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exampleapp.py
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exampleapp.py
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import base64
import os
import os.path
import simplejson as json
import urllib
import urllib2
from flask import Flask, request, redirect, render_template
FBAPI_APP_ID = os.environ.get('FACEBOOK_APP_ID')
def oauth_login_url(preserve_path=True, next_url=None):
fb_login_uri = ("https://www.facebook.com/dialog/oauth"
"?client_id=%s&redirect_uri=%s" %
(app.config['FBAPI_APP_ID'], get_home()))
if app.config['FBAPI_SCOPE']:
fb_login_uri += "&scope=%s" % ",".join(app.config['FBAPI_SCOPE'])
return fb_login_uri
def simple_dict_serialisation(params):
return "&".join(map(lambda k: "%s=%s" % (k, params[k]), params.keys()))
def base64_url_encode(data):
return base64.urlsafe_b64encode(data).rstrip('=')
def fbapi_get_string(path, domain=u'graph', params=None, access_token=None,
encode_func=urllib.urlencode):
"""Make an API call"""
if not params:
params = {}
params[u'method'] = u'GET'
if access_token:
params[u'access_token'] = access_token
for k, v in params.iteritems():
if hasattr(v, 'encode'):
params[k] = v.encode('utf-8')
url = u'https://' + domain + u'.facebook.com' + path
params_encoded = encode_func(params)
url = url + params_encoded
result = urllib2.urlopen(url).read()
return result
def fbapi_auth(code):
params = {'client_id': app.config['FBAPI_APP_ID'],
'redirect_uri': get_home(),
'client_secret': app.config['FBAPI_APP_SECRET'],
'code': code}
result = fbapi_get_string(path=u"/oauth/access_token?", params=params,
encode_func=simple_dict_serialisation)
pairs = result.split("&", 1)
result_dict = {}
for pair in pairs:
(key, value) = pair.split("=")
result_dict[key] = value
return (result_dict["access_token"], result_dict["expires"])
def fbapi_get_application_access_token(id):
token = fbapi_get_string(
path=u"/oauth/access_token",
params=dict(grant_type=u'client_credentials', client_id=id,
client_secret=app.config['FB_APP_SECRET']),
domain=u'graph')
token = token.split('=')[-1]
if not str(id) in token:
print 'Token mismatch: %s not in %s' % (id, token)
return token
def fql(fql, token, args=None):
if not args:
args = {}
args["query"], args["format"], args["access_token"] = fql, "json", token
return json.loads(
urllib2.urlopen("https://api.facebook.com/method/fql.query?" +
urllib.urlencode(args)).read())
def fb_call(call, args=None):
return json.loads(urllib2.urlopen("https://graph.facebook.com/" + call +
'?' + urllib.urlencode(args)).read())
app = Flask(__name__)
app.config.from_object(__name__)
app.config.from_object('conf.Config')
def get_home():
return 'https://' + request.host + '/'
@app.route('/', methods=['GET', 'POST'])
def index():
print get_home()
if request.args.get('code', None):
access_token = fbapi_auth(request.args.get('code'))[0]
me = fb_call('me', args={'access_token': access_token})
app = fb_call(FBAPI_APP_ID, args={'access_token': access_token})
likes = fb_call('me/likes',
args={'access_token': access_token, 'limit': 4})
friends = fb_call('me/friends',
args={'access_token': access_token, 'limit': 4})
photos = fb_call('me/photos',
args={'access_token': access_token, 'limit': 16})
redir = get_home() + 'close/'
POST_TO_WALL = ("https://www.facebook.com/dialog/feed?redirect_uri=%s&"
"display=popup&app_id=%s" % (redir, FBAPI_APP_ID))
app_friends = fql(
"SELECT uid, name, is_app_user, pic_square "
"FROM user "
"WHERE uid IN (SELECT uid2 FROM friend WHERE uid1 = me()) AND "
" is_app_user = 1", access_token)
SEND_TO = ('https://www.facebook.com/dialog/send?'
'redirect_uri=%s&display=popup&app_id=%s&link=%s'
% (redir, FBAPI_APP_ID, get_home()))
return render_template(
'index.html', appId=FBAPI_APP_ID, token=access_token, likes=likes,
friends=friends, photos=photos, app_friends=app_friends, app=app,
me=me, POST_TO_WALL=POST_TO_WALL, SEND_TO=SEND_TO)
else:
print oauth_login_url(next_url=get_home())
return redirect(oauth_login_url(next_url=get_home()))
@app.route('/close/', methods=['GET', 'POST'])
def close():
return render_template('close.html')
if __name__ == '__main__':
port = int(os.environ.get("PORT", 5000))
if app.config.get('FBAPI_APP_ID') and app.config.get('FBAPI_APP_SECRET'):
app.run(host='0.0.0.0', port=port)
else:
print 'Cannot start application without Facebook App Id and Secret set'