import sys
import urlparse
import os
+from cgi import parse_header
class InvalidICS(Exception): pass
class IncompleteICS(InvalidICS): pass
-def lineJoiner(oldcal):
+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 list(oldcal) == oldcal:
oldcal = '\r\n'.join(oldcal)
- oldcal = oldcal.replace('\r\n ', '').replace('\r\n\t','')
- return [unicode(x, 'utf-8') for x in oldcal.strip().split('\r\n')]
+ return oldcal.split('\r\n')
def lineFolder(oldcal, length=75):
ll = length
foldedline = []
while uline:
- # This algorithm prevents slicing multi-byte chars in half
-
- # Convert up to length octets to unicode, dropping any
- # half characters
- ufold = unicode(line[0:75], 'utf-8', 'ignore')
+ ufold = unicode(line[0:ll], 'utf-8', 'ignore')
fold = ufold.encode('utf-8')
-
- # Remove what we've converted from the line
uline = uline.replace(ufold,u'',1)
line = uline.encode('utf-8')
-
- # And add the fold to the list
foldedline.append(fold)
# Subsequent lines are shorter as they include a space
ll = length - 1
-
- # Finally, add the fold 'marker' to the line
cal.append('\r\n '.join(foldedline))
return cal
'''Takes a list of lines in a calendar file and returns a list of tuples
as (key, value) pairs'''
- ical = [tuple(x.split(':',1)) for x in cal]
+ ical = []
# Check that we got 2 items on every line
- for line in ical:
- if not len(line) == 2:
- raise InvalidICS, "Didn't find a content key on: %s"%(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
it can read from the local disk (which you probably don't want it to).
'''
+ encoding = '' # If we don't populate this, the script will assume UTF-8
+
# Special case, if this is a HTTP url, return the data from it using
# the HTTP functions which attempt to play a bit nicer.
parsedURL = urlparse.urlparse(url)
if stdin:
content = sys.stdin.read()
- return content
+ return (content, encoding)
- if not parsedURL[0]:
- try: content = open(os.path.abspath(url),'r').read()
- except (IOError, OSError), e:
- sys.stderr.write('%s\n'%e)
- sys.exit(1)
- return content
+ if not parsedURL[0]: url = 'file://' + os.path.abspath(url)
# If we've survived, use python's generic URL opening library to handle it
import urllib2
try:
res = urllib2.urlopen(url)
content = res.read()
+ ct = res.info().getplist()
res.close()
except (urllib2.URLError, OSError), e:
sys.stderr.write('%s\n'%e)
sys.exit(1)
- return content
+
+ for param in ct:
+ if 'charset' in param:
+ encoding = param.split('=')[1]
+ break
+
+ return (content, encoding)
def getHTTPContent(url='',cache='.httplib2-cache'):
except ImportError:
import urllib2
- if not url: return ''
+ if not url: return ('','')
+
+ if not 'http' in urlparse.urlparse(url)[0]: return ('','')
if 'httplib2' in sys.modules:
try: h = httplib2.Http('.httplib2-cache')
except OSError: h = httplib2.Http()
else: h = False
- try:
- if h: content = h.request(url)[1]
- return content
- except ValueError, e:
- sys.stderr.write('%s\n'%e)
- sys.exit(1)
+ if h:
+ try:
+ req = h.request(url)
+ except ValueError, e:
+ sys.stderr.write('%s\n'%e)
+ sys.exit(1)
- try:
- content = urllib2.urlopen(url).read()
- return content
- except (urllib2.URLError, OSError), e:
- sys.stderr.write('%s\n'%e)
- sys.exit(1)
+ resp, content = req
+ if 'content-type' in resp:
+ ct = 'Content-Type: %s'%req[0]['content-type']
+ ct = parse_header(ct)
+ if 'charset' in ct[1]: encoding = ct[1]['charset']
+ else: encoding = ''
+ else:
+ ct = ''
+ encoding = ''
+
+ else:
+ try:
+ req = urllib2.urlopen(url)
+ except urllib2.URLError, e:
+ sys.stderr.write('%s\n'%e)
+ sys.exit(1)
+
+ content = req.read()
+ ct = req.info().getplist()
+ for param in ct:
+ if 'charset' in param:
+ encoding = param.split('=')[1]
+ break
- return ''
+ return (content, encoding)
def generateRules():
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,
default=False, help='Be verbose when rules are being applied')
parser.add_option('-o', '--output', dest='outfile', default='',
help='Specify output file (defaults to standard output)')
+ 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()
else:
url = ''
- content = getContent(url, options.stdin)
- cal = lineJoiner(content)
+ (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)