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[Python] FastAPI 사용해보기 본문

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[Python] FastAPI 사용해보기

damda_di 2023. 1. 5. 15:16

FastAPI를 사용하기 위해서 

1. cmd 창에

pip install fastapi
pip install uvicorn

를 입력해 라이브러리를 설치해준다.

2. Path 환경 변수에 uvicorn 경로를 추가해준다.

 

Path에 uvicorn 경로를 추가해준다.

 

uvicorn.exe 설치되어있는 경로

c드라이브 > 사용자 > AppData\Roaming\Python\Python39\Scripts

경로에 설치되어있다.

 

내 컴퓨터에 설치되어있던 경로

C:\Users\PC-13\AppData\Roaming\Python\Python39\Scripts

 

예제 - 01

main.py

from fastapi import FastAPI,Form ,HtmlResponse, Request
import uvicorn
from fastapi.staticfiles import StaticFiles 
from fastapi.templating import Jinja2Templates 

app = FastAPI()
app.mount("/static", StaticFiles(directory="static"), name="static")
templates = Jinja2Templates(directory="templates") 

@app.get("/")
async def root():
    return {"message" : "Hello World"}

@app.get("/forw", response_class=HtmlResponse)
async def forw(request : request):
    return templates.TemplateResponse("forw.html", {"request": request, "id":id})  


@app.get("/param")
async def param(a):
    return {"param":a}

@app.post("/post")
async def post(b: str = Form()):
    return {"post" : b}


if __name__ == "__main__":
    uvicorn.run(app, host="localhost", port=8000)

 

post.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="http://localhost:8000/post" method="post">
<input type="text" name="b" value="888" />
<input type="submit" value="포스트로보냄" />

</form>

</body>
</html>

 

localhost:8000/post를 검색하면 get방식으로 요청되기 때문에 Method Not Allowed가 뜬다.

 

예제 - 02

 

main.py

from fastapi import FastAPI,Request
import uvicorn
import pymssql
from starlette.responses import HTMLResponse
from starlette.staticfiles import StaticFiles
from starlette.templating import Jinja2Templates


app = FastAPI()
app.mount("/static", StaticFiles(directory="static"), name="static")
templates = Jinja2Templates(directory="templates")

@app.get("/")
async def root():
    return {"message": "Hello World"}

@app.get("/forw", response_class=HTMLResponse)
async def forw(request: Request):
    a = "홍길동"
    b = ["이명박","김경수","김기춘"]
    c = [
            {"e_id" : "1", "e_name" : "1", "sex" : "1", "addr" : "1"},
            {"e_id" : "2", "e_name" : "2", "sex" : "2", "addr" : "2"},
            {"e_id" : "3", "e_name" : "3", "sex" : "3", "addr" : "3"},
            {"e_id" : "4", "e_name" : "4", "sex" : "4", "addr" : "4"}
        ]
    return templates.TemplateResponse("forw.html", {"request": request, "id":"1", "a":a, "b":b, "c":c})


@app.get("/emp", response_class=HTMLResponse)
async def emp(request: Request):
    conn = pymssql.connect(server='192.168.145.16', database='PYTHON', user='sa', password='python') 
    cursor = conn.cursor() # 쿼리 생성과 결과 조회를 위해 사용
    cursor.execute('SELECT * FROM EMP')
    list = cursor.fetchall()
    
    return templates.TemplateResponse("emp.html", {"request": request, "list": list })

@app.get("/param")
async def param(a):
    return {"param": a}

if __name__ == "__main__":
    uvicorn.run(app, host="localhost", port=8000)

 

forw.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
FORWARD
<h1> Item ID : {{ id }} </h1> 
<h1> Item a : {{ a }} </h1> 
<h1> Item b : {{ b }} </h1> 

<ul id='b' style="list-style: none;">
    {% for bitem in b %}
        <li>
          <h3> {{bitem}} </h3>
       </li>
    {% endfor %}
</ul>


        
<table border='1' style="text-align: center;">
	<tr style="font-weight: bold;">
		<td>사번</td>
		<td>이름</td>
		<td>성별</td>
		<td>주소</td>
	</tr>
	 {% for item in c %}
	<tr>
		<td>{{item.e_id}}</td>
		<td>{{item.e_name}}</td>
		<td>{{item.sex}}</td>
		<td>{{item.addr}}</td>
	</tr>
	  {% endfor %}
</table>
</body>
</html>

 

emp.html

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
FORWARD
<h1> Item ID : {{ id }} </h1> 
<h1> Item a : {{ a }} </h1> 
<h1> Item b : {{ b }} </h1> 

<ul id='b' style="list-style: none;">
    {% for bitem in b %}
        <li>
          <h3> {{bitem}} </h3>
       </li>
    {% endfor %}
</ul>


        
<table border='1' style="text-align: center;">
	<tr style="font-weight: bold;">
		<td>사번</td>
		<td>이름</td>
		<td>성별</td>
		<td>주소</td>
	</tr>
	 {% for item in c %}
	<tr>
		<td>{{item.e_id}}</td>
		<td>{{item.e_name}}</td>
		<td>{{item.sex}}</td>
		<td>{{item.addr}}</td>
	</tr>
	  {% endfor %}
</table>
</body>
</html>
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