set default value for base_url
set default value for base_url

Keystion/JustWriting,hjue/JustWriting,jockchou/JustWriting,hjue/JustWriting,hjue/JustWriting,beealone/JustWriting,moqiguzhu/JustWriting,moqiguzhu/JustWriting,Keystion/JustWriting,beealone/JustWriting,jockchou/JustWriting,xiaotianhu/JustWriting,beealone/JustWriting,jockchou/JustWriting,moqiguzhu/JustWriting,xiaotianhu/JustWriting,xiaotianhu/JustWriting