Damit wird auch vermieden, neue Entwickler möglicherweise zu verwirren, die einen nicht verwendeten Parameter in Ihrem Code sehen und ihn für unnötig halten könnten.

!!! info
    In diesem Beispiel verwenden wir zwei erfundene benutzerdefinierte Header `X-Key` und `X-Token`.

```Python hl_lines="26"
{!../../../docs_src/custom_request_and_route/tutorial003.py!}
```

In diesem Beispiel verwenden die *Pfadoperationen* unter dem `router` die benutzerdefinierte `TimedRoute`-Klasse und haben in der Response einen zusätzlichen `X-Response-Time`-Header mit der Zeit, die zum Generieren der Response benötigt wurde:

```Python hl_lines="13-20"
{!../../../docs_src/custom_request_and_route/tutorial003.py!}

Dann möchten Sie vielleicht **einen einzelnen Container** mit einem **Prozessmanager** haben, der darin **mehrere Workerprozesse** startet.

#### Prometheus und andere Gründe

        nextRouteToTry = retryRoute
        return true
      }
    }

    // If we have a routes left, use 'em.
    if (routeSelection?.hasNext() == true) return true

    // If we haven't initialized the route selector yet, assume it'll have at least one route.
    val localRouteSelector = routeSelector ?: return true

    // If we do have a route selector, use its routes.

Das ist sehr nützlich, wenn Sie:

* Eine gemeinsame Logik haben (die gleiche Code-Logik immer und immer wieder).
* Datenbankverbindungen teilen.
* Sicherheit, Authentifizierung, Rollenanforderungen, usw. durchsetzen.
* Und viele andere Dinge ...

politely, `for I can't understand it myself to begin with; and
being so many different sizes in a day is very confusing.'

  `It isn't,' said the Caterpillar.

  `Well, perhaps you haven't found it so yet,' said Alice; `but
when you have to turn into a chrysalis--you will some day, you
know--and then after that into a butterfly, I should think you'll
feel it a little queer, won't you?'

pkg syscall (darwin-arm64), type RawSockaddrAny struct, Pad [92]int8
pkg syscall (darwin-arm64), type RawSockaddrDatalink struct
pkg syscall (darwin-arm64), type RawSockaddrDatalink struct, Alen uint8
pkg syscall (darwin-arm64), type RawSockaddrDatalink struct, Data [12]int8
pkg syscall (darwin-arm64), type RawSockaddrDatalink struct, Family uint8
pkg syscall (darwin-arm64), type RawSockaddrDatalink struct, Index uint16

pkg syscall (freebsd-arm64), type RawSockaddrAny struct, Pad [92]int8
pkg syscall (freebsd-arm64), type RawSockaddrDatalink struct
pkg syscall (freebsd-arm64), type RawSockaddrDatalink struct, Alen uint8
pkg syscall (freebsd-arm64), type RawSockaddrDatalink struct, Data [46]int8
pkg syscall (freebsd-arm64), type RawSockaddrDatalink struct, Family uint8

### Asenkron kodun diğer biçimleri

Bu `async` ve `await` kullanimi oldukça yenidir.

Ancak asenkron kodla çalışmayı çok daha kolay hale getirir.

Aynı sözdizimi (hemen hemen aynı) son zamanlarda JavaScript'in modern sürümlerine de dahil edildi (Tarayıcı ve NodeJS'de).

Ancak bundan önce, asenkron kodu işlemek oldukça karmaşık ve zordu.

    `NullPointerException`.
 *  Fix: Better handling of uncaught exceptions in MockWebServer with HTTP/2.

## Version 2.3.0

_2015-03-16_

 *  **HTTP/2 support.** We've done interop testing and haven't seen any
    problems. HTTP/2 support has been a big effort and we're particularly
    thankful to Adrian Cole who has helped us to reach this milestone.