STOR-519: Add db-connect, a SQL over HTTPS server

vendor/github.com/kshvakov/clickhouse/lib/data/server_info.go

@@ -0,0 +1,47 @@
+package data
+
+import (
+	"fmt"
+	//"io"
+	"time"
+
+	"github.com/kshvakov/clickhouse/lib/binary"
+	"github.com/kshvakov/clickhouse/lib/protocol"
+)
+
+type ServerInfo struct {
+	Name         string
+	Revision     uint64
+	MinorVersion uint64
+	MajorVersion uint64
+	Timezone     *time.Location
+}
+
+func (srv *ServerInfo) Read(decoder *binary.Decoder) (err error) {
+	if srv.Name, err = decoder.String(); err != nil {
+		return fmt.Errorf("could not read server name: %v", err)
+	}
+	if srv.MajorVersion, err = decoder.Uvarint(); err != nil {
+		return fmt.Errorf("could not read server major version: %v", err)
+	}
+	if srv.MinorVersion, err = decoder.Uvarint(); err != nil {
+		return fmt.Errorf("could not read server minor version: %v", err)
+	}
+	if srv.Revision, err = decoder.Uvarint(); err != nil {
+		return fmt.Errorf("could not read server revision: %v", err)
+	}
+	if srv.Revision >= protocol.DBMS_MIN_REVISION_WITH_SERVER_TIMEZONE {
+		timezone, err := decoder.String()
+		if err != nil {
+			return fmt.Errorf("could not read server timezone: %v", err)
+		}
+		if srv.Timezone, err = time.LoadLocation(timezone); err != nil {
+			return fmt.Errorf("could not load time location: %v", err)
+		}
+	}
+	return nil
+}
+
+func (srv ServerInfo) String() string {
+	return fmt.Sprintf("%s %d.%d.%d (%s)", srv.Name, srv.MajorVersion, srv.MinorVersion, srv.Revision, srv.Timezone)
+}