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Re: HTTPserver: how to access variables of a higher class?

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On 04/05/2013 01:54 PM, Dave Angel wrote:
> On 04/05/2013 07:02 AM, Tom P wrote:
>> First, here's a sample test program:
>> <code>
>> import sys
>> from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
>>
>> class MyRequestHandler(BaseHTTPRequestHandler, object):
>>      def do_GET(self):
>>          top_self = super(MyRequestHandler, self) # try to access
>> MyWebServer instance
>>          self.send_response(200)
>>          self.send_header('Content-type',    'text/html')
>>          self.end_headers()
>>          self.wfile.write("thanks for trying, but I'd like to get at
>> self.foo and self.bar")
>>          return
>>
>> class MyWebServer(object):
>>      def __init__(self):
>>          self.foo = "foo"  # these are what I want to access from inside
>> do_GET
>>          self.bar = "bar"
>>          self.httpd = HTTPServer(('127.0.0.1', 8000), MyRequestHandler)
>>          sa = self.httpd.socket.getsockname()
>>          print "Serving HTTP on", sa[0], "port", sa[1], "..."
>>
>>      def runIt(self):
>>          self.httpd.serve_forever()
>>
>> server = MyWebServer()
>> server.runIt()
>>
>> </code>
>>
>> I want to access the foo and bar variables from do_GET, but I can't
>> figure out how. I suppose this is something to do with new-style vs.
>> old-style classes, but I lost for a solution.
>
> It'd have been good to tell us that this was on Python 2.7
>
> Is MyWebServer class intended to have exactly one instance?  If so, you
> could save the instance as a class attribute, and trivially access it
> from outside the class.
>
> If it might have more than one instance, then we'd need to know more
> about the class BaseHTTPServer.HTTPServer,  From a quick glance at the
> docs, it looks like you get an attribute called server.  So inside the
> do_GET() method, you should be able to access   self.server.foo   and
> self.server.bar
>
> See http://docs.python.org/2/library/basehttpserver.html
>
That doesn't work. Maybe you mean something that I'm missing?
Setting a breakpoint in do_GET:
Pdb) b 7
Breakpoint 1 at /home/tom/Desktop/tidy/Python/webserver/simpleWebserver.py:7
(Pdb) c
Serving HTTP on 127.0.0.1 port 8000 ...
 > /home/tom/Desktop/tidy/Python/webserver/simpleWebserver.py(7)do_GET()
-> self.send_response(200)
(Pdb) self
<__main__.MyRequestHandler instance at 0x7ff20dde3bd8>
(Pdb) self.server
<BaseHTTPServer.HTTPServer instance at 0x7ff20dde3830>
(Pdb) dir(self.server)
['RequestHandlerClass', '_BaseServer__is_shut_down', 
'_BaseServer__shutdown_request', '__doc__', '__init__', '__module__', 
'_handle_request_noblock', 'address_family', 'allow_reuse_address', 
'close_request', 'fileno', 'finish_request', 'get_request', 
'handle_error', 'handle_request', 'handle_timeout', 'process_request', 
'request_queue_size', 'serve_forever', 'server_activate', 
'server_address', 'server_bind', 'server_close', 'server_name', 
'server_port', 'shutdown', 'shutdown_request', 'socket', 'socket_type', 
'timeout', 'verify_request']
(Pdb) self.server.foo
*** AttributeError: HTTPServer instance has no attribute 'foo'

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HTTPserver: how to access variables of a higher class? Tom P <werotizy@freent.dd> - 2013-04-05 13:02 +0200
  Re: HTTPserver: how to access variables of a higher class? Dave Angel <davea@davea.name> - 2013-04-05 07:54 -0400
    Re: HTTPserver: how to access variables of a higher class? Tom P <werotizy@freent.dd> - 2013-04-05 15:26 +0200
    Re: HTTPserver: how to access variables of a higher class? Tom P <werotizy@freent.dd> - 2013-04-05 23:41 +0200
      Re: HTTPserver: how to access variables of a higher class? Dave Angel <davea@davea.name> - 2013-04-05 23:19 -0400
  Re: HTTPserver: how to access variables of a higher class? Dylan Evans <dylan@dje.me> - 2013-04-05 22:27 +1000
    Re: HTTPserver: how to access variables of a higher class? Tom P <werotizy@freent.dd> - 2013-04-05 15:21 +0200
    Re: HTTPserver: how to access variables of a higher class? Tom P <werotizy@freent.dd> - 2013-04-06 17:05 +0200
      Re: HTTPserver: how to access variables of a higher class? Dylan Evans <dylan@dje.me> - 2013-04-07 11:51 +1000
  Re: The SOLUTION HTTPserver: how to access variables of a higher class Tom P <werotizy@freent.dd> - 2013-04-06 23:38 +0200

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