+ support custom render, pongo2 tested

context.go

@@ -341,6 +341,11 @@ func (c *Context) HTML(code int, name string, obj interface{}) {
 	c.Render(code, instance)
 }
 
+func (c *Context) CustomRender(code int, name string, obj interface{}) {
+	instance := c.engine.CustomRender.Instance(name, obj)
+	c.Render(code, instance)
+}
+
 // IndentedJSON serializes the given struct as pretty JSON (indented + endlines) into the response body.
 // It also sets the Content-Type as "application/json".
 // WARNING: we recommend to use this only for development propuses since printing pretty JSON is

gin.go

@@ -44,13 +44,14 @@ type (
 	// Create an instance of Engine, by using New() or Default()
 	Engine struct {
 		RouterGroup
-		HTMLRender  render.HTMLRender
-		allNoRoute  HandlersChain
-		allNoMethod HandlersChain
-		noRoute     HandlersChain
-		noMethod    HandlersChain
-		pool        sync.Pool
-		trees       methodTrees
+		HTMLRender   render.HTMLRender
+		CustomRender render.CustomRender
+		allNoRoute   HandlersChain
+		allNoMethod  HandlersChain
+		noRoute      HandlersChain
+		noMethod     HandlersChain
+		pool         sync.Pool
+		trees        methodTrees
 
 		// Enables automatic redirection if the current route can't be matched but a
 		// handler for the path with (without) the trailing slash exists.
@@ -147,6 +148,10 @@ func (engine *Engine) SetHTMLTemplate(templ *template.Template) {
 	engine.HTMLRender = render.HTMLProduction{Template: templ}
 }
 
+func (engine *Engine) SetCustomRenderFunc(f render.CustomRenderFunc) {
+	engine.CustomRender = render.CustomRenderProduction{f}
+}
+
 // Adds handlers for NoRoute. It return a 404 code by default.
 func (engine *Engine) NoRoute(handlers ...HandlerFunc) {
 	engine.noRoute = handlers

render/custom_render.go

@@ -0,0 +1,39 @@
+// Copyright 2014 Manu Martinez-Almeida.  All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
+package render
+
+import (
+	"net/http"
+)
+
+type (
+	CustomRenderFunc func(http.ResponseWriter, string, interface{}) error
+
+	CustomRender interface {
+		Instance(string, interface{}) Render
+	}
+
+	CustomRenderProduction struct {
+		RenderFunc    CustomRenderFunc
+	}
+
+	Custom struct {
+		RenderFunc CustomRenderFunc
+		Name       string
+		Data       interface{}
+	}
+)
+
+func (r CustomRenderProduction) Instance(name string, data interface{}) Render {
+	return Custom{
+		RenderFunc: r.RenderFunc,
+		Name: name,
+		Data: data,
+	}
+}
+
+func (r Custom) Render(w http.ResponseWriter) error {
+	return r.RenderFunc(w, r.Name, r.Data)
+}