<img src="/img/tutorial/bigger-applications/image01.png">

## Inclua o mesmo router várias vezes com `prefix` diferentes { #include-the-same-router-multiple-times-with-different-prefix }

Você também pode usar `.include_router()` várias vezes com o *mesmo* router usando prefixos diferentes.

///

## En-têtes personnalisés { #custom-headers }

Gardez à l'esprit que des en-têtes propriétaires personnalisés peuvent être ajoutés [en utilisant le préfixe `X-`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers).

	// comma, semi-colon or space. The match is case-insensitive.
	forRegex = regexp.MustCompile(`(?i)(?:for=)([^(;|,| )]+)(.*)`)
	// Allows for a sub-match for the first instance of scheme (http|https)
	// prefixed by 'proto='. The match is case-insensitive.
	protoRegex = regexp.MustCompile(`(?i)^(;|,| )+(?:proto=)(https|http)`)
)

// Used to disable all processing of the X-Forwarded-For header in source IP discovery.

{* ../../docs_src/middleware/tutorial001_py310.py hl[8:9,11,14] *}

/// tip | Astuce

Gardez à l’esprit que des en-têtes propriétaires personnalisés peuvent être ajoutés [en utilisant le préfixe `X-`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers).

nil, errors.New("ed25519: bad public key") } copy(pub.aBytes[:], pubBytes) return pub, nil } // Domain separation prefixes used to disambiguate Ed25519/Ed25519ph/Ed25519ctx. // See RFC 8032, Section 2 and Section 5.1. const ( // domPrefixPure is empty for pure Ed25519. domPrefixPure = "" // domPrefixPh is dom2(phflag=1) for Ed25519ph. It must be followed by the // uint8-length prefixed context. domPrefixPh = "SigEd25519 no Ed25519 collisions\x01" // domPrefixCtx is dom2(phflag=0) for Ed25519ctx. It...

    /**
     * Returns immutable system properties to use for interpolation. The system properties are collected from the
     * runtime environment such as {@link System#getProperties()} and environment variables
     * (prefixed with {@code env.}).
     *
     * @return the system properties, never {@code null}
     */
    @Nonnull
    Map<String, String> getSystemProperties();

    /**

Le code généré contient encore des **informations dupliquées**.

Nous savons déjà que cette méthode est liée aux **items** parce que ce mot figure dans `ItemsService` (issu du tag), mais nous avons encore le nom du tag préfixé dans le nom de la méthode. 😕

Nous voudrons probablement le conserver pour OpenAPI en général, car cela garantira que les operation IDs sont **uniques**.

}

// listMetrics - returns a handler that lists all the metrics that could be
// returned for the requested path.
//
// FIXME: It currently only lists `minio_` prefixed metrics.
func (h *metricsV3Server) listMetrics(path string) http.Handler {
	// First collect all matching MetricsGroup's
	matchingMG := make(map[collectorPath]*MetricsGroup)

UserInDB(**user_dict)
```

would be equivalent to:

```Python
UserInDB(**user_in.model_dump())
```

...because `user_in.model_dump()` is a `dict`, and then we make Python "unpack" it by passing it to `UserInDB` prefixed with `**`.

So, we get a Pydantic model from the data in another Pydantic model.

#### Unpacking a `dict` and extra keywords { #unpacking-a-dict-and-extra-keywords }

        assertEquals(1234, url.getPort(), "Explicit port should be preserved");
        assertEquals("smb", url.getProtocol());
    }

    @Test
    @DisplayName("parseURL: relative spec without scheme is prefixed for empty host")
    void testParseURL_RelativeSpecWithEmptyHost() throws MalformedURLException {
        // Arrange: base URL with empty host
        Handler handler = newHandler();