chore: modernize code with go fix

clientip/clientip_test.go

@@ -311,7 +311,7 @@ func TestAddressesAndRangesToIPNets(t *testing.T) {
 			}
 
 			require.Equal(t, len(tt.want), len(got))
-			for i := 0; i < len(got); i++ {
+			for i := range got {
 				if got[i].String() != tt.want[i] {
 					assert.Equal(t, tt.want[i], got[i].String())
 				}

context_test.go

@@ -485,7 +485,6 @@ func TestWrapF(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		tc := tc
 
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
@@ -554,7 +553,6 @@ func TestWrapH(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		tc := tc
 
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()

fox_test.go

@@ -4296,7 +4296,7 @@ func TestRouter_ServeHTTP_Concurrent(t *testing.T) {
 	var wg sync.WaitGroup
 	wg.Add(300)
 	start, wait := atomicSync()
-	for i := 0; i < 100; i++ {
+	for range 100 {
 		go func() {
 			defer wg.Done()
 			wait()

internal/simplelru/lru.go

@@ -153,10 +153,7 @@ func (c *LRU[K, V]) Cap() int {
 
 // Resize changes the cache size.
 func (c *LRU[K, V]) Resize(size int) (evicted int) {
-	diff := c.Len() - size
-	if diff < 0 {
-		diff = 0
-	}
+	diff := max(c.Len()-size, 0)
 	for i := 0; i < diff; i++ {
 		c.removeOldest()
 	}

internal/simplelru/lru_test.go

@@ -22,7 +22,7 @@ func TestLRU_Basics(t *testing.T) {
 		t.Fatalf("err: %v", err)
 	}
 
-	for i := 0; i < 256; i++ {
+	for i := range 256 {
 		l.Add(i, i)
 	}
 	if l.Len() != 128 {
@@ -46,7 +46,7 @@ func TestLRU_Basics(t *testing.T) {
 			t.Fatalf("bad value: %v", v)
 		}
 	}
-	for i := 0; i < 128; i++ {
+	for i := range 128 {
 		if _, ok := l.Get(i); ok {
 			t.Fatalf("should be evicted")
 		}
@@ -90,7 +90,7 @@ func TestLRU_GetOldest_RemoveOldest(t *testing.T) {
 	if err != nil {
 		t.Fatalf("err: %v", err)
 	}
-	for i := 0; i < 256; i++ {
+	for i := range 256 {
 		l.Add(i, i)
 	}
 	k, _, ok := l.GetOldest()

internal/slogpretty/handler.go

@@ -10,6 +10,7 @@ import (
 	"io"
 	"log/slog"
 	"os"
+	"strings"
 	"sync"
 	"time"
 
@@ -114,15 +115,15 @@ func (h *Handler) Handle(_ context.Context, record slog.Record) error {
 	}
 	buf = append(buf, " | "...)
 
-	lastGroup := ""
+	var lastGroup strings.Builder
 	for _, goa := range h.Goa {
 		switch {
 		case goa.group != "":
-			lastGroup += goa.group + "."
+			lastGroup.WriteString(goa.group + ".")
 		default:
 			attr := goa.attr
-			if lastGroup != "" {
-				attr.Key = lastGroup + attr.Key
+			if lastGroup.String() != "" {
+				attr.Key = lastGroup.String() + attr.Key
 			}
 
 			buf = appendAttr(record.Level, buf, attr)
@@ -132,8 +133,8 @@ func (h *Handler) Handle(_ context.Context, record slog.Record) error {
 	// If there are additional attributes, append them to the log record.
 	if record.NumAttrs() > 0 {
 		record.Attrs(func(attr slog.Attr) bool {
-			if lastGroup != "" {
-				attr.Key = lastGroup + attr.Key
+			if lastGroup.String() != "" {
+				attr.Key = lastGroup.String() + attr.Key
 			}
 			buf = appendAttr(record.Level, buf, attr)
 

matcher.go

@@ -6,6 +6,7 @@ import (
 	"net"
 	"net/http"
 	"regexp"
+	"slices"
 	"strings"
 
 	"github.com/fox-toolkit/fox/internal/netutil"
@@ -59,12 +60,7 @@ func (m QueryMatcher) Match(c RequestContext) bool {
 	if len(values) == 0 {
 		return false
 	}
-	for _, v := range values {
-		if v == m.value {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(values, m.value)
 }
 
 // Equal reports whether matcher is a [QueryMatcher] with the same key and value.
@@ -129,12 +125,7 @@ func (m QueryRegexpMatcher) Match(c RequestContext) bool {
 	if len(values) == 0 {
 		return false
 	}
-	for _, v := range values {
-		if m.regex.MatchString(v) {
-			return true
-		}
-	}
-	return false
+	return slices.ContainsFunc(values, m.regex.MatchString)
 }
 
 // Equal reports whether matcher is a [QueryRegexpMatcher] with the same key and regular expression source.
@@ -182,12 +173,7 @@ func (m HeaderMatcher) Match(c RequestContext) bool {
 	if len(values) == 0 {
 		return false
 	}
-	for _, v := range values {
-		if v == m.value {
-			return true
-		}
-	}
-	return false
+	return slices.Contains(values, m.value)
 }
 
 // Equal reports whether matcher is a [HeaderMatcher] with the same key and value.
@@ -247,12 +233,7 @@ func (m HeaderRegexpMatcher) Match(c RequestContext) bool {
 	if len(values) == 0 {
 		return false
 	}
-	for _, v := range values {
-		if m.regex.MatchString(v) {
-			return true
-		}
-	}
-	return false
+	return slices.ContainsFunc(values, m.regex.MatchString)
 }
 
 // Equal reports whether matcher is a [HeaderRegexpMatcher] with the same key and regular expression source.

params_test.go

@@ -101,7 +101,6 @@ func TestParamsFromContext(t *testing.T) {
 	}
 
 	for _, tc := range cases {
-		tc := tc
 
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()

path_test.go

@@ -85,7 +85,6 @@ func TestCleanPath_Mallocs(t *testing.T) {
 	}
 
 	for _, test := range cleanTests {
-		test := test
 		allocs := testing.AllocsPerRun(100, func() { CleanPath(test.result) })
 		if allocs > 0 {
 			t.Errorf("CleanPath(%q): %v allocs, want zero", test.result, allocs)

recovery.go

@@ -83,12 +83,12 @@ func recovery(logger *slog.Logger, c *Context, handle RecoveryFunc) {
 			sb.Write(before)
 			for header := range iterutil.SplitBytesSeq(after, reqHeaderSep) {
 				sb.Write(reqHeaderSep)
-				idx := bytes.IndexByte(header, ':')
-				if idx < 0 {
+				before0, _, ok := bytes.Cut(header, []byte{':'})
+				if !ok {
 					continue
 				}
-				if slices.Contains(blacklistedHeader, string(header[:idx])) {
-					sb.Write(header[:idx])
+				if slices.Contains(blacklistedHeader, string(before0)) {
+					sb.Write(before0)
 					sb.WriteString(": <redacted>")
 					continue
 				}