Você também define de alguma maneira em quais **momentos** a sua aplicação mandará essas requisições ou eventos.

E os **seus usuários** definem de alguma forma (em algum painel por exemplo) a **URL** que a sua aplicação deve enviar essas requisições.

from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel, HttpUrl

app = FastAPI()


class Image(BaseModel):
    url: HttpUrl
    name: str


class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    price: float
    tax: Union[float, None] = None
    tags: set[str] = set()
    image: Union[Image, None] = None


@app.put("/items/{item_id}")

}

// getObjectLocation gets the fully qualified URL of an object.
func getObjectLocation(r *http.Request, domains []string, bucket, object string) string {
	// unit tests do not have host set.
	if r.Host == "" {
		return path.Clean(r.URL.Path)
	}
	proto := handlers.GetSourceScheme(r)
	if proto == "" {
		proto = getURLScheme(globalIsTLS)
	}
	u := &url.URL{
		Host:   r.Host,

  </parent>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven.t03</groupId>
  <artifactId>p1</artifactId>
  <packaging>pom</packaging>
  <name>p1</name>
  <version>1.0</version>
  <scm>
    <url>scm-url</url>
  </scm>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-antrun-plugin</artifactId>
        <configuration>
          <tasks><echo>${project.parent.basedir}</echo></tasks>

  <version>0.1</version>
  <packaging>pom</packaging>

  <!--
  NOTE: This extends the test to check an edge case of URL adjustment which must not error out during inheritance
  if the child misses the artifactId (as to be reported by validation).
  -->
  <url>https://maven.apache.org/</url>

    start_date: datetime


@app.webhooks.post("new-subscription")
def new_subscription(body: Subscription):
    """
    When a new user subscribes to your service we'll send you a POST request with this
    data to the URL that you register for the event `new-subscription` in the dashboard.
    """


@app.get("/users/")
def read_users():

    A test plugin to assist testing of Maven core.
  </description>
  <inceptionYear>2009</inceptionYear>

  <distributionManagement>
    <repository>
      <id>maven-core-it</id>
      <url>file:///${basedir}/repo</url>
    </repository>
  </distributionManagement>

  <properties>
    <maven.test.skip>true</maven.test.skip>
    <updateReleaseInfo>true</updateReleaseInfo>
  </properties>

  <dependencies>

    A test plugin to assist testing of Maven core.
  </description>
  <inceptionYear>2009</inceptionYear>

  <distributionManagement>
    <repository>
      <id>maven-core-it</id>
      <url>file:///${basedir}/repo</url>
    </repository>
  </distributionManagement>

  <properties>
    <maven.test.skip>true</maven.test.skip>
    <updateReleaseInfo>true</updateReleaseInfo>
  </properties>

  <dependencies>

当你使用 `Query` 显式地定义查询参数时，你还可以声明它去接收一组值，或换句话来说，接收多个值。

例如，要声明一个可在 URL 中出现多次的查询参数 `q`，你可以这样写：

{* ../../docs_src/query_params_str_validations/tutorial011.py hl[9] *}

然后，输入如下网址：

```
http://localhost:8000/items/?q=foo&q=bar
```

你会在*路径操作函数*的*函数参数* `q` 中以一个 Python `list` 的形式接收到*查询参数* `q` 的多个值（`foo` 和 `bar`）。

因此，该 URL 的响应将会是：

```JSON
{
  "q": [
    "foo",
    "bar"
  ]

    model_config = {"extra": "allow"}


class Contact(BaseModelWithConfig):
    name: Optional[str] = None
    url: Optional[AnyUrl] = None
    email: Optional[EmailStr] = None


class License(BaseModelWithConfig):
    name: str
    identifier: Optional[str] = None
    url: Optional[AnyUrl] = None


class Info(BaseModelWithConfig):
    title: str
    summary: Optional[str] = None