Add details of invalid operations in JSON
Bug fix and GBK support

1. GBK support
2. Show invalid operation details in non-p2dv mode
3. Bug fix `os.sleep` to `time.sleep`
bug fix & listen to `0.0.0.0:12345` in non-p2dv mode
Merge pull request #10 from abcdabcd987/master

Show invalid operation details & GBK support