[mod_python] [help]please give an input filter example ?

camge wrote:

>----- Original Message ----- 
>From: "David Fraser" <davidf at sjsoft.com>
>To: "camge" <is83070 at cis.nctu.edu.tw>
>Sent: Thursday, September 18, 2003 6:12 PM
>Subject: Re: [mod_python] [help]please give an input filter example ?
>
>
>  
>
>>>camge wrote:
>>>
>>>Hi ,
>>>
>>>   I have written an output filter, and it works fine.
>>>But I dont know how to write an input filter, there are not any examples.
>>>I have tried to write an simple input filter according to an output
>>>      
>>>
>filter.
>  
>
>>>But it always makes IE hang there.
>>>If any one can give me an example about input filter?
>>>Thanks a lot!
>>>
>>>My environment:
>>> Apache/2.0.44 (Win32)
>>> mod_ssl/2.0.44
>>> OpenSSL/0.9.7
>>> mod_python/3.0.3
>>> Python/2.2.2
>>>
>>>Best regards,
>>>camge
>>>
>>>      
>>>
>>Why don't you send your example input filter that makes IE hang?
>>
>>Thanks
>>David
>>
>>
>>    
>>
>
>Below is my simple input filter inputFilter.py:
>-------------------------------------------------------------
>def inputfilter(filter):
>    f=open('filter.log','ab')#for debug
>    data='start'
>    while data!=None:
>        try:
>            data = filter.read()
>            if data:
>                filter.write(data)
>                f.write(str(data))
>        except Exception,e:
>                f.write(str(e))
>                data=None
>     if data==None:
>        filter.close()
>     f.close()
>----------------------------------------
>httpd.conf:
>----------------------------------------
><Location /test/>
>     PythonInputFilter inputFilter MyInputFilter
>     SetInputFilter MyInputFilter
></Location>
>
>
>  
>
Excuse me rearranging your post, bottom posting makes discussion easier...

I think the problem here is that you're doing filter.read() which will 
read until an end of file, which will never happen on an input filter.
You probably need a more intelligent way of working out when to stop 
reading, e.g. for HTTP, you could read a line at a time.
What are you wanting to use the input filter for?

David