How to get POST parameters with Python?

Question

I would like to call my Python script from different location ( FIY: I will call it later from my paypal registration process).

My configuration: I am running my website on AmazonWebServices. IIS8. Python3

I am calling to my python with this simple HTML file:

<form role="form" action="http://www.mywebsite.nz/cgi-bin/mypythonfile.py" method="post">

    <label for="person_name">Person name</label>                    
    <input id="person_name" type="text" name="person_name">

    <label for="email_address">Email address</label>                    
    <input id="email_address" type="text" name="email_address">

    <button id="submit_button" type="submit" >submit</button>

</form>

Here is what I have in my mypythonfile.py:

import cgi, cgitb


#Create instance of FieldStorage
form = cgi.FieldStorage() 
cgitb.enable()


#Here I will collect all parameters
variable = ""
value = ""
allFields = ""
for key in form.keys():
    variable = str(key)
    value = str(form.getvalue(variable))
    allFields += variable + ":" + value + "   "

print(allFields)

But the result I get is with empty values:

<email_address>:<None>  <person_name>:<None>

p.s. When calling the .py from the same place where the HTML file is - everything works perfectly. The problem happens when I call the .py file from an external HTML.

How can I fix it? (maybe it is some sort of configuration I have to add e.g. to IIS?)

skywalker · Accepted Answer · 2021-07-23 13:06:04Z

3

You are sending it as POST. To obtain POST variables, try replacing:

form = cgi.FieldStorage()

with this:

form = cgi.FieldStorage(environ="post")

Or you can try this:

import sys, urllib
query_string = sys.stdin.read()
multiform = urllib.parse.parse_qs(query_string)

And now you can use this:

multiform["email_address"]

edited Jul 23, 2021 at 13:06

answered Aug 15, 2015 at 8:28

skywalker

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14 Comments

skywalker Over a year ago

The cgitb is good for debugging, but you have not started it, you need to do: cgitb.enable()

skywalker Over a year ago

Try using a library for this. Follow this answer: stackoverflow.com/a/464977/4898487

skywalker Over a year ago

Check if you are submitting right fields and retrieving right fields.

skywalker Over a year ago

Sorry. But maybe you are right, I have once read that some servers have it blocked.

skywalker Over a year ago

I am using apache but I have found this: stackoverflow.com/questions/3472429/…. But it's for iis6 and iis7, I hope this will work for iis8 too.

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