return messWith("crc32-not-streamed.zip", func(b []byte) {
		// Corrupt foo.txt's final crc32 byte, in both
		// the file header and TOC. (0x7e -> 0x7f)
		b[0x11]++
		b[0x9d]++

		// TODO(bradfitz): add a new test that only corrupts
		// one of these values, and verify that that's also an
		// error. Currently, the reader code doesn't verify the
		// fileheader and TOC's crc32 match if they're both

}

// parsePostPolicyForm - Parse JSON policy string into typed PostPolicyForm structure.
func parsePostPolicyForm(r io.Reader) (PostPolicyForm, error) {
	reader, err := sanitizePolicy(r)
	if err != nil {
		return PostPolicyForm{}, err
	}

	d := json.NewDecoder(reader)

	// Convert po into interfaces and
	// perform strict type conversion using reflection.
	var rawPolicy struct {

            // Close the digest
            digest.close();

            // Verify operations fail after close
            byte[] data = new byte[128];
            // Initialize the data buffer with proper SMB2 header structure
            SMBUtil.writeInt4(0xFE534D42, data, 0); // SMB2 signature
            SMBUtil.writeInt4(0x0000, data, 12); // Command = 0
            SMBUtil.writeInt4(0x0000, data, 16); // Flags = 0

                                     readRegion.getAddress(),
                                     readRegion.getSize());
            
            // Send request header via RDMA send
            sendWithRdmaSendReceive(request);
            
            // Wait for server to write data directly to our buffer via RDMA

So we put them in their own `dependencies` module (`app/dependencies.py`).

We will now use a simple dependency to read a custom `X-Token` header:

//// tab | Python 3.9+

```Python hl_lines="3  6-8" title="app/dependencies.py"
{!> ../../docs_src/bigger_applications/app_an_py39/dependencies.py!}
```

////

//// tab | Python 3.8+

	return resp.Body, nil
}

var updateInProgress atomic.Uint32

// Function to get the reader from an architecture
func downloadBinary(u *url.URL, mode string) (binCompressed []byte, bin []byte, err error) {
	transport := getUpdateTransport(30 * time.Second)
	var reader io.ReadCloser
	if u.Scheme == "https" || u.Scheme == "http" {
		reader, err = getUpdateReaderFromURL(u, transport, mode)
		if err != nil {
			return nil, nil, err

				err = msgp.WrapError(err)
				return
			}
		}
	}
	return
}

// EncodeMsg implements msgp.Encodable
func (z *listPathOptions) EncodeMsg(en *msgp.Writer) (err error) {
	// map header, size 19
	// write "ID"
	err = en.Append(0xde, 0x0, 0x13, 0xa2, 0x49, 0x44)
	if err != nil {
		return
	}
	err = en.WriteString(z.ID)
	if err != nil {
		err = msgp.WrapError(err, "ID")
		return
	}

	if err != nil {
		return
	}

	outbuf := bytes.NewBuffer(nil)
	objectKey := crypto.GenerateKey(key.Plaintext, rand.Reader)
	sealedKey := objectKey.Seal(key.Plaintext, crypto.GenerateIV(rand.Reader), crypto.S3.String(), bucket, "")
	crypto.S3.CreateMetadata(metadata, key.KeyID, key.Ciphertext, sealedKey)

    level = DeprecationLevel.ERROR,
  )
  fun subtype(): String = subtype

  /**
   * Returns the encoded media type, like "text/plain; charset=utf-8", appropriate for use in a
   * Content-Type header.
   */
  override fun toString(): String = mediaType

  override fun equals(other: Any?): Boolean = other is MediaType && other.mediaType == mediaType

  override fun hashCode(): Int = mediaType.hashCode()

        if (n != HEADER_LENGTH) {
            if (n == -1) {
                return -1;
            }
            throw new IOException("unexpected EOF reading netbios session header");
        }
        return buffer[bufferIndex] & 0xFF;
    }

    int type, length;

    /**
     * Writes the packet to the specified byte array in wire format.
     *