diff --git a/cmd/dfdaemon/app/init.go b/cmd/dfdaemon/app/init.go
index f169e8dd8..8570120c1 100644
--- a/cmd/dfdaemon/app/init.go
+++ b/cmd/dfdaemon/app/init.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package app
 
 import (
diff --git a/cmd/dfdaemon/app/root_test.go b/cmd/dfdaemon/app/root_test.go
index ec618fb04..11c153121 100644
--- a/cmd/dfdaemon/app/root_test.go
+++ b/cmd/dfdaemon/app/root_test.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package app
 
 import (
diff --git a/cmd/dfdaemon/app/version.go b/cmd/dfdaemon/app/version.go
index 17dc57eba..b76d085d7 100644
--- a/cmd/dfdaemon/app/version.go
+++ b/cmd/dfdaemon/app/version.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package app
 
 import (
diff --git a/cmd/supernode/app/version.go b/cmd/supernode/app/version.go
index 91ab4be3a..eda8ca859 100644
--- a/cmd/supernode/app/version.go
+++ b/cmd/supernode/app/version.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package app
 
 import (
diff --git a/dfdaemon/proxy/proxy.go b/dfdaemon/proxy/proxy.go
index 27ab8b1e3..949604657 100644
--- a/dfdaemon/proxy/proxy.go
+++ b/dfdaemon/proxy/proxy.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package proxy
 
 import (
diff --git a/dfdaemon/proxy/proxy_test.go b/dfdaemon/proxy/proxy_test.go
index 9d4c6ce5c..d5c505248 100644
--- a/dfdaemon/proxy/proxy_test.go
+++ b/dfdaemon/proxy/proxy_test.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package proxy
 
 import (
diff --git a/dfdaemon/server.go b/dfdaemon/server.go
index 5f2f83f85..e8d6fa751 100644
--- a/dfdaemon/server.go
+++ b/dfdaemon/server.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package dfdaemon
 
