Some fixes and improvements (#1077)

* [refactor] api controller

* [update] use status code for jsonMsg and 401 to unauthorize

* [update] handle response status code via axios

* [lint] all .go files

util/common/err.go

@@ -3,6 +3,7 @@ package common
 import (
 	"errors"
 	"fmt"
+
 	"x-ui/logger"
 )
 

util/random/random.go

@@ -5,12 +5,14 @@ import (
 	"time"
 )
 
-var numSeq [10]rune
-var lowerSeq [26]rune
-var upperSeq [26]rune
-var numLowerSeq [36]rune
-var numUpperSeq [36]rune
-var allSeq [62]rune
+var (
+	numSeq      [10]rune
+	lowerSeq    [26]rune
+	upperSeq    [26]rune
+	numLowerSeq [36]rune
+	numUpperSeq [36]rune
+	allSeq      [62]rune
+)
 
 func init() {
 	rand.Seed(time.Now().UnixNano())