@app.get("/app")
def read_main():
    return {"message": "Hello World from main app"}


subapi = FastAPI()


@subapi.get("/sub")
def read_sub():
    return {"message": "Hello World from sub API"}

from fastapi import FastAPI, Request
from fastapi.responses import HTMLResponse
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("/items/{id}", response_class=HTMLResponse)
async def read_item(request: Request, id: str):

    name = request.args.get("name", "World")
    return f"Hello, {escape(name)} from Flask!"


app = FastAPI()


@app.get("/v2")
def read_main():
    return {"message": "Hello World"}

# 静态文件

您可以使用 `StaticFiles`从目录中自动提供静态文件。

## 使用`StaticFiles`

* 导入`StaticFiles`。
* "挂载"(Mount) 一个 `StaticFiles()` 实例到一个指定路径。

```Python hl_lines="2  6"
{!../../docs_src/static_files/tutorial001.py!}
```

/// note | "技术细节"

你也可以用 `from starlette.staticfiles import StaticFiles`。

**FastAPI** 提供了和 `starlette.staticfiles` 相同的 `fastapi.staticfiles` ，只是为了方便你，开发者。但它确实来自Starlette。

///

### 什么是"挂载"(Mounting)

	case windows.DRIVE_FIXED, windows.DRIVE_REMOVABLE, windows.DRIVE_REMOTE, windows.DRIVE_RAMDISK:
		// Recognize "fixed", "removable", "remote" and "ramdisk" drives as proper drives
		// which can be treated as an actual mount-point, rest can be ignored.
		// https://docs.microsoft.com/en-us/windows/desktop/api/fileapi/nf-fileapi-getdrivetypew
		mountPointCache.Store(path, true)
		return true
	}
	mountPointCache.Store(path, false)
	return false

// /var/run/netns/<name>. However, this pattern is not ubiquitous. Some platforms bind mount to other places. As we run
// in a pod, we cannot just access any arbitrary file they happen to bind mount in, as we don't know ahead of time where
// it might be.
//
// Instead, we rely directly on the procfs.
// This rules out two possible methods:

- Mount-utils: treat syscall.ENODEV as corrupted mount ([#126174](https://github.com/kubernetes/kubernetes/pull/126174), [@dobsonj](https://github.com/dobsonj)) [SIG Storage]

# test cases fail within Docker, and Mac + Docker isn't quite perfect.
# For more information see: https://github.com/istio/istio/pull/19322/

BUILD_WITH_CONTAINER ?= 1
CONTAINER_OPTIONS = --mount type=bind,source=/tmp,destination=/tmp --net=host

export COMMONFILES_POSTPROCESS = tools/commonfiles-postprocess.sh

ifeq ($(BUILD_WITH_CONTAINER),1)
# create phony targets for the top-level items in the repo

- Mount-utils: treat syscall.ENODEV as corrupted mount ([#126174](https://github.com/kubernetes/kubernetes/pull/126174), [@dobsonj](https://github.com/dobsonj)) [SIG Storage]

	return lockedOpenFile(path, flag, perm, syscall.LOCK_NB)
}

// LockedOpenFile - initializes a new lock and protects
// the file from concurrent access across mount points.
// This implementation doesn't support all the open
// flags and shouldn't be considered as replacement
// for os.OpenFile().
func LockedOpenFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {