👷 v3 (ci): fix some linter warnings

addon/retry/config.go

@@ -1,6 +1,8 @@
 package retry
 
-import "time"
+import (
+	"time"
+)
 
 // Config defines the config for addon.
 type Config struct {

app.go

@@ -821,7 +821,7 @@ func (app *App) Config() Config {
 func (app *App) Handler() fasthttp.RequestHandler { //revive:disable-line:confusing-naming // Having both a Handler() (uppercase) and a handler() (lowercase) is fine. TODO: Use nolint:revive directive instead. See https://github.com/golangci/golangci-lint/issues/3476
 	// prepare the server for the start
 	app.startupProcess()
-	return app.handler
+	return app.requestHandler
 }
 
 // Stack returns the raw router stack.
@@ -981,7 +981,7 @@ func (app *App) init() *App {
 	}
 
 	// fasthttp server settings
-	app.server.Handler = app.handler
+	app.server.Handler = app.requestHandler
 	app.server.Name = app.config.ServerHeader
 	app.server.Concurrency = app.config.Concurrency
 	app.server.NoDefaultDate = app.config.DisableDefaultDate
@@ -1041,7 +1041,10 @@ func (app *App) ErrorHandler(ctx Ctx, err error) error {
 // errors before calling the application's error handler method.
 func (app *App) serverErrorHandler(fctx *fasthttp.RequestCtx, err error) {
 	// Acquire Ctx with fasthttp request from pool
-	c := app.AcquireCtx().(*DefaultCtx)
+	c, ok := app.AcquireCtx().(*DefaultCtx)
+	if !ok {
+		panic(fmt.Errorf("failed to type-assert to *DefaultCtx"))
+	}
 	c.Reset(fctx)
 
 	defer app.ReleaseCtx(c)

app_test.go

@@ -257,7 +257,7 @@ func Test_App_serverErrorHandler_Internal_Error(t *testing.T) {
 	t.Parallel()
 	app := New()
 	msg := "test err"
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	app.serverErrorHandler(c.fasthttp, errors.New(msg))
 	require.Equal(t, string(c.fasthttp.Response.Body()), msg)
@@ -1294,7 +1294,7 @@ func Benchmark_AcquireCtx(b *testing.B) {
 // go test -v -run=^$ -bench=Benchmark_NewError -benchmem -count=4
 func Benchmark_NewError(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		NewError(200, "test")
+		NewError(200, "test") //nolint:errcheck // not needed
 	}
 }
 

bind_test.go

@@ -1,3 +1,4 @@
+//nolint:wrapcheck,tagliatelle,bodyclose // We must not wrap errors in tests
 package fiber
 
 import (
@@ -628,6 +629,8 @@ func Test_Bind_RespHeader_Map(t *testing.T) {
 
 // go test -v  -run=^$ -bench=Benchmark_Bind_Query -benchmem -count=4
 func Benchmark_Bind_Query(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -643,13 +646,15 @@ func Benchmark_Bind_Query(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		c.Bind().Query(q)
+		err = c.Bind().Query(q)
 	}
-	require.Nil(b, c.Bind().Query(q))
+	require.Nil(b, err)
 }
 
 // go test -v  -run=^$ -bench=Benchmark_Bind_Query_Map -benchmem -count=4
 func Benchmark_Bind_Query_Map(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -660,13 +665,15 @@ func Benchmark_Bind_Query_Map(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		c.Bind().Query(&q)
+		err = c.Bind().Query(&q)
 	}
-	require.Nil(b, c.Bind().Query(&q))
+	require.Nil(b, err)
 }
 
 // go test -v  -run=^$ -bench=Benchmark_Bind_Query_WithParseParam -benchmem -count=4
 func Benchmark_Bind_Query_WithParseParam(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -687,14 +694,16 @@ func Benchmark_Bind_Query_WithParseParam(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		c.Bind().Query(cq)
+		err = c.Bind().Query(cq)
 	}
 
-	require.Nil(b, c.Bind().Query(cq))
+	require.Nil(b, err)
 }
 
 // go test -v  -run=^$ -bench=Benchmark_Bind_Query_Comma -benchmem -count=4
 func Benchmark_Bind_Query_Comma(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -711,13 +720,15 @@ func Benchmark_Bind_Query_Comma(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		c.Bind().Query(q)
+		err = c.Bind().Query(q)
 	}
-	require.Nil(b, c.Bind().Query(q))
+	require.Nil(b, err)
 }
 
 // go test -v  -run=^$ -bench=Benchmark_Bind_Header -benchmem -count=4
 func Benchmark_Bind_Header(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -737,13 +748,14 @@ func Benchmark_Bind_Header(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		c.Bind().Header(q)
+		err = c.Bind().Header(q)
 	}
-	require.Nil(b, c.Bind().Header(q))
+	require.Nil(b, err)
 }
 
 // go test -v  -run=^$ -bench=Benchmark_Bind_Header_Map -benchmem -count=4
 func Benchmark_Bind_Header_Map(b *testing.B) {
+	var err error
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -758,13 +770,15 @@ func Benchmark_Bind_Header_Map(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		c.Bind().Header(&q)
+		err = c.Bind().Header(&q)
 	}
-	require.Nil(b, c.Bind().Header(&q))
+	require.Nil(b, err)
 }
 
