执行顺序大致如下时序图所示。时间轴从上到下，每一列都代表交互或者代码执行的一部分。

```mermaid
sequenceDiagram

participant client as Client
participant handler as Exception handler
participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,operation: Can raise exceptions, including HTTPException
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise Exception

path_prefix      (path)      namespace prefix to isolate tenants e.g. "customer1/"
coredns_path     (path)      shared bucket DNS records, default is "/skydns"
client_cert      (path)      client cert for mTLS authentication
client_cert_key  (path)      client cert key for mTLS authentication
comment          (sentence)  optionally add a comment to this setting
```

or environment variables

```
KEY:

    protected ArraySettings arraySettings;

    protected ElevateWordSettings(final SuggestSettings settings, final Client client, final String settingsIndexName,
            final String settingsId) {
        arraySettings = new ArraySettings(settings, client, settingsIndexName, settingsId) {
            @Override
            protected String createArraySettingsIndexName(final String settingsIndexName) {

import okhttp3.Request

class PostForm {
  private val client = OkHttpClient()

  fun run() {
    val formBody =
      FormBody.Builder()
        .add("search", "Jurassic Park")
        .build()
    val request =
      Request(
        url = "https://en.wikipedia.org/w/index.php".toHttpUrl(),
        body = formBody,
      )

    client.newCall(request).execute().use { response ->

import java.io.IOException
import okhttp3.OkHttpClient
import okhttp3.Request

class SynchronousGet {
  private val client = OkHttpClient()

  fun run() {
    val request =
      Request.Builder()
        .url("https://publicobject.com/helloworld.txt")
        .build()

    client.newCall(request).execute().use { response ->
      if (!response.isSuccessful) throw IOException("Unexpected code $response")

    Create an invoice.

    This will (let's imagine) let the API user (some external developer) create an
    invoice.

    And this path operation will:

    * Send the invoice to the client.
    * Collect the money from the client.
    * Send a notification back to the API user (the external developer), as a callback.
        * At this point is that the API will somehow send a POST request to the

from docs_src.response_model.tutorial005 import app

client = TestClient(app)


def test_read_item_name():
    response = client.get("/items/bar/name")
    assert response.status_code == 200, response.text
    assert response.json() == {"name": "Bar", "description": "The Bar fighters"}


def test_read_item_public_data():
    response = client.get("/items/bar/public")
    assert response.status_code == 200, response.text

from docs_src.response_model.tutorial006 import app

client = TestClient(app)


def test_read_item_name():
    response = client.get("/items/bar/name")
    assert response.status_code == 200, response.text
    assert response.json() == {"name": "Bar", "description": "The Bar fighters"}


def test_read_item_public_data():
    response = client.get("/items/bar/public")
    assert response.status_code == 200, response.text

from fastapi.testclient import TestClient

from docs_src.behind_a_proxy.tutorial004 import app

client = TestClient(app)


def test_main():
    response = client.get("/app")
    assert response.status_code == 200
    assert response.json() == {"message": "Hello World", "root_path": "/api/v1"}


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200
    assert response.json() == {

		brokers = append(brokers, broker.String())
	}

	client, err := sarama.NewClient(brokers, sconfig)
	if err != nil {
		return err
	}

	producer, err := sarama.NewSyncProducerFromClient(client)
	if err != nil {
		return err
	}
	h.client = client
	h.producer = producer

	if len(h.client.Brokers()) > 0 {
		// Refer https://github.com/IBM/sarama/issues/1341