/ADNS.py

http://adns-python.googlecode.com/ · Python · 71 lines · 52 code · 17 blank · 2 comment · 13 complexity · 9eed263002f3ac725128dbfb7c690f79 MD5 · raw file

  1. #!/usr/bin/python
  2. """High-level interface to adns."""
  3. import adns
  4. from exceptions import Exception
  5. class Error(Exception): pass
  6. class QueryEngine:
  7. callback_submit = None
  8. callback_submit_reverse = None
  9. callback_submit_reverse_any = None
  10. def __init__(self, s=None):
  11. self._s = s or adns.init(adns.iflags.noautosys)
  12. self._queries = {}
  13. def synchronous(self, qname, rr, flags=0):
  14. return self._s.synchronous(qname, rr, flags)
  15. def submit(self, qname, rr, flags=0, callback=None, extra=None):
  16. callback = callback or self.callback_submit
  17. if not callback: raise Error, "callback required"
  18. q = self._s.submit(qname, rr, flags)
  19. self._queries[q] = qname, rr, flags, callback, extra
  20. def submit_reverse(self, qname, rr, flags=0, callback=None, extra=None):
  21. callback = callback or self.callback_submit_reverse
  22. if not callback: raise Error, "callback required"
  23. q = self._s.submit_reverse(qname, rr, flags)
  24. self._queries[q] = qname, rr, flags, callback, extra
  25. def submit_reverse_any(self, qname, rr, flags=0,
  26. callback=None, extra=None):
  27. callback = callback or self.callback_submit_reverse_any
  28. if not callback: raise Error, "callback required"
  29. q = self._s.submit_reverse_any(qname, rr, flags)
  30. self._queries[q] = qname, rr, flags, callback, extra
  31. def cancel(self, query):
  32. query.cancel()
  33. try: del self._queries[query]
  34. except KeyError: pass
  35. def run(self, timeout=0):
  36. for q in self._s.completed(timeout):
  37. answer = q.check()
  38. qname, rr, flags, callback, extra = self._queries[q]
  39. del self._queries[q]
  40. apply(callback, (answer, qname, rr, flags, extra))
  41. def finished(self):
  42. return not len(self._queries)
  43. def finish(self):
  44. while not self.finished():
  45. self.run(1)
  46. def run_max(self, max):
  47. from time import time
  48. quittime = time()+max
  49. while not self.finished() and time()<=quittime:
  50. self.run(1)
  51. def globalsystemfailure(self):
  52. self._s.globalsystemfailure()
  53. self._queries.clear()
  54. init = QueryEngine