Welcome, new user, %s
" % name minifb.call("facebook.profile.setFBML", _FbApiKey, _FbSecret, session_key=session_key, call_id=True, uid=uid, markup=fbml) """ # Copyright (c) 2007 Peter Shinners # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. __all__ = ["FacebookError", "call", "validate", "FacebookSecret"] import md5 import time import cgi import urllib from google.appengine.api import urlfetch import logging # Globals _fbUrl = "http://api.facebook.com/restserver.php" _fbApi = "1.0" class FacebookError(StandardError): """Error that happens during a facebook call.""" def __init__(self, error_code, error_msg): self.error_code = error_code self.error_msg = error_msg StandardError.__init__(self, "Facebook Error %s: %s" % (self.error_code, self.error_msg)) def call(method, api_key, secret, **kwargs): """Call facebook server with a method request. Most keyword arguments are passed directly to the server with a few exceptions. The 'sig' value will always be computed automatically. The 'v' version will be supplied automatically if needed. The 'call_id' defaults to True, which will generate a valid number. Otherwise it should be a valid number or False to disable. The default return is a parsed simplejson object. Unless the 'format' and/or 'callback' arguments are given, in which case the raw text of the reply is returned. The string will always be returned, even during errors. If an error occurs, a FacebookError exception will be raised with the proper code and message. The secret argument can be any string, but should be an instance of FacebookSecret to hide value from simple introspection. """ # Finalize kwargs call_id = kwargs.get("call_id", True) if call_id is True: kwargs["call_id"] = int(time.time() * 1000) elif call_id is False: del kwargs["call_id"] customFormat = "format" in kwargs or "callback" in kwargs kwargs.setdefault("format", "JSON") kwargs.setdefault("v", _fbApi) kwargs.setdefault("api_key", api_key) kwargs.setdefault("method", method) # Hash with secret key md5hash = md5.new() for key, value in sorted(kwargs.items()): md5hash.update(key) md5hash.update("=") md5hash.update(str(value)) md5hash.update(FacebookSecret.value(secret)) del secret # No longer using secret, clear it from locals kwargs["sig"] = md5hash.hexdigest() logging.info("Calling facebook: method = " + method) # Call website, send arguments as POST args = urllib.urlencode(kwargs) # should pass doseq=True? logging.info("args = " + args) response = urlfetch.fetch(_fbUrl, payload=args, method=urlfetch.POST, headers = {'Content-type': 'application/x-www-form-urlencoded'}) # Handle response if customFormat: return response import simplejson data = simplejson.loads(response.content) try: raise FacebookError(data["error_code"], data["error_msg"]) except (LookupError, TypeError): pass return data def validate(secret, request): """Validate the arguments received from facebook. This is usually sent for the iframe in Facebook's canvas. It is not necessary to use this on the auth_token and uid passed to callbacks like post-add and post-remove. request is a google webapp Request object If the data is invalid or not signed properly, and empty dictionary is returned. The secret argument can be any string, but should be an instance of FacebookSecret to hide value from simple introspection. """ signature = request.get("fb_sig") if not signature: return [] argument_names = request.arguments() # Hash data with secret key prefix = "fb_sig_" preflen = len(prefix) unsigned = {} signed = [] for i in argument_names: if i.startswith(prefix): signed.append((i[preflen:], request.get(i))) else: unsigned[i] = request.get(i) signed.sort() md5hash = md5.new() for key, value in signed: md5hash.update(key) md5hash.update("=") md5hash.update(value) md5hash.update(FacebookSecret.value(secret)) del secret # No longer using secret, clear it from locals if md5hash.hexdigest() != signature: # Hash is incorrect, return unsigned fields return unsigned unsigned.update(signed) return unsigned class FacebookSecret(object): """Simple container that stores a secret value. Will prevent fancy traceback tools like cgitb and django from showing the secret key in error reports. The static value method will convert this or any object to a string. """ def __init__(self, value): b = buffer(value) del value self.__call__ = lambda: str(b) # Odd to mask this as a builtin. It doesn't fool vars(), but # class instances are still not callable, TypeError. def __str__(self): return "