#!/usr/bin/python
#
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
-import sys
+import sys, os
import urlparse
-import os
import vobject
from cgi import parse_header
-
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 (content, encoding)
-def generateRules():
+def generateRules(ruleConfig):
'''Attempts to load a series of rules into a list'''
try:
import parserrules
except ImportError:
return []
+ for conf in ruleConfig:
+ parserrules.ruleConfig[conf] = ruleConfig[conf]
+
rules = [getattr(parserrules, rule) for rule in dir(parserrules) if callable(getattr(parserrules, rule))]
return rules
return cal
+
def writeOutput(cal, outfile=''):
'''Takes a list of lines and outputs to the specified file'''
if not out == sys.stdout:
out.close()
-if __name__ == '__main__':
+
+def runLocal():
+ '''Main run function if this script is called locally'''
+
from optparse import OptionParser
- # If the user passed us a 'stdin' argument, we'll go with that,
- # otherwise we'll try for a url opener
parser = OptionParser('usage: %prog [options] url')
parser.add_option('-s', '--stdin', action='store_true', dest='stdin',
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('-t','--timezone', dest='timezone', default='',
+ help='Specify a timezone to use if the remote calendar doesn\'t set it properly')
(options, args) = parser.parse_args()
+ ruleConfig["defaultTZ"] = options.timezone or ruleConfig["defaultTZ"]
+ # If the user passed us a 'stdin' argument, we'll go with that,
+ # otherwise we'll try for a url opener
if not args and not options.stdin:
parser.print_usage()
sys.exit(0)
encoding = encoding or options.encoding or 'utf-8'
cal = vobject.readOne(unicode(content, encoding))
- cal = applyRules(cal, generateRules(), options.verbose)
+ cal = applyRules(cal, generateRules(ruleConfig), options.verbose)
writeOutput(cal, options.outfile)
+
+
+def exitQuiet(exitstate=0):
+ '''When called as a CGI script, exit quietly if theres any errors'''
+ print('Content-Type: text/html\n')
+ sys.exit(exitstate)
+
+
+def runCGI():
+ '''Main run function if this script is called as a CGI script
+ to process facebook ical files'''
+ import cgi
+ import re
+ import cgitb; cgitb.enable()
+
+ ruleConfig["facebook"] = True
+
+ form = cgi.FieldStorage()
+ if "uid" not in form or "key" not in form:
+ print('Content-Type: text/calendar\n')
+ sys.exit(0)
+ try:
+ # UID should be numeric, if it's not we have someone playing games
+ uid = int(form['uid'].value)
+ except:
+ exitQuiet()
+
+ # The user's key will be a 16 character string
+ key = form['key'].value
+ re.search('[&?]+', key) and exitQuiet()
+ len(key) == 16 or exitQuiet()
+
+ # Historically facebook has been notoriously bad at setting timzeones
+ # in their stuff so this should be a user setting. If it is set in
+ # their calendar it'll be used otherwise if the user feeds crap or
+ # nothing just assume they want Australia/Perth
+ tz = ""
+ if "tz" in form:
+ from pytz import timezone
+ try:
+ timezone(form['tz'].value)
+ tz = form['tz'].value
+ except: pass
+
+ ruleConfig["defaultTZ"] = tz or ruleConfig["defaultTZ"]
+
+ # Okay, we're happy that the input is sane, lets serve up some data
+ url = 'http://www.facebook.com/ical/u.php?uid=%d&key=%s'%(uid,key)
+ (content, encoding) = getHTTPContent(url)
+
+ cal = vobject.readOne(unicode(content, encoding))
+ cal = applyRules(cal, generateRules(ruleConfig), False)
+
+ print('Content-Type: text/calendar; charset=%s\n'%encoding)
+ writeOutput(cal)
+
+
+if __name__ == '__main__':
+ # Ensure the rules process using the desired timezone
+ ruleConfig = {}
+ ruleConfig["defaultTZ"] = 'Australia/Perth'
+
+ # Detect if this script has been called by CGI and proceed accordingly
+ if 'REQUEST_METHOD' in os.environ:
+ runCGI()
+ else:
+ runLocal()