How to access POST parameters into python web server using web.py module?

Question

I write a python script like this:

import web
import commands

urls = ('getprint', 'GetPrint', 'postprint', 'PostPrint')

app = web.application(urls, globals())

class GetPrint:
  def GET(self):
    return "Hello, this is GetPrint function :D"

class PostPrint:
  def POST(self):
     # I don't know how to access to post data!!!
if __name__ == "__main__": app.run()

I want to use this script as a web service and call It via a php script from another machine. My php script to call the python web service is like this:

<?php ...
    require('CallRest.inc.php');
    ...
    $status = CallAPI('GET', "http://WEBSERVICE_MACHINE_IP:PORT/".$arg);
    echo $status;
    ...
    $data = array("textbox1" => $_POST["textbox1"]);
    CallAPI('POST', 'http://WEBSERVICE_MACHINE_IP:PORT/'.$arg, $data);
... ?>

And the header file 'CallRest.inc.php' is:

<?php
// Method: POST, PUT, GET etc
// Data: array("param" => "value") ==> index.php?param=value
function CallAPI($method, $url, $data = false)
{
    $curl = curl_init();
    switch ($method)
    {
        case "POST":
            curl_setopt($curl, CURLOPT_POST, 1);
            if ($data)
                curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
            break;
        case "PUT":
            curl_setopt($curl, CURLOPT_PUT, 1);
            break;
        default:
            if ($data)
                $url = sprintf("%s?%s", $url, http_build_query($data));
    }
    // Optional Authentication:
    curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
    curl_setopt($curl, CURLOPT_USERPWD, "username:password");
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    $result = curl_exec($curl);
    curl_close($curl);
    return $result;
}       
?>

The class GetPrint work correctly but I don't know how to pass the post parameters to the python web service and how to access them into class PostPrint.

May be `request.params` is what you are looking for. Print this in your `post method`. It would print a MultiDict. — Barun Sharma, Sep 12 '15 at 14:04
@uri2x, thanks so much. I used web.input(). This method returns a `Storage` class and I can access my POST data as a dictionary. My script is completed :D — Omidreza Bagheri, Sep 13 '15 at 08:35

score 2 · Accepted Answer · answered Sep 13 '15 at 08:39

To access POST data on your Python code you should define right after your def POST(self) a variable such as data = web.input(). Then you can access the fields as shown here, For example: data.param1, data.name, and so on. So your code should look as follows:

class PostPrint:
  def POST(self):
     data = web.input()

     param1 = data.param1
     name = data.name
     ...

How to access POST parameters into python web server using web.py module?

1 Answers1