server.py

import http.server
import requests
import json

PORT = 8000
KEEP_RUNNING = True
PRIVATE_KEYS = {
    'v2_checkbox': '',
    'v2_invisible': '',
    'v3': '',
}

class MyHttpRequestHandler(http.server.BaseHTTPRequestHandler):
    
    def _set_response(self, content_type='text/html'):
        self.send_response(200)
        self.send_header('Content-type', content_type)
        self.end_headers()
    
    def do_GET(self):
        self._set_response()
        
        if self.path in ['/v2_checkbox.html', '/v2_invisible.html', '/v3.html']:
            h = open(f'templates{self.path}', 'rb')
            self.wfile.write(h.read())
        elif self.path == '/shutdown':
            global KEEP_RUNNING
            KEEP_RUNNING = False
            self.wfile.write('server is stopped'.encode('utf-8'))
            print('server is stopped')
        else:
            h = open('templates/index.html', 'rb')
            self.wfile.write(h.read())

    def do_POST(self):
        content_length = int(self.headers['Content-Length']) # <--- Gets the size of data
        post_data = self.rfile.read(content_length) # <--- Gets the data itself
        print('post data: '+ post_data.decode('utf-8'))
        
        resp_json = json.loads(post_data.decode('utf-8'))
        self._set_response(content_type='application/json')
        
        # send private key and token to google for verification
        r = requests.post('https://www.google.com/recaptcha/api/siteverify', data={
            'secret': PRIVATE_KEYS[resp_json.get('version')],
            'response': resp_json.get('token')
        })
        print(f'verfication result from google: {str(r.json())}')
        
        # return verification result from google to client
        self.wfile.write(r.content)

my_server = http.server.HTTPServer(('localhost', PORT), MyHttpRequestHandler)

def keep_running():
    return KEEP_RUNNING
    
while keep_running():
    my_server.handle_request()