feat(prefork): delegate to fasthttp/prefork to eliminate code duplication

constants.go

@@ -336,3 +336,8 @@ const (
 	ConstraintDatetime        = "datetime"
 	ConstraintRegex           = "regex"
 )
+
+// OS identifiers
+const (
+	windowsOS = "windows"
+)

go.mod

@@ -29,3 +29,5 @@ require (
 	golang.org/x/text v0.36.0
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
+
+replace github.com/valyala/fasthttp => github.com/ReneWerner87/fasthttp v0.0.0-20260411181936-c1055ce62c37

go.sum

@@ -1,3 +1,7 @@
+github.com/ReneWerner87/fasthttp v0.0.0-20260411175140-2802b1a6a28c h1:okyL6heaed/PXioloFjKV47IdU4/h5dShgXP0s9O1wU=
+github.com/ReneWerner87/fasthttp v0.0.0-20260411175140-2802b1a6a28c/go.mod h1:oDZEHHkJ/Buyklg6uURmYs19442zFSnCIfX3j1FY3pE=
+github.com/ReneWerner87/fasthttp v0.0.0-20260411181936-c1055ce62c37 h1:lXZmbEiHI7OrcA0zfgTjqw0OPFmdQCjxAjbEtVKaQ70=
+github.com/ReneWerner87/fasthttp v0.0.0-20260411181936-c1055ce62c37/go.mod h1:oDZEHHkJ/Buyklg6uURmYs19442zFSnCIfX3j1FY3pE=
 github.com/andybalholm/brotli v1.2.1 h1:R+f5xP285VArJDRgowrfb9DqL18yVK0gKAW/F+eTWro=
 github.com/andybalholm/brotli v1.2.1/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -28,8 +32,6 @@ github.com/tinylib/msgp v1.6.3 h1:bCSxiTz386UTgyT1i0MSCvdbWjVW+8sG3PjkGsZQt4s=
 github.com/tinylib/msgp v1.6.3/go.mod h1:RSp0LW9oSxFut3KzESt5Voq4GVWyS+PSulT77roAqEA=
 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 v1.70.0 h1:LAhMGcWk13QZWm85+eg8ZBNbrq5mnkWFGbHMUJHIdXA=
-github.com/valyala/fasthttp v1.70.0/go.mod h1:oDZEHHkJ/Buyklg6uURmYs19442zFSnCIfX3j1FY3pE=
 github.com/x448/float16 v0.8.4 h1:qLwI1I70+NjRFUR3zs1JPUCgaCXSh3SW62uAKT1mSBM=
 github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcYsOfg=
 github.com/xyproto/randomstring v1.0.5 h1:YtlWPoRdgMu3NZtP45drfy1GKoojuR7hmRcnhZqKjWU=

hooks_test.go

@@ -11,6 +11,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"github.com/valyala/bytebufferpool"
+	"github.com/valyala/fasthttp/prefork"
 
 	"github.com/gofiber/fiber/v3/log"
 )
@@ -519,7 +520,8 @@ func Test_ListenData_Hook_HelperFunctions(t *testing.T) {
 }
 
 func Test_Hook_OnListenPrefork(t *testing.T) {
-	t.Parallel()
+	testPreforkMaster = true
+
 	app := New()
 
 	buf := bytebufferpool.Get()
@@ -532,12 +534,12 @@ func Test_Hook_OnListenPrefork(t *testing.T) {
 		return nil
 	})
 
-	go func() {
-		time.Sleep(1000 * time.Millisecond)
-		assert.NoError(t, app.Shutdown())
-	}()
-
-	require.NoError(t, app.Listen(":0", ListenConfig{DisableStartupMessage: true, EnablePrefork: true}))
+	err := app.Listen(":0", ListenConfig{
+		DisableStartupMessage:   true,
+		EnablePrefork:           true,
+		PreforkRecoverThreshold: 1,
+	})
+	require.ErrorIs(t, err, prefork.ErrOverRecovery)
 	require.Equal(t, "ready", buf.String())
 }
 
@@ -548,17 +550,17 @@ func Test_Hook_OnHook(t *testing.T) {
 	testPreforkMaster = true
 	testOnPrefork = true
 
-	go func() {
-		time.Sleep(1000 * time.Millisecond)
-		assert.NoError(t, app.Shutdown())
-	}()
-
 	app.Hooks().OnFork(func(pid int) error {
 		require.Equal(t, 1, pid)
 		return nil
 	})
 
-	require.NoError(t, app.prefork(":0", nil, &ListenConfig{DisableStartupMessage: true, EnablePrefork: true}))
+	err := app.prefork(":0", nil, &ListenConfig{
+		DisableStartupMessage:   true,
+		EnablePrefork:           true,
+		PreforkRecoverThreshold: 1,
+	})
+	require.ErrorIs(t, err, prefork.ErrOverRecovery)
 }
 
 func Test_Hook_OnMount(t *testing.T) {

listen.go

@@ -41,7 +41,7 @@
 )
 
