initial commit

backend/util/common/err.go

@@ -0,0 +1,27 @@
+package common
+
+import (
+	"errors"
+	"fmt"
+	"s-ui/logger"
+)
+
+func NewErrorf(format string, a ...interface{}) error {
+	msg := fmt.Sprintf(format, a...)
+	return errors.New(msg)
+}
+
+func NewError(a ...interface{}) error {
+	msg := fmt.Sprintln(a...)
+	return errors.New(msg)
+}
+
+func Recover(msg string) interface{} {
+	panicErr := recover()
+	if panicErr != nil {
+		if msg != "" {
+			logger.Error(msg, "panic:", panicErr)
+		}
+	}
+	return panicErr
+}

backend/util/common/random.go

@@ -0,0 +1,13 @@
+package common
+
+import "math/rand"
+
+var allSeq [62]rune
+
+func Random(n int) string {
+	runes := make([]rune, n)
+	for i := 0; i < n; i++ {
+		runes[i] = allSeq[rand.Intn(len(allSeq))]
+	}
+	return string(runes)
+}