完成前后端框架搭建，完成聊天页面布局

utils/utils.go

@@ -0,0 +1,32 @@
+package utils
+
+import (
+	"math/rand"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// RandString generate rand string with specified length
+func RandString(length int) string {
+	str := "0123456789abcdefghijklmnopqrstuvwxyz"
+	data := []byte(str)
+	var result []byte
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < length; i++ {
+		result = append(result, data[r.Intn(len(data))])
+	}
+	return string(result)
+}
+
+func Long2IP(ipInt int64) string {
+	b0 := strconv.FormatInt((ipInt>>24)&0xff, 10)
+	b1 := strconv.FormatInt((ipInt>>16)&0xff, 10)
+	b2 := strconv.FormatInt((ipInt>>8)&0xff, 10)
+	b3 := strconv.FormatInt(ipInt&0xff, 10)
+	return b0 + "." + b1 + "." + b2 + "." + b3
+}
+
+func IsBlank(value string) bool {
+	return len(strings.TrimSpace(value)) == 0
+}