目标：www.baidu.com
站在用户的角度思考问题，与客户深入沟通，找到衡阳县网站设计与衡阳县网站推广的解决方案，凭借多年的经验，让设计与互联网技术结合，创造个性化、用户体验好的作品，建站类型包括：网站制作、
成都网站制作、企业官网、英文网站、手机端网站、网站推广、域名与空间、
网站空间、企业邮箱。业务覆盖衡阳县地区。
源码：
import requests
url = 'http://www.baidu.com'
header = {
'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36'
}
free_proxy = {
#都是http类型地址
##'http': '163.204.241.160:9999'
'http': '123.206.54.52:8118'
}
response = requests.get(url=url, headers=header, proxies=free_proxy)
print(response.status_code)
使用代理'163.204.241.160:9999'出现
ProxyError：
Traceback (most recent call last):
File "D:\Software\python3.7.4\lib\site-packages\urllib3\connection.py", line 160, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw)
File "D:\Software\python3.7.4\lib\site-packages\urllib3\util\connection.py", line 80, in create_connection
raise err
File "D:\Software\python3.7.4\lib\site-packages\urllib3\util\connection.py", line 70, in create_connection
sock.connect(sa)
ConnectionRefusedError: [WinError 10061] 由于目标计算机积极拒绝，无法连接。
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "D:\Software\python3.7.4\lib\site-packages\urllib3\connectionpool.py", line 603, in urlopen
chunked=chunked)
File "D:\Software\python3.7.4\lib\site-packages\urllib3\connectionpool.py", line 355, in _make_request
conn.request(method, url, **httplib_request_kw)
File "D:\Software\python3.7.4\lib\http\client.py", line 1244, in request
self._send_request(method, url, body, headers, encode_chunked)
File "D:\Software\python3.7.4\lib\http\client.py", line 1290, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "D:\Software\python3.7.4\lib\http\client.py", line 1239, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "D:\Software\python3.7.4\lib\http\client.py", line 1026, in _send_output
self.send(msg)
File "D:\Software\python3.7.4\lib\http\client.py", line 966, in send
self.connect()
File "D:\Software\python3.7.4\lib\site-packages\urllib3\connection.py", line 183, in connect
conn = self._new_conn()
File "D:\Software\python3.7.4\lib\site-packages\urllib3\connection.py", line 169, in _new_conn
self, "Failed to establish a new connection: %s" % e)
urllib3.exceptions.NewConnectionError:
: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "D:\Software\python3.7.4\lib\site-packages\requests\adapters.py", line 449, in send
timeout=timeout
File "D:\Software\python3.7.4\lib\site-packages\urllib3\connectionpool.py", line 641, in urlopen
_stacktrace=sys.exc_info()[2])
File "D:\Software\python3.7.4\lib\site-packages\urllib3\util\retry.py", line 399, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='182.34.33.38', port=9999): Max retries exceeded with url: http://www.baidu.com/ (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError(': Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。')))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "D:/Study/工作/待解决问题/requests/requests_proxy.py", line 15, in
response = requests.get(url=url, headers=header, proxies=free_proxy)
File "D:\Software\python3.7.4\lib\site-packages\requests\api.py", line 75, in get
return request('get', url, params=params, **kwargs)
File "D:\Software\python3.7.4\lib\site-packages\requests\api.py", line 60, in request
return session.request(method=method, url=url, **kwargs)
File "D:\Software\python3.7.4\lib\site-packages\requests\sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "D:\Software\python3.7.4\lib\site-packages\requests\sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "D:\Software\python3.7.4\lib\site-packages\requests\adapters.py", line 510, in send
raise ProxyError(e, request=request)
requests.exceptions.ProxyError: HTTPConnectionPool(host='182.34.33.38', port=9999): Max retries exceeded with url: http://www.baidu.com/ (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError(': Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。')))查过自己电脑网络配置中没有设置代理。
使用代理'123.206.54.52:8118'出现
ChunkedEncodingError：
Traceback (most recent call last):
File "D:\Software\python3.7.4\lib\site-packages\urllib3\response.py", line 397, in _error_catcher
yield
File "D:\Software\python3.7.4\lib\site-packages\urllib3\response.py", line 479, in read
data = self._fp.read(amt)
File "D:\Software\python3.7.4\lib\http\client.py", line 457, in read
n = self.readinto(b)
File "D:\Software\python3.7.4\lib\http\client.py", line 501, in readinto
n = self.fp.readinto(b)
File "D:\Software\python3.7.4\lib\socket.py", line 589, in readinto
return self._sock.recv_into(b)
ConnectionResetError: [WinError 10054] 远程主机强迫关闭了一个现有的连接。
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "D:\Software\python3.7.4\lib\site-packages\requests\models.py", line 750, in generate
for chunk in self.raw.stream(chunk_size, decode_content=True):
File "D:\Software\python3.7.4\lib\site-packages\urllib3\response.py", line 531, in stream
data = self.read(amt=amt, decode_content=decode_content)
File "D:\Software\python3.7.4\lib\site-packages\urllib3\response.py", line 496, in read
raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
File "D:\Software\python3.7.4\lib\contextlib.py", line 130, in __exit__
self.gen.throw(type, value, traceback)
File "D:\Software\python3.7.4\lib\site-packages\urllib3\response.py", line 415, in _error_catcher
raise ProtocolError('Connection broken: %r' % e, e)
urllib3.exceptions.ProtocolError: ("Connection broken: ConnectionResetError(10054, '远程主机强迫关闭了一个现有的连接。', None, 10054, None)", ConnectionResetError(10054, '远程主机强迫关闭了一个现有的连接。', None, 10054, None))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "D:/Study/工作/待解决问题/requests/requests_proxy.py", line 16, in
response = requests.get(url=url, headers=header, proxies=free_proxy)
File "D:\Software\python3.7.4\lib\site-packages\requests\api.py", line 75, in get
return request('get', url, params=params, **kwargs)
File "D:\Software\python3.7.4\lib\site-packages\requests\api.py", line 60, in request
return session.request(method=method, url=url, **kwargs)
File "D:\Software\python3.7.4\lib\site-packages\requests\sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "D:\Software\python3.7.4\lib\site-packages\requests\sessions.py", line 686, in send
r.content
File "D:\Software\python3.7.4\lib\site-packages\requests\models.py", line 828, in content
self._content = b''.join(self.iter_content(CONTENT_CHUNK_SIZE)) or b''
File "D:\Software\python3.7.4\lib\site-packages\requests\models.py", line 753, in generate
raise ChunkedEncodingError(e)
requests.exceptions.ChunkedEncodingError: ("Connection broken: ConnectionResetError(10054, '远程主机强迫关闭了一个现有的连接。', None, 10054, None)", ConnectionResetError(10054, '远程主机强迫关闭了一个现有的连接。', None, 10054, None))推荐阅读：https://blog.csdn.net/wangzuxi/article/details/40377467
最后，将url = 'http://www.baidu.com' 改成 url = 'https://www.baidu.com'， 使用以上两个代理地址测试都能成功，结果：200
-----
换了一个新的代理： 'http': '47.93.36.195:8118'
url = 'http://www.baidu.com'
多次运行，返回状态有200,503，还有ChunkedEncodingError
由此可见，ChunkedEncodingError错误并不是代理问题，为稳定，还是将url改为https为好。
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新闻名称：PythonRequests：proxy代理错误-创新互联
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