API design & gRPC
REST best practices, protobuf, API versioning, and backward-compatible service contracts.
How to Mock X-RateLimit Headers in Python
This code creates a local HTTP server that mimics rate limit headers (X-RateLimit-Limit, Remaining, Reset, Update) and returns 429 responses when the limit is exceeded.
import time
import threading
from http.server import BaseHTTPRequestHandler, HTTPServer
class RateLimitHandler(BaseHTTPRequestHandler):
RATE_LIMIT = 5 # max requests allowed
WINDOW_SECONDS = 60 # per time window
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
…How to Validate Request Body JSON Against a Schema in Python
Build a lightweight schema validator to check required fields, types, string lengths, allowed values, and nested objects in a JSON request body.
import json
def validate_against_schema(data, schema, path=""):
errors = []
if not isinstance(data, dict):
errors.append(f"{path}: expected object, got {type(data).__name__}")
return errors
for field, rules in schema.items():
field_path = f"{path}.{field}" if path else field
…Verify Webhook HMAC Signatures in Python
Create and verify HMAC-SHA256 signatures for webhook payloads using Python's hmac module, protecting against tampering.
import hashlib
import hmac
import json
SECRET = b"super-secret-webhook-key"
def create_signature(payload: bytes) -> str:
return hmac.new(SECRET, payload, hashlib.sha256).hexdigest()
def verify_signature(payload: bytes, signature: str) -> bool:
expected = create_signature(payload)
return hmac.compare_dig…Browse by section
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API design & gRPC — Python code examples
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