## Otros middlewares

Hay muchos otros middlewares ASGI.

Por ejemplo:

* <a href="https://github.com/encode/uvicorn/blob/master/uvicorn/middleware/proxy_headers.py" class="external-link" target="_blank">`ProxyHeadersMiddleware` de Uvicorn</a>

// Value implements serializer interface
func (GobSerializer) Value(ctx context.Context, field *Field, dst reflect.Value, fieldValue interface{}) (interface{}, error) {
	buf := new(bytes.Buffer)
	err := gob.NewEncoder(buf).Encode(fieldValue)
	return buf.Bytes(), err

    @Override
    public int size() {
        // Context header (16) + name length (4) + padding to 8-byte alignment + data (16)
        return 16 + 4 + 4 + STRUCTURE_SIZE;
    }

    @Override
    public int encode(byte[] dst, int dstIndex) {
        int start = dstIndex;

        // Write context header
        SMBUtil.writeInt4(0, dst, dstIndex); // Next (offset to next context, 0 for last)
        dstIndex += 4;

pkg debug/elf, const R_390_TLS_TPOFF R_390
pkg debug/elf, method (R_390) GoString() string
pkg debug/elf, method (R_390) String() string
pkg debug/elf, type R_390 int
pkg encoding/json, method (*Encoder) SetEscapeHTML(bool)
pkg encoding/json, method (*Encoder) SetIndent(string, string)
pkg go/build, type Package struct, BinaryOnly bool
pkg go/build, type Package struct, CgoFFLAGS []string
pkg go/build, type Package struct, FFiles []string

    private final int d;

    // Four 64-bit words of internal state.
    // The initial state corresponds to the ASCII string "somepseudorandomlygeneratedbytes",
    // big-endian encoded. There is nothing special about this value; the only requirement
    // was some asymmetry so that the initial v0 and v1 differ from v2 and v3.
    private long v0 = 0x736f6d6570736575L;
    private long v1 = 0x646f72616e646f6dL;

        return dstIndex - start;
    }

    @Override
    protected int writeDataWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;
        dstIndex += this.info.encode(dst, dstIndex);

        /* 6 zeros observed with NT */
        SMBUtil.writeInt8(0L, dst, dstIndex);
        dstIndex += 6;

        /*
         * Also observed 4 byte alignment but we stick

                return; // no NTLM
            }
            int attempt = 0;
            while (attempt < MAX_REDIRECTS) {
                connection.setRequestProperty(authProperty, authMethod + ' ' + Base64.encode(type1.toByteArray()));
                connection.connect(); // send type 1
                response = parseResponseCode();
                if (response != HTTP_UNAUTHORIZED && response != HTTP_PROXY_AUTH) {

## Andere Middlewares

Es gibt viele andere ASGI-Middlewares.

Zum Beispiel:

* <a href="https://github.com/encode/uvicorn/blob/master/uvicorn/middleware/proxy_headers.py" class="external-link" target="_blank">Uvicorns `ProxyHeadersMiddleware`</a>

  public val body: ByteString?,
  /** The total size of the body of this request (before truncation).*/
  public val bodySize: Long,
  /**
   * The sizes of the chunks of this request's body, or null if the request's body was not encoded
   * with chunked encoding.
   */
  public val chunkSizes: List<Int>?,
  /**
   * The failure MockWebServer recorded when attempting to decode this request. If, for example,

            SMBUtil.writeInt4(0, dst, inBufferLengthOffset);
        } else {
            SMBUtil.writeInt2(dstIndex - getHeaderStart(), dst, inBufferOffsetOffset);
            final int len = this.inputBuffer.encode(dst, dstIndex);
            SMBUtil.writeInt4(len, dst, inBufferLengthOffset);
            dstIndex += len;
        }
        return dstIndex - start;
    }

    /**
     * {@inheritDoc}
     *