# RESTful API FastAPI

## 安裝

pip install fastapi

## 啟動
uvicorn main:app --reload --port 8000
讓Clinet可連用IP連線
uvicorn main:app --host 0.0.0.0 --port 8000 --reload

## RESTful API GET

### RESTful API GET 無參數(Hello world)
#### GET Server (Hello world)

from fastapi import FastAPI
app = FastAPI()

@app.get("/")
def read_root():
   return {"Hello": "World"}

#### GET Client (Hello world)
http://127.0.0.1:8000

### RESTful API GET 帶數字id&參數q
#### GET Server (帶數字id&參數q)

@app.get("/items/{item_id}")
def read_item(item_id: int, q: str = None):
   return {"item_id": item_id, "q": q}


#### GET Client (帶數字id&參數q)
http://127.0.0.1:8000/items/1?q=6

### RESTful API GET (帶數字id&兩個參數相加)
#### GET Server (帶數字id&兩個參數相加)

@app.get("/itemsTest/{Item_id}")
async def create_item(Item_id: int, a: int, b: int):
    print("a+b = %d" ,a+b)
    return {"item_id": Item_id, "a+b": (a+b)}

#### GET Client (帶數字id&兩個參數相加)
http://127.0.0.1:8000/itemsTest/1?a=6&b=5

## RESTful API POST
### RESTful POST Server

from pydantic import BaseModel
from fastapi import FastAPI
app = FastAPI()
class Item(BaseModel):
    name: str
    description: str = None
    price: float
    tax: float = None

@app.post("/items/{Item}")
async def create_item(item: Item):
    print(item)
    return item


### RESTful POST Client
#### 安裝
必須pip install requests
#### POST Client Jason傳值方式

from pydantic import BaseModel
from fastapi import FastAPI
app = FastAPI()

def main(name):
    url = "http://127.0.0.1:8000/items/1"
    data = {"name": "test1", "price": 60}
    headers = {"Content-Type": "application/json"}
    response = requests.post(url, data=json.dumps(data), headers=headers)

#### 回傳結果

## FastAPI error 顯示