plugin.py

   1 import os, shutil, random, threading, urllib
   2 from urlparse import urlparse
   3
   4 if os.path.sep == '/':
   5     quote = urllib.quote
   6     unquote = urllib.unquote_plus
   7 else:
   8     quote = lambda x: urllib.quote(x.replace(os.path.sep, '/'))
   9     unquote = lambda x: urllib.unquote_plus(x).replace('/', os.path.sep)
  10
  11 def GetPlugin(name):
  12     module_name = '.'.join(['plugins', name, name])
  13     module = __import__(module_name, globals(), locals(), name)
  14     plugin = getattr(module, module.CLASS_NAME)()
  15     return plugin
  16
  17 class Plugin(object):
  18
  19     random_lock = threading.Lock()
  20
  21     CONTENT_TYPE = ''
  22
  23     def __new__(cls, *args, **kwds):
  24         it = cls.__dict__.get('__it__')
  25         if it is not None:
  26             return it
  27         cls.__it__ = it = object.__new__(cls)
  28         it.init(*args, **kwds)
  29         return it
  30
  31     def init(self):
  32         pass
  33
  34     def send_file(self, handler, container, name):
  35         o = urlparse("http://fake.host" + handler.path)
  36         path = unquote(o[2])
  37         handler.send_response(200)
  38         handler.end_headers()
  39         f = file(container['path'] + path[len(name)+1:], 'rb')
  40         shutil.copyfileobj(f, handler.wfile)
  41
  42     def get_local_base_path(self, handler, query):
  43
  44         subcname = query['Container'][0]
  45         container = handler.server.containers[subcname.split('/')[0]]
  46
  47         return container['path']
  48
  49     def get_local_path(self, handler, query):
  50
  51         subcname = query['Container'][0]
  52         container = handler.server.containers[subcname.split('/')[0]]
  53
  54         path = container['path']
  55         for folder in subcname.split('/')[1:]:
  56             if folder == '..':
  57                 return False
  58             path = os.path.join(path, folder)
  59         return path
  60
  61     def item_count(self, handler, query, cname, files, last_start=0):
  62         """Return only the desired portion of the list, as specified by
  63            ItemCount, AnchorItem and AnchorOffset. 'files' is either a
  64            list of strings, OR a list of objects with a 'name' attribute.
  65         """
  66         totalFiles = len(files)
  67         index = 0
  68
  69         if totalFiles and query.has_key('ItemCount'):
  70             count = int(query['ItemCount'][0])
  71
  72             if query.has_key('AnchorItem'):
  73                 bs = '/TiVoConnect?Command=QueryContainer&Container='
  74                 local_base_path = self.get_local_base_path(handler, query)
  75
  76                 anchor = query['AnchorItem'][0]
  77                 if anchor.startswith(bs):
  78                     anchor = anchor.replace(bs, '/')
  79                 anchor = unquote(anchor)
  80                 anchor = anchor.replace(os.path.sep + cname, local_base_path)
  81                 if not '://' in anchor:
  82                     anchor = os.path.normpath(anchor)
  83
  84                 if type(files[0]) == str:
  85                     filenames = files
  86                 else:
  87                     filenames = [x.name for x in files]
  88                 try:
  89                     index = filenames.index(anchor, last_start)
  90                 except ValueError:
  91                     if last_start:
  92                         try:
  93                             index = filenames.index(anchor, 0, last_start)
  94                         except ValueError:
  95                             print 'Anchor not found:', anchor
  96                     else:
  97                         print 'Anchor not found:', anchor  # just use index = 0
  98
  99                 if count > 0:
 100                     index += 1
 101
 102                 if query.has_key('AnchorOffset'):
 103                     index += int(query['AnchorOffset'][0])
 104
 105                 #foward count
 106                 if count >= 0:
 107                     files = files[index:index + count]
 108                 #backwards count
 109                 else:
 110                     if index + count < 0:
 111                         count = -index
 112                     files = files[index + count:index]
 113                     index += count
 114
 115             else:  # No AnchorItem
 116
 117                 if count >= 0:
 118                     files = files[:count]
 119                 else:
 120                     index = count % len(files)
 121                     files = files[count:]
 122
 123         return files, totalFiles, index
 124
 125     def get_files(self, handler, query, filterFunction=None):
 126
 127         def build_recursive_list(path, recurse=True):
 128             files = []
 129             for file in os.listdir(path):
 130                 file = os.path.join(path, file)
 131                 if recurse and os.path.isdir(file):
 132                     files.extend(build_recursive_list(file))
 133                 else:
 134                    if not filterFunction or filterFunction(file, file_type):
 135                        files.append(file)
 136             return files
 137
 138         subcname = query['Container'][0]
 139         cname = subcname.split('/')[0]
 140         path = self.get_local_path(handler, query)
 141
 142         file_type = query.get('Filter', [''])[0]
 143
 144         recurse = query.get('Recurse',['No'])[0] == 'Yes'
 145         files = build_recursive_list(path, recurse)
 146
 147         totalFiles = len(files)
 148
 149         def dir_sort(x, y):
 150             xdir = os.path.isdir(os.path.join(path, x))
 151             ydir = os.path.isdir(os.path.join(path, y))
 152
 153             if xdir == ydir:
 154                 return name_sort(x, y)
 155             else:
 156                 return ydir - xdir
 157
 158         def name_sort(x, y):
 159             return cmp(x, y)
 160
 161         if query.get('SortOrder',['Normal'])[0] == 'Random':
 162             seed = query.get('RandomSeed', ['1'])[0]
 163             self.random_lock.acquire()
 164             random.seed(seed)
 165             random.shuffle(files)
 166             self.random_lock.release()
 167         else:
 168             files.sort(dir_sort)
 169
 170         # Trim the list
 171         return self.item_count(handler, query, cname, files)