class InvalidICS(Exception): pass
-class notJoined(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 oldcal.strip().split('\r\n')
+ return oldcal.split('\r\n')
def lineFolder(oldcal, length=75):
cal = []
sl = length - 1
- for line in oldcal:
+ for uline in oldcal:
+ line = uline.encode('utf-8')
+
# Line fits inside length, do nothing
- if len(line.rstrip()) <= length:
+ if len(line) <= length:
cal.append(line)
+
else:
- brokenline = [line[0:length]]
ll = length
- while ll < len(line) + 1:
- brokenline.append(line[ll:sl+ll])
- ll += sl
- brokenline = '\r\n '.join(brokenline)
- cal.append(brokenline)
+ 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 key, value pairs'''
+ '''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
def joinFields(ical):
- '''Takes a list of tuples that make up a calendar file and returns a list of lines'''
+ '''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]
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
+ return (content, encoding)
# If we've survived, use python's generic URL opening library to handle it
import urllib2
except (urllib2.URLError, OSError), e:
sys.stderr.write('%s\n'%e)
sys.exit(1)
- return content
+ return (content, encoding)
def getHTTPContent(url='',cache='.httplib2-cache'):
'''This function attempts to play nice when retrieving content from HTTP
- services. It's what you should use in a CGI script. It will (by default)
- slurp the first 20 bytes of the file and check that we are indeed looking
- at an ICS file before going for broke.'''
+ services. It's what you should use in a CGI script.'''
try:
import httplib2
if not url: return ''
+ encoding = '' # If we don't populate this, the script will assume UTF-8
+
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
+ if h:
+ req = h.request(url)
+ content = req[1]
+ if 'content-type' in req[0]:
+ for ct in req[0]['content-type'].split(';'):
+ ct = ct.lower()
+ if 'charset' in ct:
+ encoding = ct.split('=')[1].strip()
+ return (content, encoding)
except ValueError, e:
sys.stderr.write('%s\n'%e)
sys.exit(1)
try:
content = urllib2.urlopen(url).read()
- return content
+ return (content, encoding)
except (urllib2.URLError, OSError), e:
sys.stderr.write('%s\n'%e)
sys.exit(1)
- return ''
+ return ('', '')
def generateRules():
return ical
+def writeOutput(cal, outfile=''):
+ '''Takes a list of lines and outputs to the specified file'''
+
+ if not cal:
+ sys.stderr.write('Refusing to write out an empty file')
+ sys.exit(0)
+
+ if not outfile:
+ out = sys.stdout
+ else:
+ try:
+ out = open(outfile, 'w')
+ except (IOError, OSError), e:
+ sys.stderr.write('%s\n'%e)
+ sys.exit(1)
+
+ if cal[-1]: cal.append('')
+
+ out.write('\r\n'.join(cal))
+
+ if not out == sys.stdout:
+ out.close()
+
if __name__ == '__main__':
from optparse import OptionParser
parser = OptionParser('usage: %prog [options] url')
parser.add_option('-s', '--stdin', action='store_true', dest='stdin',
default=False, help='Take a calendar from standard input')
+ parser.add_option('-v', '--verbose', action='store_true', dest='verbose',
+ 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)')
(options, args) = parser.parse_args()
else:
url = ''
- content = getContent(url, options.stdin)
- cal = lineJoiner(content)
- ical = applyRules(splitFields(cal), generateRules())
+ (content, encoding) = getContent(url, options.stdin)
+ encoding = encoding or options.encoding or 'utf-8'
+ cal = lineJoiner(content, encoding)
+ ical = applyRules(splitFields(cal), generateRules(), options.verbose)
output = lineFolder(joinFields(ical))
- print output
+ writeOutput(output, options.outfile)
git.ucc.asn.au / frenchie / icalparse.git / blobdiff
UCC git Repository :: git.ucc.asn.au