Merge a5d4feb09864951fabd1fb5bb386a6142f93be20 into d1a15347b1e45a8ee816193d3578a93bfd73b70f

Co-authored-by: Bo-Yi Wu <appleboy.tw@gmail.com>

benchmarks_test.go

@@ -154,7 +154,7 @@ func runRequest(B *testing.B, r *Engine, method, path string) {
 	w := newMockWriter()
 	B.ReportAllocs()
 	B.ResetTimer()
-	for i := 0; i < B.N; i++ {
+	for B.Loop() {
 		r.ServeHTTP(w, req)
 	}
 }

binding/default_validator.go

@@ -27,7 +27,7 @@ func (err SliceValidationError) Error() string {
 	}
 
 	var b strings.Builder
-	for i := 0; i < len(err); i++ {
+	for i := range len(err) {
 		if err[i] != nil {
 			if b.Len() > 0 {
 				b.WriteString("\n")
@@ -58,7 +58,7 @@ func (v *defaultValidator) ValidateStruct(obj any) error {
 	case reflect.Slice, reflect.Array:
 		count := value.Len()
 		validateRet := make(SliceValidationError, 0)
-		for i := 0; i < count; i++ {
+		for i := range count {
 			if err := v.ValidateStruct(value.Index(i).Interface()); err != nil {
 				validateRet = append(validateRet, err)
 			}

binding/form_mapping.go

@@ -118,7 +118,7 @@ func mapping(value reflect.Value, field reflect.StructField, setter setter, tag
 		tValue := value.Type()
 
 		var isSet bool
-		for i := 0; i < value.NumField(); i++ {
+		for i := range value.NumField() {
 			sf := tValue.Field(i)
 			if sf.PkgPath != "" && !sf.Anonymous { // unexported
 				continue

context.go

@@ -55,14 +55,6 @@ const ContextRequestKey ContextKeyType = 0
 // abortIndex represents a typical value used in abort functions.
 const abortIndex int8 = math.MaxInt8 >> 1
 
-// safeInt8 converts int to int8 safely, capping at math.MaxInt8
-func safeInt8(n int) int8 {
-	if n > math.MaxInt8 {
-		return math.MaxInt8
-	}
-	return int8(n)
-}
-
 // Context is the most important part of gin. It allows us to pass variables between middleware,
 // manage the flow, validate the JSON of a request and render a JSON response for example.
 type Context struct {

context_test.go

@@ -3620,22 +3620,22 @@ func BenchmarkGetMapFromFormData(b *testing.B) {
 
 	// Test case 3: Large dataset with many bracket keys
 	largeData := make(map[string][]string)
-	for i := 0; i < 100; i++ {
+	for i := range 100 {
 		key := fmt.Sprintf("ids[%d]", i)
 		largeData[key] = []string{fmt.Sprintf("value%d", i)}
 	}
-	for i := 0; i < 50; i++ {
+	for i := range 50 {
 		key := fmt.Sprintf("names[%d]", i)
 		largeData[key] = []string{fmt.Sprintf("name%d", i)}
 	}
-	for i := 0; i < 25; i++ {
+	for i := range 25 {
 		key := fmt.Sprintf("other[key%d]", i)
 		largeData[key] = []string{fmt.Sprintf("other%d", i)}
 	}
 
 	// Test case 4: Dataset with many non-matching keys (worst case)
 	worstCaseData := make(map[string][]string)
-	for i := 0; i < 100; i++ {
+	for i := range 100 {
 		key := fmt.Sprintf("nonmatching%d", i)
 		worstCaseData[key] = []string{fmt.Sprintf("value%d", i)}
 	}
@@ -3671,7 +3671,7 @@ func BenchmarkGetMapFromFormData(b *testing.B) {
 	for _, bm := range benchmarks {
 		b.Run(bm.name, func(b *testing.B) {
 			b.ReportAllocs()
-			for i := 0; i < b.N; i++ {
+			for b.Loop() {
 				_, _ = getMapFromFormData(bm.data, bm.key)
 			}
 		})

gin_integration_test.go

@@ -400,7 +400,7 @@ func TestConcurrentHandleContext(t *testing.T) {
 	var wg sync.WaitGroup
 	iterations := 200
 	wg.Add(iterations)
-	for i := 0; i < iterations; i++ {
+	for range iterations {
 		go func() {
 			req, err := http.NewRequest(http.MethodGet, "/", nil)
 			assert.NoError(t, err)

