diff --git a/providers/http/config.go b/providers/http/config.go
index 8c743ea..16dc929 100644
--- a/providers/http/config.go
+++ b/providers/http/config.go
@@ -5,16 +5,21 @@ import (
 )
 
 type Config struct {
-	Static    string
-	Host      string
-	Port      uint
-	Https     bool
-	HttpsCert string
-	HttpKey   string
-	Cors      struct {
-		Mode      string
-		Whitelist []Whitelist
-	}
+	Static *string
+	Host   *string
+	Port   uint
+	Tls    *Tls
+	Cors   *Cors
+}
+
+type Tls struct {
+	Cert string
+	Key  string
+}
+
+type Cors struct {
+	Mode      string
+	Whitelist []Whitelist
 }
 
 type Whitelist struct {
@@ -26,7 +31,10 @@ type Whitelist struct {
 }
 
 func (h *Config) Address() string {
-	return fmt.Sprintf("%s:%d", h.Host, h.Port)
+	if h.Host == nil {
+		return h.PortString()
+	}
+	return fmt.Sprintf("%s:%d", *h.Host, h.Port)
 }
 
 func (h *Config) PortString() string {
diff --git a/providers/http/env.go b/providers/http/env.go
new file mode 100644
index 0000000..97548df
--- /dev/null
+++ b/providers/http/env.go
@@ -0,0 +1,44 @@
+package http
+
+import (
+	"log"
+
+	"github.com/rogeecn/atom/utils/fs"
+	"github.com/spf13/viper"
+)
+
+const DefaultPrefix = "HTTP"
+
+func AutoLoadConfig() *Config {
+	return LoadConfig("", DefaultPrefix)
+}
+
+func LoadConfig(file, envPrefix string) *Config {
+	if file == "" {
+		file = "config.toml"
+	}
+
+	if envPrefix == "" {
+		envPrefix = DefaultPrefix
+	}
+
+	viper.SetEnvPrefix(envPrefix)
+	viper.AutomaticEnv()
+
+	if !fs.FileExist(file) {
+		return &Config{}
+	}
+
+	// load file
+	viper.SetConfigFile(file)
+	if err := viper.ReadInConfig(); err != nil {
+		log.Fatal(err)
+	}
+
+	var config Config
+	if err := viper.Unmarshal(&config); err != nil {
+		log.Fatal(err)
+	}
+
+	return &config
+}
diff --git a/providers/http/gin/engine.go b/providers/http/gin/engine.go
index 8f2cbcf..0f26c22 100644
--- a/providers/http/gin/engine.go
+++ b/providers/http/gin/engine.go
@@ -26,8 +26,8 @@ func (e *Service) GetEngine() interface{} {
 }
 
 func (e *Service) Serve() error {
-	if e.conf.Https {
-		return e.Engine.RunTLS(e.conf.PortString(), e.conf.HttpsCert, e.conf.HttpKey)
+	if e.conf.Tls != nil {
+		return e.Engine.RunTLS(e.conf.PortString(), e.conf.Tls.Cert, e.conf.Tls.Key)
 	}
 	return e.Engine.Run(e.conf.PortString())
 }