# Including WSGI - Flask, Django, others { #including-wsgi-flask-django-others }

You can mount WSGI applications as you saw with [Sub Applications - Mounts](sub-applications.md), [Behind a Proxy](behind-a-proxy.md).

For that, you can use the `WSGIMiddleware` and use it to wrap your WSGI application, for example, Flask, Django, etc.

## Using `WSGIMiddleware` { #using-wsgimiddleware }

/// info

          .isEqualTo(returnType);
    }
    return sub;
  }

  /**
   * Call this in a {@link TestSubtype} public method asserting that subtype relationship does not
   * hold.
   */
  final <X> @Nullable X notSubtype(@SuppressWarnings("unused") Object sub) {
    Type returnType = method.getGenericReturnType();
    Type paramType = getOnlyParameterType();

Create a real JWT access token and return it.

{* ../../docs_src/security/tutorial004_an_py310.py hl[121:136] *}

### Technical details about the JWT "subject" `sub` { #technical-details-about-the-jwt-subject-sub }

The JWT specification says that there's a key `sub`, with the subject of the token.

It's optional to use it, but that's where you would put the user's identification, so we are using it here.

    new ForwardingWrapperTester().testForwarding(Sub.class, ForwardingSub::new);
  }

  interface Base {
    CharSequence getId();
  }

  interface Sub extends Base {
    @Override
    String getId();
  }

  private static final class ForwardingSub implements Sub {
    private final Sub delegate;

    ForwardingSub(Sub delegate) {
      this.delegate = delegate;
    }

		if len(h) < 32 {
			return nil, nil, fmt.Errorf("want subroute len 32, got %v", len(h))
		}
		subID := (*[32]byte)(h[len(h)-32:])
		sub = (*subHandlerID)(subID)
		// Add if more modifications to h is needed
		h = h[:len(h)-32]
	}
	return sub, h, nil
}

// setZeroPayloadFlag will clear or set the FlagPayloadIsZero if
// m.Payload is length 0, but not nil.
func (m *message) setZeroPayloadFlag() {

//	LSUBW rreg ',' sreg ',' rreg
//	{
//		outcode(int($1), &$2, int($4), &$6);
//	}
	SUB	R6, R26, R27	// 0346d822
	SUBU	R6, R26, R27	// 0346d823
	SUBV	R16, R17, R26	// 0230d02e
	SUBVU	R16, R17, R26	// 0230d02f

//	LSUBW imm ',' sreg ',' rreg
//	{
//		outcode(int($1), &$2, int($4), &$6);
//	}
	SUB	$-3126, R17, R22	// 22360c36
	SUB	$3126, R17, R22		// 2236f3ca
	SUBU	$16384, R17, R12	// 262cc000

	// ErrModelAccessibleFieldsRequired model accessible fields required
	ErrModelAccessibleFieldsRequired = errors.New("model accessible fields required")
	// ErrSubQueryRequired sub query required
	ErrSubQueryRequired = errors.New("sub query required")
	// ErrInvalidData unsupported data
	ErrInvalidData = errors.New("unsupported data")
	// ErrUnsupportedDriver unsupported driver
	ErrUnsupportedDriver = errors.New("unsupported driver")

Including how to handle lifespan state that can be used in other areas of your code.

///

## Sub Applications { #sub-applications }

    /**
     * Checks whether the SID is empty (no sub-authorities).
     *
     * @return whether the SID is empty (no sub-authorities)
     */
    public boolean isEmpty() {
        return this.sub_authority_count == 0;
    }

    /**
     * Checks whether the SID is blank (all sub-authorities zero).
     *
     * @return whether the SID is blank (all sub-authorities zero)
     */
    public boolean isBlank() {

        testBuffer[8] = 0x01; // Revision
        testBuffer[9] = 0x01; // Sub-authority count
        testBuffer[10] = 0x00; // Identifier authority
        testBuffer[11] = 0x00;
        testBuffer[12] = 0x00;
        testBuffer[13] = 0x00;
        testBuffer[14] = 0x00;
        testBuffer[15] = 0x01;
        testBuffer[16] = 0x00; // Sub-authority
        testBuffer[17] = 0x00;
        testBuffer[18] = 0x00;