我正在python中使用Bottle创建一个简单的应用程序代理。
我只想更改主机，代码如下：
def get_proxy_response():
print('>>>> START')
resp = requests.request('get', 'http://127.0.0.1:18080/', headers=dict(Host='www.mysite.com'))
print('<<<< FINISH')
return resp
该代码可在我的开发笔记本电脑上使用，但是当我将代码投入生产环境（带有Python3.4.8的CentOS6）时，它挂在了请求行中，并保存了很长时间，最终引发了以下错误，然后导致504响应：
>>>> START
127.0.0.1 - - [12/Nov/2018 20:59:57] "GET /index.html HTTP/1.0" 504 1229
Traceback (most recent call last):
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 138, in run
self.finish_response()
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 180, in finish_response
self.write(data)
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 274, in write
self.send_headers()
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 332, in send_headers
self.send_preamble()
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 255, in send_preamble
('Date: %s\r\n' % format_date_time(time.time())).encode('iso-8859-1')
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 453, in _write
self.stdout.write(data)
File "/usr/lib64/python3.4/socket.py", line 398, in write
return self._sock.send(b)
BrokenPipeError: [Errno 32] Broken pipe
127.0.0.1 - - [12/Nov/2018 20:59:57] "GET /index.html HTTP/1.0" 500 59
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 43046)
Traceback (most recent call last):
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 138, in run
self.finish_response()
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 180, in finish_response
self.write(data)
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 274, in write
self.send_headers()
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 332, in send_headers
self.send_preamble()
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 255, in send_preamble
('Date: %s\r\n' % format_date_time(time.time())).encode('iso-8859-1')
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 453, in _write
self.stdout.write(data)
File "/usr/lib64/python3.4/socket.py", line 398, in write
return self._sock.send(b)
BrokenPipeError: [Errno 32] Broken pipe
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 141, in run
self.handle_error()
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 368, in handle_error
self.finish_response()
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 180, in finish_response
self.write(data)
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 274, in write
self.send_headers()
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 331, in send_headers
if not self.origin_server or self.client_is_modern():
File "/usr/lib64/python3.4/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 "/usr/lib64/python3.4/socketserver.py", line 305, in _handle_request_noblock
self.process_request(request, client_address)
File "/usr/lib64/python3.4/socketserver.py", line 331, in process_request
self.finish_request(request, client_address)
File "/usr/lib64/python3.4/socketserver.py", line 344, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/usr/lib64/python3.4/socketserver.py", line 673, in __init__
self.handle()
File "/usr/lib64/python3.4/wsgiref/simple_server.py", line 133, in handle
handler.run(self.server.get_app())
File "/usr/lib64/python3.4/wsgiref/handlers.py", line 144, in run
self.close()
File "/usr/lib64/python3.4/wsgiref/simple_server.py", line 35, in close
self.status.split(' ',1)[0], self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'
----------------------------------------
更令人困惑的是，情况取决于我设置的主机名，当我使用Host: www.mysite.com时，后端应用程序将返回正确的内容，而其他应用程序将返回简单的Site not found内容
因此，如果我将请求标头设置为headers=dict(Host='www.yoursite.com')，它按预期完成了，说明了正确的Site not found内容。