* once after loading completes). Much internal cache management is performed at the segment
   * granularity. For example, access queues and write queues are kept per segment when they are
   * required by the selected eviction algorithm. As such, when writing unit tests it is not

   * returned list. Unlike {@link Arrays#asList}, the returned list is unmodifiable.
   *
   * <p>This is useful when a varargs method needs to use a signature such as {@code (Foo firstFoo,
   * Foo... moreFoos)}, in order to avoid overload ambiguity or to enforce a minimum argument count.
   *
   * <p>The returned list is serializable and implements {@link RandomAccess}.
   *

   *
   * <p>The default implementation returns {@link Optional#absent}. Some sources, such as a {@code
   * CharSequence}, may return a non-absent value. Note that in such cases, it is <i>possible</i>
   * that this method will return a different number of chars than would be returned by reading all
   * of the chars.
   *
   * <p>Additionally, for mutable sources such as {@code StringBuilder}s, a subsequent read may

   *
   * <p>The default implementation returns {@link Optional#absent}. Some sources, such as a {@code
   * CharSequence}, may return a non-absent value. Note that in such cases, it is <i>possible</i>
   * that this method will return a different number of chars than would be returned by reading all
   * of the chars.
   *
   * <p>Additionally, for mutable sources such as {@code StringBuilder}s, a subsequent read may

Aber schauen wir uns zunächst einmal diese grundlegenden **konzeptionellen Ideen** an. Diese Konzepte gelten auch für jede andere Art von Web-API. 💡

## Sicherheit – HTTPS { #security-https }

Im [vorherigen Kapitel über HTTPS](https.md){.internal-link target=_blank} haben wir erfahren, wie HTTPS Verschlüsselung für Ihre API bereitstellt.

        listen  [::]:9000;
        server_name  localhost;

        # To allow special characters in headers
        ignore_invalid_headers off;
        # Allow any size file to be uploaded.
        # Set to a value such as 1000m; to restrict file size to a specific value
        client_max_body_size 0;
        # To disable buffering
        proxy_buffering off;
        proxy_request_buffering off;

        location / {

    advances.
*   Trolling, insulting/derogatory comments, and personal or political attacks.
*   Public or private harassment.
*   Publishing others' private information, such as a physical or electronic
    address, without explicit permission.
*   Conduct which could reasonably be considered inappropriate for the forum in
    which it occurs.

        if (asInterface == null) {
          throw formatIllegalArgumentException("No such interface: '%s'", scope);
        }
        return Inet6Address.getByAddress(
            v6Address.getHostAddress(), v6Address.getAddress(), asInterface);
      } catch (SocketException | UnknownHostException e) {
        throw new IllegalArgumentException("No such interface: " + scope, e);
      }
    } catch (UnknownHostException e) {

Alle folgenden sind also unterschiedliche Origins:

* `http://localhost`
* `https://localhost`
* `http://localhost:8080`

Auch wenn sie alle in `localhost` sind, verwenden sie unterschiedliche Protokolle oder Ports, daher sind sie unterschiedliche „Origins“.

## Schritte { #steps }

        That's a lot of work they are doing, but if more FastAPI users came to help others like them just a little bit more, it would be much less effort for them (and you and me 😅).

        By asking questions in a structured way (following this) it will be much easier to help you.

        And there's a high chance that you will find the solution along the way and you won't even have to submit it and wait for an answer. 😎