import sys
import urlparse
import os
+import vobject
from cgi import parse_header
-class InvalidICS(Exception): pass
-class IncompleteICS(InvalidICS): pass
-
-def lineJoiner(oldcal, encoding='utf-8'):
- '''Takes a string containing a calendar and returns an array of its lines'''
- try:
- oldcal = unicode(oldcal, encoding)
- oldcal = oldcal.replace('\r\n ', '').replace('\r\n\t','')
- except UnicodeDecodeError:
- # This is probably a file with badly folded lines
- oldcal = oldcal.replace('\r\n ', '').replace('\r\n\t','')
- try: oldcal = unicode(oldcal, encoding)
- except UnicodeDecodeError:
- sys.stderr.write('Malformed File')
- raise
-
- if not oldcal[0:15] == 'BEGIN:VCALENDAR':
- raise InvalidICS, "Does not appear to be a valid ICS file"
-
- if not 'END:VCALENDAR' in oldcal[-15:-1]:
- raise IncompleteICS, "File appears to be incomplete"
-
- if list(oldcal) == oldcal:
- oldcal = '\r\n'.join(oldcal)
-
- return oldcal.split('\r\n')
-
-
-def lineFolder(oldcal, length=75):
- '''Folds content lines to a specified length, returns a list'''
-
- if length > 75:
- sys.stderr.write('WARN: lines > 75 octets are not RFC compliant\n')
-
- cal = []
- sl = length - 1
-
- for uline in oldcal:
- line = uline.encode('utf-8')
-
- # Line fits inside length, do nothing
- if len(line) <= length:
- cal.append(line)
-
- else:
- ll = length
- foldedline = []
- while uline:
- ufold = unicode(line[0:ll], 'utf-8', 'ignore')
- fold = ufold.encode('utf-8')
- uline = uline.replace(ufold,u'',1)
- line = uline.encode('utf-8')
- foldedline.append(fold)
-
- # Subsequent lines are shorter as they include a space
- ll = length - 1
- cal.append('\r\n '.join(foldedline))
-
- return cal
-
-
-def splitFields(cal):
- '''Takes a list of lines in a calendar file and returns a list of tuples
- as (key, value) pairs'''
-
- ical = []
-
- # Check that we got 2 items on every line
- for line in [tuple(x.split(':',1)) for x in cal]:
- if not len(line) == 2 and line[0]:
- raise InvalidICS, 'Unusual content line: %s'%line
- elif line[0]:
- ical.append(line)
-
- return ical
-
-
-def joinFields(ical):
- '''Takes a list of tuples that make up a calendar file and returns it to a
- list of lines'''
-
- return [':'.join(x) for x in ical]
-
-
def getContent(url='',stdin=False):
'''Generic content retriever, DO NOT use this function in a CGI script as
it can read from the local disk (which you probably don't want it to).
return rules
-def applyRules(ical, rules=[], verbose=False):
+def applyRules(cal, rules=[], verbose=False):
'Runs a series of rules on the lines in ical and mangles its output'
for rule in rules:
- output = []
- if rule.__doc__ and verbose:
- print(rule.__doc__)
- for line in ical:
- try:
- out = rule(line[0],line[1])
- except TypeError, e:
- output.append(line)
- print(e)
- continue
-
- # Drop lines that are boolean False
- if not out and not out == None: continue
-
- # If the rule did something and is a tuple or a list we'll accept it
- # otherwise, pay no attention to the man behind the curtain
- try:
- if tuple(out) == out or list(out) == out and len(out) == 2:
- output.append(tuple(out))
- else:
- output.append(line)
- except TypeError, e:
- output.append(line)
-
- ical = output
-
- return ical
+ cal = rule(cal)
+ return cal
def writeOutput(cal, outfile=''):
'''Takes a list of lines and outputs to the specified file'''
sys.stderr.write('%s\n'%e)
sys.exit(1)
- if cal[-1]: cal.append('')
-
- out.write('\r\n'.join(cal))
+ cal.serialize(out)
if not out == sys.stdout:
out.close()
-
-def vobjectRules(ics):
- '''Applies rules to the ICS file before we have our way with it'''
-
- try:
- import vobjectRules
- except ImportError:
- sys.stderr.write('Vobject rules file could not be imported\n')
- return ics
-
- for rule in vobjectRules.runRules:
- ics = rule(ics)
-
- return ics
-
-
if __name__ == '__main__':
from optparse import OptionParser
# If the user passed us a 'stdin' argument, we'll go with that,
parser.add_option('-m','--encoding', dest='encoding', default='',
help='Specify a different character encoding'
'(ignored if the remote server also specifies one)')
- parser.add_option('-r','--vobject-rules',
- action='store_true', dest='vobject',
- help='Run rules written for vobject stored in vobjectRules.py')
(options, args) = parser.parse_args()
(content, encoding) = getContent(url, options.stdin)
encoding = encoding or options.encoding or 'utf-8'
- if options.vobject: content = vobjectRules(content)
- cal = lineJoiner(content, encoding)
- ical = applyRules(splitFields(cal), generateRules(), options.verbose)
- output = lineFolder(joinFields(ical))
- writeOutput(output, options.outfile)
+
+ cal = vobject.readOne(unicode(content, encoding))
+ cal = applyRules(cal, generateRules(), options.verbose)
+
+ writeOutput(cal, options.outfile)
git.ucc.asn.au / frenchie / icalparse.git / blobdiff
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