# Advanced Middleware

In the main tutorial you read how to add [Custom Middleware](../tutorial/middleware.md){.internal-link target=_blank} to your application.

And then you also read how to handle [CORS with the `CORSMiddleware`](../tutorial/cors.md){.internal-link target=_blank}.

In this section we'll see how to use other middlewares.

## Adding ASGI middlewares

			internalLogIf(GlobalContext, errors.New("Detected older 'fifo' quota config, 'fifo' feature is removed and not supported anymore. Please clear your quota configs using 'mc admin bucket quota alias/bucket --clear' and use 'mc ilm add' for expiration of objects"), logger.WarningKind)
			return quotaCfg, fmt.Errorf("invalid quota type 'fifo'")
		}
		return quotaCfg, fmt.Errorf("Invalid quota config %#v", quotaCfg)
	}
	return
}

				"foo": "bar",
			},
		},
		false,
		-1,
	},
	{
		"Standard Claims",
		"",
		defaultKeyFunc,
		&StandardClaims{
			StandardClaims: jwt.StandardClaims{
				ExpiresAt: time.Now().Add(time.Second * 10).Unix(),
			},
		},
		true,
		0,
	},
}

func mapClaimsToken(claims *MapClaims) string {
	claims.SetAccessKey("test")
	j := jwt.NewWithClaims(jwt.SigningMethodHS512, claims)

		return nil
	}

	if entry.Level == logger.EventKind {
		fmt.Fprintln(c.output, entry.Message)
		return nil
	}

	traceLength := len(entry.Trace.Source)
	trace := make([]string, traceLength)

	// Add a sequence number and formatting for each stack trace
	// No formatting is required for the first entry
	for i, element := range entry.Trace.Source {
		trace[i] = fmt.Sprintf("%8v: %s", traceLength-i, element)
	}

      OneSizeGenerator<T, E> oneSizeGenerator =
          new OneSizeGenerator<>(getSubjectGenerator(), (CollectionSize) collectionSize);
      Set<Feature<?>> oneSizeFeatures = copyToSet(features);
      oneSizeFeatures.add(collectionSize);
      Set<Method> oneSizeSuppressedTests = getSuppressedTests();

      OneSizeTestSuiteBuilder<T, E> oneSizeBuilder =
          new OneSizeTestSuiteBuilder<T, E>(testers)
              .named(oneSizeName)

// MLIR implementation or to a graph implementation.
class TracingContext : public AbstractContext {
 protected:
  explicit TracingContext(AbstractContextKind kind) : AbstractContext(kind) {}

 public:
  // Add a function parameter and return the corresponding tensor.
  virtual absl::Status AddParameter(DataType dtype,
                                    const PartialTensorShape& shape,

                    if (currentDirective == null) {
                        currentDirective = new Directive(userAgent);
                        robotsTxt.addDirective(currentDirective);
                        currentDirectiveList.add(currentDirective);
                    }
                } else {
                    isGroupRecodeStarted = true;
                    value = getValue(DISALLOW_RECORD, line);
                    if (value != null) {

        metaDataMap.put(name, value);
    }

    public Map<String, Object> getMetaDataMap() {
        return metaDataMap;
    }

    public void addChildUrl(final RequestData url) {
        childUrlSet.add(url);
    }

    public void removeChildUrl(final RequestData url) {
        childUrlSet.remove(url);
    }

    public Set<RequestData> getChildUrlSet() {
        return childUrlSet;
    }

	for i, testCase := range testCases {
		result := testCase.set.Clone()

		if !reflect.DeepEqual(result, testCase.set) {
			t.Fatalf("test %v: result: expected: %v, got: %v", i+1, testCase.set, result)
		}

		result.add(testCase.targetIDToAdd)
		if reflect.DeepEqual(result, testCase.set) {
			t.Fatalf("test %v: result: expected: not equal, got: equal", i+1)
		}
	}
}

func TestTargetIDSetUnion(t *testing.T) {

	}
	defer l.Close()
	serverAddr := l.Addr().String()

	tcpListener, ok := l.(*net.TCPListener)
	if !ok {
		t.Fatalf("failed to assert to net.TCPListener")
	}

	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		defer wg.Done()

		tcpConn, terr := tcpListener.AcceptTCP()
		if terr != nil {
			t.Errorf("failed to accept new connection. %v", terr)
			return
		}
		deadlineconn := New(tcpConn)