plugin.py

   1 import os
   2 import random
   3 import shutil
   4 import sys
   5 import threading
   6 import time
   7 import unicodedata
   8 import urllib
   9
  10 from Cheetah.Filters import Filter
  11 from lrucache import LRUCache
  12
  13 if os.path.sep == '/':
  14     quote = urllib.quote
  15     unquote = urllib.unquote_plus
  16 else:
  17     quote = lambda x: urllib.quote(x.replace(os.path.sep, '/'))
  18     unquote = lambda x: os.path.normpath(urllib.unquote_plus(x))
  19
  20 class Error:
  21     CONTENT_TYPE = 'text/html'
  22
  23 def GetPlugin(name):
  24     try:
  25         module_name = '.'.join(['plugins', name, name])
  26         module = __import__(module_name, globals(), locals(), name)
  27         plugin = getattr(module, module.CLASS_NAME)()
  28         return plugin
  29     except ImportError:
  30         print 'Error no', name, 'plugin exists. Check the type ' \
  31         'setting for your share.'
  32         return Error
  33
  34 class EncodeUnicode(Filter):
  35     def filter(self, val, **kw):
  36         """Encode Unicode strings, by default in UTF-8"""
  37
  38         encoding = kw.get('encoding', 'utf8')
  39
  40         if type(val) == str:
  41             try:
  42                 val = val.decode('utf8')
  43             except:
  44                 if sys.platform == 'darwin':
  45                     val = val.decode('macroman')
  46                 else:
  47                     val = val.decode('iso8859-1')
  48         elif type(val) != unicode:
  49             val = str(val)
  50         return val.encode(encoding)
  51
  52 class Plugin(object):
  53
  54     random_lock = threading.Lock()
  55
  56     CONTENT_TYPE = ''
  57
  58     recurse_cache = LRUCache(5)
  59     dir_cache = LRUCache(10)
  60
  61     def __new__(cls, *args, **kwds):
  62         it = cls.__dict__.get('__it__')
  63         if it is not None:
  64             return it
  65         cls.__it__ = it = object.__new__(cls)
  66         it.init(*args, **kwds)
  67         return it
  68
  69     def init(self):
  70         pass
  71
  72     def send_file(self, handler, path, query):
  73         handler.send_content_file(unicode(path, 'utf-8'))
  74
  75     def get_local_base_path(self, handler, query):
  76         return os.path.normpath(handler.container['path'])
  77
  78     def get_local_path(self, handler, query):
  79
  80         subcname = query['Container'][0]
  81
  82         path = self.get_local_base_path(handler, query)
  83         for folder in subcname.split('/')[1:]:
  84             if folder == '..':
  85                 return False
  86             path = os.path.join(path, folder)
  87         return path
  88
  89     def item_count(self, handler, query, cname, files, last_start=0):
  90         """Return only the desired portion of the list, as specified by
  91            ItemCount, AnchorItem and AnchorOffset. 'files' is either a
  92            list of strings, OR a list of objects with a 'name' attribute.
