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Jim Gallacher
jpg at jgassociates.ca
Fri Mar 31 07:18:05 EST 2006
Graham Dumpleton wrote:
> Remember to keep followups on mailing list. :-)
>
> A few comments on code:
>
> On 31/03/2006, at 3:35 PM, Alberto Ruiz wrote:
>
>> I added debug code in my Python script that writes to a file at
>> different stages of the script. The script executes successfully
>> without any errors, and my debug writes show up fine in the debug file.
>> In any case here is a snippet of my script:
>>
>> global DB
>> import sys
>> sys.path.append('/home/john/www/mydomain.com')
>
>
> You shouldn't append to sys.path explicitly in modules because every
> time the module is reloaded, it will be extended, thus growing and
> growing the path with the same directory.
>
>> import DBconnectpropman
>> import ZWF
>> reload(ZWF)
>
>
> Huh????
>
>> import time,random,string
>> global DATEBOX
>> from mod_python import Cookie
>>
>> def index (req,LLRuser='',LLRpw=''):
>> debugfile = open("/home/john/www/mydomain.com/debug.txt", "a")
>> debugfile.write("Begining of index function\n")
>> global R; R=req; R.content_type="text/html"
>
>
> You should not store the request object in a global variable. If you
> ever move
> to mod_python 3.X and use a multithreaded MPM it will break as multiple
> threads may execute within the same module as the same time.
>
>> cur=DBconnectpropman.DB.cursor()
>> sidrefreshing=0
>> ZWF.R=R
>> global SID;SID=''
>> global UID;UID=''
>> cookies = Cookie.get_cookies(R, Cookie.MarshalCookie,
>> secret='LLR14222222')
>> if LLRuser!='' and LLRpw!='': # login attempt
>> if string.find(LLRuser,"@")!=-1: #client login attempt
>> cur.execute("select clientid,name,password from client where
>> email='"+LLRuser+"'")
>> userrs=cur.fetchone()
>> if str(userrs)!='None':
>> LLRuser=userrs[1]
>> usertable='client'
>> else:
>> debugfile.write("It is an admin user\n")
>> cur.execute("select * from user where name='"+LLRuser+"' and
>> password='"+LLRpw+"'")
>> userrs=cur.fetchone()
>> usertable='user'
>> debugfile.write("admin user section.\n")
>> if str(userrs)!='None': #login success create session key,
>> update user
>> record, sett sid cookie
>> debugfile.write("userrs is not None.\n")
>> SID=''
>> for n in range(0,32):
>> x=random.randint(48,108)
>> if x>57:x+=8
>> if x>90:x+=6
>> SID+=chr(x)
>> cookie = Cookie.Cookie('sid', SID); cookie.expires =
>> time.time() +
>> 36000; Cookie.add_cookie(R, cookie)
>> q="update "+usertable+" set SID='"+SID+"' where
>> name='"+LLRuser+"'
>> and password='"+LLRpw+"'"
>
>
> In mod_python 2.7.X you must flush out the headers before you write any
> data
> to the response. This is why the order of your stuff is mucked up.
>
> req.send_http_header()
>
>> R.write("userq="+q)
>> cur.execute(q)
>> debugfile.write("Before calling BB.html.\n")
>> #R.write("<head><meta http-equiv='refresh'
>> content='0;url=BB.html'></head>")
>> debugfile.write("AFTER calling BB.html.\n")
>> sidrefreshing=1
>> debugfile.write("END of userrs is not None.\n")
>> debugfile.write("Before closing debug file\n")
>> debugfile.close()
>>
>>
>> I thought that maybe the meta http-equiv was the problem so I commented
>> out but I still get the error.
>>
>>
>>
>> On Fri, 2006-03-31 at 00:22 -0500, Graham Dumpleton wrote:
>>
>>> Alberto Ruiz wrote ..
>>>
>>>> I'm getting a very wierd error when I call my python script. Other
>>>> Python scripts seem to work fine but one in particular returns a 500
>>>> server error and the error does not show in the error-log under the
>>>> virtual domain that I'm working on but on the main error-log. How can
>>>> I
>>>> get additional debugging information to find out the problem?
>>>>
>>>> In the error-log I get the following:
>>>> mod_python: (Re)importing mod_python.publisher from None
>>>
>>>
>>> In mod_python 2.7.11, this message possibly doesn't mean much.
>>>
>>>> When I run my python script I get the following:
>>>>
>>>> HTTP/1.1 500 Internal Server Error
>>>> Date: Fri, 31 Mar 2006 04:46:55 GMT
>>>> Server: Apache/1.3.33 (Unix) PHP/4.4.2 mod_python/2.7.11 Python/ 2.4.2
>>>> mod_perl/1.29
>>>> Connection: close
>>>> Transfer-Encoding: chunked
>>>> Content-Type: text/html; charset=iso-8859-1
>>>>
>>>> 262
>>>> <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
>>>> <HTML><HEAD>
>>>> <TITLE>500 Internal Server Error</TITLE>
>>>> </HEAD><BODY>
>>>> <H1>Internal Server Error</H1>
>>>> The server encountered an internal error or
>>>> misconfiguration and was unable to complete
>>>> your request.<P>
>>>> Please contact the server administrator,
>>>> root at mydomain.com and inform them of the time the error occurred,
>>>> and anything you might have done that may have
>>>> caused the error.<P>
>>>> More information about this error may be available
>>>> in the server error log.<P>
>>>> <HR>
>>>> <ADDRESS>Apache/1.3.33 Server at mydomain.com Port 80</ADDRESS>
>>>> </BODY></HTML>
>>>>
>>>> 0
>>>
>>>
>>> This message in mod_python 2.7.11 with no message in error log
>>> generally means that your published function doesn't return anything.
>>>
>>> Can you post the most minimal publisher function which shows the
>>> problem?
>>>
>>> Graham
>>>
>
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