新增登录校验

utils/util.go

 package utils
 
-import "os"
+import (
+	"encoding/json"
+	"io/ioutil"
+	"os"
+)
 
 func PathExists(path string) (bool, error) {
 	_, err := os.Stat(path)
@@ -12,3 +16,21 @@ func PathExists(path string) (bool, error) {
 	}
 	return false, err
 }
+
+// (fileSize string, lastTime string)
+func PathFileInfo(path string) string {
+	files, _ := ioutil.ReadDir(path)
+	var index int
+	var infos = make([]map[string]interface{}, len(files))
+
+	for _, file := range files {
+		infos[index] = make(map[string]interface{})
+		infos[index]["file_size"] = file.Size()
+		infos[index]["last_modify"] = file.ModTime().Unix()
+		infos[index]["file_name"] = file.Name()
+		index++
+	}
+
+	data, _ := json.Marshal(infos)
+	return string(data)
+}