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使用python3套接字连接到web服务器

python-sockets networking
  •  0
  • Tony Chou  · 技术社区  · 6 年前

    我在本地主机上运行python3运行django并收听 http://127.0.0.1:8000/

    我想用不同的方法来测试 request 和 socket 

    import requests
res = requests.request("GET", "http://127.0.0.1:8000/")
txt = res.content
print(res)
res.close()

# <Response [200]>

    运行良好,并且

    在我运行的django控制台上,它显示 [07/Jul/2018 16:04:26] "GET / HTTP/1.1" 200 6744

    现在改成 requests 到 插座 

    import socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 8000))
msg = b'GET / HTTP/1.1'
s.send(msg)
print(s)
s.close()

# <socket.socket fd=1324, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 55312), raddr=('127.0.0.1', 8000)>

    我的程序中没有显示错误

    但是在我运行的django控制台上出现了以下异常 

    Invalid HTTP_HOST header: 'tony.jhou-1.xxservice.com:8000'. You may need to add 'tony.jhou-1.xxservice.com:8000' to ALLOWED_HOSTS.
[07/Jul/2018 16:08:10] "GET / HTTP/1.1" 400 63266
Traceback (most recent call last):
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 138, in run
    self.finish_response()
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 180, in finish_response
    self.write(data)
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 332, in send_headers
    self.send_preamble()
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 255, in send_preamble
    ('Date: %s\r\n' % format_date_time(time.time())).encode('iso-8859-1')
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 453, in _write
    result = self.stdout.write(data)
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\socketserver.py", line 775, in write
    self._sock.sendall(b)
  File "D:\emc\ve\lib\site-packages\gevent\_socket3.py", line 459, in sendall
    return _socketcommon._sendall(self, data_memory, flags)
  File "D:\emc\ve\lib\site-packages\gevent\_socketcommon.py", line 358, in _sendall
    timeleft = __send_chunk(socket, chunk, flags, timeleft, end)
  File "D:\emc\ve\lib\site-packages\gevent\_socketcommon.py", line 287, in __send_chunk
    data_sent += socket.send(chunk, flags)
  File "D:\emc\ve\lib\site-packages\gevent\_socket3.py", line 440, in send
    return _socket.socket.send(self._sock, data, flags)
ConnectionAbortedError: [WinError 10053] 連線已被您主機上的軟體中止。
[07/Jul/2018 16:08:10] "GET / HTTP/1.1" 500 59
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 54587)
Traceback (most recent call last):
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 138, in run
    self.finish_response()
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 180, in finish_response
    self.write(data)
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 332, in send_headers
    self.send_preamble()
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 255, in send_preamble
    ('Date: %s\r\n' % format_date_time(time.time())).encode('iso-8859-1')
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 453, in _write
    result = self.stdout.write(data)
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\socketserver.py", line 775, in write
    self._sock.sendall(b)
  File "D:\emc\ve\lib\site-packages\gevent\_socket3.py", line 459, in sendall
    return _socketcommon._sendall(self, data_memory, flags)
  File "D:\emc\ve\lib\site-packages\gevent\_socketcommon.py", line 358, in _sendall
    timeleft = __send_chunk(socket, chunk, flags, timeleft, end)
  File "D:\emc\ve\lib\site-packages\gevent\_socketcommon.py", line 287, in __send_chunk
    data_sent += socket.send(chunk, flags)
  File "D:\emc\ve\lib\site-packages\gevent\_socket3.py", line 440, in send
    return _socket.socket.send(self._sock, data, flags)
ConnectionAbortedError: [WinError 10053] 連線已被您主機上的軟體中止。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 141, in run
    self.handle_error()
  File "D:\emc\ve\lib\site-packages\django\core\servers\basehttp.py", line 88, in handle_error
    super(ServerHandler, self).handle_error()
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 368, in handle_error
    self.finish_response()
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 180, in finish_response
    self.write(data)
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 274, in write
    self.send_headers()
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 331, in send_headers
    if not self.origin_server or self.client_is_modern():
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 344, in client_is_modern
    return self.environ['SERVER_PROTOCOL'].upper() != 'HTTP/0.9'
TypeError: 'NoneType' object is not subscriptable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\socketserver.py", line 639, in process_request_thread
    self.finish_request(request, client_address)
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\socketserver.py", line 361, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\socketserver.py", line 696, in __init__
    self.handle()
  File "D:\emc\ve\lib\site-packages\django\core\servers\basehttp.py", line 155, in handle
    handler.run(self.server.get_app())
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\handlers.py", line 144, in run
    self.close()
  File "C:\Users\tony.jhou\AppData\Local\Continuum\Anaconda3\lib\wsgiref\simple_server.py", line 35, in close
    self.status.split(' ',1)[0], self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'

    我刚开始接触socket编程,刚开始学习网络,我想我应该发送更多的请求头。请告诉我怎么做,谢谢。

    1 回复  |  直到 6 年前
        1
  •  1
  •   ottomeister    6 年前

    是的,你需要发送更多的数据。最小的http 1.1请求需要包含 Host 头,指定应处理请求的主机的名称或地址,请求头行后面必须跟一个空行,以告诉服务器头已完全接收。

    在http中,行尾由一对字符表示,一个 回车 以及 换行 是的。在python字符串中 \r 表示回车和 \n 表示换行符。(换行符有时称为 新线 性格,因此 \ n个 这意味着你必须写 \r\n 标记请求中每一行的结尾。

    所以,你需要的是: 

    msg = b'GET / HTTP/1.1\r\nHost: 127.0.0.1\r\n\r\n'

    决赛 \ r\n 生成指示标题结尾的空行。

    更改之后,服务器可能会报告另一个错误,因为客户端程序会立即关闭其套接字。这会中断客户端和服务器之间的连接。当服务器尝试发送其响应时,它将发现连接已断开,并且可能会对此抱怨。为了避免这种情况,请将客户更改为 s.recv 等待并从服务器读取响应 s.send() 是的。类似于: 

    while True:
  resp = s.recv(8000)
  if resp:
    print resp
  else:
    break
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