> For the complete documentation index, see [llms.txt](https://dinoin.gitbook.io/shi-py-bu-shi-pi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dinoin.gitbook.io/shi-py-bu-shi-pi/fastapi/cors.md).

# CORS

跨域設置

```python
from fastapi.middleware.cors import CORSMiddleware

app = FastAPI()

app.add_middleware(
  CORSMiddleware,
  allow_origins=['*'],
  allow_credentials=True,
  allow_methods=["*"],
  allow_headers=["*"],
)
```

> 參考 <https://fastapi.tiangolo.com/zh/tutorial/cors/>