X-Git-Url: https://git.ucc.asn.au/?p=frenchie%2Ficalparse.git;a=blobdiff_plain;f=icalparse.py;h=95d52089ba166c7ae1fb88dd24454af2c3ade12c;hp=3907da75547cd90c2ad19a2f4f0865423bcf408d;hb=HEAD;hpb=257bf962578c430062608cb1e10248ec854423db diff --git a/icalparse.py b/icalparse.py index 3907da7..59e409b 100755 --- a/icalparse.py +++ b/icalparse.py @@ -1,6 +1,6 @@ -#!/usr/bin/python +#!/usr/bin/python3 # -# Copyright (c) 2011 James French +# Copyright (c) 2013 James French # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal @@ -20,13 +20,11 @@ # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. -import sys -import urlparse -import os +import sys, os +from urllib import (request, error, parse) 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). @@ -36,7 +34,7 @@ def getContent(url='',stdin=False): # 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) + parsedURL = parse.urlparse(url) if 'http' in parsedURL[0]: return getHTTPContent(url) if stdin: @@ -46,13 +44,12 @@ def getContent(url='',stdin=False): 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) + res = request.urlopen(url) content = res.read() ct = res.info().getplist() res.close() - except (urllib2.URLError, OSError), e: + except (error.URLError, OSError) as e: sys.stderr.write('%s\n'%e) sys.exit(1) @@ -64,28 +61,28 @@ def getContent(url='',stdin=False): return (content, encoding) -def getHTTPContent(url='',cache='.httplib2-cache'): +def getHTTPContent(url=''): '''This function attempts to play nice when retrieving content from HTTP services. It's what you should use in a CGI script.''' try: import httplib2 except ImportError: - import urllib2 + pass if not url: return ('','') - if not 'http' in urlparse.urlparse(url)[0]: return ('','') + if not 'http' in parse.urlparse(url)[0]: return ('','') if 'httplib2' in sys.modules: - try: h = httplib2.Http('.httplib2-cache') + try: h = httplib2.Http() except OSError: h = httplib2.Http() else: h = False if h: try: req = h.request(url) - except ValueError, e: + except ValueError as e: sys.stderr.write('%s\n'%e) sys.exit(1) @@ -101,8 +98,8 @@ def getHTTPContent(url='',cache='.httplib2-cache'): else: try: - req = urllib2.urlopen(url) - except urllib2.URLError, e: + req = request.urlopen(url) + except error.URLError as e: sys.stderr.write('%s\n'%e) sys.exit(1) @@ -127,6 +124,7 @@ def generateRules(ruleConfig): parserrules.ruleConfig[conf] = ruleConfig[conf] rules = [getattr(parserrules, rule) for rule in dir(parserrules) if callable(getattr(parserrules, rule))] + return rules @@ -138,6 +136,7 @@ def applyRules(cal, rules=[], verbose=False): return cal + def writeOutput(cal, outfile=''): '''Takes a list of lines and outputs to the specified file''' @@ -150,7 +149,7 @@ def writeOutput(cal, outfile=''): else: try: out = open(outfile, 'w') - except (IOError, OSError), e: + except (IOError, OSError) as e: sys.stderr.write('%s\n'%e) sys.exit(1) @@ -159,9 +158,10 @@ def writeOutput(cal, outfile=''): if not out == sys.stdout: out.close() -if __name__ == '__main__': - # Only load options parsing if this script was called directly, skip it - # if it's being called as a module. + +def runLocal(): + '''Main run function if this script is called locally''' + from optparse import OptionParser parser = OptionParser('usage: %prog [options] url') @@ -174,14 +174,11 @@ if __name__ == '__main__': 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='Australia/Perth', + 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() - - # Ensure the rules process using the desired timezone - ruleConfig = {} - ruleConfig["defaultTZ"] = options.timezone + 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 @@ -196,7 +193,74 @@ if __name__ == '__main__': (content, encoding) = getContent(url, options.stdin) encoding = encoding or options.encoding or 'utf-8' - cal = vobject.readOne(unicode(content, encoding)) + cal = vobject.readOne(str(content, encoding)) 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 = 'https://www.facebook.com/events/ical/upcoming/?uid=%s&key=%s'%(uid,key) + (content, encoding) = getHTTPContent(url) + + cal = vobject.readOne(str(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()