massive refactoring against json config parsing

proxy/vmess/inbound/config_json.go

@@ -0,0 +1,26 @@
+// +build json
+
+package inbound
+
+import (
+	"encoding/json"
+
+	"github.com/v2ray/v2ray-core/proxy/internal/config"
+	"github.com/v2ray/v2ray-core/proxy/vmess"
+)
+
+func init() {
+	config.RegisterInboundConnectionConfig("vmess",
+		func(data []byte) (interface{}, error) {
+			type JsonConfig struct {
+				Users []*vmess.User `json:"clients"`
+			}
+			jsonConfig := new(JsonConfig)
+			if err := json.Unmarshal(data, jsonConfig); err != nil {
+				return nil, err
+			}
+			return &Config{
+				AllowedUsers: jsonConfig.Users,
+			}, nil
+		})
+}