Ancak `user-agent` gibi bir değişken adı Python'da geçersizdir.

Bu yüzden, default olarak `Header`, header'ları almak ve dokümante etmek için parametre adlarındaki underscore (`_`) karakterlerini hyphen (`-`) ile dönüştürür.

Ayrıca HTTP header'ları büyük/küçük harfe duyarlı değildir; dolayısıyla onları standart Python stiliyle (diğer adıyla "snake_case") tanımlayabilirsiniz.

app = FastAPI(
    title="ChimichangApp",
    description=description,
    summary="Deadpool's favorite app. Nuff said.",
    version="0.0.1",
    terms_of_service="http://example.com/terms/",
    contact={
        "name": "Deadpoolio the Amazing",
        "url": "http://x-force.example.com/contact/",
        "email": "******@****.***",
    },
    license_info={
        "name": "Apache 2.0",

specific language governing permissions and limitations
under the License.
-->

<project
  xmlns="http://maven.apache.org/POM/4.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example.group</groupId>
  <artifactId>testinvalidpom</artifactId>

import org.codelibs.fess.crawler.client.ftp.FtpClient;
import org.codelibs.fess.crawler.client.http.HcHttpClient;
import org.codelibs.fess.crawler.client.http.config.CredentialsConfig;
import org.codelibs.fess.crawler.client.http.config.CredentialsConfig.CredentialsType;
import org.codelibs.fess.crawler.client.http.config.WebAuthenticationConfig;
import org.codelibs.fess.crawler.client.http.config.WebAuthenticationConfig.AuthSchemeType;

      <name>Human Readable Name for this Mirror.</name>
      <url>http://my.repository.com/repo/path</url>
    </mirror>
    -->
    <mirror>
      <id>maven-default-http-blocker</id>
      <mirrorOf>external:http:*</mirrorOf>
      <name>Pseudo repository to mirror external repositories initially using HTTP.</name>
      <url>http://0.0.0.0/</url>
      <blocked>true</blocked>
    </mirror>
  </mirrors>

你可能需要告诉客户端：

- 客户端没有执行该操作的权限
- 客户端没有访问该资源的权限
- 客户端要访问的项目不存在
- 等等

遇到这些情况时，通常要返回 **4XX**（400 至 499）**HTTP 状态码**。

这与表示请求成功的 **2XX**（200 至 299）HTTP 状态码类似。那些“200”状态码表示某种程度上的“成功”。

而 **4XX** 状态码表示客户端发生了错误。

大家都知道**「404 Not Found」**错误，还有调侃这个错误的笑话吧？

## 使用 `HTTPException` { #use-httpexception }

向客户端返回 HTTP 错误响应，可以使用 `HTTPException`。

### 导入 `HTTPException` { #import-httpexception }

Теперь запустите команду `fastapi`:

<div class="termy">

```console
$ fastapi dev

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

</div>

И откройте документацию по адресу [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

Вы увидите автоматическую документацию API для основного приложения, включающую только его собственные _операции пути_:

specific language governing permissions and limitations
under the License.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven</artifactId>

import okhttp3.ResponseBody.Companion.asResponseBody
import okhttp3.internal.connection.Exchange
import okhttp3.internal.http.HTTP_PERM_REDIRECT
import okhttp3.internal.http.HTTP_TEMP_REDIRECT
import okhttp3.internal.http.parseChallenges
import okio.Buffer
import okio.Socket

/**
 * An HTTP response. Instances of this class are not immutable: the response body is a one-shot

specific language governing permissions and limitations
under the License.
-->

<model xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.apache.maven</groupId>
  <artifactId>maven-core</artifactId>