 // go test -v  -run=^$ -bench=Benchmark_Bind_RespHeader -benchmem -count=4
 func Benchmark_Bind_RespHeader(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -784,13 +798,14 @@ func Benchmark_Bind_RespHeader(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		c.Bind().RespHeader(q)
+		err = c.Bind().RespHeader(q)
 	}
-	require.Nil(b, c.Bind().RespHeader(q))
+	require.Nil(b, err)
 }
 
 // go test -v  -run=^$ -bench=Benchmark_Bind_RespHeader_Map -benchmem -count=4
 func Benchmark_Bind_RespHeader_Map(b *testing.B) {
+	var err error
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -805,9 +820,9 @@ func Benchmark_Bind_RespHeader_Map(b *testing.B) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		c.Bind().RespHeader(&q)
+		err = c.Bind().RespHeader(&q)
 	}
-	require.Nil(b, c.Bind().RespHeader(&q))
+	require.Nil(b, err)
 }
 
 // go test -run Test_Bind_Body
@@ -823,8 +838,10 @@ func Test_Bind_Body(t *testing.T) {
 	{
 		var gzipJSON bytes.Buffer
 		w := gzip.NewWriter(&gzipJSON)
-		_, _ = w.Write([]byte(`{"name":"john"}`))
-		_ = w.Close()
+		_, err := w.Write([]byte(`{"name":"john"}`))
+		require.NoError(t, err)
+		err = w.Close()
+		require.NoError(t, err)
 
 		c.Request().Header.SetContentType(MIMEApplicationJSON)
 		c.Request().Header.Set(HeaderContentEncoding, "gzip")
@@ -938,6 +955,8 @@ func Test_Bind_Body_WithSetParserDecoder(t *testing.T) {
 
 // go test -v -run=^$ -bench=Benchmark_Bind_Body_JSON -benchmem -count=4
 func Benchmark_Bind_Body_JSON(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -954,14 +973,16 @@ func Benchmark_Bind_Body_JSON(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		_ = c.Bind().Body(d)
+		err = c.Bind().Body(d)
 	}
-	require.Nil(b, c.Bind().Body(d))
+	require.Nil(b, err)
 	require.Equal(b, "john", d.Name)
 }
 
 // go test -v -run=^$ -bench=Benchmark_Bind_Body_XML -benchmem -count=4
 func Benchmark_Bind_Body_XML(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -978,14 +999,16 @@ func Benchmark_Bind_Body_XML(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		_ = c.Bind().Body(d)
+		err = c.Bind().Body(d)
 	}
-	require.Nil(b, c.Bind().Body(d))
+	require.Nil(b, err)
 	require.Equal(b, "john", d.Name)
 }
 
 // go test -v -run=^$ -bench=Benchmark_Bind_Body_Form -benchmem -count=4
 func Benchmark_Bind_Body_Form(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -1002,14 +1025,16 @@ func Benchmark_Bind_Body_Form(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		_ = c.Bind().Body(d)
+		err = c.Bind().Body(d)
 	}
-	require.Nil(b, c.Bind().Body(d))
+	require.Nil(b, err)
 	require.Equal(b, "john", d.Name)
 }
 
 // go test -v -run=^$ -bench=Benchmark_Bind_Body_MultipartForm -benchmem -count=4
 func Benchmark_Bind_Body_MultipartForm(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -1027,14 +1052,16 @@ func Benchmark_Bind_Body_MultipartForm(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		_ = c.Bind().Body(d)
+		err = c.Bind().Body(d)
 	}
-	require.Nil(b, c.Bind().Body(d))
+	require.Nil(b, err)
 	require.Equal(b, "john", d.Name)
 }
 
 // go test -v -run=^$ -bench=Benchmark_Bind_Body_Form_Map -benchmem -count=4
 func Benchmark_Bind_Body_Form_Map(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -1048,9 +1075,9 @@ func Benchmark_Bind_Body_Form_Map(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		_ = c.Bind().Body(&d)
+		err = c.Bind().Body(&d)
 	}
-	require.Nil(b, c.Bind().Body(&d))
+	require.Nil(b, err)
 	require.Equal(b, "john", d["name"])
 }
 
@@ -1064,9 +1091,7 @@ func Test_Bind_URI(t *testing.T) {
 			UserID uint `uri:"userId"`
 			RoleID uint `uri:"roleId"`
 		}
-		var (
-			d = new(Demo)
-		)
+		d := new(Demo)
 		if err := c.Bind().URI(d); err != nil {
 			t.Fatal(err)
 		}
@@ -1074,8 +1099,10 @@ func Test_Bind_URI(t *testing.T) {
 		require.Equal(t, uint(222), d.RoleID)
 		return nil
 	})
-	app.Test(httptest.NewRequest(MethodGet, "/test1/111/role/222", nil))
-	app.Test(httptest.NewRequest(MethodGet, "/test2/111/role/222", nil))
+	_, err := app.Test(httptest.NewRequest(MethodGet, "/test1/111/role/222", nil))
+	require.NoError(t, err)
+	_, err = app.Test(httptest.NewRequest(MethodGet, "/test2/111/role/222", nil))
+	require.NoError(t, err)
 }
 
