transport/http: add http route (#1029)

* add http route

* fix http context

* add HTTP middleware

Co-authored-by: longXboy <longxboyhi@gmail.com>

encoding/json/json_test.go

@@ -0,0 +1,80 @@
+package json
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+)
+
+type testEmbed struct {
+	Level1a int `json:"a"`
+	Level1b int `json:"b"`
+	Level1c int `json:"c"`
+}
+
+type testMessage struct {
+	Field1 string     `json:"a"`
+	Field2 string     `json:"b"`
+	Field3 string     `json:"c"`
+	Embed  *testEmbed `json:"embed,omitempty"`
+}
+
+func TestJSON_Marshal(t *testing.T) {
+	tests := []struct {
+		input  interface{}
+		expect string
+	}{
+		{
+			input:  &testMessage{},
+			expect: `{"a":"","b":"","c":""}`,
+		},
+		{
+			input:  &testMessage{Field1: "a", Field2: "b", Field3: "c"},
+			expect: `{"a":"a","b":"b","c":"c"}`,
+		},
+	}
+	for _, v := range tests {
+		data, err := (codec{}).Marshal(v.input)
+		if err != nil {
+			t.Errorf("marshal(%#v): %s", v.input, err)
+		}
+		if got, want := string(data), v.expect; got != want {
+			if strings.Contains(want, "\n") {
+				t.Errorf("marshal(%#v):\nHAVE:\n%s\nWANT:\n%s", v.input, got, want)
+			} else {
+				t.Errorf("marshal(%#v):\nhave %#q\nwant %#q", v.input, got, want)
+			}
+		}
+	}
+}
+
+func TestJSON_Unmarshal(t *testing.T) {
+	p := &testMessage{}
+	tests := []struct {
+		input  string
+		expect interface{}
+	}{
+		{
+			input:  `{"a":"","b":"","c":""}`,
+			expect: &testMessage{},
+		},
+		{
+			input:  `{"a":"a","b":"b","c":"c"}`,
+			expect: &p,
+		},
+	}
+	for _, v := range tests {
+		want := []byte(v.input)
+		err := (codec{}).Unmarshal(want, &v.expect)
+		if err != nil {
+			t.Errorf("marshal(%#v): %s", v.input, err)
+		}
+		got, err := codec{}.Marshal(v.expect)
+		if err != nil {
+			t.Errorf("marshal(%#v): %s", v.input, err)
+		}
+		if !bytes.Equal(got, want) {
+			t.Errorf("marshal(%#v):\nhave %#q\nwant %#q", v.input, got, want)
+		}
+	}
+}