internal/bytesconv/bytesconv_test.go

@@ -30,7 +30,7 @@ func rawStrToBytes(s string) []byte {
 
 func TestBytesToString(t *testing.T) {
 	data := make([]byte, 1024)
-	for i := 0; i < 100; i++ {
+	for range 100 {
 		_, err := cRand.Read(data)
 		if err != nil {
 			t.Fatal(err)
@@ -79,7 +79,7 @@ func RandStringBytesMaskImprSrcSB(n int) string {
 }
 
 func TestStringToBytes(t *testing.T) {
-	for i := 0; i < 100; i++ {
+	for range 100 {
 		s := RandStringBytesMaskImprSrcSB(64)
 		if !bytes.Equal(rawStrToBytes(s), StringToBytes(s)) {
 			t.Fatal("don't match")

recovery.go

@@ -5,7 +5,9 @@
 package gin
 
 import (
+	"bufio"
 	"bytes"
+	"cmp"
 	"errors"
 	"fmt"
 	"io"
@@ -21,9 +23,10 @@ import (
 	"github.com/gin-gonic/gin/internal/bytesconv"
 )
 
-const dunno = "???"
-
-var dunnoBytes = []byte(dunno)
+const (
+	dunno     = "???"
+	stackSkip = 3
+)
 
 // RecoveryFunc defines the function passable to CustomRecovery.
 type RecoveryFunc func(c *Context, err any)
@@ -72,7 +75,6 @@ func CustomRecoveryWithWriter(out io.Writer, handle RecoveryFunc) HandlerFunc {
 					brokenPipe = true
 				}
 				if logger != nil {
-					const stackSkip = 3
 					if brokenPipe {
 						logger.Printf("%s\n%s%s", err, secureRequestDump(c.Request), reset)
 					} else if IsDebugging() {
@@ -120,8 +122,11 @@ func stack(skip int) []byte {
 	buf := new(bytes.Buffer) // the returned data
 	// As we loop, we open files and read them. These variables record the currently
 	// loaded file.
-	var lines [][]byte
-	var lastFile string
+	var (
+		nLine    string
+		lastFile string
+		err      error
+	)
 	for i := skip; ; i++ { // Skip the expected number of frames
 		pc, file, line, ok := runtime.Caller(i)
 		if !ok {
@@ -130,25 +135,44 @@ func stack(skip int) []byte {
 		// Print this much at least.  If we can't find the source, it won't show.
 		fmt.Fprintf(buf, "%s:%d (0x%x)\n", file, line, pc)
 		if file != lastFile {
-			data, err := os.ReadFile(file)
+			nLine, err = readNthLine(file, line-1)
 			if err != nil {
 				continue
 			}
-			lines = bytes.Split(data, []byte{'\n'})
 			lastFile = file
 		}
-		fmt.Fprintf(buf, "\t%s: %s\n", function(pc), source(lines, line))
+		fmt.Fprintf(buf, "\t%s: %s\n", function(pc), cmp.Or(nLine, dunno))
 	}
 	return buf.Bytes()
 }
 
-// source returns a space-trimmed slice of the n'th line.
-func source(lines [][]byte, n int) []byte {
-	n-- // in stack trace, lines are 1-indexed but our array is 0-indexed
-	if n < 0 || n >= len(lines) {
-		return dunnoBytes
+// readNthLine reads the nth line from the file.
+// It returns the trimmed content of the line if found,
+// or an empty string if the line doesn't exist.
+// If there's an error opening the file, it returns the error.
+func readNthLine(file string, n int) (string, error) {
+	if n < 0 {
+		return "", nil
 	}
-	return bytes.TrimSpace(lines[n])
+
+	f, err := os.Open(file)
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	for i := 0; i < n; i++ {
+		if !scanner.Scan() {
+			return "", nil
+		}
+	}
+
+	if scanner.Scan() {
+		return strings.TrimSpace(scanner.Text()), nil
+	}
+
+	return "", nil
 }
 
 // function returns, if possible, the name of the function containing the PC.

recovery_test.go

@@ -88,21 +88,6 @@ func TestPanicWithAbort(t *testing.T) {
 	assert.Equal(t, http.StatusBadRequest, w.Code)
 }
 