 // go test -run Test_Bind_URI_Map
@@ -1093,14 +1120,18 @@ func Test_Bind_URI_Map(t *testing.T) {
 		require.Equal(t, uint(222), d["roleId"])
 		return nil
 	})
-	app.Test(httptest.NewRequest(MethodGet, "/test1/111/role/222", nil))
-	app.Test(httptest.NewRequest(MethodGet, "/test2/111/role/222", nil))
+	_, err := app.Test(httptest.NewRequest(MethodGet, "/test1/111/role/222", nil))
+	require.NoError(t, err)
+	_, err = app.Test(httptest.NewRequest(MethodGet, "/test2/111/role/222", nil))
+	require.NoError(t, err)
 }
 
 // go test -v -run=^$ -bench=Benchmark_Bind_URI -benchmem -count=4
 func Benchmark_Bind_URI(b *testing.B) {
+	var err error
+
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	c.route = &Route{
 		Params: []string{
@@ -1122,9 +1153,10 @@ func Benchmark_Bind_URI(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		c.Bind().URI(&res)
+		err = c.Bind().URI(&res)
 	}
 
+	require.NoError(b, err)
 	require.Equal(b, "john", res.Param1)
 	require.Equal(b, "doe", res.Param2)
 	require.Equal(b, "is", res.Param3)
@@ -1133,8 +1165,10 @@ func Benchmark_Bind_URI(b *testing.B) {
 
 // go test -v -run=^$ -bench=Benchmark_Bind_URI_Map -benchmem -count=4
 func Benchmark_Bind_URI_Map(b *testing.B) {
+	var err error
+
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	c.route = &Route{
 		Params: []string{
@@ -1151,9 +1185,10 @@ func Benchmark_Bind_URI_Map(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		c.Bind().URI(&res)
+		err = c.Bind().URI(&res)
 	}
 
+	require.NoError(b, err)
 	require.Equal(b, "john", res["param1"])
 	require.Equal(b, "doe", res["param2"])
 	require.Equal(b, "is", res["param3"])
@@ -1405,6 +1440,8 @@ func Test_Bind_Cookie_Schema(t *testing.T) {
 
 // go test -v  -run=^$ -bench=Benchmark_Bind_Cookie -benchmem -count=4
 func Benchmark_Bind_Cookie(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -1425,13 +1462,15 @@ func Benchmark_Bind_Cookie(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		c.Bind().Cookie(q)
+		err = c.Bind().Cookie(q)
 	}
-	require.Nil(b, c.Bind().Cookie(q))
+	require.Nil(b, err)
 }
 
 // go test -v  -run=^$ -bench=Benchmark_Bind_Cookie_Map -benchmem -count=4
 func Benchmark_Bind_Cookie_Map(b *testing.B) {
+	var err error
+
 	app := New()
 	c := app.NewCtx(&fasthttp.RequestCtx{})
 
@@ -1447,9 +1486,9 @@ func Benchmark_Bind_Cookie_Map(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		c.Bind().Cookie(&q)
+		err = c.Bind().Cookie(&q)
 	}
-	require.Nil(b, c.Bind().Cookie(&q))
+	require.Nil(b, err)
 }
 
 // custom binder for testing
@@ -1515,10 +1554,13 @@ func (*structValidator) Engine() any {
 
 func (*structValidator) ValidateStruct(out any) error {
 	out = reflect.ValueOf(out).Elem().Interface()
-	sq := out.(simpleQuery)
+	sq, ok := out.(simpleQuery)
+	if !ok {
+		return fmt.Errorf("failed to type-assert to simpleQuery")
+	}
 
 	if sq.Name != "john" {
-		return errors.New("you should have entered right name!")
+		return errors.New("you should have entered right name")
 	}
 
 	return nil
@@ -1567,8 +1609,10 @@ func Test_Bind_RepeatParserWithSameStruct(t *testing.T) {
 
 	var gzipJSON bytes.Buffer
 	w := gzip.NewWriter(&gzipJSON)
-	_, _ = w.Write([]byte(`{"body_param":"body_param"}`))
-	_ = w.Close()
+	_, err := w.Write([]byte(`{"body_param":"body_param"}`))
+	require.NoError(t, err)
+	err = w.Close()
+	require.NoError(t, err)
 	c.Request().Header.SetContentType(MIMEApplicationJSON)
 	c.Request().Header.Set(HeaderContentEncoding, "gzip")
 	c.Request().SetBody(gzipJSON.Bytes())

binder/mapping.go

@@ -86,7 +86,7 @@ func parse(aliasTag string, out any, data map[string][]string) error {
 // Parse data into the struct with gorilla/schema
 func parseToStruct(aliasTag string, out any, data map[string][]string) error {
 	// Get decoder from pool
-	schemaDecoder := decoderPoolMap[aliasTag].Get().(*schema.Decoder)
+	schemaDecoder := decoderPoolMap[aliasTag].Get().(*schema.Decoder) //nolint:errcheck,forcetypeassert // not needed
 	defer decoderPoolMap[aliasTag].Put(schemaDecoder)
 
 	// Set alias tag
@@ -136,7 +136,7 @@ func parseParamSquareBrackets(k string) (string, error) {
 	for i, b := range kbytes {
 		if b == '[' && kbytes[i+1] != ']' {
 			if err := bb.WriteByte('.'); err != nil {
-				return "", err //nolint:wrapchec
+				return "", err //nolint:wrapchec,wrapcheck // unnecessary to wrap it
 			}
 		}
 
