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
– Barun Sharma, Commented Sep 12, 2015 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
– Omidreza Bagheri, Commented Sep 13, 2015 at 8:35

uri2x · Accepted Answer · 2015-09-13 08:39:05Z

2

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
     ...

answered Sep 13, 2015 at 8:39

uri2x

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