Update xhttp

common/xray/pipe/impl.go

@@ -3,7 +3,6 @@ package pipe
 import (
 	"errors"
 	"io"
-	"runtime"
 	"sync"
 	"time"
 
@@ -136,11 +135,10 @@ func (p *pipe) writeMultiBufferInternal(mb buf.MultiBuffer) error {
 
 	if p.data == nil {
 		p.data = mb
-		return nil
+	} else {
+		p.data, _ = buf.MergeMulti(p.data, mb)
 	}
-
-	p.data, _ = buf.MergeMulti(p.data, mb)
-	return errSlowDown
+	return nil
 }
 
 func (p *pipe) WriteMultiBuffer(mb buf.MultiBuffer) error {
@@ -155,30 +153,23 @@ func (p *pipe) WriteMultiBuffer(mb buf.MultiBuffer) error {
 			return nil
 		}
 
-		if err == errSlowDown {
-			p.readSignal.Signal()
-
-			// Yield current goroutine. Hopefully the reading counterpart can pick up the payload.
-			runtime.Gosched()
-			return nil
+		if err == errBufferFull {
+			if p.option.discardOverflow {
+				buf.ReleaseMulti(mb)
+				return nil
+			}
+			select {
+			case <-p.writeSignal.Wait():
+				continue
+			case <-p.done.Wait():
+				buf.ReleaseMulti(mb)
+				return io.ErrClosedPipe
+			}
 		}
 
-		if err == errBufferFull && p.option.discardOverflow {
-			buf.ReleaseMulti(mb)
-			return nil
-		}
-
-		if err != errBufferFull {
-			buf.ReleaseMulti(mb)
-			p.readSignal.Signal()
-			return err
-		}
-
-		select {
-		case <-p.writeSignal.Wait():
-		case <-p.done.Wait():
-			return io.ErrClosedPipe
-		}
+		buf.ReleaseMulti(mb)
+		p.readSignal.Signal()
+		return err
 	}
 }
 

common/xray/utils/browser.go

@@ -0,0 +1,28 @@
+package utils
+
+import (
+	"math/rand"
+	"strconv"
+	"time"
+
+	"github.com/klauspost/cpuid/v2"
+)
+
+func ChromeVersion() int {
+	// Use only CPU info as seed for PRNG
+	seed := int64(cpuid.CPU.Family + cpuid.CPU.Model + cpuid.CPU.PhysicalCores + cpuid.CPU.LogicalCores + cpuid.CPU.CacheLine)
+	rng := rand.New(rand.NewSource(seed))
+	// Start from Chrome 144 released on 2026.1.13
+	releaseDate := time.Date(2026, 1, 13, 0, 0, 0, 0, time.UTC)
+	version := 144
+	now := time.Now()
+	// Each version has random 25-45 day interval
+	for releaseDate.Before(now) {
+		releaseDate = releaseDate.AddDate(0, 0, rng.Intn(21)+25)
+		version++
+	}
+	return version - 1
+}
+
+// ChromeUA provides default browser User-Agent based on CPU-seeded PRNG.
+var ChromeUA = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/" + strconv.Itoa(ChromeVersion()) + ".0.0.0 Safari/537.36"

common/xray/utils/padding.go

@@ -0,0 +1,24 @@
+package utils
+
+import (
+	"math/rand/v2"
+)
+
+var (
+	// 8 ÷ (397/62)
+	h2packCorrectionFactor = 1.2493702770780857
+	base62TotalCharsNum    = 62
+	base62Chars            = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+)
+
+// H2Base62Pad generates a base62 padding string for HTTP/2 header
+// The total len will be slightly longer than the input to match the length after h2(h3 also) header huffman encoding
+func H2Base62Pad[T int32 | int64 | int](expectedLen T) string {
+	actualLenFloat := float64(expectedLen) * h2packCorrectionFactor
+	actualLen := int(actualLenFloat)
+	result := make([]byte, actualLen)
+	for i := range actualLen {
+		result[i] = base62Chars[rand.N(base62TotalCharsNum)]
+	}
+	return string(result)
+}

common/xray/uuid/uuid.go

@@ -85,10 +85,14 @@ func ParseString(str string) (UUID, error) {
 	b := uuid.Bytes()
 
 	for _, byteGroup := range byteGroups {
-		if text[0] == '-' {
+		if len(text) > 0 && text[0] == '-' {
 			text = text[1:]
 		}
 
+		if len(text) < byteGroup {
+			return uuid, E.New("invalid UUID: ", str)
+		}
+
 		if _, err := hex.Decode(b[:byteGroup/2], text[:byteGroup]); err != nil {
 			return uuid, err
 		}