5 # Permission is hereby granted, free of charge, to any person obtaining a copy
6 # of this software and associated documentation files (the "Software"), to deal
7 # in the Software without restriction, including without limitation the rights
8 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 # copies of the Software, and to permit persons to whom the Software is
10 # furnished to do so, subject to the following conditions:
12 # The above copyright notice and this permission notice shall be included in
13 # all copies or substantial portions of the Software.
15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
34 sys.stderr.write('Failed to find a suitable http downloader\n')
37 class InvalidICS(Exception): pass
38 class notJoined(Exception): pass
40 # RFC5545 and RFC5546 iCalendar registries contain upper case letters
41 # and dashes only and are separated from the value by a colon (:)
42 itemstart = re.compile('^[A-Z\-]+:.*')
43 def lineJoiner(oldcal):
44 '''Unfolds a calendar so that items can be parsed'''
50 line = line.rstrip('\r\n')
52 # Reassemble broken Lines
55 else: cal[-1] += '\\n'
57 if not cal: raise InvalidICS, 'First line of ICS must be element'
58 line = line[1:len(line)]
60 elif not itemstart.match(line):
61 if not cal: raise InvalidICS, 'First line of ICS must be element'
62 cal[-1] += '\\n' + line
64 if cal: cal[-1] += '\r\n'
71 def lineSplitter(oldcal, length=75):
72 '''Folds content lines to a specified length, returns a list'''
78 # Line & line ending line ending fit inside length, do nothing
79 if len(line.rstrip()) <= length:
82 brokenline = [line[0:length] + '\r\n']
84 while ll < len(line.rstrip('\r\n')) + 1:
85 brokenline.append(' ' + line[ll:sl+ll].rstrip('\r\n') + '\r\n')