routefs/examples/pyhesiodfs.py

   1 #!/usr/bin/python
   2
   3 import hesiod
   4 import routefs
   5 from routes import Mapper
   6
   7 class PyHesiodFS(routefs.RouteFS):
   8     def __init__(self, *args, **kwargs):
   9         super(PyHesiodFS, self).__init__(*args, **kwargs)
  10
  11         self.cache = {}
  12
  13     def make_map(self):
  14         m = Mapper()
  15         m.connect('', controller='getList')
  16         m.connect('README.txt', controller='getReadme')
  17         m.connect(':action', controller='getLocker')
  18         return m
  19
  20     def getLocker(self, action, **kwargs):
  21         if action in self.cache:
  22             return routefs.Symlink(self.cache[action])
  23
  24         try:
  25             filsys = hesiod.FilsysLookup(action).filsys[0]
  26             if filsys['type'] == 'AFS':
  27                 self.cache[action] = filsys['location']
  28                 return routefs.Symlink(self.cache[action])
  29         except (TypeError, KeyError, IndexError):
  30             return
  31
  32     def getList(self, **kwargs):
  33         return routefs.Directory(self.cache.keys() + ['README.txt'])
  34
  35     def getReadme(self, **kwargs):
  36         return routefs.File("""
  37 This is the pyHesiodFS FUSE automounter. To access a Hesiod filsys,
  38 just access /mit/name.
  39
  40 If you're using the Finder, try pressing Cmd+Shift+G and then entering
  41 /mit/name
  42 """)
  43
  44 if __name__ == '__main__':
  45     routefs.main(PyHesiodFS)