on error try to return original message to client

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

util.go

@@ -12,6 +12,7 @@ import (
 
 	"github.com/unistack-org/micro/v3/client"
 	"github.com/unistack-org/micro/v3/errors"
+	"github.com/unistack-org/micro/v3/logger"
 	rutil "github.com/unistack-org/micro/v3/util/reflect"
 	util "github.com/unistack-org/micro/v3/util/router"
 )
@@ -113,7 +114,7 @@ func newPathRequest(path string, method string, body string, msg interface{}, ta
 			continue
 		}
 
-		// nolint: gocritic
+		// nolint: gocritic, nestif
 		if _, ok := fieldsmap[t.name]; ok {
 			switch val.Type().Kind() {
 			case reflect.Slice:
@@ -125,7 +126,9 @@ func newPathRequest(path string, method string, body string, msg interface{}, ta
 				fieldsmap[t.name] = fmt.Sprintf("%v", val.Interface())
 			}
 		} else if (body == "*" || body == t.name) && method != http.MethodGet {
-			tnmsg.Field(i).Set(val)
+			if tnmsg.Field(i).CanSet() {
+				tnmsg.Field(i).Set(val)
+			}
 		} else {
 			if val.Type().Kind() == reflect.Slice {
 				for idx := 0; idx < val.Len(); idx++ {
@@ -209,7 +212,17 @@ func (h *httpClient) parseRsp(ctx context.Context, hrsp *http.Response, rsp inte
 		}
 
 		cf, cerr := h.newCodec(ct)
-		if cerr != nil {
+		if hrsp.StatusCode >= 400 && cerr != nil {
+			var buf []byte
+			if hrsp.Body != nil {
+				buf, err = io.ReadAll(hrsp.Body)
+				if err != nil && h.opts.Logger.V(logger.ErrorLevel) {
+					h.opts.Logger.Errorf(ctx, "failed to read body: %v", err)
+				}
+			}
+			// response like text/plain or something else, return original error
+			return errors.New("go.micro.client", string(buf), int32(hrsp.StatusCode))
+		} else if cerr != nil {
 			return errors.InternalServerError("go.micro.client", cerr.Error())
 		}