Fix decode gzipPcaked bug.

mtproto/decode.go

@@ -312,15 +312,17 @@ func (m *DecodeBuf) Object() (r TLObject) {
 
 	r = NewTLObjectByClassID(classID)
 	if r == nil {
-		glog.Errorf("Can't find registed classId: %d", classID)
+		m.err = fmt.Errorf("can't find registed classId: 0x%x", uint32(classID))
+		glog.Error(m.err)
 		return nil
 	}
 
-	glog.Infof("NewTLObjectByClassID, classID: %x", uint32(classID))
+	glog.Infof("newTLObjectByClassID, classID: 0x%x", uint32(classID))
 
 	err := r.(TLObject).Decode(m)
 	if err != nil {
-		glog.Error("Object(", classID, ") decode error: ", err, "")
+		m.err = err
+		glog.Errorf("object(0x%x) decode error: %v", uint32(classID), err)
 	}
 	return
 }

mtproto/parsed_manually_types.go

@@ -24,6 +24,7 @@ import (
 	"encoding/hex"
 	"fmt"
 	"github.com/golang/glog"
+	"io"
 )
 
 //const (
@@ -261,32 +262,36 @@ func (m *TLGzipPacked) EncodeToLayer(int) []byte {
 }
 
 func (m *TLGzipPacked) Decode(dbuf *DecodeBuf) error {
-	m.PackedData = make([]byte, 0, 4096)
+	data := dbuf.StringBytes()
+	if dbuf.err != nil {
+		return dbuf.err
+	}
+	gz, err := gzip.NewReader(bytes.NewBuffer(data))
+	if err != nil {
+		dbuf.err = err
+		return fmt.Errorf("gzip read: %v", err)
+	}
 
 	var buf bytes.Buffer
-	_, _ = buf.Write(dbuf.StringBytes())
-	gz, _ := gzip.NewReader(&buf)
-
-	b := make([]byte, 4096)
-	for true {
-		n, _ := gz.Read(b)
-		if n <= 0 {
-			break
-		}
-		m.PackedData = append(m.PackedData, b[0:n]...)
+	_, err = io.Copy(&buf, gz)
+	clErr := gz.Close()
+
+	if err != nil {
+		dbuf.err = err
+		return fmt.Errorf("gzip read: %v", err)
+	}
+	if clErr != nil {
+		dbuf.err = clErr
+		return clErr
 	}
 
-	// decode
-	if dbuf.err == nil {
-		dbuf2 := NewDecodeBuf(m.PackedData)
-		m.Obj = dbuf2.Object()
-		if m.Obj == nil {
+	m.PackedData = buf.Bytes()
 
-		}
-		return dbuf2.err
-	} else {
-		return dbuf.err
-	}
+	dbuf2 := NewDecodeBuf(m.PackedData)
+	m.Obj = dbuf2.Object()
+	dbuf.err = dbuf2.err
+
+	return dbuf.err
 }
 
 ///////////////////////////////////////////////////////////////////////////////