-func TestSource(t *testing.T) {
-	bs := source(nil, 0)
-	assert.Equal(t, dunnoBytes, bs)
-
-	in := [][]byte{
-		[]byte("Hello world."),
-		[]byte("Hi, gin.."),
-	}
-	bs = source(in, 10)
-	assert.Equal(t, dunnoBytes, bs)
-
-	bs = source(in, 1)
-	assert.Equal(t, []byte("Hello world."), bs)
-}
-
 func TestFunction(t *testing.T) {
 	bs := function(1)
 	assert.Equal(t, dunno, bs)
@@ -331,3 +316,53 @@ func TestSecureRequestDump(t *testing.T) {
 		})
 	}
 }
+
+// TestReadNthLine tests the readNthLine function with various scenarios.
+func TestReadNthLine(t *testing.T) {
+	// Create a temporary test file
+	testContent := "line 0 \n line 1  \nline 2 \nline 3  \nline 4"
+	tempFile, err := os.CreateTemp("", "testfile*.txt")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.Remove(tempFile.Name())
+
+	// Write test content to the temporary file
+	if _, err := tempFile.WriteString(testContent); err != nil {
+		t.Fatal(err)
+	}
+	if err := tempFile.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	// Test cases
+	tests := []struct {
+		name     string
+		lineNum  int
+		fileName string
+		want     string
+		wantErr  bool
+	}{
+		{name: "Read first line", lineNum: 0, fileName: tempFile.Name(), want: "line 0", wantErr: false},
+		{name: "Read middle line", lineNum: 2, fileName: tempFile.Name(), want: "line 2", wantErr: false},
+		{name: "Read last line", lineNum: 4, fileName: tempFile.Name(), want: "line 4", wantErr: false},
+		{name: "Line number exceeds file length", lineNum: 10, fileName: tempFile.Name(), want: "", wantErr: false},
+		{name: "Negative line number", lineNum: -1, fileName: tempFile.Name(), want: "", wantErr: false},
+		{name: "Non-existent file", lineNum: 1, fileName: "/non/existent/file.txt", want: "", wantErr: true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := readNthLine(tt.fileName, tt.lineNum)
+			assert.Equal(t, tt.wantErr, err != nil)
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}
+
+func BenchmarkStack(b *testing.B) {
+	b.ReportAllocs()
+	for b.Loop() {
+		_ = stack(stackSkip)
+	}
+}

tree.go

@@ -5,7 +5,6 @@
 package gin
 
 import (
-	"math"
 	"net/url"
 	"strings"
 	"unicode"
@@ -78,14 +77,6 @@ func (n *node) addChild(child *node) {
 	}
 }
 
-// safeUint16 converts int to uint16 safely, capping at math.MaxUint16
-func safeUint16(n int) uint16 {
-	if n > math.MaxUint16 {
-		return math.MaxUint16
-	}
-	return uint16(n)
-}
-
 func countParams(path string) uint16 {
 	colons := strings.Count(path, ":")
 	stars := strings.Count(path, "*")

utils.go

@@ -6,6 +6,7 @@ package gin
 
 import (
 	"encoding/xml"
+	"math"
 	"net/http"
 	"os"
 	"path"
@@ -155,10 +156,26 @@ func resolveAddress(addr []string) string {
 
 // https://stackoverflow.com/questions/53069040/checking-a-string-contains-only-ascii-characters
 func isASCII(s string) bool {
-	for i := 0; i < len(s); i++ {
+	for i := range len(s) {
 		if s[i] > unicode.MaxASCII {
 			return false
 		}
 	}
 	return true
 }
+
+// safeInt8 converts int to int8 safely, capping at math.MaxInt8
+func safeInt8(n int) int8 {
+	if n > math.MaxInt8 {
+		return math.MaxInt8
+	}
+	return int8(n)
+}
+
+// safeUint16 converts int to uint16 safely, capping at math.MaxUint16
+func safeUint16(n int) uint16 {
+	if n > math.MaxUint16 {
+		return math.MaxUint16
+	}
+	return uint16(n)
+}

utils_test.go

@@ -8,6 +8,7 @@ import (
 	"bytes"
 	"encoding/xml"
 	"fmt"
+	"math"
 	"net/http"
 	"testing"
 
@@ -148,3 +149,13 @@ func TestIsASCII(t *testing.T) {
 	assert.True(t, isASCII("test"))
 	assert.False(t, isASCII("🧡💛💚💙💜"))
 }
+
+func TestSafeInt8(t *testing.T) {
+	assert.Equal(t, int8(100), safeInt8(100))
+	assert.Equal(t, int8(math.MaxInt8), safeInt8(int(math.MaxInt8)+123))
+}
+
+func TestSafeUint16(t *testing.T) {
+	assert.Equal(t, uint16(100), safeUint16(100))
+	assert.Equal(t, uint16(math.MaxUint16), safeUint16(int(math.MaxUint16)+123))
+}