plugin.py

   1 import os
   2 import shutil
   3 import random
   4 import threading
   5 import urllib
   6 from urlparse import urlparse
   7
   8 if os.path.sep == '/':
   9     quote = urllib.quote
  10     unquote = urllib.unquote_plus
  11 else:
  12     quote = lambda x: urllib.quote(x.replace(os.path.sep, '/'))
  13     unquote = lambda x: urllib.unquote_plus(x).replace('/', os.path.sep)
  14
  15 class Error:
  16     CONTENT_TYPE = 'text/html'
  17
  18 def GetPlugin(name):
  19     try:
  20         module_name = '.'.join(['plugins', name, name])
  21         module = __import__(module_name, globals(), locals(), name)
  22         plugin = getattr(module, module.CLASS_NAME)()
  23         return plugin
  24     except ImportError:
  25         print 'Error no', name, 'plugin exists. Check the type ' \
  26         'setting for your share.'
  27         return Error
  28
  29 class Plugin(object):
  30
  31     random_lock = threading.Lock()
  32
  33     CONTENT_TYPE = ''
  34
  35     def __new__(cls, *args, **kwds):
  36         it = cls.__dict__.get('__it__')
  37         if it is not None:
  38             return it
  39         cls.__it__ = it = object.__new__(cls)
  40         it.init(*args, **kwds)
  41         return it
  42
  43     def init(self):
  44         pass
  45
  46     def send_file(self, handler, container, name):
  47         o = urlparse("http://fake.host" + handler.path)
  48         path = unquote(o[2])
  49         handler.send_response(200)
  50         handler.end_headers()
  51         f = file(container['path'] + path[len(name) + 1:], 'rb')
  52         shutil.copyfileobj(f, handler.wfile)
  53
  54     def get_local_base_path(self, handler, query):
  55
  56         subcname = query['Container'][0]
  57         container = handler.server.containers[subcname.split('/')[0]]
  58
  59         return os.path.normpath(container['path'])
  60
  61     def get_local_path(self, handler, query):
  62
  63         subcname = query['Container'][0]
  64         container = handler.server.containers[subcname.split('/')[0]]
  65
  66         path = os.path.normpath(container['path'])
  67         for folder in subcname.split('/')[1:]:
  68             if folder == '..':
  69                 return False
  70             path = os.path.join(path, folder)
  71         return path
  72
  73     def item_count(self, handler, query, cname, files, last_start=0):
  74         """Return only the desired portion of the list, as specified by
  75            ItemCount, AnchorItem and AnchorOffset. 'files' is either a
  76            list of strings, OR a list of objects with a 'name' attribute.
  77         """
  78         totalFiles = len(files)
  79         index = 0
  80
  81         if totalFiles and 'ItemCount' in query:
  82             count = int(query['ItemCount'][0])
  83
  84             if 'AnchorItem' in query:
  85                 bs = '/TiVoConnect?Command=QueryContainer&Container='
  86                 local_base_path = self.get_local_base_path(handler, query)
  87
  88                 anchor = query['AnchorItem'][0]
  89                 if anchor.startswith(bs):
  90                     anchor = anchor.replace(bs, '/', 1)
  91                 anchor = unquote(anchor)
  92                 anchor = anchor.replace(os.path.sep + cname, local_base_path, 1)
  93                 if not '://' in anchor:
  94                     anchor = os.path.normpath(anchor)
  95
  96                 if type(files[0]) == str:
  97                     filenames = files
  98                 else:
  99                     filenames = [x.name for x in files]
 100                 try:
 101                     index = filenames.index(anchor, last_start)
 102                 except ValueError:
 103                     if last_start:
 104                         try:
 105                             index = filenames.index(anchor, 0, last_start)
 106                         except ValueError:
 107                             print 'Anchor not found:', anchor
 108                     else:
 109                         print 'Anchor not found:', anchor  # just use index = 0
 110
 111                 if count > 0:
 112                     index += 1
 113
 114                 if 'AnchorOffset' in query:
 115                     index += int(query['AnchorOffset'][0])
 116
 117                 #foward count
 118                 if count >= 0:
 119                     files = files[index:index + count]
 120                 #backwards count
 121                 else:
 122                     if index + count < 0:
 123                         count = -index
 124                     files = files[index + count:index]
 125                     index += count
 126
 127             else:  # No AnchorItem
 128
 129                 if count >= 0:
 130                     files = files[:count]
 131                 else:
 132                     index = count % len(files)
 133                     files = files[count:]
 134
 135         return files, totalFiles, index
 136
 137     def get_files(self, handler, query, filterFunction=None):
 138
 139         def build_recursive_list(path, recurse=True):
 140             files = []
 141             try:
 142                 for f in os.listdir(path):
 143                     if f.startswith('.'):
 144                         continue
 145                     f = os.path.join(path, f)
 146                     if recurse and os.path.isdir(f):
 147                         files.extend(build_recursive_list(f))
 148                     else:
 149                        if not filterFunction or filterFunction(f, file_type):
 150                            files.append(f)
 151             except:
 152                 pass
 153             return files
 154
 155         subcname = query['Container'][0]
 156         cname = subcname.split('/')[0]
 157         path = self.get_local_path(handler, query)
 158
 159         file_type = query.get('Filter', [''])[0]
 160
 161         recurse = query.get('Recurse',['No'])[0] == 'Yes'
 162         files = build_recursive_list(path, recurse)
 163
 164         totalFiles = len(files)
 165
 166         def dir_sort(x, y):
 167             xdir = os.path.isdir(os.path.join(path, x))
 168             ydir = os.path.isdir(os.path.join(path, y))
 169
 170             if xdir == ydir:
 171                 return name_sort(x, y)
 172             else:
 173                 return ydir - xdir
 174
 175         def name_sort(x, y):
 176             return cmp(x, y)
 177
 178         if query.get('SortOrder',['Normal'])[0] == 'Random':
 179             seed = query.get('RandomSeed', ['1'])[0]
 180             self.random_lock.acquire()
 181             random.seed(seed)
 182             random.shuffle(files)
 183             self.random_lock.release()
 184         else:
 185             files.sort(dir_sort)
 186
 187         # Trim the list
 188         return self.item_count(handler, query, cname, files)