rewrite query param and not marshal empty struct

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

go.mod

@@ -2,4 +2,4 @@ module github.com/unistack-org/micro-client-http/v3
 
 go 1.16
 
-require github.com/unistack-org/micro/v3 v3.2.23
+require github.com/unistack-org/micro/v3 v3.2.24

go.sum

@@ -5,8 +5,8 @@ github.com/google/uuid v1.2.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+
 github.com/imdario/mergo v0.3.12/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/silas/dag v0.0.0-20210121180416-41cf55125c34/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
-github.com/unistack-org/micro/v3 v3.2.23 h1:kObNEKxVEioUV29nFRg4Mw4KjIXtzggc67yMF1gbXKU=
-github.com/unistack-org/micro/v3 v3.2.23/go.mod h1:iJwCWq2PECMxigfqe6TPC5GLWvj6P94Kk+PTVZGL3w8=
+github.com/unistack-org/micro/v3 v3.2.24 h1:3sQ72wy8Vap9KDD7bdLOn+dhlPT0iXSJRXhs2qHoKxA=
+github.com/unistack-org/micro/v3 v3.2.24/go.mod h1:iJwCWq2PECMxigfqe6TPC5GLWvj6P94Kk+PTVZGL3w8=
 golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4/go.mod h1:RBQZq4jEuRlivfhVLdyRGr576XBO4/greRjx4P4O3yc=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210315160823-c6e025ad8005/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

http.go

@@ -71,13 +71,21 @@ func newRequest(addr string, req client.Request, cf codec.Codec, msg interface{}
 		return nil, errors.BadRequest("go.micro.client", err.Error())
 	}
 
-	hreq.URL.Path = path
-	// marshal request
-	b, err := cf.Marshal(nmsg)
+	hreq.URL, err = url.Parse(addr + path)
 	if err != nil {
 		return nil, errors.BadRequest("go.micro.client", err.Error())
 	}
 
+	var b []byte
+
+	// marshal request is struct not empty
+	if nmsg != nil {
+		b, err = cf.Marshal(nmsg)
+		if err != nil {
+			return nil, errors.BadRequest("go.micro.client", err.Error())
+		}
+	}
+
 	hreq.Body = ioutil.NopCloser(bytes.NewBuffer(b))
 	hreq.ContentLength = int64(len(b))
 

util.go

@@ -92,6 +92,10 @@ func newPathRequest(path string, method string, body string, msg interface{}) (s
 		idx++
 	}
 
+	if rutil.IsZero(nmsg) {
+		return b.String(), nil, nil
+	}
+
 	return b.String(), nmsg, nil
 }