urlerror 和 ssl.CertificateError

Question

我有以下代码：

from urllib.request import urlopen
from urllib.error import HTTPError, URLError
from bs4 import BeautifulSoup

# target = "https://www.rolcruise.co.uk/cruise-detail/1158731-hawaii-round-trip-honolulu-2020-05-23"
target = "https://www.rolcruise.co.uk"

try:
    html = urlopen(target)
except HTTPError as e:
    print("You got a HTTP Error. Something wrong with the path.")
    print("Here is the error code: " + str(e.code))
    print("Here is the error reason: " + e.reason)
    print("Happy for the program to end here"
except URLError as e:
    print("You got a URL Error. Something wrong with the URL.")
    print("Here is the error reason: " + str(e.reason))
    print("Happy for the program to end here")
else:
    bs_obj = BeautifulSoup(html, features="lxml")
    print(bs_obj)

如果我故意在输入 url 的某些部分时出错，url 错误处理会正常工作，即如果我故意输入 "htps" 而不是 "https"，或 "ww" 而不是 "www"，或 "u" 而不是 "uk"。例如

target = "https://www.rolcruise.co.u"

但是，如果主机名 ("rolcruise") 或 url 的 "co" 部分输入有误，urlerror 将不起作用，并且我收到一条错误消息，内容为 ssl.CertificateError。例如

target = "https://www.rolcruise.c.uk"

我不明白为什么 URLError 没有涵盖 url 中某处出现拼写错误的所有情况？
鉴于它正在发生，下一步如何处理ssl.CertificateError？

感谢您的帮助！

Answer 1

将 ssl 放入您的命名空间以开始：

import ssl

那么你就可以捕捉到那种异常：

try:
    html = urlopen(target)
except HTTPError as e:
    print("You got a HTTP Error. Something wrong with the path.")
    print("Here is the error code: " + str(e.code))
    print("Here is the error reason: " + e.reason)
    print("Happy for the program to end here"
except URLError as e:
    print("You got a URL Error. Something wrong with the URL.")
    print("Here is the error reason: " + str(e.reason))
    print("Happy for the program to end here")
except ssl.CertificateError:
     # Do your stuff here...
else:
    bs_obj = BeautifulSoup(html, features="lxml")
    print(bs_obj)

urlerror 和 ssl.CertificateError

urlerror and ssl.CertificateError

python

urllib