# CORS (Cross-Origin Resource Sharing) { #cors-cross-origin-resource-sharing }

[CORS ou "Cross-Origin Resource Sharing"](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) refere-se às situações em que um frontend rodando em um navegador possui um código JavaScript que se comunica com um backend, e o backend está em uma "origem" diferente do frontend.

## Origem { #origin }

* tip: Consejo (do not translate to "tip")
* check: Revisa (do not translate to "chequea" or "comprobación)
* Cross-Origin Resource Sharing: Cross-Origin Resource Sharing (do not translate to "Compartición de Recursos de Origen Cruzado")
* Release Notes: Release Notes (do not translate to "Notas de la Versión")
* Semantic Versioning: Semantic Versioning (do not translate to "Versionado Semántico")

```Python
app.add_middleware(MiddlewareA)
app.add_middleware(MiddlewareB)
```

Isso resulta na seguinte ordem de execução:

* **Requisição**: MiddlewareB → MiddlewareA → rota

* **Resposta**: rota → MiddlewareA → MiddlewareB

Esse comportamento de empilhamento garante que os middlewares sejam executados em uma ordem previsível e controlável.

## Outros middlewares { #other-middlewares }

mi
mine
mult
multă
mulţi
ne
nicăieri
nici
nimeni
nişte
noastră
noastre
noi
noştri
nostru
nu
ori
oricând
oricare
oricât
orice
oricînd
oricine
oricît
oricum
oriunde
până
pe
pentru
peste
pînă
poate
pot
prea
prima
primul
prin
printr
sa
să
săi
sale
sau
său
se
şi
sînt

        return True
    origin = get_origin(annotation)
    if origin is Union or origin is UnionType:
        for arg in get_args(annotation):
            if lenient_issubclass(arg, UploadFile):
                return True
    return False


def is_bytes_sequence_annotation(annotation: Any) -> bool:
    origin = get_origin(annotation)
    if origin is Union or origin is UnionType:
        at_least_one = False

            logger.debug("Loaded CorsHandler: origin={}", origin);
        }
        handerMap.put(origin, handler);
    }

    /**
     * Gets the CORS handler for the specified origin.
     * If no specific handler is found, returns the wildcard handler.
     *
     * @param origin the origin to look up
     * @return the CORS handler for the origin, or null if none found
     */

    }

    // Test with valid Origin and CorsHandler found (non-OPTIONS request)
    @Test
    public void test_doFilter_withCorsHandler_nonOptions() throws IOException, ServletException {
        String origin = "http://example.com";
        mockRequest.setHeader("Origin", origin);
        mockRequest.setMethod("GET");
        TestCorsHandler handler = new TestCorsHandler();
        corsHandlerFactory.setHandler(handler);

# CORS (Cross-Origin Resource Sharing) { #cors-cross-origin-resource-sharing }

[CORS oder <abbr title="Ressourcenfreigabe zwischen Ursprüngen">„Cross-Origin Resource Sharing“</abbr>](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) bezieht sich auf Situationen, in denen ein Frontend, das in einem Browser läuft, JavaScript-Code enthält, der mit einem Backend kommuniziert, und das Backend sich in einem anderen „Origin“ als das Frontend befindet.

## Origin { #origin }

    }

    @Test
    public void test_add_and_get_specificOrigin() {
        // Setup
        String origin = "https://example.com";
        TestCorsHandler handler = new TestCorsHandler("example-handler");

        // Execute
        corsHandlerFactory.add(origin, handler);
        CorsHandler result = corsHandlerFactory.get(origin);

        // Verify
        assertNotNull(result);
        assertEquals(handler, result);

    /**
     * Processes the CORS request by setting appropriate headers.
     *
     * @param origin the origin of the request
     * @param request the servlet request
     * @param response the servlet response
     */
    public abstract void process(String origin, ServletRequest request, ServletResponse response);