diff --git a/logging/Readme.md b/logging/Readme.md
new file mode 100644
index 0000000..b992f20
--- /dev/null
+++ b/logging/Readme.md
@@ -0,0 +1,50 @@
+## Ghi lỗi ra file log
+
+1. Hàm bắt lỗi và ghi ra file log
+```go
+func LogError(c *gin.Context, message string) {
+	var errorInfo ErrorInfo
+	errorInfo.Time = time.Now()
+	errorInfo.Path = c.FullPath()
+	errorInfo.Method = c.Request.Method
+
+	var log = logrus.New()
+	log.Out = os.Stdout
+	file, err := os.OpenFile("log/logging.log", os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0666)
+	if err == nil {
+		log.Out = file
+	} else {
+		log.Println(err)
+	}
+
+	log.WithFields(logrus.Fields{
+		"Path":    errorInfo.Path,
+		"Method": errorInfo.Method,
+	}).Error(message)
+}
+```
+
+2. Trong mỗi route, gọi hàm **LogError** khi kiểm tra lỗi, ví dụ như trong **POST /upload-video**
+```go
+file, err := c.FormFile("video-file")
+if err != nil {
+	c.JSON(http.StatusBadRequest, err.Error())
+	LogError(c, err.Error())
+	return
+}
+
+fileType := file.Header["Content-Type"][0]
+
+if GetAllowFormat(fileType, allowedMediaType) == "" {
+	c.JSON(http.StatusBadRequest, "Định dạng không hợp lệ. Yêu cầu: mp4")
+	LogError(c, "Định dạng không hợp lệ. Yêu cầu: mp4")
+	return
+}
+
+err = c.SaveUploadedFile(file, path.Join("./upload", file.Filename))
+if err != nil {
+	c.JSON(http.StatusInternalServerError, err.Error())
+	LogError(c, err.Error())
+	return
+}
+```
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diff --git a/logging/controller/base.go b/logging/controller/base.go
new file mode 100644
index 0000000..8eba834
--- /dev/null
+++ b/logging/controller/base.go
@@ -0,0 +1,48 @@
+package controller
+
+import (
+	"os"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+)
+
+var allowedMediaType = []string{"video/mp4"}
+
+type ErrorInfo struct {
+	Time  time.Time
+	Path  string
+	Method string
+}
+
+func GetAllowFormat(format string, allowFormat []string) string {
+	var allow string
+	for _, item := range allowFormat {
+		if format == item {
+			allow = item
+		}
+	}
+	return allow
+}
+
+func LogError(c *gin.Context, message string) {
+	var errorInfo ErrorInfo
+	errorInfo.Time = time.Now()
+	errorInfo.Path = c.FullPath()
+	errorInfo.Method = c.Request.Method
+
+	var log = logrus.New()
+	log.Out = os.Stdout
+	file, err := os.OpenFile("log/logging.log", os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0666)
+	if err == nil {
+		log.Out = file
+	} else {
+		log.Println(err)
+	}
+
+	log.WithFields(logrus.Fields{
+		"Path":    errorInfo.Path,
+		"Method": errorInfo.Method,
+	}).Error(message)
+}
diff --git a/logging/controller/controller.go b/logging/controller/controller.go
new file mode 100644
index 0000000..55bb72c
--- /dev/null
+++ b/logging/controller/controller.go
@@ -0,0 +1,36 @@
+package controller
+
+import (
+	"net/http"
+	"path"
+
+	"github.com/gin-gonic/gin"
+)
+
+func HomePage(c *gin.Context) {
+	c.HTML(http.StatusOK, "index.html", gin.H{})
+}
+
+func UploadVideo(c *gin.Context) {
+	file, err := c.FormFile("video-file")
+	if err != nil {
+		c.JSON(http.StatusBadRequest, err.Error())
+		LogError(c, err.Error())
+		return
+	}
+
+	fileType := file.Header["Content-Type"][0]
+
+	if GetAllowFormat(fileType, allowedMediaType) == "" {
+		c.JSON(http.StatusBadRequest, "Định dạng không hợp lệ. Yêu cầu: mp4")
+		LogError(c, "Định dạng không hợp lệ. Yêu cầu: mp4")
+		return
+	}
+
+	err = c.SaveUploadedFile(file, path.Join("./upload", file.Filename))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, err.Error())
+		LogError(c, err.Error())
+		return
+	}
+}
diff --git a/logging/log/logging.log b/logging/log/logging.log
new file mode 100644
index 0000000..5140a21
--- /dev/null
+++ b/logging/log/logging.log
@@ -0,0 +1,4 @@
+time="2019-10-12T09:10:53+07:00" level=error msg="Định dạng không hợp lệ. Yêu cầu: mp4" Error="Định dạng không hợp lệ. Yêu cầu: mp4" Path=/upload-video Time="2019-10-12 09:10:53.860303 +0700 +07 m=+19.269711617"
+time="2019-10-12T09:12:47+07:00" level=error msg="Định dạng không hợp lệ. Yêu cầu: mp4" Path=/upload-video Time="2019-10-12 09:12:47.071071 +0700 +07 m=+8.262930654"
+time="2019-10-12T09:14:08+07:00" level=error msg="Định dạng không hợp lệ. Yêu cầu: mp4" Path=/upload-video
+time="2019-10-12T09:17:06+07:00" level=error msg="Định dạng không hợp lệ. Yêu cầu: mp4" Method=POST Path=/upload-video
diff --git a/logging/main.go b/logging/main.go
new file mode 100644
index 0000000..bf5d147
--- /dev/null
+++ b/logging/main.go
@@ -0,0 +1,16 @@
+package main
+
+import (
+	"gin-gonic/logging/controller"
+
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	router := gin.Default()
+	router.LoadHTMLGlob("view/*")
+
+	router.GET("/", controller.HomePage)
+	router.POST("/upload-video", controller.UploadVideo)
+	router.Run(":8085")
+}
diff --git a/logging/view/index.html b/logging/view/index.html
new file mode 100644
index 0000000..43868c4
--- /dev/null
+++ b/logging/view/index.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <title>Upload file</title>
+</head>
+<body>
+    <h2>Upload video</h2>
+    <form action="/upload-video" method="POST" enctype="multipart/form-data">
+        <input type="file" name="video-file" accept="video/*">
+        <input type="submit">
+    </form>
+</body>
+</html>
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