 import (
diff --git a/hack/boilerplate/check-boilerplate.go b/hack/boilerplate/check-boilerplate.go
new file mode 100644
index 000000000..96a972c85
--- /dev/null
+++ b/hack/boilerplate/check-boilerplate.go
@@ -0,0 +1,129 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+)
+
+var (
+	start       = " * Copyright "
+	end         = " * limitations under the License."
+	boilerplate = []string{
+		` * Copyright The Dragonfly Authors.`,
+		` *`,
+		` * Licensed under the Apache License, Version 2.0 (the "License");`,
+		` * you may not use this file except in compliance with the License.`,
+		` * You may obtain a copy of the License at`,
+		` *`,
+		` *      http://www.apache.org/licenses/LICENSE-2.0`,
+		` *`,
+		` * Unless required by applicable law or agreed to in writing, software`,
+		` * distributed under the License is distributed on an "AS IS" BASIS,`,
+		` * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.`,
+		` * See the License for the specific language governing permissions and`,
+		` * limitations under the License.`,
+	}
+)
+
+// checkBoilerplate checks if the input string contains the boilerplate
+func checkBoilerplate(content string) error {
+	// ignore generated files
+	if strings.Contains(content, "DO NOT EDIT") {
+		return nil
+	}
+
+	index := 0
+	foundStart := false
+	lines := strings.Split(content, "\n")
+	for _, line := range lines {
+		// find the start of the boilerplate
+		bpLine := boilerplate[index]
+		if strings.Contains(line, start) {
+			foundStart = true
+		}
+
+		// match line by line
+		if foundStart {
+			if line != bpLine {
+				return fmt.Errorf("boilerplate line %d does not match\nexpected: %q\ngot: %q", index+1, bpLine, line)
+			}
+			index++
+			// exit after the last line is found
+			if strings.Index(line, end) == 0 {
+				break
+			}
+		}
+	}
+
+	if !foundStart {
+		return fmt.Errorf("the file is missing a boilerplate")
+	}
+	if index < len(boilerplate) {
+		return errors.New("boilerplate has missing lines")
+	}
+	return nil
+}
+
+// verifyFile verifies if a file contains the boilerplate
+func verifyFile(filePath string) error {
+	if len(filePath) == 0 {
+		return errors.New("empty file name")
+	}
+
+	// check file extension is go
+	idx := strings.LastIndex(filePath, ".")
+	if idx == -1 {
+		return nil
+	}
+
+	// check if the file has a supported extension
+	ext := filePath[idx : idx+len(filePath)-idx]
+	if ext != ".go" {
+		return nil
+	}
+
+	// read the file
+	b, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		return err
+	}
+
+	return checkBoilerplate(string(b))
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Println("usage: go run check-boilerplate.go <path-to-file> <path-to-file> ...")
+		os.Exit(1)
+	}
+
+	hasErr := false
+	for _, filePath := range os.Args[1:] {
+		if err := verifyFile(filePath); err != nil {
+			fmt.Printf("error validating %q: %v\n", filePath, err)
+			hasErr = true
+		}
+	}
+	if hasErr {
+		os.Exit(1)
+	}
+}
diff --git a/hack/boilerplate/check-boilerplate_test.go b/hack/boilerplate/check-boilerplate_test.go
new file mode 100644
index 000000000..0e163ea9c
--- /dev/null
+++ b/hack/boilerplate/check-boilerplate_test.go
@@ -0,0 +1,65 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import (
+	"testing"
+)
+
+func TestVerifyBoilerPlate(t *testing.T) {
+	testcases := []struct {
+		name          string
+		bp            string
+		expectedError bool
+	}{
+		{
+			name: "valid: boilerplate is valid",
+			bp: `/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/`,
+			expectedError: false,
+		},
+		{
+			name: "invalid: missing lines",
+			bp: `
+ * Copyright The Dragonfly Authors.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+`,
+			expectedError: true,
+		},
+	}
+
+	for _, tc := range testcases {
+		t.Run(tc.name, func(t *testing.T) {
+			if err := checkBoilerplate(tc.bp); err != nil != tc.expectedError {
+				t.Errorf("expected error: %v, got: %v, error: %v", tc.expectedError, err != nil, err)
+			}
+		})
+	}
+}
diff --git a/hack/check.sh b/hack/check.sh
index 7f9a860bc..c5aa51bfc 100755
--- a/hack/check.sh
+++ b/hack/check.sh
@@ -32,6 +32,14 @@ check() {
     echo "CHECK: go vet, check code syntax"
     packages=$(go list ./... | sed 's/^_//')
     echo "${packages}" | xargs go vet 2>&1
+
+    # boilerplate check
+    echo "CHECK: boilerpalte, check code boilerplate"
+    result=$(git ls-files | xargs go run ./hack/boilerplate/check-boilerplate.go)
+    if [[ ${#result} -gt 0 ]]; then
+        echo "${result}"
+        return 1
+    fi
 }
 
 check
diff --git a/pkg/ratelimiter/ratelimiter.go b/pkg/ratelimiter/ratelimiter.go
index 879cd086d..cc7737ffb 100644
--- a/pkg/ratelimiter/ratelimiter.go
+++ b/pkg/ratelimiter/ratelimiter.go
@@ -2,7 +2,7 @@
  * Copyright The Dragonfly Authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use rl file except in compliance with the License.
+ * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
diff --git a/pkg/util/metrics_util.go b/pkg/util/metrics_util.go
index a1eba76e0..9d1d27a2a 100644
--- a/pkg/util/metrics_util.go
+++ b/pkg/util/metrics_util.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package util
 
 import (
diff --git a/supernode/config/config.go b/supernode/config/config.go
index 3210ac512..8f9d6dd71 100644
--- a/supernode/config/config.go
+++ b/supernode/config/config.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package config
 
 import (
diff --git a/supernode/daemon/daemon.go b/supernode/daemon/daemon.go
index e9212db81..21490476b 100644
--- a/supernode/daemon/daemon.go
+++ b/supernode/daemon/daemon.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package daemon
 
