From 6e2957df824d25d14aad9f9890bac448c632d539 Mon Sep 17 00:00:00 2001
From: Fareed Dudhia <fareeddudhia@googlemail.com>
Date: Wed, 16 Jul 2014 19:16:15 +0100
Subject: [PATCH] Added HEAD to RouterGroup.Static

---
 gin.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/gin.go b/gin.go
index 4d768723..67448635 100644
--- a/gin.go
+++ b/gin.go
@@ -11,8 +11,11 @@ import (
 	"html/template"
 	"log"
 	"math"
+	"mime"
 	"net/http"
+	"os"
 	"path"
+	"path/filepath"
 	"sync"
 )
 
@@ -309,6 +312,19 @@ func (group *RouterGroup) Static(p, root string) {
 		fileServer.ServeHTTP(c.Writer, c.Request)
 		c.Request.URL.Path = original
 	})
+
+	group.HEAD(p, func(c *Context) {
+		fp := path.Join(root, c.Params.ByName("filepath"))
+
+		info, err := os.Stat(fp)
+		if err != nil || info == nil {
+			c.Abort(404)
+		} else {
+			c.Writer.Header().Set("Content-Type", mime.TypeByExtension(filepath.Ext(fp)))
+			c.Writer.Header().Set("Last-Modified", info.ModTime().Format(http.TimeFormat))
+			c.Abort(200)
+		}
+	})
 }
 
 func (group *RouterGroup) combineHandlers(handlers []HandlerFunc) []HandlerFunc {