@@ -145,7 +145,7 @@ func parseParamSquareBrackets(k string) (string, error) {
 		}
 
 		if err := bb.WriteByte(b); err != nil {
-			return "", err //nolint:wrapchec
+			return "", err //nolint:wrapchec,wrapcheck // unnecessary to wrap it
 		}
 	}
 

binder/xml.go

@@ -2,6 +2,7 @@ package binder
 
 import (
 	"encoding/xml"
+	"fmt"
 )
 
 type xmlBinding struct{}
@@ -11,5 +12,9 @@ func (*xmlBinding) Name() string {
 }
 
 func (*xmlBinding) Bind(body []byte, out any) error {
-	return xml.Unmarshal(body, out)
+	if err := xml.Unmarshal(body, out); err != nil {
+		return fmt.Errorf("failed to unmarshal xml: %w", err)
+	}
+
+	return nil
 }

client_test.go

@@ -5,6 +5,7 @@ import (
 	"bytes"
 	"crypto/tls"
 	"encoding/base64"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io"
@@ -17,8 +18,6 @@ import (
 	"testing"
 	"time"
 
-	"encoding/json"
-
 	"github.com/gofiber/fiber/v3/internal/tlstest"
 	"github.com/stretchr/testify/require"
 	"github.com/valyala/fasthttp/fasthttputil"

ctx.go

@@ -1109,7 +1109,11 @@ func (c *DefaultCtx) Render(name string, bind Map, layouts ...string) error {
 func (c *DefaultCtx) renderExtensions(bind Map) {
 	// Bind view map
 	c.viewBindMap.Range(func(key, value any) bool {
-		bind[key.(string)] = value
+		keyS, ok := key.(string)
+		if !ok {
+			panic(fmt.Errorf("failed to type-assert to string"))
+		}
+		bind[keyS] = value
 
 		return true
 	})

ctx_interface.go

@@ -7,6 +7,7 @@ package fiber
 import (
 	"context"
 	"crypto/tls"
+	"fmt"
 	"io"
 	"mime/multipart"
 	"sync"
@@ -408,7 +409,11 @@ func (app *App) NewCtx(fctx *fasthttp.RequestCtx) Ctx {
 
 // AcquireCtx retrieves a new Ctx from the pool.
 func (app *App) AcquireCtx() Ctx {
-	return app.pool.Get().(Ctx)
+	ctx, ok := app.pool.Get().(Ctx)
+	if !ok {
+		panic(fmt.Errorf("failed to type-assert to Ctx"))
+	}
+	return ctx
 }
 
 // ReleaseCtx releases the ctx back into the pool.

ctx_test.go

@@ -62,7 +62,7 @@ func Test_Ctx_Accepts(t *testing.T) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_Accepts -benchmem -count=4
 func Benchmark_Ctx_Accepts(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	c.Request().Header.Set("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9")
 	var res string
@@ -78,7 +78,7 @@ type customCtx struct {
 	DefaultCtx
 }
 
-func (c *customCtx) Params(key string, defaultValue ...string) string { //nolint:revive
+func (c *customCtx) Params(key string, defaultValue ...string) string { //revive:disable-line:unused-parameter // We need defaultValue for some cases
 	return "prefix_" + c.DefaultCtx.Params(key)
 }
 
@@ -140,7 +140,7 @@ func Test_Ctx_AcceptsCharsets(t *testing.T) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_AcceptsCharsets -benchmem -count=4
 func Benchmark_Ctx_AcceptsCharsets(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	c.Request().Header.Set("Accept-Charset", "utf-8, iso-8859-1;q=0.5")
 	var res string
@@ -166,7 +166,7 @@ func Test_Ctx_AcceptsEncodings(t *testing.T) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_AcceptsEncodings -benchmem -count=4
 func Benchmark_Ctx_AcceptsEncodings(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	c.Request().Header.Set(HeaderAcceptEncoding, "deflate, gzip;q=1.0, *;q=0.5")
 	var res string
@@ -191,7 +191,7 @@ func Test_Ctx_AcceptsLanguages(t *testing.T) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_AcceptsLanguages -benchmem -count=4
 func Benchmark_Ctx_AcceptsLanguages(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	c.Request().Header.Set(HeaderAcceptLanguage, "fr-CH, fr;q=0.9, en;q=0.8, de;q=0.7, *;q=0.5")
 	var res string
@@ -252,7 +252,7 @@ func Test_Ctx_Append(t *testing.T) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_Append -benchmem -count=4
 func Benchmark_Ctx_Append(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	b.ReportAllocs()
 	b.ResetTimer()
@@ -285,7 +285,7 @@ func Test_Ctx_Attachment(t *testing.T) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_Attachment -benchmem -count=4
 func Benchmark_Ctx_Attachment(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	b.ReportAllocs()
 	b.ResetTimer()
@@ -311,7 +311,7 @@ func Test_Ctx_BaseURL(t *testing.T) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_BaseURL -benchmem
 func Benchmark_Ctx_BaseURL(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	c.Request().SetHost("google.com:1337")
 	c.Request().URI().SetPath("/haha/oke/lol")
@@ -500,7 +500,7 @@ func Test_Ctx_Cookie(t *testing.T) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_Cookie -benchmem -count=4
 func Benchmark_Ctx_Cookie(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx)
+	c := app.NewCtx(&fasthttp.RequestCtx{}).(*DefaultCtx) //nolint:errcheck, forcetypeassert // not needed
 
 	b.ReportAllocs()
 	b.ResetTimer()
@@ -591,7 +591,7 @@ func Benchmark_Ctx_Format(b *testing.B) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_Format_HTML -benchmem -count=4
 func Benchmark_Ctx_Format_HTML(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{})
+	c := app.NewCtx(&fasthttp.RequestCtx{}) //nolint:errcheck, forcetypeassert // not needed
 
