我使用BaseHTTPRequestHandler
创建了简单的HTTP Server。问题是,当我想使用来自客户端的请求发布一些数据时,我得到ConnectionError
。我从requests
lib文档中做了简单的请求。同样有趣的是,HTTP Server将从客户端接收数据并将其打印到控制台。我不明白它是如何可能的。
客户端:
def post_data():
"""Client method"""
json_data = {
'sender': 'User',
'receiver': 'MY_SERVER',
'message': 'Hello server! Sending some data.'}
data_headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
data_payload = json.dumps(json_data)
try:
post = requests.post('http://localhost:8080/post', data=data_payload,
headers=data_headers)
print(post.status_code)
except ConnectionError as e:
print("CONNECTION ERROR: ")
print(e)
HTTP服务器:
def do_POST(self):
"""Server method"""
self.send_response(200)
print("Receiving new data ...")
content_length = int(self.headers['Content-Length'])
post_data = self.rfile.read(content_length)
print(post_data)
服务器结果:
C:\Users\mypc\Projects\PythonFiles\httpserver>python server.py
Fri Jan 5 01:09:12 2018: HTTP Server started on port 8080.
127.0.0.1 - - [05/Jan/2018 01:09:21] "POST /post HTTP/1.1" 200 -
Receiving new data ...
b'{"sender": "User", "receiver": "MY_SERVER", "message": "Hello server! Sending some data."}'
客户结果:
C:\Users\mypc\Projects\PythonFiles\httpserver>python client.py
CONNECTION ERROR:
('Connection aborted.', RemoteDisconnected('Remote end closed connection without response',))
C:\Users\mypc\Projects\PythonFiles\httpserver>
无异常阻止的错误:
Traceback (most recent call last):
File "C:\Python36\lib\site-packages\urllib3\connectionpool.py", line 601, in urlopen
chunked=chunked)
File "C:\Python36\lib\site-packages\urllib3\connectionpool.py", line 387, in _make_request
six.raise_from(e, None)
File "<string>", line 2, in raise_from
File "C:\Python36\lib\site-packages\urllib3\connectionpool.py", line 383, in _make_request
httplib_response = conn.getresponse()
File "C:\Python36\lib\http\client.py", line 1331, in getresponse
response.begin()
File "C:\Python36\lib\http\client.py", line 297, in begin
version, status, reason = self._read_status()
File "C:\Python36\lib\http\client.py", line 266, in _read_status
raise RemoteDisconnected("Remote end closed connection without"
http.client.RemoteDisconnected: Remote end closed connection without response
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Python36\lib\site-packages\requests\adapters.py", line 440, in send
timeout=timeout
File "C:\Python36\lib\site-packages\urllib3\connectionpool.py", line 639, in urlopen
_stacktrace=sys.exc_info()[2])
File "C:\Python36\lib\site-packages\urllib3\util\retry.py", line 357, in increment
raise six.reraise(type(error), error, _stacktrace)
File "C:\Python36\lib\site-packages\urllib3\packages\six.py", line 685, in reraise
raise value.with_traceback(tb)
File "C:\Python36\lib\site-packages\urllib3\connectionpool.py", line 601, in urlopen
chunked=chunked)
File "C:\Python36\lib\site-packages\urllib3\connectionpool.py", line 387, in _make_request
six.raise_from(e, None)
File "<string>", line 2, in raise_from
File "C:\Python36\lib\site-packages\urllib3\connectionpool.py", line 383, in _make_request
httplib_response = conn.getresponse()
File "C:\Python36\lib\http\client.py", line 1331, in getresponse
response.begin()
File "C:\Python36\lib\http\client.py", line 297, in begin
version, status, reason = self._read_status()
File "C:\Python36\lib\http\client.py", line 266, in _read_status
raise RemoteDisconnected("Remote end closed connection without"
urllib3.exceptions.ProtocolError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response',))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "client.py", line 137, in <module>
start_parser()
File "client.py", line 101, in start_parser
send_requests(args.get, args.post)
File "client.py", line 51, in send_requests
post_data()
File "client.py", line 129, in post_data
headers=data_headers)
File "C:\Python36\lib\site-packages\requests\api.py", line 112, in post
return request('post', url, data=data, json=json, **kwargs)
File "C:\Python36\lib\site-packages\requests\api.py", line 58, in request
return session.request(method=method, url=url, **kwargs)
File "C:\Python36\lib\site-packages\requests\sessions.py", line 508, in request
resp = self.send(prep, **send_kwargs)
File "C:\Python36\lib\site-packages\requests\sessions.py", line 618, in send
r = adapter.send(request, **kwargs)
File "C:\Python36\lib\site-packages\requests\adapters.py", line 490, in send
raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response',))
答案 0 :(得分:10)
看起来服务器在没有发送完整响应的情况下提前终止连接。我已经浏览了文档,我认为这是问题(强调增加):
send_response(code, message=None)
添加响应标头 标头缓冲并记录接受的请求。 HTTP响应行 写入内部缓冲区,然后是服务器和日期 头。这两个标题的值从中获取 分别是version_string()和date_time_string()方法。如果 服务器不打算使用。发送任何其他标头 send_header()方法,然后send_response()后跟一个 end_headers()调用。
版本3.3中已更改:标题存储在内部缓冲区中 需要明确调用end_headers()。
所以你可能只需要将调用添加到end_headers
。如果您正在阅读一个旧示例(在Python 3.3之前),则不需要这样做。