fastapi

from fastapi import FastAPI, HTTPException, Depends
from pydantic import BaseModel
from datetime import datetime

app = FastAPI(title="My API", version="1.0.0")

# Request/Response models
class ItemCreate(BaseModel):
    name: str
    price: float
    description: str | None = None

class ItemResponse(ItemCreate):
    id: int
    created_at: datetime

# Dependency example
async def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()

# Route handlers
@app.post("/items/", response_model=ItemResponse, status_code=201)
async def create_item(item: ItemCreate, db=Depends(get_db)):
    db_item = Item(**item.model_dump())
    db.add(db_item)
    db.commit()
    return db_item

@app.get("/items/{item_id}", response_model=ItemResponse)
async def get_item(item_id: int, db=Depends(get_db)):
    item = db.query(Item).get(item_id)
    if not item:
        raise HTTPException(status_code=404, detail="Item not found")
    return item

# Run the server
uvicorn main:app --reload

# Interactive docs available at http://localhost:8000/docs

from fastapi.security import OAuth2PasswordBearer

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

@app.get("/users/me")
async def read_current_user(token: str = Depends(oauth2_scheme)):
    user = verify_token(token)
    if not user:
        raise HTTPException(status_code=401, detail="Invalid token")
    return user