 	c.Request().Header.Set("Accept", "text/html")
 	b.ReportAllocs()
@@ -608,7 +608,7 @@ func Benchmark_Ctx_Format_HTML(b *testing.B) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_Format_JSON -benchmem -count=4
 func Benchmark_Ctx_Format_JSON(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{})
+	c := app.NewCtx(&fasthttp.RequestCtx{}) //nolint:errcheck, forcetypeassert // not needed
 
 	c.Request().Header.Set("Accept", "application/json")
 	b.ReportAllocs()
@@ -625,7 +625,7 @@ func Benchmark_Ctx_Format_JSON(b *testing.B) {
 // go test -v -run=^$ -bench=Benchmark_Ctx_Format_XML -benchmem -count=4
 func Benchmark_Ctx_Format_XML(b *testing.B) {
 	app := New()
-	c := app.NewCtx(&fasthttp.RequestCtx{})
+	c := app.NewCtx(&fasthttp.RequestCtx{}) //nolint:errcheck, forcetypeassert // not needed
 
 	c.Request().Header.Set("Accept", "application/xml")
 	b.ReportAllocs()

internal/memory/memory_test.go

@@ -12,7 +12,7 @@ import (
 
 func Test_Memory(t *testing.T) {
 	t.Parallel()
-	var store = New()
+	store := New()
 	var (
 		key     = "john"
 		val any = []byte("doe")
@@ -76,7 +76,6 @@ func Benchmark_Memory(b *testing.B) {
 			}
 			for _, key := range keys {
 				d.Delete(key)
-
 			}
 		}
 	})

internal/storage/memory/memory_test.go

@@ -65,9 +65,7 @@ func Test_Storage_Memory_Set_Expiration(t *testing.T) {
 }
 
 func Test_Storage_Memory_Get_Expired(t *testing.T) {
-	var (
-		key = "john"
-	)
+	key := "john"
 
 	result, err := testStore.Get(key)
 	require.NoError(t, err)
@@ -102,9 +100,7 @@ func Test_Storage_Memory_Delete(t *testing.T) {
 
 func Test_Storage_Memory_Reset(t *testing.T) {
 	t.Parallel()
-	var (
-		val = []byte("doe")
-	)
+	val := []byte("doe")
 
 	err := testStore.Set("john1", val, 0)
 	require.NoError(t, err)

listen.go

@@ -63,7 +63,7 @@ type ListenConfig struct {
 	// GracefulContext is a field to shutdown Fiber by given context gracefully.
 	//
 	// Default: nil
-	GracefulContext context.Context `json:"graceful_context"`
+	GracefulContext context.Context `json:"graceful_context"` //nolint:containedctx // It's needed to set context inside Listen.
 
 	// TLSConfigFunc allows customizing tls.Config as you want.
 	//
@@ -112,7 +112,7 @@ func listenConfigDefault(config ...ListenConfig) ListenConfig {
 		return ListenConfig{
 			ListenerNetwork: NetworkTCP4,
 			OnShutdownError: func(err error) {
-				log.Fatalf("shutdown: %v", err)
+				log.Fatalf("shutdown: %v", err) //nolint:revive // It's an optipn
 			},
 		}
 	}
@@ -124,7 +124,7 @@ func listenConfigDefault(config ...ListenConfig) ListenConfig {
 
 	if cfg.OnShutdownError == nil {
 		cfg.OnShutdownError = func(err error) {
-			log.Fatalf("shutdown: %v", err)
+			log.Fatalf("shutdown: %v", err) //nolint:revive // It's an optipn
 		}
 	}
 
@@ -141,7 +141,7 @@ func (app *App) Listen(addr string, config ...ListenConfig) error {
 	cfg := listenConfigDefault(config...)
 
 	// Configure TLS
-	var tlsConfig *tls.Config = nil
+	var tlsConfig *tls.Config
 	if cfg.CertFile != "" && cfg.CertKeyFile != "" {
 		cert, err := tls.LoadX509KeyPair(cfg.CertFile, cfg.CertKeyFile)
 		if err != nil {
@@ -160,7 +160,7 @@ func (app *App) Listen(addr string, config ...ListenConfig) error {
 		if cfg.CertClientFile != "" {
 			clientCACert, err := os.ReadFile(filepath.Clean(cfg.CertClientFile))
 			if err != nil {
-				return err
+				return fmt.Errorf("failed to read file: %w", err)
 			}
 
 			clientCertPool := x509.NewCertPool()
@@ -248,7 +248,7 @@ func (app *App) Listener(ln net.Listener, config ...ListenConfig) error {
 }
 
 // Create listener function.
-func (app *App) createListener(addr string, tlsConfig *tls.Config, cfg ListenConfig) (net.Listener, error) {
+func (*App) createListener(addr string, tlsConfig *tls.Config, cfg ListenConfig) (net.Listener, error) {
 	var listener net.Listener
 	var err error
 
@@ -262,6 +262,11 @@ func (app *App) createListener(addr string, tlsConfig *tls.Config, cfg ListenCon
 		cfg.ListenerAddrFunc(listener.Addr())
 	}
 
+	// Wrap error comes from tls.Listen/net.Listen
+	if err != nil {
+		err = fmt.Errorf("failed to listen: %w", err)
+	}
+
 	return listener, err
 }
 
