Helló
világ

def test_api(client: TestClient):
    response = client.get("/users/john")
    assert response.status_code == 200, response.text

  void setUp() {
    eventBus = new EventBus("for benchmarking purposes");
    eventBus.register(this);
  }

  @Benchmark
  void postStrings(int reps) {
    for (int i = 0; i < reps; i++) {
      eventBus.post("hello there");
    }
  }

  @Subscribe
  public void handleStrings(String string) {
    // Nothing to do here.
  }

	testCases := []struct {
		content       string
		expectedErr   bool
		expectedValue string
	}{
		{
			"value\n",
			false,
			"value",
		},
		{
			" \t\n Hello, Gophers \n\t\r\n",
			false,
			"Hello, Gophers",
		},
	}

	for _, testCase := range testCases {
		testCase := testCase
		t.Run("", func(t *testing.T) {
			tmpfile, err := os.CreateTemp("", "testfile")
			if err != nil {

def test_api(client: TestClient):
    response = client.get("/users/john")
    assert response.status_code == 200, response.text

from fastapi import FastAPI
from fastapi.middleware.httpsredirect import HTTPSRedirectMiddleware

app = FastAPI()

app.add_middleware(HTTPSRedirectMiddleware)


@app.get("/")
async def main():

from typing import Union


def say_hi(name: Union[str, None] = None):
    if name is not None:
        print(f"Hey {name}!")
    else:

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

wäre die Response etwa:

```JSON
{
    "message": "Hello World",
    "root_path": "/api/v1"
}
```

### Festlegen des `root_path` in der FastAPI-Anwendung

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

返回的响应如下：

```JSON
{
    "message": "Hello World",
    "root_path": "/api/v1"
}
```

### 在 FastAPI 应用里设置 `root_path`

还有一种方案，如果不能提供 `--root-path` 或等效的命令行选项，则在创建 FastAPI 应用时要设置 `root_path` 参数。

```Python hl_lines="3"

from fastapi import FastAPI, Response

app = FastAPI()


@app.get("/headers-and-object/")
def get_headers(response: Response):
    response.headers["X-Cat-Dog"] = "alone in the world"