`\0` would cause a late crash when building the request.
 *  Fix: Allow interceptors to change the request method.
 *  Fix: Don’t use the request's `User-Agent` or `Proxy-Authorization` when
    connecting to an HTTPS server via an HTTP tunnel. The `Proxy-Authorization`
    header was being leaked to the origin server.
 *  Fix: Digits may be used in a URL scheme.
 *  Fix: Improve connection timeout recovery.

    return Primitives.wrap(type).cast(generateFresh(TypeToken.of(type)));
  }

  final <T> T newFreshProxy(Class<T> interfaceType) {
    T proxy = newProxy(interfaceType);
    freshness.incrementAndGet();
    return proxy;
  }

  /**
   * Generates an instance for {@code type} using the current {@link #freshness}. The generated
   * instance may or may not be unique across different calls.

            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header X-NginX-Proxy true;

            # This is necessary to pass the correct IP to be hashed
            real_ip_header X-Real-IP;

            proxy_connect_timeout 300;
            
            # To support websocket

{* ../../docs_src/header_param_models/tutorial003_an_py310.py hl[19] *}

/// warning | Alertes

Avant de définir `convert_underscores` à `False`, gardez à l'esprit que certains proxys et serveurs HTTP interdisent l'utilisation d'en-têtes contenant des underscores.

///

## Résumé { #summary }

  @Test
  public void putEdge_existingNodes() {
    assume().that(graphIsMutable()).isTrue();

    // Adding nodes initially for safety (insulating from possible future
    // modifications to proxy methods)
    addNode(N1);
    addNode(N2);

    assertThat(graphAsMutableGraph.putEdge(N1, N2)).isTrue();
  }

  @Test
  public void putEdge_existingEdgeBetweenSameNodes() {

            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header X-NginX-Proxy true;

            # This is necessary to pass the correct IP to be hashed
            real_ip_header X-Real-IP;

            proxy_connect_timeout 300;
            
            # To support websocket

COPY ./app /code/app

CMD ["fastapi", "run", "app/main.py", "--port", "80"]

# Wenn Sie hinter einem Proxy wie Nginx oder Traefik sind, fügen Sie --proxy-headers hinzu
# CMD ["fastapi", "run", "app/main.py", "--port", "80", "--proxy-headers"]
```

</details>

## Was ist ein Container { #what-is-a-container }

{* ../../docs_src/header_params/tutorial002_an_py310.py hl[10] *}

/// warning | Achtung

Bevor Sie `convert_underscores` auf `False` setzen, bedenken Sie, dass manche HTTP-Proxys und Server die Verwendung von Headern mit Unterstrichen nicht erlauben.

///

## Doppelte Header { #duplicate-headers }

   *   <li>If a constructor or factory method takes a parameter whose type is interface, a dynamic
   *       proxy will be passed to the method. It's possible that the method body expects an
   *       instance method of the passed-in proxy to be of a certain value yet the proxy isn't aware
   *       of the assumption, in which case the equality check before and after serialization will
   *       fail.

```
INFO: Sending request http://www.publicobject.com/helloworld.txt on Connection{www.publicobject.com:80, proxy=DIRECT hostAddress=54.187.32.157 cipherSuite=none protocol=http/1.1}
User-Agent: OkHttp Example
Host: www.publicobject.com
Connection: Keep-Alive
Accept-Encoding: gzip