@@ -278,7 +283,7 @@ func (app *App) printMessages(cfg ListenConfig, ln net.Listener) {
 }
 
 // startupMessage prepares the startup message with the handler number, port, address and other information
-func (app *App) startupMessage(addr string, tls bool, pids string, cfg ListenConfig) {
+func (app *App) startupMessage(addr string, enableTLS bool, pids string, cfg ListenConfig) { //nolint:revive TODO: Check CertKeyFile instead of control-flag.
 	// ignore child processes
 	if IsChild() {
 		return
@@ -297,7 +302,7 @@ func (app *App) startupMessage(addr string, tls bool, pids string, cfg ListenCon
 	}
 
 	scheme := schemeHTTP
-	if tls {
+	if enableTLS {
 		scheme = schemeHTTPS
 	}
 
@@ -424,7 +429,7 @@ func (app *App) printRoutesMessage() {
 func (app *App) gracefulShutdown(ctx context.Context, cfg ListenConfig) {
 	<-ctx.Done()
 
-	if err := app.Shutdown(); err != nil {
+	if err := app.Shutdown(); err != nil { //nolint:contextcheck // TODO: Implement it
 		cfg.OnShutdownError(err)
 	}
 

listen_test.go

@@ -1,3 +1,4 @@
+//nolint:wrapcheck // We must not wrap errors in tests
 package fiber
 
 import (

middleware/adaptor/adopter.go

@@ -45,7 +45,7 @@ func HTTPMiddleware(mw func(http.Handler) http.Handler) fiber.Handler {
 				}
 			}
 		})
-		_ = HTTPHandler(mw(nextHandler))(c)
+		_ = HTTPHandler(mw(nextHandler))(c) //nolint:errcheck // TODO
 		if next {
 			return c.Next()
 		}
@@ -81,7 +81,7 @@ func handlerFunc(app *fiber.App, h ...fiber.Handler) http.HandlerFunc {
 				return
 			}
 			req.Header.SetContentLength(len(body))
-			_, _ = req.BodyWriter().Write(body)
+			_, _ = req.BodyWriter().Write(body) //nolint:errcheck // TODO
 		}
 		req.Header.SetMethod(r.Method)
 		req.SetRequestURI(r.RequestURI)
@@ -121,6 +121,6 @@ func handlerFunc(app *fiber.App, h ...fiber.Handler) http.HandlerFunc {
 			w.Header().Add(string(k), string(v))
 		})
 		w.WriteHeader(fctx.Response.StatusCode())
-		_, _ = w.Write(fctx.Response.Body())
+		_, _ = w.Write(fctx.Response.Body()) //nolint:errcheck // not needed
 	}
 }

middleware/adaptor/adopter_test.go

@@ -5,6 +5,7 @@
 package adaptor
 
 import (
+	"context"
 	"fmt"
 	"io"
 	"net"
@@ -71,10 +72,13 @@ func Test_HTTPHandler(t *testing.T) {
 			t.Fatalf("unexpected remoteAddr %q. Expecting %q", r.RemoteAddr, expectedRemoteAddr)
 		}
 		body, err := io.ReadAll(r.Body)
-		r.Body.Close()
 		if err != nil {
 			t.Fatalf("unexpected error when reading request body: %s", err)
 		}
+		err = r.Body.Close()
+		if err != nil {
+			t.Fatalf("unexpected error when closing request body: %s", err)
+		}
 		if string(body) != expectedBody {
 			t.Fatalf("unexpected body %q. Expecting %q", body, expectedBody)
 		}
@@ -107,7 +111,10 @@ func Test_HTTPHandler(t *testing.T) {
 	req.Header.SetMethod(expectedMethod)
 	req.SetRequestURI(expectedRequestURI)
 	req.Header.SetHost(expectedHost)
-	req.BodyWriter().Write([]byte(expectedBody)) // nolint:errcheck
+	_, err = req.BodyWriter().Write([]byte(expectedBody))
+	if err != nil {
+		t.Fatalf("unexpected error when writing the request body: %s", err)
+	}
 	for k, v := range expectedHeader {
 		req.Header.Set(k, v)
 	}
@@ -186,7 +193,10 @@ func Test_HTTPMiddleware(t *testing.T) {
 	})
 
 	for _, tt := range tests {
-		req, _ := http.NewRequest(tt.method, tt.url, nil)
+		req, err := http.NewRequestWithContext(context.Background(), tt.method, tt.url, nil)
+		if err != nil {
+			t.Fatalf(`%s: %s`, t.Name(), err)
+		}
 		resp, err := app.Test(req)
 		if err != nil {
 			t.Fatalf(`%s: %s`, t.Name(), err)
@@ -194,6 +204,10 @@ func Test_HTTPMiddleware(t *testing.T) {
 		if resp.StatusCode != tt.statusCode {
 			t.Fatalf(`%s: StatusCode: got %v - expected %v`, t.Name(), resp.StatusCode, tt.statusCode)
 		}
+		err = resp.Body.Close()
+		if err != nil {
+			t.Fatalf("unexpected error when closing request body: %s", err)
+		}
 	}
 }
 
