def token_retrieve(request):
if 'error' in request.GET:
return HttpResponseServerError(
'Failed to create Canvas API oauth token: ' \
+ request.GET['error'])
oauth_code = request.GET.get('code')
oauth_state = request.GET.get('state')
if oauth_state != request.session['CANVAS_API_OAUTH_INITIAL_STATE']:
return HttpResponseBadRequest("Oauth state mismatch")
client_cred = get_client_credentials(request)
# this needs to be the same url as in the token_init view because
# canvas uses it for validation purposes; not actually used for redirection
redirect_uri = absolute_uri(request, 'token_retrieve')
token_retrieve_params = {
'client_id': client_cred['client_id'],
'client_secret': client_cred['client_secret'],
'code': oauth_code,
'redirect_uri': redirect_uri,
}
token_retrieve_uri = canvas_uri(request, '/login/oauth2/token')
try:
token = token_request(token_retrieve_uri, token_retrieve_params)
except Exception, e:
return HttpResponseServerError("Failed to fetch generate token: " \
+ str(e))
def get_facebook_access_token(request):
if 'error' in request.GET:
log_exception(
'Error in get_facebook_access_token',
extra={'error': request.GET.get('error'),
'error_reason': request.GET.get('error_reason'),
'error_description': request.GET.get('error_description')})
raise FacebookError(request.GET['error'])
if not 'code' in request.GET:
raise BadRequestError
code = request.GET.get('code', '')
if not code:
raise Exception
params = {
'client_id': settings.FACEBOOK_APP_ID,
'client_secret': settings.FACEBOOK_SECRET_KEY,
'redirect_uri': absolute_uri(request.path, request),
'code': code,
}
response = urlopen('https://graph.facebook.com/oauth/access_token?'
+ urlencode(params)).read()
return parse_qs(response)['access_token'][-1]
def request_facebook_permissions(request, permissions, redirect_url):
params = {
'client_id': settings.FACEBOOK_APP_ID,
'redirect_uri': absolute_uri(redirect_url, request),
'scope': ','.join(permissions),
}
return HttpResponseRedirect('https://graph.facebook.com/oauth/authorize?' +
urlencode(params))
def get_content(state):
path = state.data_dir + time.strftime('%Y%m%d-%H:%M:%S',
time.gmtime(time.time()))
dom = lxml.html.fromstring(state.response.text)
childs = dom.xpath(utils.xpath_for_class(state.element) + '//h3/a/@href')
if len(childs) > 0:
os.makedirs(path)
logging.info("Saving page content in %s/", path)
utils.save_page_in(path, "main.html", state.response.text)
absolute_uris = [utils.absolute_uri(state.uri, u) for u in childs]
return [(process_pages, state, path, absolute_uris)]
return [(sleep, state)]
def token_init(request):
# generate & store a random 'state' value that can be validated in the next step
state = str(uuid4())
request.session['CANVAS_API_OAUTH_INITIAL_STATE'] = state
redirect_uri = absolute_uri(request, 'token_retrieve')
client_cred = get_client_credentials(request)
# params to generate the user's api token
token_gen_params = {
'client_id': client_cred['client_id'],
'response_type': 'code',
'redirect_uri': redirect_uri,
'state': state,
}
# redirect to canvas to initiate the token creation
token_gen_uri = canvas_uri(request, '/login/oauth2/auth', token_gen_params)
return redirect(token_gen_uri)
def oauth_client(app, *args):
if not OAUTH_APP_SETTINGS['oauth_callback']:
OAUTH_APP_SETTINGS['oauth_callback'] = utils.absolute_uri('twitter', action='callback')
return oauth.OAuthClient(app, OAUTH_APP_SETTINGS, *args)
def oauth_client(app, *args):
if not OAUTH_APP_SETTINGS['oauth_callback']:
OAUTH_APP_SETTINGS['oauth_callback'] = utils.absolute_uri(
'twitter', action='callback')
return oauth.OAuthClient(app, OAUTH_APP_SETTINGS, *args)
