src/rtv_utils.py

   1 #!/usr/bin/python
   2
   3 import os, select, re, datetime, time, xml.parsers.expat, popen2
   4 import rtv_saxhandler
   5
   6 SECS_IN_DAY = 60*60*24
   7 MINS_IN_DAY = 60*24
   8
   9 def ensure_dir_exists( dr ):
  10         if os.path.isfile( dr ):
  11                 raise Exception( ( "Can't create config directory '%s' "
  12                         + "- there is a file already there!" ) % dr )
  13
  14         if not os.path.isdir( dr ):
  15                 os.makedirs( dr )
  16
  17 ALLOWED_CHARS_RE = re.compile( "[0-9a-zA-Z_-]" )
  18 def prepare_filename( fn ):
  19         ret = ""
  20         for ch in fn[:20]:
  21                 if ALLOWED_CHARS_RE.match( ch ):
  22                         ret += ch
  23                 else:
  24                         ret += "_"
  25         return ret
  26
  27 def run_command( cmd_array ):
  28
  29         pop = popen2.Popen4( " ".join( cmd_array ) )
  30
  31         ret_val = pop.wait()
  32
  33         #print "Return value = '%s'" % ret_val
  34
  35         return ret_val == 0
  36
  37 def run_command_write_output( cmd_array, output_filename ):
  38
  39         cmd = " ".join( cmd_array )
  40         cmd += " > "
  41         cmd += output_filename
  42
  43         #print "Running command " + cmd
  44
  45         ret_val = os.system( cmd )
  46
  47         #print "Return value = '%s'" % ret_val
  48
  49         return ret_val == 0
  50
  51 def run_command_feed_input( cmd_array, input_string ):
  52
  53         #print "Running command " + str( cmd_array )
  54         (i, oe) = os.popen4( cmd_array )
  55
  56         #print "Feeding input " + input_string
  57
  58         i.write( input_string )
  59         i.close()
  60
  61         ret = []
  62         for ln in oe.readlines():
  63                 ret.append( ln )
  64                 #print "Output: " + ln,
  65
  66         return ret
  67
  68 def parse_xmltv_files( config, sax_callback ):
  69
  70         parser = xml.parsers.expat.ParserCreate()
  71         handler = rtv_saxhandler.SaxHandler( sax_callback )
  72         parser.StartElementHandler = handler.startElement
  73         parser.EndElementHandler = handler.endElement
  74         parser.CharacterDataHandler = handler.characters
  75
  76         done = False
  77         for fn in os.listdir( config.xmltv_files_dir ):
  78                 if fn[-6:] == ".xmltv":
  79                         done = True
  80
  81                         full_fn = os.path.join( config.xmltv_files_dir, fn )
  82                         #print "Parsing '%s'" % full_fn
  83                         fl = file( full_fn, "r" )
  84                         parser.ParseFile( fl )
  85                         fl.close()
  86
  87         if not done:
  88                 print ( "Unable to parse xmltv listings - no files found"
  89                         + " in directory '%s'." % config.xmltv_files_dir )
  90
  91
  92 def parse_datetime( stringdatetime, format ):
  93         return datetime.datetime( *time.strptime( stringdatetime, format )[0:6] )
  94
  95 def read_file_into_str( filename ):
  96         fl = file( filename, "r" )
  97         ans = fl.read()
  98         fl.close()
  99
 100         return ans
 101
 102 def encode_text( text ):
 103         return unicode( text ).encode( 'ascii', 'ignore' )
 104