fix bufio write,add flush

liuxiaolong

2019-12-20 f6b93c1168a03be132ec10a74ad311c90b7f5c6e

 service/SdkDownLoad.go

@@ -10,7 +10,7 @@
   "net/http"
   "os"
   "strings"
   "webserver/extend/logger"
   "basic.com/valib/logger.git"

   "webserver/util"
)