将工厂改成黑盒模式,降低用户使用成本

docs/README.md

@@ -49,22 +49,29 @@ now := datetime.Now()
 str := datetime.FormatDateTime(now)
 ```
 
-#### HTTP响应
+#### HTTP响应（Handler黑盒模式）
 
 ```go
-import "git.toowon.com/jimmy/go-common/http"
+import (
+    "net/http"
+    commonhttp "git.toowon.com/jimmy/go-common/http"
+)
 
-http.Success(w, data)
-http.SuccessPage(w, list, total, page, pageSize)
-http.Error(w, 1001, "业务错误")
+func GetUser(h *commonhttp.Handler) {
+    id := h.GetQueryInt64("id", 0)
+    h.Success(data)
+}
+
+http.HandleFunc("/user", commonhttp.HandleFunc(GetUser))
 ```
 
 #### 中间件
 
 ```go
 import (
+    "net/http"
     "git.toowon.com/jimmy/go-common/middleware"
-    "git.toowon.com/jimmy/go-common/http"
+    commonhttp "git.toowon.com/jimmy/go-common/http"
 )
 
 // CORS + 时区中间件
@@ -72,10 +79,13 @@ chain := middleware.NewChain(
     middleware.CORS(),
     middleware.Timezone,
 )
-handler := chain.ThenFunc(yourHandler)
 
-// 在处理器中获取时区
-timezone := http.GetTimezone(r)
+handler := chain.ThenFunc(func(w http.ResponseWriter, r *http.Request) {
+    h := commonhttp.NewHandler(w, r)
+    // 在Handler中获取时区
+    timezone := h.GetTimezone()
+    h.Success(data)
+})
 ```
 
 #### 配置管理