fix: solve wrong print width

Author: li-jin-gou

example/main.go

@@ -0,0 +1,17 @@
+package main
+
+import "github.com/gofiber/fiber/v2"
+import "log"
+
+func main() {
+	// Steps to reproduce
+	app := fiber.New(fiber.Config{
+		CaseSensitive: true,
+		StrictRouting: true,
+		GETOnly:       false,
+		ServerHeader:  "01-Matrix",
+		AppName:      "零壹矩阵管理平台 V0.3",
+	})
+
+	log.Fatal(app.Listen(":3000"))
+}

go.mod

@@ -3,13 +3,15 @@ module github.com/gofiber/fiber/v2
 go 1.19
 
 require (
+	github.com/mattn/go-runewidth v0.0.14
 	github.com/valyala/fasthttp v1.40.0
 	golang.org/x/sys v0.0.0-20220227234510-4e6760a101f9
 )
 
 require (
 	github.com/andybalholm/brotli v1.0.4 // indirect
 	github.com/klauspost/compress v1.15.0 // indirect
+	github.com/rivo/uniseg v0.2.0 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/tcplisten v1.0.0 // indirect
 )

go.sum

@@ -2,6 +2,10 @@ github.com/andybalholm/brotli v1.0.4 h1:V7DdXeJtZscaqfNuAdSRuRFzuiKlHSC/Zh3zl9qY
 github.com/andybalholm/brotli v1.0.4/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
 github.com/klauspost/compress v1.15.0 h1:xqfchp4whNFxn5A4XFyyYtitiWI8Hy5EW59jEwcyL6U=
 github.com/klauspost/compress v1.15.0/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=
+github.com/mattn/go-runewidth v0.0.14 h1:+xnbZSEeDbOIg5/mE6JF0w6n9duR1l3/WmbinWVwUuU=
+github.com/mattn/go-runewidth v0.0.14/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
 github.com/valyala/fasthttp v1.40.0 h1:CRq/00MfruPGFLTQKY8b+8SfdK60TxNztjRMnH0t1Yc=

listen.go

@@ -22,6 +22,7 @@ import (
 
 	"github.com/gofiber/fiber/v2/internal/colorable"
 	"github.com/gofiber/fiber/v2/internal/isatty"
+	"github.com/mattn/go-runewidth"
 )
 
 // Listener can be used to pass a custom listener.
@@ -238,11 +239,11 @@ func (app *App) startupMessage(addr string, tls bool, pids string) {
 	}
 
 	centerValue := func(s string, width int) string {
-		pad := strconv.Itoa((width - len([]rune(s))) / 2)
+		pad := strconv.Itoa((width - runewidth.StringWidth(s)) / 2)
 		str := fmt.Sprintf("%"+pad+"s", " ")
 		str += fmt.Sprintf("%s%s%s", colors.Cyan, s, colors.Black)
 		str += fmt.Sprintf("%"+pad+"s", " ")
-		if len([]rune(s))-10 < width && len([]rune(s))%2 == 0 {
+		if runewidth.StringWidth(s)-10 < width && runewidth.StringWidth(s)%2 == 0 {
 			// add an ending space if the length of str is even and str is not too long
 			str += " "
 		}