fixup: some function return 'this'

Signed-off-by: gaoguodong <gaoguodong@sunniwell.net>
modify: network

Signed-off-by: gaoguodong <gaoguodong@sunniwell.net>
fixup: patch for lithium.js

Signed-off-by: gaoguodong <gaoguodong@sunniwell.net>