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社区首页 >问答首页 >使用python3套接字连接到web服务器

问使用python3套接字连接到web服务器
EN

Stack Overflow用户
提问于 2018-07-07 16:16:06
回答 1查看 302关注 0票数 0

我正在运行Python3，在本地主机上运行Django，并监听http://127.0.0.1:8000/

我想通过不同的方式来测试它，比如request和socket

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

# <Response [200]>

它运行良好，而且

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

现在改为使用requests连接到socket

代码语言：javascript
复制
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，我得到了以下异常

代码语言：javascript
复制
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'

我是socket编程的新手，刚刚开始学习网络，我想也许我应该发送更多的请求头。请告诉我怎么做，谢谢。

networking
python-sockets
EN

回答 1

Stack Overflow用户

回答已采纳

发布于 2018-07-08 06:45:53

是的，您需要发送更多数据。一个最小的HTTP1.1请求需要第二行，其中包含一个Host标头，指定应该处理请求的主机的名称或地址，并且请求标头行后面必须跟一个空行，以告诉服务器标头已经完全收到。

在HTTP中，行尾由一对字符、一个回车符和一个换行符表示。在Python字符串中，\r表示回车符，\n表示换行符。(换行符有时称为换行符，因此称为\n代码。)这意味着您必须编写\r\n来标记请求中每一行的结束。

所以，你需要的是：

代码语言：javascript
复制
msg = b'GET / HTTP/1.1\r\nHost: 127.0.0.1\r\n\r\n'

最后的\r\n生成指示标头结束的空行。

在您进行更改之后，您的服务器可能会报告一个不同的错误，因为您的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。当服务器试图发送它的响应时，它会发现连接已经断开，它可能会对此报错。要避免这种情况，请将客户端更改为使用s.recv，以便在执行s.send()之后等待并读取来自服务器的响应。类似于：

代码语言：javascript
复制
while True:
  resp = s.recv(8000)
  if resp:
    print resp
  else:
    break
票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/51221285

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