///

```Python hl_lines="10"
{!> ../../docs_src/header_param_models/tutorial002.py!}
```

////

Se um cliente tentar enviar alguns **cabeçalhos extra**, eles irão receber uma resposta de **erro**.

Por exemplo, se o cliente tentar enviar um cabeçalho `tool` com o valor `plumbus`, ele irá receber uma resposta de **erro** informando que o parâmetro do cabeçalho `tool` não é permitido:

```json

    static {
        DEFAULT_FLAGS = NTLMSSP_NEGOTIATE_NTLM |
                (Config.getBoolean("jcifs.smb1.smb.client.useUnicode", true) ?
                        NTLMSSP_NEGOTIATE_UNICODE : NTLMSSP_NEGOTIATE_OEM);
        DEFAULT_DOMAIN = Config.getProperty("jcifs.smb1.smb.client.domain", null);
        byte[] domain = new byte[0];
        if (DEFAULT_DOMAIN != null) {
            try {

			wg.Wait()
			defer xioutil.SafeClose(handlerIn)
			m.handleInbound(c, inbound, handlerIn)
		}(m.inbound)
	}
	// Fill outbound block.
	// Each token represents a message that can be sent to the client without blocking.
	// The client will refill the tokens as they confirm delivery of the messages.
	for i := 0; i < outboundCap; i++ {
		m.outBlock <- struct{}{}
	}

	// Handler goroutine.
	var handlerErr atomic.Pointer[RemoteErr]

    chmod +x /go/bin/minio

# Download mc binary and signature files
RUN curl -s -q https://dl.min.io/client/mc/release/linux-${TARGETARCH}/mc -o /go/bin/mc && \
    curl -s -q https://dl.min.io/client/mc/release/linux-${TARGETARCH}/mc.minisig -o /go/bin/mc.minisig && \
    curl -s -q https://dl.min.io/client/mc/release/linux-${TARGETARCH}/mc.sha256sum -o /go/bin/mc.sha256sum && \
    chmod +x /go/bin/mc

@app.get("/user", dependencies=[Depends(set_up_request_state_dependency)])
def get_user():
    request_state = legacy_request_state_context_var.get()
    assert request_state
    return request_state["user"]


client = TestClient(app)


def test_dependency_contextvars():
    """
    Check that custom middlewares don't affect the contextvar context for dependencies.

# Exceptions - `HTTPException` and `WebSocketException`

These are the exceptions that you can raise to show errors to the client.

When you raise an exception, as would happen with normal Python, the rest of the execution is aborted. This way you can raise these exceptions from anywhere in the code to abort a request and show the error to the client.

You can use:

* `HTTPException`
* `WebSocketException`

from ...utils import needs_py310


@needs_py310
def test():
    from docs_src.background_tasks.tutorial002_py310 import app

    client = TestClient(app)
    log = Path("log.txt")
    if log.is_file():
        os.remove(log)  # pragma: no cover
    response = client.post("/send-notification/******@****.***?q=some-query")
    assert response.status_code == 200, response.text

	}

	// Use generated credentials to authenticate with MinIO server
	minioClient, err := minio.New(stsEndpointURL.Host, opts)
	if err != nil {
		log.Fatalf("Error initializing client: %v", err)
	}

	// Use minIO Client object normally like the regular client.
	if bucketToList == "" {
		bucketToList = minioUsername
	}
	fmt.Printf("Calling list objects on bucket named `%s` with temp creds:\n===\n", bucketToList)

    chmod +x /go/bin/minio

# Download mc binary and signature files
RUN curl -s -q https://dl.min.io/client/mc/release/linux-${TARGETARCH}/mc -o /go/bin/mc && \
    curl -s -q https://dl.min.io/client/mc/release/linux-${TARGETARCH}/mc.minisig -o /go/bin/mc.minisig && \
    curl -s -q https://dl.min.io/client/mc/release/linux-${TARGETARCH}/mc.sha256sum -o /go/bin/mc.sha256sum && \
    chmod +x /go/bin/mc

    chmod +x /go/bin/minio

# Download mc binary and signature files
RUN curl -s -q https://dl.min.io/client/mc/release/linux-${TARGETARCH}/mc -o /go/bin/mc && \
    curl -s -q https://dl.min.io/client/mc/release/linux-${TARGETARCH}/mc.minisig -o /go/bin/mc.minisig && \
    curl -s -q https://dl.min.io/client/mc/release/linux-${TARGETARCH}/mc.sha256sum -o /go/bin/mc.sha256sum && \
    chmod +x /go/bin/mc