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Answer 1

+1 A:

The error means that form["id"] failed to find the key "id" in cgi.FieldStorage().

To test what keys are in the called URL, use cgi.test():

cgi.test()

Robust test CGI script, usable as main program. Writes minimal HTTP headers and formats all information provided to the script in HTML form.

EDIT: a basic test script (using the python cgi module with Linux path) is only 3 lines. Make sure you know how to run it on your system, then call it from a browser to check arguments are seen on the CGI side. You may also want to add traceback formatting with import cgitb; cgitb.enable().

#!/usr/bin/python
import cgi
cgi.test()

gimel 2008-12-21 11:26:32

Answer 2

A:

First off, you should make dictionary lookups via

possibly_none = my_dict.get( "key_name" )

Because this assigns None to the variable, if the key is not in the dict. You can then use the

if key is not None:
    do_stuff

idiom (yes, I'm a fan of null checks and defensive programming in general...). The python documentation suggests something along these lines as well.

Without digging into the code too much, I think you should reference

form.get( 'id' ).value

in order to extract the data you seem to be asking for.

Steen 2008-12-21 11:32:46

The doc shows a cgi.FieldStorage() example: if not (form.has_key("name") and form.has_key("addr")): ...

gimel 2008-12-21 11:36:58

form.get( 'id' ).value doesn't work either. I get an attribute error. I think something is wrong with the way i'm using the url because its not getting passed through

The.Anti.9 2008-12-21 11:39:02

to see what is being passed, use cgi.test()

gimel 2008-12-21 12:32:41

Answer 3

+1 A:

Have you tried printing out the value of form to make sure you're getting what you think you're getting? You do have a little problem with your code though... you should be doing form["id"].value to get the value of the item from FieldStorage. Another alternative is to just do it yourself, like so:

import os
import cgi

query_string = os.environ.get("QUERY_STRING", "")
form = cgi.parse_qs(query_string)

This should result in something like this:

{'id': ['123']}

mcrute 2008-12-24 04:24:29

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