FastAPI ボイラープレート

fastapi-boilerplate/
├── main.py                 # FastAPI application entry point
├── routers/
│   ├── checkout.py         # Checkout session endpoints
│   ├── webhook.py          # Webhook handler endpoint
│   └── customer_portal.py  # Customer portal endpoints
├── config.py               # Environment configuration
├── requirements.txt        # Python dependencies
├── .env.example            # Environment template
└── README.md

from fastapi import APIRouter, HTTPException
from dodopayments import AsyncDodoPayments
from pydantic import BaseModel
from config import settings

router = APIRouter()
dodo = AsyncDodoPayments(
    bearer_token=settings.DODO_PAYMENTS_API_KEY,
    environment=settings.DODO_PAYMENTS_ENVIRONMENT
)

class CheckoutRequest(BaseModel):
    product_id: str
    quantity: int = 1
    customer_email: str | None = None
    customer_name: str | None = None

@router.post("/checkout")
async def create_checkout(request: CheckoutRequest):
    try:
        session = await dodo.checkout_sessions.create(
            product_cart=[{
                "product_id": request.product_id,
                "quantity": request.quantity
            }],
            customer={
                "email": request.customer_email,
                "name": request.customer_name
            } if request.customer_email else None,
            return_url="http://localhost:8000/success"
        )
        return {"checkout_url": session.checkout_url, "session_id": session.session_id}
    except Exception as e:
        raise HTTPException(status_code=400, detail=str(e))

from fastapi import APIRouter, Request, HTTPException
import hmac
import hashlib
from config import settings

router = APIRouter()

def verify_webhook_signature(payload: bytes, signature: str) -> bool:
    expected = hmac.new(
        settings.DODO_PAYMENTS_WEBHOOK_KEY.encode(),
        payload,
        hashlib.sha256
    ).hexdigest()
    return hmac.compare_digest(expected, signature)

@router.post("/webhook")
async def handle_webhook(request: Request):
    payload = await request.body()
    signature = request.headers.get("webhook-signature", "")
    
    if not verify_webhook_signature(payload, signature):
        raise HTTPException(status_code=401, detail="Invalid signature")
    
    event = await request.json()
    event_type = event.get("type")
    
    match event_type:
        case "payment.succeeded":
            # Handle successful payment
            payment_id = event["data"]["payment_id"]
            print(f"Payment succeeded: {payment_id}")
            
        case "subscription.active":
            # Handle subscription activation
            subscription_id = event["data"]["subscription_id"]
            print(f"Subscription activated: {subscription_id}")
            
        case "refund.succeeded":
            # Handle refund
            refund_id = event["data"]["refund_id"]
            print(f"Refund processed: {refund_id}")
    
    return {"status": "received"}

from fastapi import APIRouter, HTTPException
from dodopayments import AsyncDodoPayments
from pydantic import BaseModel
from config import settings

router = APIRouter()
dodo = AsyncDodoPayments(
    bearer_token=settings.DODO_PAYMENTS_API_KEY,
    environment=settings.DODO_PAYMENTS_ENVIRONMENT
)

class PortalRequest(BaseModel):
    customer_id: str

@router.post("/customer-portal")
async def create_portal_session(request: PortalRequest):
    try:
        session = await dodo.customers.customer_portal.create(
            customer_id=request.customer_id,
        )
        return {"portal_url": session.link}
    except Exception as e:
        raise HTTPException(status_code=400, detail=str(e))

ngrok http 8000

https://your-ngrok-url.ngrok.io/webhook

FROM python:3.11-slim

WORKDIR /app

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

COPY . .

CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]

docker build -t fastapi-dodo .
docker run -p 8000:8000 --env-file .env fastapi-dodo