 import (
diff --git a/supernode/daemon/mgr/cdn/cache_detector.go b/supernode/daemon/mgr/cdn/cache_detector.go
index b28929acb..328af7c7e 100644
--- a/supernode/daemon/mgr/cdn/cache_detector.go
+++ b/supernode/daemon/mgr/cdn/cache_detector.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package cdn
 
 import (
diff --git a/supernode/daemon/mgr/cdn/cdn_util.go b/supernode/daemon/mgr/cdn/cdn_util.go
index 10fd587f8..f7870b1a8 100644
--- a/supernode/daemon/mgr/cdn/cdn_util.go
+++ b/supernode/daemon/mgr/cdn/cdn_util.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package cdn
 
 import (
diff --git a/supernode/daemon/mgr/cdn/downloader.go b/supernode/daemon/mgr/cdn/downloader.go
index 790766ca0..4b4f535cc 100644
--- a/supernode/daemon/mgr/cdn/downloader.go
+++ b/supernode/daemon/mgr/cdn/downloader.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package cdn
 
 import (
diff --git a/supernode/daemon/mgr/cdn/file_meta_data.go b/supernode/daemon/mgr/cdn/file_meta_data.go
index 7ccdc67ba..a284fbd01 100644
--- a/supernode/daemon/mgr/cdn/file_meta_data.go
+++ b/supernode/daemon/mgr/cdn/file_meta_data.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package cdn
 
 import (
diff --git a/supernode/daemon/mgr/cdn/manager.go b/supernode/daemon/mgr/cdn/manager.go
index 1d9301140..d955d0104 100644
--- a/supernode/daemon/mgr/cdn/manager.go
+++ b/supernode/daemon/mgr/cdn/manager.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package cdn
 
 import (
diff --git a/supernode/daemon/mgr/cdn/reporter.go b/supernode/daemon/mgr/cdn/reporter.go
index e503fb2c9..3e03db718 100644
--- a/supernode/daemon/mgr/cdn/reporter.go
+++ b/supernode/daemon/mgr/cdn/reporter.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package cdn
 
 import (
diff --git a/supernode/daemon/mgr/cdn/super_reader.go b/supernode/daemon/mgr/cdn/super_reader.go
index bc9ae6728..385d9504b 100644
--- a/supernode/daemon/mgr/cdn/super_reader.go
+++ b/supernode/daemon/mgr/cdn/super_reader.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package cdn
 
 import (
diff --git a/supernode/daemon/mgr/cdn/super_writer.go b/supernode/daemon/mgr/cdn/super_writer.go
index 9aa2ef404..960cfd491 100644
--- a/supernode/daemon/mgr/cdn/super_writer.go
+++ b/supernode/daemon/mgr/cdn/super_writer.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package cdn
 
 import (
diff --git a/supernode/daemon/mgr/cdn/super_writer_util.go b/supernode/daemon/mgr/cdn/super_writer_util.go
index 94f3f90fb..1d7bd8bf3 100644
--- a/supernode/daemon/mgr/cdn/super_writer_util.go
+++ b/supernode/daemon/mgr/cdn/super_writer_util.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package cdn
 
 import (
diff --git a/supernode/daemon/mgr/cdn_mgr.go b/supernode/daemon/mgr/cdn_mgr.go
index d1484f293..305ae9524 100644
--- a/supernode/daemon/mgr/cdn_mgr.go
+++ b/supernode/daemon/mgr/cdn_mgr.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package mgr
 
 import (
diff --git a/supernode/daemon/mgr/dfget_task_mgr.go b/supernode/daemon/mgr/dfget_task_mgr.go
index 09b08c1c4..6465b03e8 100644
--- a/supernode/daemon/mgr/dfget_task_mgr.go
+++ b/supernode/daemon/mgr/dfget_task_mgr.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package mgr
 
 import (
diff --git a/supernode/daemon/mgr/dfgettask/manager.go b/supernode/daemon/mgr/dfgettask/manager.go
index 13559ed82..b417e6fcb 100644
--- a/supernode/daemon/mgr/dfgettask/manager.go
+++ b/supernode/daemon/mgr/dfgettask/manager.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package dfgettask
 
