Merge pull request #9 from cnnic/master

merge from cnnic
query ip with net
fix bug - ip/domain redirect
add redirect exception handler
Merge pull request #112 from forumbyr/master

fix bug - ip/domain redirect
del unused code
Merge pull request #113 from forumbyr/master

del unused code
update html error show
update test
error handle
update prop
Merge pull request #115 from forumbyr/master

update html error show
Merge pull request #10 from cnnic/master

fetch from cnnic