@@ -214,6 +228,8 @@ func Test_FiberAppDefaultPort(t *testing.T) {
 }
 
 func testFiberToHandlerFunc(t *testing.T, checkDefaultPort bool, app ...*fiber.App) { //revive:disable-line:flag-parameter
+	t.Helper()
+
 	expectedMethod := fiber.MethodPost
 	expectedRequestURI := "/foo/bar?baz=123"
 	expectedBody := "body 123 foo bar baz"

middleware/basicauth/basicauth_test.go

@@ -39,8 +39,8 @@ func Test_Middleware_BasicAuth(t *testing.T) {
 	}))
 
 	app.Get("/testauth", func(c fiber.Ctx) error {
-		username := c.Locals("username").(string)
-		password := c.Locals("password").(string)
+		username := c.Locals("username").(string) //nolint:errcheck, forcetypeassert // not needed
+		password := c.Locals("password").(string) //nolint:errcheck, forcetypeassert // not needed
 
 		return c.SendString(username + password)
 	})

middleware/earlydata/earlydata_test.go

@@ -38,8 +38,7 @@ func appWithConfig(t *testing.T, c *fiber.Config) *fiber.App {
 		isEarly := earlydata.IsEarly(c)
 
 		switch h := c.Get(headerName); h {
-		case "",
-			headerValOff:
+		case "", headerValOff:
 			if isEarly {
 				return errors.New("is early-data even though it's not")
 			}
@@ -69,7 +68,11 @@ func appWithConfig(t *testing.T, c *fiber.Config) *fiber.App {
 		fiber.MethodGet,
 		fiber.MethodPost,
 	}, "/", func(c fiber.Ctx) error {
-		if !c.Locals(localsKeyTestValid).(bool) {
+		valid, ok := c.Locals(localsKeyTestValid).(bool)
+		if !ok {
+			panic(fmt.Errorf("failed to type-assert to bool"))
+		}
+		if !valid {
 			return errors.New("handler called even though validation failed")
 		}
 

middleware/encryptcookie/config.go

@@ -1,6 +1,8 @@
 package encryptcookie
 
-import "github.com/gofiber/fiber/v3"
+import (
+	"github.com/gofiber/fiber/v3"
+)
 
 // Config defines the config for middleware.
 type Config struct {

middleware/expvar/config.go

@@ -1,6 +1,8 @@
 package expvar
 
-import "github.com/gofiber/fiber/v3"
+import (
+	"github.com/gofiber/fiber/v3"
+)
 
 // Config defines the config for middleware.
 type Config struct {

middleware/favicon/favicon_test.go

@@ -1,4 +1,3 @@
-//nolint:bodyclose // Much easier to just ignore memory leaks in tests
 package favicon
 
 import (

middleware/filesystem/utils.go

@@ -21,7 +21,10 @@ func getFileExtension(p string) string {
 }
 
 func dirList(c fiber.Ctx, f fs.File) error {
-	ff := f.(fs.ReadDirFile)
+	ff, ok := f.(fs.ReadDirFile)
+	if !ok {
+		return fmt.Errorf("failed to type-assert to fs.ReadDirFile")
+	}
 	fileinfos, err := ff.ReadDir(-1)
 	if err != nil {
 		return fmt.Errorf("failed to read dir: %w", err)
@@ -33,7 +36,7 @@ func dirList(c fiber.Ctx, f fs.File) error {
 		name := fi.Name()
 		info, err := fi.Info()
 		if err != nil {
-			return err
+			return fmt.Errorf("failed to get file info: %w", err)
 		}
 
 		fm[name] = info
@@ -73,5 +76,10 @@ func dirList(c fiber.Ctx, f fs.File) error {
 func openFile(filesystem fs.FS, name string) (fs.File, error) {
 	name = filepath.ToSlash(name)
 
-	return filesystem.Open(name)
+	file, err := filesystem.Open(name)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open file: %w", err)
+	}
+
+	return file, nil
 }

middleware/idempotency/config.go

@@ -9,9 +9,7 @@ import (
 	"github.com/gofiber/fiber/v3/internal/storage/memory"
 )
 
-var (
-	ErrInvalidIdempotencyKey = errors.New("invalid idempotency key")
-)
+var ErrInvalidIdempotencyKey = errors.New("invalid idempotency key")
 
 // Config defines the config for middleware.
 type Config struct {

middleware/keyauth/keyauth.go

@@ -11,10 +11,8 @@ import (
 	"github.com/gofiber/fiber/v3"
 )
 
-var (
-	// When there is no request of the key thrown ErrMissingOrMalformedAPIKey
-	ErrMissingOrMalformedAPIKey = errors.New("missing or malformed API Key")
-)
+// When there is no request of the key thrown ErrMissingOrMalformedAPIKey
+var ErrMissingOrMalformedAPIKey = errors.New("missing or malformed API Key")
 
 type Config struct {
 	// Filter defines a function to skip middleware.

middleware/logger/logger.go

@@ -123,10 +123,6 @@ func New(config ...Config) fiber.Handler {
 		}
 
 		// Logger instance & update some logger data fields
-		if err = cfg.LoggerFunc(c, data, cfg); err != nil {
-			return err
-		}
-
-		return nil
+		return cfg.LoggerFunc(c, data, cfg)
 	}
 }

middleware/pprof/config.go

@@ -1,6 +1,8 @@
 package pprof
 
-import "github.com/gofiber/fiber/v3"
+import (
+	"github.com/gofiber/fiber/v3"
+)
 