  93         """
  94         def no_anchor(handler, anchor):
  95             handler.server.logger.warning('Anchor not found: ' + anchor)
  96
  97         totalFiles = len(files)
  98         index = 0
  99
 100         if totalFiles and 'ItemCount' in query:
 101             count = int(query['ItemCount'][0])
 102
 103             if 'AnchorItem' in query:
 104                 bs = '/TiVoConnect?Command=QueryContainer&Container='
 105                 local_base_path = self.get_local_base_path(handler, query)
 106
 107                 anchor = query['AnchorItem'][0]
 108                 if anchor.startswith(bs):
 109                     anchor = anchor.replace(bs, '/', 1)
 110                 anchor = unquote(anchor)
 111                 anchor = anchor.replace(os.path.sep + cname, local_base_path, 1)
 112                 if not '://' in anchor:
 113                     anchor = os.path.normpath(anchor)
 114
 115                 if type(files[0]) == str:
 116                     filenames = files
 117                 else:
 118                     filenames = [x.name for x in files]
 119                 try:
 120                     index = filenames.index(anchor, last_start)
 121                 except ValueError:
 122                     if last_start:
 123                         try:
 124                             index = filenames.index(anchor, 0, last_start)
 125                         except ValueError:
 126                             no_anchor(handler, anchor)
 127                     else:
 128                         no_anchor(handler, anchor) # just use index = 0
 129
 130                 if count > 0:
 131                     index += 1
 132
 133                 if 'AnchorOffset' in query:
 134                     index += int(query['AnchorOffset'][0])
 135
 136             if count < 0:
 137                 index = (index + count) % len(files)
 138                 count = -count
 139             files = files[index:index + count]
 140
 141         return files, totalFiles, index
 142
 143     def get_files(self, handler, query, filterFunction=None, force_alpha=False):
 144
 145         class FileData:
 146             def __init__(self, name, isdir):
 147                 self.name = name
 148                 self.isdir = isdir
 149                 st = os.stat(unicode(name, 'utf-8'))
 150                 self.mdate = st.st_mtime
 151                 self.size = st.st_size
 152
 153         class SortList:
 154             def __init__(self, files):
 155                 self.files = files
 156                 self.unsorted = True
 157                 self.sortby = None
 158                 self.last_start = 0
 159
 160         def build_recursive_list(path, recurse=True):
 161             files = []
 162             path = unicode(path, 'utf-8')
 163             try:
 164                 for f in os.listdir(path):
 165                     if f.startswith('.'):
 166                         continue
 167                     f = os.path.join(path, f)
 168                     isdir = os.path.isdir(f)
 169                     if sys.platform == 'darwin':
 170                         f = unicodedata.normalize('NFC', f)
 171                     f = f.encode('utf-8')
 172                     if recurse and isdir:
 173                         files.extend(build_recursive_list(f))
 174                     else:
 175                        if not filterFunction or filterFunction(f, file_type):
 176                            files.append(FileData(f, isdir))
 177             except:
 178                 pass
 179             return files
 180
 181         subcname = query['Container'][0]
 182         path = self.get_local_path(handler, query)
 183
 184         file_type = query.get('Filter', [''])[0]
 185
 186         recurse = query.get('Recurse', ['No'])[0] == 'Yes'
 187
 188         filelist = []
 189         rc = self.recurse_cache
 190         dc = self.dir_cache
 191         if recurse:
 192             if path in rc and rc.mtime(path) + 300 >= time.time():
 193                 filelist = rc[path]
 194         else:
 195             updated = os.path.getmtime(unicode(path, 'utf-8'))
 196             if path in dc and dc.mtime(path) >= updated:
 197                 filelist = dc[path]
 198             for p in rc:
 199                 if path.startswith(p) and rc.mtime(p) < updated:
 200                     del rc[p]
 201
 202         if not filelist:
 203             filelist = SortList(build_recursive_list(path, recurse))
 204
 205             if recurse:
 206                 rc[path] = filelist
 207             else:
 208                 dc[path] = filelist
 209
 210         def dir_sort(x, y):
 211             if x.isdir == y.isdir:
 212                 return name_sort(x, y)
 213             else:
 214                 return y.isdir - x.isdir
 215
 216         def name_sort(x, y):
 217             return cmp(x.name, y.name)
 218
 219         def date_sort(x, y):
 220             return cmp(y.mdate, x.mdate)
 221
 222         sortby = query.get('SortOrder', ['Normal'])[0]
 223         if filelist.unsorted or filelist.sortby != sortby:
 224             if force_alpha:
 225                 filelist.files.sort(dir_sort)
 226             elif sortby == '!CaptureDate':
 227                 filelist.files.sort(date_sort)
 228             else:
 229                 filelist.files.sort(name_sort)
 230
 231             filelist.sortby = sortby
 232             filelist.unsorted = False
 233
 234         files = filelist.files[:]
 235
 236         # Trim the list
 237         files, total, start = self.item_count(handler, query, handler.cname,
 238                                               files, filelist.last_start)
 239         if len(files) > 1:
 240             filelist.last_start = start
 241         return files, total, start