adds
- basic login button on website frontend - index.html hosting using python - posting google oauth token from javascript on client side - passing token id to python hoster - verifying token, and returning a string to client
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client_secret.json
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client_secret.json
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{"web":{"client_id":"377787187748-shuvi4iq5bi4gdet6q3ioataimobs4lh.apps.googleusercontent.com","project_id":"calendarwatch-1584185874753","auth_uri":"https://accounts.google.com/o/oauth2/auth","token_uri":"https://oauth2.googleapis.com/token","auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs","client_secret":"Hu_YWmKsVKUcLwyeINYzdKfZ","redirect_uris":["http://localhost:1234"],"javascript_origins":["http://raphael.maenle.net","https://raphael.maenle.net"]}}
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51
index.html
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index.html
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<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
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<meta content="utf-8" http-equiv="encoding">
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<html lang="en" itemscope itemtype="http://schema.org/Article">
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<head>
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<!-- BEGIN Pre-requisites -->
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<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js">
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</script>
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<script src="https://apis.google.com/js/client:platform.js?onload=start" async defer>
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</script>
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<!-- END Pre-requisites -->
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<meta name="google-signin-scope" content="profile email">
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<meta name="google-signin-client_id"
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content="377787187748-shuvi4iq5bi4gdet6q3ioataimobs4lh.apps.googleusercontent.com">
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<script src="https://apis.google.com/js/platform.js" async defer></script>
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</head>
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<body>
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<div class="g-signin2" data-onsuccess="onSignIn" data-theme="dark"></div>
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<script>
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function onSignIn(googleUser) {
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// Useful data for your client-side scripts:
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var profile = googleUser.getBasicProfile();
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console.log("ID: " + profile.getId()); // Don't send this directly to your server!
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console.log('Full Name: ' + profile.getName());
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console.log('Given Name: ' + profile.getGivenName());
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console.log('Family Name: ' + profile.getFamilyName());
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console.log("Image URL: " + profile.getImageUrl());
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console.log("Email: " + profile.getEmail());
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// The ID token you need to pass to your backend:
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var id_token = googleUser.getAuthResponse().id_token;
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console.log("ID Token: " + id_token);
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// Send the code to the server
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var xhr = new XMLHttpRequest();
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xhr.open('POST', 'http://192.168.68.103.xip.io:1234/website.py');
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xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
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xhr.onload = function() {
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console.log('Signed in as: ' + xhr.responseText);
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};
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xhr.send(id_token);
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}
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</script>
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</body>
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</html>
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index.js
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index.js
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const express = require('express')
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const path = require('path')
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const PORT = process.env.PORT || 1234
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express()
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.use(express.static(path.join(__dirname,'public')))
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.get('/', (req, res) => res.render('index'))
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.listen(PORT, () => console.log(`Listening on ${ PORT }`))
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80
website.py
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website.py
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from google.oauth2 import id_token
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from google.auth.transport import requests
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from http.server import HTTPServer, SimpleHTTPRequestHandler, BaseHTTPRequestHandler
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import socketserver
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import logging
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import json
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Handler = SimpleHTTPRequestHandler
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class S(BaseHTTPRequestHandler):
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def _set_headers(self):
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self.send_response(200)
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self.send_header('Content-type', 'text/html')
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self.end_headers()
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def do_GET(self):
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self._set_headers()
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f = open("index.html", "r")
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self.wfile.write(f.read().encode('utf-8'))
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def do_HEAD(self):
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self._set_headers()
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def do_POST(self):
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self._set_headers()
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print("in post method")
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self.data_string = self.rfile.read(int(self.headers['Content-Length']))
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print('checking client id')
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checkClientId(self.data_string)
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self.send_response(200)
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self.end_headers()
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self.wfile.write("Hello".encode('utf-8'))
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return
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def run(server_class=HTTPServer, handler_class=S, port=1234):
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logging.basicConfig(level=logging.INFO)
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server_address = ('', port)
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with socketserver.TCPServer(("", port), handler_class) as httpd:
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print("serving at port", port)
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httpd.serve_forever()
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# (Receive token by HTTPS POST)
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def checkClientId(token):
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try:
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with open('client_secret.json', 'r') as json_file:
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clientSecret = json.load(json_file)
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CLIENT_ID = clientSecret["web"]["client_id"]
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# Specify the CLIENT_ID of the app that accesses the backend:
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idinfo = id_token.verify_oauth2_token(token, requests.Request(), CLIENT_ID)
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# Or, if multiple clients access the backend server:
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# idinfo = id_token.verify_oauth2_token(token, requests.Request())
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# if idinfo['aud'] not in [CLIENT_ID_1, CLIENT_ID_2, CLIENT_ID_3]:
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# raise ValueError('Could not verify audience.')
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if idinfo['iss'] not in ['accounts.google.com', 'https://accounts.google.com']:
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raise ValueError('Wrong issuer.')
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# If auth request is from a G Suite domain:
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# if idinfo['hd'] != GSUITE_DOMAIN_NAME:
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# raise ValueError('Wrong hosted domain.')
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# ID token is valid. Get the user's Google Account ID from the decoded token.
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userid = idinfo['sub']
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print(f"valid user id: {userid}")
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except ValueError:
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# ID token is invalid
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print('invalid token')
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pass
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if __name__ == '__main__':
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from sys import argv
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if len(argv) == 2:
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run(port=int(argv[1]))
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else:
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run()
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