diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index c9944a1..7396d8d 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,12 +2,8 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="7cf7b6b3-0082-44ef-bb0f-bfcc57e19eb1" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/utils/const.go" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/controller/file.go" beforeDir="false" afterPath="$PROJECT_DIR$/controller/file.go" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/controller/hardware.go" beforeDir="false" afterPath="$PROJECT_DIR$/controller/hardware.go" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/main.go" beforeDir="false" afterPath="$PROJECT_DIR$/main.go" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/model/hardware.go" beforeDir="false" afterPath="$PROJECT_DIR$/model/hardware.go" afterDir="false" />
     </list>
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
diff --git a/controller/file.go b/controller/file.go
index 3fd3c19..9ca10b3 100644
--- a/controller/file.go
+++ b/controller/file.go
@@ -1,8 +1,11 @@
 package controller
 
 import (
+	"github.com/disintegration/imaging"
 	"github.com/gin-gonic/gin"
 	uuid "github.com/satori/go.uuid"
+	"image"
+	"image/color"
 	"io/ioutil"
 	"log"
 	"net/http"
@@ -70,7 +73,7 @@ func (this *FileController) OnUpload(c *gin.Context) {
 	}
 }
 
-func (this *FileController) OnDownLoad(c *gin.Context) {
+func (this *FileController) OnThumbnail(c *gin.Context) {
 	resp := RespBase{Msg:"FAIL",Status: 211}
 
 	fileName := c.Param("file")
@@ -79,7 +82,36 @@ func (this *FileController) OnDownLoad(c *gin.Context) {
 
 		return
 	}
-	file,e := os.Open("/home/ubuntu/api/bin/image/" +fileName)
+	// input files
+	files := []string{"/home/ubuntu/api/bin/image/" +fileName}
+
+	// load images and make 100x100 thumbnails of them
+	var thumbnails []image.Image
+	for _, file := range files {
+		img, err := imaging.Open(file)
+		if err != nil {
+			panic(err)
+		}
+		thumb := imaging.Thumbnail(img, 100, 100, imaging.CatmullRom)
+		thumbnails = append(thumbnails, thumb)
+	}
+
+	// create a new blank image
+	dst := imaging.New(100*len(thumbnails), 100, color.NRGBA{0, 0, 0, 0})
+
+	// paste thumbnails into the new image side by side
+	for i, thumb := range thumbnails {
+		dst = imaging.Paste(dst, thumb, image.Pt(i*100, 0))
+	}
+
+	// save the combined image to file
+	err := imaging.Save(dst, "/home/ubuntu/api/bin/image/thumbnail_" + fileName)
+	if err != nil {
+		log.Print(err.Error())
+		return
+	}
+	// open file
+	file,e := os.Open("/home/ubuntu/api/bin/image/thumbnail_" + fileName)
 	if nil != e{
 		log.Print(e.Error())
 		c.JSON(200,resp)
@@ -101,7 +133,7 @@ func (this *FileController) OnDownLoad(c *gin.Context) {
 }
 
 
-func (this *FileController) OnThumbnail(c *gin.Context) {
+func (this *FileController)  OnDownLoad(c *gin.Context) {
 	resp := RespBase{Msg:"FAIL",Status: 211}
 
 	fileName := c.Param("file")