main.py

from fastapi import FastAPI, Header, status 
from fastapi.exceptions import HTTPException
from typing import Optional, List
from pydantic import BaseModel

app = FastAPI()

@app.get('/')
async def read_root():
    return {"message":"Hello Enes!"}

@app.get('/greet')
async def greet_name(name:Optional[str] = "User",
                     age:int = 0) -> dict:
    return {"message":f"Hello {name}","age":age}


class BookCreateModel(BaseModel):
    title : str
    author : str

@app.post('/create_book')
async def create_book(book_data:BookCreateModel):
    return {
        "title" : book_data.title,
        "author" : book_data.author
    }

@app.get('/get_headers',status_code=500)
async def get_headers(
    accept:str = Header(None),
    content_type: str = Header(None),
    user_agent:str =Header(None),
    host:str = Header(None)
):
    request_headers = {}

    request_headers["Accept"] = accept
    request_headers["Content-Type"] = content_type
    request_headers["User-Agent"] = user_agent
    request_headers["Host"] = host


    return request_headers