Python3.6问题总结之一：urllib.error.HTTPError: HTTP Error 400: Bad Request

import urllib.request
import http.cookiejar
import ssl

# 取消全局SSL验证，不写这句 可能会报SSL验证失败
ssl._create_default_https_context = ssl._create_unverified_context
baiduCookieFileName = "cookie.txt"
# 获取百度cookies
baidu_cookie = http.cookiejar.MozillaCookieJar(baiduCookieFileName)
proHandler = urllib.request.HTTPCookieProcessor(baidu_cookie)
opener = urllib.request.build_opener(proHandler)
# 注意这里是 https 不是http，我一开始写成http，一直报 urllib.error.HTTPError: HTTP Error 400: Bad Request
baidu_url = 'http://www.baidu.com'
# 访问百度
response = opener.open(baidu_url)
# 打印cookies
for item in baidu_cookie:
    print("name = " + item.name)
    print("value = " + item.value)

# 保存cookie到文件
baidu_cookie.save(ignore_discard=True, ignore_expires=True)

import urllib.request

import http.cookiejar

import ssl

# 取消全局SSL验证，不写这句可能会报SSL验证失败

ssl._create_default_https_context = ssl._create_unverified_context

baiduCookieFileName = "cookie.txt"

# 获取百度cookies

baidu_cookie = http.cookiejar.MozillaCookieJar(baiduCookieFileName)

proHandler = urllib.request.HTTPCookieProcessor(baidu_cookie)

opener = urllib.request.build_opener(proHandler)

# 注意这里是 https 不是http，我一开始写成http，一直报 urllib.error.HTTPError: HTTP Error 400: Bad Request

baidu_url = 'http://www.baidu.com'

# 访问百度

response = opener.open(baidu_url)

# 打印cookies

for item in baidu_cookie:

print("name = " + item.name)

print("value = " + item.value)

# 保存cookie到文件

baidu_cookie.save(ignore_discard=True, ignore_expires=True)

遇到urllib.error.HTTPError: HTTP Error 400: Bad Request，400: Bad Request这个错误，查了半天，最终发现是url错了。目标网站使用的是https协议，而我写的时候写成了http，则运行出现如下错误：

D:\python\python.exe E:/技术学习/Python代码/10.保存cookies到文件/savecookieinflie.py
Traceback (most recent call last):
  File "E:/技术学习/Python代码/10.保存cookies到文件/savecookieinflie.py", line 15, in <module>
    response = opener.open(baidu_url)
  File "D:\python\lib\urllib\request.py", line 532, in open
    response = meth(req, response)
  File "D:\python\lib\urllib\request.py", line 642, in http_response
    'http', request, response, code, msg, hdrs)
  File "D:\python\lib\urllib\request.py", line 570, in error
    return self._call_chain(*args)
  File "D:\python\lib\urllib\request.py", line 504, in _call_chain
    result = func(*args)
  File "D:\python\lib\urllib\request.py", line 650, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 400: Bad Request

进程已结束,退出代码1

D:\python\python.exe E:/技术学习/Python代码/10.保存cookies到文件/savecookieinflie.py

Traceback (most recent call last):

File "E:/技术学习/Python代码/10.保存cookies到文件/savecookieinflie.py", line 15, in <module>

response = opener.open(baidu_url)

File "D:\python\lib\urllib\request.py", line 532, in open

response = meth(req, response)

File "D:\python\lib\urllib\request.py", line 642, in http_response

'http', request, response, code, msg, hdrs)

File "D:\python\lib\urllib\request.py", line 570, in error

return self._call_chain(*args)

File "D:\python\lib\urllib\request.py", line 504, in _call_chain

result = func(*args)

File "D:\python\lib\urllib\request.py", line 650, in http_error_default

raise HTTPError(req.full_url, code, msg, hdrs, fp)

urllib.error.HTTPError: HTTP Error 400: Bad Request

进程已结束,退出代码1

解决方案，把链接的http协议改成https就解决了：

# 注意这里是 https 不是http，我一开始写成http，一直报 urllib.error.HTTPError: HTTP Error 400: Bad Request
baidu_url = 'https://www.baidu.com'

1 2	# 注意这里是 https 不是http，我一开始写成http，一直报 urllib.error.HTTPError: HTTP Error 400: Bad Request baidu_url = 'https://www.baidu.com'