plugin.py

   1 import os, shutil, re, 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):
  62         """Return only the desired portion of the list, as specified by
  63            ItemCount, AnchorItem and AnchorOffset
  64         """
  65         totalFiles = len(files)
  66         index = 0
  67
  68         if query.has_key('ItemCount'):
  69             count = int(query['ItemCount'][0])
  70
  71             if query.has_key('AnchorItem'):
  72                 bs = '/TiVoConnect?Command=QueryContainer&Container='
  73                 local_base_path = self.get_local_base_path(handler, query)
  74
  75                 anchor = query['AnchorItem'][0]
  76                 if anchor.startswith(bs):
  77                     anchor = anchor.replace(bs, '/')
  78                 anchor = unquote(anchor)
  79                 anchor = anchor.replace(os.path.sep + cname, local_base_path)
  80                 anchor = os.path.normpath(anchor)
  81
  82                 try:
  83                     index = files.index(anchor)
  84                 except ValueError:
  85                     print 'Anchor not found:', anchor  # just use index = 0
  86
  87                 if count > 0:
  88                     index += 1
  89
  90                 if query.has_key('AnchorOffset'):
  91                     index += int(query['AnchorOffset'][0])
  92
  93                 #foward count
  94                 if count > 0:
  95                     files = files[index:index + count]
  96                 #backwards count
  97                 elif count < 0:
  98                     if index + count < 0:
  99                         count = -index
 100                     files = files[index + count:index]
 101                     index += count
 102
 103             else:  # No AnchorItem
 104
 105                 if count >= 0:
 106                     files = files[:count]
 107                 else:
 108                     index = count % len(files)
 109                     files = files[count:]
 110
 111         return files, totalFiles, index
 112
 113     def get_files(self, handler, query, filterFunction=None):
 114         subcname = query['Container'][0]
 115         cname = subcname.split('/')[0]
 116         path = self.get_local_path(handler, query)
 117
 118         files = [ os.path.join(path, file) for file in os.listdir(path)]
 119         if query.get('Recurse',['No'])[0]  == 'Yes':
 120             for file in files:
 121                 if os.path.isdir(file):
 122                     for new_file in os.listdir(file):
 123                         files.append( os.path.join(file, new_file) )
 124
 125         file_type = query.get('Filter', [''])[0]
 126         if filterFunction:
 127             files = [file for file in files if filterFunction(file, file_type)]
 128
 129         totalFiles = len(files)
 130
 131         def dir_sort(x, y):
 132             xdir = os.path.isdir(os.path.join(path, x))
 133             ydir = os.path.isdir(os.path.join(path, y))
 134
 135             if xdir == ydir:
 136                 return name_sort(x, y)
 137             else:
 138                 return ydir - xdir
 139
 140         def name_sort(x, y):
 141             numbername = re.compile(r'(\d*)(.*)')
 142             m = numbername.match(x)
 143             xNumber = m.group(1)
 144             xStr = m.group(2)
 145             m = numbername.match(y)
 146             yNumber = m.group(1)
 147             yStr = m.group(2)
 148
 149             if xNumber and yNumber:
 150                 xNumber, yNumber = int(xNumber), int(yNumber)
 151                 if xNumber == yNumber:
 152                     return cmp(xStr, yStr)
 153                 else:
 154                     return cmp(xNumber, yNumber)
 155             elif xNumber:
 156                 return -1
 157             elif yNumber:
 158                 return 1
 159             else:
 160                 return cmp(xStr, yStr)
 161
 162         if query.get('SortOrder',['Normal'])[0] == 'Random':
 163             seed = query.get('RandomSeed', ['1'])[0]
 164             self.random_lock.acquire()
 165             random.seed(seed)
 166             random.shuffle(files)
 167             self.random_lock.release()
 168         else:
 169             files.sort(dir_sort)
 170
 171         # Trim the list
 172         return self.item_count(handler, query, cname, files)