How to programmatically submit a POST form using IronPython

Sometimes you may want to download a web page that is a result of submitting a form that uses a POST method. The code below shows how to do that using IronPython.

1. prepare a request object, that is created for a given URI.
2. write the PARAMETERS string to the request stream.
3. retrieve the response and read from its stream.

URI = 'http://www.example.com'
PARAMETERS="lang=en&field1=1"

from System.Net import WebRequest
request = WebRequest.Create(URI)
request.ContentType = "application/x-www-form-urlencoded"
request.Method = "POST"

from System.Text import Encoding
bytes = Encoding.ASCII.GetBytes(PARAMETERS)
request.ContentLength = bytes.Length
reqStream = request.GetRequestStream()
reqStream.Write(bytes, 0, bytes.Length)
reqStream.Close()

response = request.GetResponse()
from System.IO import StreamReader
result = StreamReader(response.GetResponseStream()).ReadToEnd()
print result