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HomeBackend DevelopmentPython TutorialPython FastAPI quickstart in uv

Python FastAPI quickstart in uv

Jan 14, 2025 pm 12:12 PM

Python FastAPI quickstart in uv

Use uv to quickly build FastAPI applications

The following steps demonstrate how to use the uv tool to quickly create a simple FastAPI application containing GET and POST requests:

  1. Initialization project:

    uv init
    uv add fastapi --extra standard
  2. Create project directories and files:

    Create a folder named /app and add two files __init__.py and main.py in it.

  3. Write FastAPI code (main.py):

    Copy the following code into the main.py file:

    from typing import Union
    from pydantic import BaseModel
    from fastapi import FastAPI
    from fastapi.middleware.cors import CORSMiddleware
    from datetime import datetime
    
    app = FastAPI()
    
    # 注意:生产环境中不要使用"*",请替换为你的允许域名
    origins = [
        "*",
    ]
    
    app.add_middleware(
        CORSMiddleware,
        allow_origins=origins,
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )
    
    class Stuff(BaseModel):
        content: str
    
    @app.get("/")
    def read_root():
        return {"Message": "Hello World! FastAPI is working."}
    
    @app.post("/getdata/")
    async def create_secret(payload: Stuff):
        with open('output_file.txt', 'a') as f:
            now = datetime.now()
            formatted_date = now.strftime("%B %d, %Y at %I:%M %p")
            f.write(formatted_date + ": " + payload.content)
            f.write('\n')
        return payload.content
  4. Run FastAPI application:

    uv run fastapi dev

    This will start the development server. You can test GET requests by accessing http://127.0.0.1:8000 and send data to the /getdata/ endpoint using POST requests.

For more FastAPI tutorials, please refer to the official documentation: https://www.php.cn/link/b446e7f68f7a79f9de9d9f9ee9b764e8

This example demonstrates a simple GET and POST API. The /getdata/ endpoint will receive the content field in the POST request and append the content to the output_file.txt file, recording the timestamp. *Please note: In a production environment, `origins = [""]` is unsafe and must be replaced with your allowed domain name list. **

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