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
27 from optparse import OptionParser
29 class InvalidICS(Exception): pass
30 class notJoined(Exception): pass
32 # RFC5545 and RFC5546 iCalendar registries contain upper case letters
33 # and dashes only and are separated from the value by a colon (:)
34 icalEntry = re.compile('^[A-Z\-]+:.*')
36 def lineJoiner(oldcal):
37 '''Unfolds a calendar so that items can be parsed'''
43 line = line.rstrip('\r\n')
45 # Reassemble broken Lines
48 else: cal[-1] += '\\n'
50 if not cal: raise InvalidICS, 'First line of ICS must be element'
51 line = line[1:len(line)]
53 elif not icalEntry.match(line):
54 if not cal: raise InvalidICS, 'First line of ICS must be element'
55 cal[-1] += '\\n' + line
57 if cal: cal[-1] += '\r\n'
64 def lineSplitter(oldcal, length=75):
65 '''Folds content lines to a specified length, returns a list'''
71 # Line & line ending line ending fit inside length, do nothing
72 if len(line.rstrip()) <= length:
75 brokenline = [line[0:length] + '\r\n']
77 while ll < len(line.rstrip('\r\n')) + 1:
78 brokenline.append(' ' + line[ll:sl+ll].rstrip('\r\n') + '\r\n')
84 if __name__ == '__main__':
85 # If the user passed us a 'stdin' argument, we'll go with that,
86 # otherwise we'll try for a url opener
88 parser = OptionParser('usage: %prog [options] url')
89 parser.add_option('-s', '--stdin', action='store_true', dest='stdin',
90 default=False, help='Take a calendar from standard input')
91 parser.add_option('-o', '--output', dest='outfile', default='',
92 help='Specify output file (defaults to standard output)')
94 (options, args) = parser.parse_args()
96 if not args and not options.stdin:
102 # Work out what url parsers we're going to need based on what the user
103 # gave us on the command line - we do like files after all
104 parsedURL = urlparse.urlparse(url)
105 http = 'http' in parsedURL[0]
107 if not parsedURL[0]: u = False
110 if not options.stdin and http:
116 # Try and play nice with HTTP servers unless something goes wrong. We don't
117 # really care about this cache so it can be somewhere volatile
119 if 'httplib2' in sys.modules:
120 try: h = httplib2.Http('.httplib2-cache')
121 except OSError: h = httplib2.Http()
123 if not options.stdin and (not http or not 'httplib2' in sys.modules):
127 content = u and (h and h.request(url)[1] or urllib2.urlopen(url).read())
128 except (ValueError, urllib2.URLError), e:
129 sys.stderr.write('%s\n'%e)
133 try: content = open(os.path.abspath(url),'r').read()
134 except (IOError, OSError), e:
135 sys.stderr.write('%s\n'%e)
138 # RFC5545 and RFC5546 Calendars should be generated UTF-8 and we need to
139 # be able to read ANSI as well. This should take care of us.
140 content = unicode(content, encoding='utf-8')