019" type="datetime"/>
<setting key="UserName" value="hello" type="string"/>

requests.exceptions.MissingSchema：无效的网址“无”：尝试通过Selenium和Python查找断开的链接时，未提供任何模式

2 个答案:

解决方案

更新