Update xhttp

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)
+}