final.py

from wsgiref.simple_server import make_server
from cgi import parse_qs
import json

def application(environ, start_response):
	
	try:
		request_body_size = int(environ.get('CONTENT_LENGTH', 0))
        except ValueError:
                request_body_size = 0

        request_body = environ['wsgi.input'].read(request_body_size)
        d = parse_qs(request_body)

        sentence = d.get('sentence', [''])[0]
	character = d.get('character', [''])[0]

        length = len(sentence)

	if len(character) != 1 :
		count = 0
	else :	
		count = sentence.count(character)	

        status = '200 OK'
        response_body = json.dumps({'length':length, 'count':count})

        response_headers = [
                ('Content-Type', 'application/json'),
                ('Content-Length', str(len(response_body)))
        ]

        start_response(status, response_headers)
        return [response_body]