+
+def splitFields(cal):
+ '''Takes a list of lines in a calendar file and returns a list of key, value pairs'''
+
+ ical = [tuple(x.split(':',1)) for x in cal]
+
+ # 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)
+
+ return 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).
+ '''
+
+ # 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 'http' in parsedURL[0]: return getHTTPContent(url)
+
+ if stdin:
+ content = sys.stdin.read()
+ return content
+
+ 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 we've survived, use python's generic URL opening library to handle it
+ import urllib2
+ try:
+ res = urllib2.urlopen(url)
+ content = res.read()
+ res.close()
+ except (urllib2.URLError, OSError), e:
+ sys.stderr.write('%s\n'%e)
+ sys.exit(1)
+ return content
+
+
+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.'''
+
+ try:
+ import httplib2
+ except ImportError:
+ import urllib2
+
+ if not url: 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)
+
+ try:
+ content = urllib2.urlopen(url).read()
+ return content
+ except (urllib2.URLError, OSError), e:
+ sys.stderr.write('%s\n'%e)
+ sys.exit(1)
+
+ return ''
+
+
+def generateRules():
+ '''Attempts to load a series of rules into a list'''
+ try:
+ import parserrules
+ except ImportError:
+ return []
+
+ rules = [getattr(parserrules, rule) for rule in dir(parserrules) if callable(getattr(parserrules, rule))]
+ return rules
+
+