 // Config defines the config for middleware.
 type Config struct {

middleware/redirect/redirect_test.go

@@ -1,8 +1,8 @@
-//nolint:bodyclose // Much easier to just ignore memory leaks in tests
 // 🚀 Fiber is an Express inspired web framework written in Go with 💖
 // 📌 API Documentation: https://fiber.wiki
 // 📝 Github Repository: https://github.com/gofiber/fiber
 
+//nolint:bodyclose // Much easier to just ignore memory leaks in tests
 package redirect
 
 import (

middleware/rewrite/rewrite.go

@@ -50,7 +50,7 @@ func New(config ...Config) fiber.Handler {
 	cfg.rulesRegex = map[*regexp.Regexp]string{}
 	// Initialize
 	for k, v := range cfg.Rules {
-		k = strings.Replace(k, "*", "(.*)", -1)
+		k = strings.ReplaceAll(k, "*", "(.*)")
 		k += "$"
 		cfg.rulesRegex[regexp.MustCompile(k)] = v
 	}

middleware/skip/skip.go

@@ -1,6 +1,8 @@
 package skip
 
-import "github.com/gofiber/fiber/v3"
+import (
+	"github.com/gofiber/fiber/v3"
+)
 
 // New creates a middleware handler which skips the wrapped handler
 // if the exclude predicate returns true.

redirect.go

@@ -5,6 +5,7 @@
 package fiber
 
 import (
+	"fmt"
 	"strings"
 	"sync"
 
@@ -13,17 +14,15 @@ import (
 	"github.com/valyala/bytebufferpool"
 )
 
-var (
-	// Pool for redirection
-	redirectPool = sync.Pool{
-		New: func() any {
-			return &Redirect{
-				status:   StatusFound,
-				oldInput: make(map[string]string, 0),
-			}
-		},
-	}
-)
+// Pool for redirection
+var redirectPool = sync.Pool{
+	New: func() any {
+		return &Redirect{
+			status:   StatusFound,
+			oldInput: make(map[string]string, 0),
+		}
+	},
+}
 
 // Cookie name to send flash messages when to use redirection.
 const (
@@ -52,7 +51,12 @@ type RedirectConfig struct {
 
 // AcquireRedirect return default Redirect reference from the redirect pool
 func AcquireRedirect() *Redirect {
-	return redirectPool.Get().(*Redirect)
+	redirect, ok := redirectPool.Get().(*Redirect)
+	if !ok {
+		panic(fmt.Errorf("failed to type-assert to *Redirect"))
+	}
+
+	return redirect
 }
 
 // ReleaseRedirect returns c acquired via Redirect to redirect pool.
@@ -103,11 +107,11 @@ func (r *Redirect) WithInput() *Redirect {
 
 	switch ctype {
 	case MIMEApplicationForm:
-		_ = r.c.Bind().Form(r.oldInput)
+		_ = r.c.Bind().Form(r.oldInput) //nolint:errcheck // not needed
 	case MIMEMultipartForm:
-		_ = r.c.Bind().MultipartForm(r.oldInput)
+		_ = r.c.Bind().MultipartForm(r.oldInput) //nolint:errcheck // not needed
 	default:
-		_ = r.c.Bind().Query(r.oldInput)
+		_ = r.c.Bind().Query(r.oldInput) //nolint:errcheck // not needed
 	}
 
 	return r
@@ -286,7 +290,7 @@ func (r *Redirect) setFlash() {
 	r.c.ClearCookie(FlashCookieName)
 }
 
-func parseMessage(raw string) (string, string) {
+func parseMessage(raw string) (key string, value string) {
 	if i := findNextNonEscapedCharsetPosition(raw, []byte(CookieDataAssigner)); i != -1 {
 		return RemoveEscapeChar(raw[:i]), RemoveEscapeChar(raw[i+1:])
 	}

redirect_test.go

@@ -2,6 +2,7 @@
 // 📝 Github Repository: https://github.com/gofiber/fiber
 // 📌 API Documentation: https://docs.gofiber.io
 
+//nolint:wrapcheck // We must not wrap errors in tests
 package fiber
 
 import (
@@ -341,7 +342,7 @@ func Benchmark_Redirect_Route(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		c.Redirect().Route("user", RedirectConfig{
+		c.Redirect().Route("user", RedirectConfig{ //nolint:errcheck,gosec,revive // we don't need to handle error here
 			Params: Map{
 				"name": "fiber",
 			},
@@ -365,7 +366,7 @@ func Benchmark_Redirect_Route_WithQueries(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		c.Redirect().Route("user", RedirectConfig{
+		c.Redirect().Route("user", RedirectConfig{ //nolint:errcheck,gosec,revive // we don't need to handle error here
 			Params: Map{
 				"name": "fiber",
 			},
@@ -394,7 +395,7 @@ func Benchmark_Redirect_Route_WithFlashMessages(b *testing.B) {
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		c.Redirect().With("success", "1").With("message", "test").Route("user")
+		c.Redirect().With("success", "1").With("message", "test").Route("user") //nolint:errcheck,gosec,revive // we don't need to handle error here
 	}
 
 	require.Equal(b, 302, c.Response().StatusCode())

router.go

@@ -190,7 +190,7 @@ func (app *App) next(c *DefaultCtx) (bool, error) {
 	return false, err
 }
 
-func (app *App) handler(rctx *fasthttp.RequestCtx) {
+func (app *App) requestHandler(rctx *fasthttp.RequestCtx) {
 	// Handler for default ctxs
 	var c CustomCtx
 	if app.newCtxFunc != nil {