#getpost.py
#This Servlet prints the Contents
#of the POST data when a file is Uploaded from
#the client using a HTML FORM
#This helps in understanding how file uploads
#take place

from javax import servlet
from javax.servlet import http
from java.io import *
from java.util import *
from java.lang import *
import string

#Define Server IP address and Port number
SERVER_IP = "127.0.0.1"
SERVER_PORT = "8080"


class getpost (http.HttpServlet):

    def doGet(self, req, res):

        #Send a File Upload Page to the client

        res.setContentType("text/html")
        toclient = res.getWriter()

        toclient.println(
        "<FORM ACTION=http://" + SERVER_IP + ":" + SERVER_PORT + req.getRequestURI()
        + " ENCTYPE=multipart/form-data METHOD=POST>"
        """Enter the name of the File <INPUT TYPE=FILE NAME=file> <BR>
        <INPUT TYPE=SUBMIT value = "Upload">
        </FORM>
        """)

        
    def doPost (self, req, res):

        res.setContentType("text/html")
        toclient = res.getWriter()

        toclient.println("Printing Request Headers:<BR><BR>")

        names = req.getHeaderNames()

        #Get all header names

        while names.hasMoreElements():

             #Get the value of each Header and send it
             #to the browser

             name =names.nextElement()
             values = req.getHeaders(name)

             if values!= None:

                 while (values.hasMoreElements()):

                        value = values.nextElement()
                        toclient.println(name + ": " + value + "<BR>")

        toclient.println("<BR>Printing Stream contents:<BR><BR>")

        #Now printing the Stream contents

        input = BufferedReader(InputStreamReader(req.getInputStream()))

        read_data = input.readLine()

        #Print Start of the Stream header
        toclient.println("Start of Stream = ")
        toclient.println(read_data + "<BR><BR>")
        

        #Now print POST data

        while ( read_data != None ):

            toclient.println (read_data)
            last_read_line = read_data
            read_data = input.readLine()

        #Print end of Stream
        toclient.println ( "<BR><BR>End of Stream  = " + last_read_line)

        #This is equal to the Start of stream header