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Python Code Samples

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4 matches
API design & gRPC easy

How to Validate JWT Claims (exp, iss, aud) in Python

This code demonstrates how to decode and validate a JWT's essential claims—expiration (exp), issuer (iss), and audience (aud)—using the PyJWT library, returning clear error messages for common validation failures.

jwt authentication security
Python 
import jwt
from datetime import datetime, timezone, timedelta

SECRET = "mock-secret"

def validate_token(token, expected_iss, expected_aud):
    try:
        decoded = jwt.decode(
            token,
            SECRET,
            algorithms=["HS256"],
            options={"require": ["exp", "iss", "aud"]},
         …
12 0 Open
API design & gRPC easy

How to Validate a JWT Signature in Python with a Mock Secret

Validates a JWT's signature using a mock secret, decoding and handling expired or invalid tokens gracefully.

jwt authentication security
Python 
import jwt
import time

SECRET = "mock_secret_key_123"

def validate_token(token):
    try:
        payload = jwt.decode(token, SECRET, algorithms=["HS256"])
        return f"Valid token. Payload: {payload}"
    except jwt.ExpiredSignatureError:
        return "Token expired"
    except jwt.InvalidTokenError:
        …
12 0 Open
Auth & security at scale easy

Build a Mock OIDC Userinfo Endpoint in Python with Flask

Create a local mock OIDC userinfo endpoint in Flask that returns a standard JSON user payload, ideal for testing auth flows without a real identity provider.

flask oidc userinfo
Python 
from flask import Flask, jsonify

app = Flask(__name__)

@app.route("/userinfo")
def userinfo():
    mock_user = {
        "sub": "1234567890",
        "name": "John Doe",
        "email": "john@example.com",
        "email_verified": True,
        "groups": ["admin", "dev"]
    }
    return jsonify(mock_user)

if __n…
13 0 Open
Auth & security at scale easy

How to Revoke Tokens with a Blacklist Set in Python

A minimal TokenBlacklist class using a Python set to revoke, batch-revoke, check, and remove expired tokens for simple token invalidation.

jwt blacklist authentication
Python 
import time

class TokenBlacklist:
    def __init__(self):
        self.blacklisted_tokens = set()

    def revoke(self, token):
        self.blacklisted_tokens.add(token)
        print(f"Token {token} revoked. Blacklist size: {len(self.blacklisted_tokens)}")

    def revoke_batch(self, tokens):
        before = len(s…
13 0 Open

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