prepare_v4 (#199)

move to v4 micro

Co-authored-by: Vasiliy Tolstov <v.tolstov@unistack.org>
Reviewed-on: #199
Co-authored-by: Evstigneev Denis <danteevstigneev@yandex.ru>
Co-committed-by: Evstigneev Denis <danteevstigneev@yandex.ru>

util.go

@@ -5,8 +5,8 @@ import (
 	"net/http"
 	"strings"
 
-	"go.unistack.org/micro/v3/metadata"
-	rutil "go.unistack.org/micro/v3/util/reflect"
+	"go.unistack.org/micro/v4/metadata"
+	rutil "go.unistack.org/micro/v4/util/reflect"
 )
 
 func FillRequest(ctx context.Context, req interface{}, opts ...FillRequestOption) error {
@@ -15,39 +15,52 @@ func FillRequest(ctx context.Context, req interface{}, opts ...FillRequestOption
 	for _, o := range opts {
 		o(&options)
 	}
+
 	md, ok := metadata.FromIncomingContext(ctx)
 	if !ok {
 		return nil
 	}
 
 	for idx := 0; idx < len(options.headers)/2; idx += 2 {
-		k := http.CanonicalHeaderKey(options.headers[idx])
-		v, ok := md[k]
+		k := options.headers[idx]
+		v, ok := md.Get(k)
 		if !ok {
 			continue
 		}
-		if err = rutil.SetFieldByPath(req, v, k); err != nil {
+
+		if len(v) == 1 {
+			err = rutil.SetFieldByPath(req, v[0], k)
+		} else {
+			err = rutil.SetFieldByPath(req, v, k)
+		}
+		if err != nil {
 			return err
 		}
 	}
 
-	cookies := strings.Split(md["Cookie"], ";")
-	cmd := make(map[string]string, len(cookies))
-	for _, cookie := range cookies {
-		kv := strings.Split(cookie, "=")
-		if len(kv) != 2 {
-			continue
+	cookieVals, _ := md.Get("Cookie")
+	for i := range cookieVals {
+		cookies := strings.Split(cookieVals[i], ";")
+		cmd := make(map[string]string, len(cookies))
+		for _, cookie := range cookies {
+			kv := strings.Split(cookie, "=")
+			if len(kv) != 2 {
+				continue
+			}
+			cmd[strings.TrimSpace(kv[0])] = strings.TrimSpace(kv[1])
 		}
-		cmd[strings.TrimSpace(kv[0])] = strings.TrimSpace(kv[1])
-	}
-	for idx := 0; idx < len(options.cookies)/2; idx += 2 {
-		k := http.CanonicalHeaderKey(options.cookies[idx])
-		v, ok := cmd[k]
-		if !ok {
-			continue
-		}
-		if err = rutil.SetFieldByPath(req, v, k); err != nil {
-			return err
+		for idx := 0; idx < len(options.cookies)/2; idx += 2 {
+			k := http.CanonicalHeaderKey(options.cookies[idx])
+			v, ok := cmd[k]
+
+			if !ok {
+				continue
+			}
+
+			err = rutil.SetFieldByPath(req, v, k)
+			if err != nil {
+				return err
+			}
 		}
 	}