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:

   <code class="language-bash">uv init
   uv add fastapi --extra standard</code>

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:

   <code class="language-python">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</code>

4. Run FastAPI application:

   <code class="language-bash">uv run fastapi dev</code>

   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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