 import (
diff --git a/supernode/daemon/mgr/peer/manager.go b/supernode/daemon/mgr/peer/manager.go
index 00b450f66..969452fc1 100644
--- a/supernode/daemon/mgr/peer/manager.go
+++ b/supernode/daemon/mgr/peer/manager.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package peer
 
 import (
diff --git a/supernode/daemon/mgr/peer_mgr.go b/supernode/daemon/mgr/peer_mgr.go
index 22aecbf3c..965fd74cb 100644
--- a/supernode/daemon/mgr/peer_mgr.go
+++ b/supernode/daemon/mgr/peer_mgr.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package mgr
 
 import (
diff --git a/supernode/daemon/mgr/progress/piece_state.go b/supernode/daemon/mgr/progress/piece_state.go
index ca1947e11..446084361 100644
--- a/supernode/daemon/mgr/progress/piece_state.go
+++ b/supernode/daemon/mgr/progress/piece_state.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package progress
 
 import (
diff --git a/supernode/daemon/mgr/progress/progress_manager.go b/supernode/daemon/mgr/progress/progress_manager.go
index 2dc738df5..9cd9925e5 100644
--- a/supernode/daemon/mgr/progress/progress_manager.go
+++ b/supernode/daemon/mgr/progress/progress_manager.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package progress
 
 import (
diff --git a/supernode/daemon/mgr/progress/progress_state.go b/supernode/daemon/mgr/progress/progress_state.go
index 26fe16b17..4d3540ff1 100644
--- a/supernode/daemon/mgr/progress/progress_state.go
+++ b/supernode/daemon/mgr/progress/progress_state.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package progress
 
 import (
diff --git a/supernode/daemon/mgr/progress/progress_util.go b/supernode/daemon/mgr/progress/progress_util.go
index 89ed636e2..df2371010 100644
--- a/supernode/daemon/mgr/progress/progress_util.go
+++ b/supernode/daemon/mgr/progress/progress_util.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package progress
 
 import (
diff --git a/supernode/daemon/mgr/progress/state_sync_map.go b/supernode/daemon/mgr/progress/state_sync_map.go
index da6ec4cc0..b065fcb6e 100644
--- a/supernode/daemon/mgr/progress/state_sync_map.go
+++ b/supernode/daemon/mgr/progress/state_sync_map.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package progress
 
 import (
diff --git a/supernode/daemon/mgr/progress_mgr.go b/supernode/daemon/mgr/progress_mgr.go
index 12ed923c6..e9506c658 100644
--- a/supernode/daemon/mgr/progress_mgr.go
+++ b/supernode/daemon/mgr/progress_mgr.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package mgr
 
 import (
diff --git a/supernode/daemon/mgr/scheduler/manager.go b/supernode/daemon/mgr/scheduler/manager.go
index e62ac5bab..dd0d23662 100644
--- a/supernode/daemon/mgr/scheduler/manager.go
+++ b/supernode/daemon/mgr/scheduler/manager.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package scheduler
 
 import (
diff --git a/supernode/daemon/mgr/scheduler_mgr.go b/supernode/daemon/mgr/scheduler_mgr.go
index 4c1a3bfff..7158e5a42 100644
--- a/supernode/daemon/mgr/scheduler_mgr.go
+++ b/supernode/daemon/mgr/scheduler_mgr.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package mgr
 
 import (
diff --git a/supernode/daemon/mgr/task/manager.go b/supernode/daemon/mgr/task/manager.go
index fa6452f54..d62b5e98a 100644
--- a/supernode/daemon/mgr/task/manager.go
+++ b/supernode/daemon/mgr/task/manager.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package task
 
 import (
diff --git a/supernode/daemon/mgr/task_mgr.go b/supernode/daemon/mgr/task_mgr.go
index df24da35f..1fd3308b1 100644
--- a/supernode/daemon/mgr/task_mgr.go
+++ b/supernode/daemon/mgr/task_mgr.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package mgr
 
