fastapi-notes-and-codes/topic27.py at main · ansh23coder/fastapi-notes-and-codes · GitHub

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"""
Rate Limiting in FastAPI-
. What is Rate Limiting?
. Using slowapi Library
. FastAPI integration
. Testing
. Interview Questions
"""

# pip install slowapi

from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse
from requests import status_codes
from slowapi import Limiter
from slowapi.errors import RateLimitExceeded
from slowapi.util import get_remote_address

app = FastAPI()
# Limiter = Limiter(key_func = get_remote_address)

limiter = Limiter(key_func=get_remote_address)
app.state.limiter = limiter

# Error Handle
@app.exception_handler(RateLimitExceeded)
def rate_limit_handler(request: Request, exc: RateLimitExceeded):
    return JSONResponse(
        status_code=429,
        content={
            "detail":"Too many requests"
        }
    )

# Rate Limiter API
@app.get("/data")
@limiter.limit("5/minutes")
async def get_data(request: Request):
   return {
       "message":"Success"
   }

"""
# Output: spam se bacha sakte hai, Ratelimiter ka use krke
INFO:     Application startup complete.
INFO:     127.0.0.1:59821 - "GET / HTTP/1.1" 404 Not Found
INFO:     127.0.0.1:59821 - "GET /docs HTTP/1.1" 200 OK
INFO:     127.0.0.1:59821 - "GET /openapi.json HTTP/1.1" 200 OK
INFO:     127.0.0.1:64600 - "GET /data HTTP/1.1" 200 OK
INFO:     127.0.0.1:64600 - "GET /data HTTP/1.1" 200 OK
INFO:     127.0.0.1:64600 - "GET /data HTTP/1.1" 200 OK
INFO:     127.0.0.1:64600 - "GET /data HTTP/1.1" 200 OK
INFO:     127.0.0.1:64600 - "GET /data HTTP/1.1" 200 OK
INFO:     127.0.0.1:64600 - "GET /data HTTP/1.1" 429 Too Many Requests

"""