Improve error handling in spider
Improve error handling in spider

DDShadoww/grab,alihalabyah/grab,subeax/grab,liorvh/grab,istinspring/grab,lorien/grab,giserh/grab,pombredanne/grab-1,alihalabyah/grab,huiyi1990/grab,SpaceAppsXploration/grab,maurobaraldi/grab,lorien/grab,huiyi1990/grab,giserh/grab,shaunstanislaus/grab,istinspring/grab,liorvh/grab,pombredanne/grab-1,DDShadoww/grab,kevinlondon/grab,codevlabs/grab,SpaceAppsXploration/grab,subeax/grab,maurobaraldi/grab,codevlabs/grab,raybuhr/grab,raybuhr/grab,subeax/grab,shaunstanislaus/grab,kevinlondon/grab