 import (
diff --git a/supernode/daemon/util/filter.go b/supernode/daemon/util/filter.go
index 6a40f2c29..9106f32b1 100644
--- a/supernode/daemon/util/filter.go
+++ b/supernode/daemon/util/filter.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package util
 
 import (
diff --git a/supernode/daemon/util/store.go b/supernode/daemon/util/store.go
index 3d1474b51..093a965da 100644
--- a/supernode/daemon/util/store.go
+++ b/supernode/daemon/util/store.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package util
 
 import (
diff --git a/supernode/httpclient/origin_http_client.go b/supernode/httpclient/origin_http_client.go
index 9f7c023a3..5733bdedc 100644
--- a/supernode/httpclient/origin_http_client.go
+++ b/supernode/httpclient/origin_http_client.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package httpclient
 
 import (
diff --git a/supernode/server/0.3_bridge.go b/supernode/server/0.3_bridge.go
index ff14a0730..aaf37e5db 100644
--- a/supernode/server/0.3_bridge.go
+++ b/supernode/server/0.3_bridge.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package server
 
 import (
diff --git a/supernode/server/handler.go b/supernode/server/handler.go
index ffc8c0972..d55b84902 100644
--- a/supernode/server/handler.go
+++ b/supernode/server/handler.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package server
 
 import (
diff --git a/supernode/server/metrics.go b/supernode/server/metrics.go
index 0ac4e4019..da0b70850 100644
--- a/supernode/server/metrics.go
+++ b/supernode/server/metrics.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package server
 
 import (
diff --git a/supernode/server/peer_bridge.go b/supernode/server/peer_bridge.go
index 543f0ab28..f498198f1 100644
--- a/supernode/server/peer_bridge.go
+++ b/supernode/server/peer_bridge.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package server
 
 import (
diff --git a/supernode/server/result_info.go b/supernode/server/result_info.go
index 37f4c63b5..cf1b657dc 100644
--- a/supernode/server/result_info.go
+++ b/supernode/server/result_info.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package server
 
 import (
diff --git a/supernode/server/router.go b/supernode/server/router.go
index e3ddd3985..6f9f99440 100644
--- a/supernode/server/router.go
+++ b/supernode/server/router.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package server
 
 import (
diff --git a/supernode/server/router_test.go b/supernode/server/router_test.go
index ec3a03a45..3c176e48f 100644
--- a/supernode/server/router_test.go
+++ b/supernode/server/router_test.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package server
 
 import (
diff --git a/supernode/server/server.go b/supernode/server/server.go
index 94993fde6..90ed89202 100644
--- a/supernode/server/server.go
+++ b/supernode/server/server.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package server
 
 import (
diff --git a/supernode/server/system_bridge.go b/supernode/server/system_bridge.go
index ae2462827..4cfdbafe8 100644
--- a/supernode/server/system_bridge.go
+++ b/supernode/server/system_bridge.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package server
 
 import (
diff --git a/test/api_metrics_test.go b/test/api_metrics_test.go
index 1554a84d4..09040de63 100644
--- a/test/api_metrics_test.go
+++ b/test/api_metrics_test.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package main
 
 import (
diff --git a/test/api_ping_test.go b/test/api_ping_test.go
index 1c5bd63a7..77836cb83 100644
--- a/test/api_ping_test.go
+++ b/test/api_ping_test.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package main
 
 import (
diff --git a/test/environment/env.go b/test/environment/env.go
index 21af1e817..4f995a80c 100644
--- a/test/environment/env.go
+++ b/test/environment/env.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package environment
 
 import (
diff --git a/test/main_test.go b/test/main_test.go
index adca6883c..5f5e408a6 100644
--- a/test/main_test.go
+++ b/test/main_test.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package main
 
 import (
diff --git a/test/request/request.go b/test/request/request.go
index 38dcc23f0..a90fb6a98 100644
--- a/test/request/request.go
+++ b/test/request/request.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package request
 
 import (
diff --git a/test/util_api.go b/test/util_api.go
index ccd6a9851..a4d4d1e72 100644
--- a/test/util_api.go
+++ b/test/util_api.go
@@ -1,3 +1,19 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package main
 
 import (