 // ListenConfig is a struct to customize startup of Fiber.
 type ListenConfig struct {
 	// GracefulContext is a field to shutdown Fiber by given context gracefully.
 	//
 	// Default: nil
@@ -126,6 +126,19 @@
 	// Default: false
 	EnablePrefork bool `json:"enable_prefork"`
 
+	// PreforkRecoverThreshold defines the maximum number of times a child process
+	// can be restarted after crashing before the master process exits with an error.
+	// This only applies when EnablePrefork is true.
+	//
+	// Default: runtime.GOMAXPROCS(0) / 2
+	PreforkRecoverThreshold int `json:"prefork_recover_threshold"`
+
+	// PreforkLogger sets a custom logger for the prefork process manager.
+	// This only applies when EnablePrefork is true.
+	//
+	// Default: Fiber's built-in logger (log.Infof)
+	PreforkLogger PreforkLoggerInterface `json:"prefork_logger"`
+
 	// If set to true, will print all routes with their method, path and handler.
 	//
 	// Default: false

listen_test.go

@@ -20,6 +20,7 @@ import (
 	"github.com/stretchr/testify/require"
 	"github.com/valyala/fasthttp"
 	"github.com/valyala/fasthttp/fasthttputil"
+	"github.com/valyala/fasthttp/prefork"
 	"golang.org/x/crypto/acme/autocert"
 )
 
@@ -169,7 +170,12 @@ func Test_Listen_Prefork(t *testing.T) {
 
 	app := New()
 
-	require.NoError(t, app.Listen(":0", ListenConfig{DisableStartupMessage: true, EnablePrefork: true}))
+	err := app.Listen(":0", ListenConfig{
+		DisableStartupMessage:   true,
+		EnablePrefork:           true,
+		PreforkRecoverThreshold: 1,
+	})
+	require.ErrorIs(t, err, prefork.ErrOverRecovery)
 }
 
 // go test -run Test_Listen_TLSMinVersion
@@ -202,11 +208,13 @@ func Test_Listen_TLSMinVersion(t *testing.T) {
 	require.NoError(t, app.Listen(":0", ListenConfig{TLSMinVersion: tls.VersionTLS13}))
 
 	// Valid TLSMinVersion with Prefork
-	go func() {
-		time.Sleep(1000 * time.Millisecond)
-		assert.NoError(t, app.Shutdown())
-	}()
-	require.NoError(t, app.Listen(":0", ListenConfig{DisableStartupMessage: true, EnablePrefork: true, TLSMinVersion: tls.VersionTLS13}))
+	err := app.Listen(":0", ListenConfig{
+		DisableStartupMessage:   true,
+		EnablePrefork:           true,
+		TLSMinVersion:           tls.VersionTLS13,
+		PreforkRecoverThreshold: 1,
+	})
+	require.ErrorIs(t, err, prefork.ErrOverRecovery)
 }
 
 // go test -run Test_Listen_TLS
@@ -244,17 +252,14 @@ func Test_Listen_TLS_Prefork(t *testing.T) {
 		CertKeyFile:           "./.github/testdata/template.tmpl",
 	}))
 
-	go func() {
-		time.Sleep(1000 * time.Millisecond)
-		assert.NoError(t, app.Shutdown())
-	}()
-
-	require.NoError(t, app.Listen(":0", ListenConfig{
-		DisableStartupMessage: true,
-		EnablePrefork:         true,
-		CertFile:              "./.github/testdata/ssl.pem",
-		CertKeyFile:           "./.github/testdata/ssl.key",
-	}))
+	tlsErr := app.Listen(":0", ListenConfig{
+		DisableStartupMessage:   true,
+		EnablePrefork:           true,
+		CertFile:                "./.github/testdata/ssl.pem",
+		CertKeyFile:             "./.github/testdata/ssl.key",
+		PreforkRecoverThreshold: 1,
+	})
+	require.ErrorIs(t, tlsErr, prefork.ErrOverRecovery)
 }
 
 // go test -run Test_Listen_MutualTLS
@@ -295,18 +300,15 @@ func Test_Listen_MutualTLS_Prefork(t *testing.T) {
 		CertClientFile:        "./.github/testdata/ca-chain.cert.pem",
 	}))
 
-	go func() {
-		time.Sleep(1000 * time.Millisecond)
-		assert.NoError(t, app.Shutdown())
-	}()
-
-	require.NoError(t, app.Listen(":0", ListenConfig{
-		DisableStartupMessage: true,
-		EnablePrefork:         true,
-		CertFile:              "./.github/testdata/ssl.pem",
-		CertKeyFile:           "./.github/testdata/ssl.key",
-		CertClientFile:        "./.github/testdata/ca-chain.cert.pem",
-	}))
+	mtlsErr := app.Listen(":0", ListenConfig{
+		DisableStartupMessage:   true,
+		EnablePrefork:           true,
+		CertFile:                "./.github/testdata/ssl.pem",
+		CertKeyFile:             "./.github/testdata/ssl.key",
+		CertClientFile:          "./.github/testdata/ca-chain.cert.pem",
+		PreforkRecoverThreshold: 1,
+	})
+	require.ErrorIs(t, mtlsErr, prefork.ErrOverRecovery)
 }
 
 // go test -run Test_Listener