add Header from struct function

req.go

@@ -48,6 +48,7 @@ func (h Header) Clone() Header {
 	return hh
 }
 
+// ParseStruct parse struct into header
 func ParseStruct(h Header, v interface{}) Header {
 	data, err := json.Marshal(v)
 	if err != nil {
@@ -58,6 +59,14 @@ func ParseStruct(h Header, v interface{}) Header {
 	return h
 }
 
+// HeaderFromStruct init header from struct
+func HeaderFromStruct(v interface{}) Header {
+
+	var header Header
+	header = ParseStruct(header, v)
+	return header
+}
+
 // Param represents  http request param
 type Param map[string]interface{}
 

req_test.go

@@ -270,7 +270,7 @@ func TestHeader(t *testing.T) {
 func TestParseStruct(t *testing.T) {
 
 	type HeaderStruct struct {
-		UserAgent string `json:"User-Agent"`
+		UserAgent     string `json:"User-Agent"`
 		Authorization string `json:"Authorization"`
 	}
 
@@ -282,6 +282,26 @@ func TestParseStruct(t *testing.T) {
 	var header Header
 	header = ParseStruct(header, h)
 
+	if header["User-Agent"] != "V1.0.0" && header["Authorization"] != "roc" {
+		t.Fatal("struct parser for header is not working")
+	}
+
+}
+
+func TestHeaderFromStruct(t *testing.T) {
+
+	type HeaderStruct struct {
+		UserAgent string `json:"User-Agent"`
+		Authorization string `json:"Authorization"`
+	}
+
+	h := HeaderStruct{
+		"V1.0.0",
+		"roc",
+	}
+
+	header := HeaderFromStruct(h)
+
 	if header["User-Agent"] != "V1.0.0" && header["Authorization"] != "roc" {
 		t.Fatal("struct parser for header is not working")
 	}