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from collections import namedtuple
import requests
import pymacaroons
from flask import Flask, render_template, send_from_directory, request, \
url_for, abort, g, redirect, jsonify, session, flash
from flask_login import logout_user, login_user, UserMixin
from fatcat_web import login_manager, api, priv_api, Config
import fatcat_client
def handle_logout():
logout_user()
for k in ('editor', 'api_token'):
if k in session:
session.pop(k)
session.clear()
def handle_token_login(token):
try:
m = pymacaroons.Macaroon.deserialize(token)
except pymacaroons.exceptions.MacaroonDeserializationException:
# TODO: what kind of Exceptions?
app.logger.warn("auth fail: MacaroonDeserializationException")
return abort(400)
# extract editor_id
editor_id = None
for caveat in m.first_party_caveats():
caveat = caveat.caveat_id
if caveat.startswith(b"editor_id = "):
editor_id = caveat[12:].decode('utf-8')
if not editor_id:
app.logger.warn("auth fail: editor_id missing in macaroon")
abort(400)
# fetch editor info
editor = api.get_editor(editor_id)
session.permanent = True
session['api_token'] = token
session['editor'] = editor.to_dict()
login_user(load_user(editor.editor_id))
return redirect("/auth/account")
# This will need to login/signup via fatcatd API, then set token in session
def handle_oauth(remote, token, user_info):
if user_info:
# fetch api login/signup using user_info
# ISS is basically the API url (though more formal in OIDC)
# SUB is the stable internal identifier for the user (not usually the username itself)
# TODO: should have the real sub here
# TODO: would be nicer to pass preferred_username for account creation
iss = remote.OAUTH_CONFIG['api_base_url']
# we reuse 'preferred_username' for account name auto-creation (but
# don't store it otherwise in the backend, at least currently). But i'm
# not sure all loginpass backends will set it
if user_info.get('preferred_username'):
preferred_username = user_info['preferred_username']
else:
preferred_username = user_info['sub']
params = fatcat_client.AuthOidc(remote.name, user_info['sub'], iss, user_info['preferred_username'])
# this call requires admin privs
(resp, http_status, http_headers) = priv_api.auth_oidc_with_http_info(params)
editor = resp.editor
api_token = resp.token
if http_status == 201:
flash("Welcome to Fatcat! An account has been created for you with a temporary username; you may wish to change it under account settings")
flash("You must use the same mechanism ({}) to login in the future".format(remote.name))
else:
flash("Welcome back!")
# write token and username to session
session.permanent = True
session['api_token'] = api_token
session['editor'] = editor.to_dict()
# call login_user(load_user(editor_id))
login_user(load_user(editor.editor_id))
return redirect("/auth/account")
# XXX: what should this actually be?
raise Exception("didn't receive OAuth user_info")
def handle_ia_xauth(email, password):
resp = requests.post(Config.IA_XAUTH_URI,
params={'op': 'authenticate'},
json={
'version': '1',
'email': email,
'password': password,
'access': Config.IA_XAUTH_CLIENT_ID,
'secret': Config.IA_XAUTH_CLIENT_SECRET,
})
if resp.status_code == 401 or (not resp.json().get('success')):
try:
flash("Internet Archive email/password didn't match: {}".format(resp.json()['values']['reason']))
except:
app.logger.warn("IA XAuth fail: {}".format(resp.content))
return render_template('auth_ia_login.html', email=email), resp.status_code
elif resp.status_code != 200:
flash("Internet Archive login failed (internal error?)")
app.logger.warn("IA XAuth fail: {}".format(resp.content))
return render_template('auth_ia_login.html', email=email), resp.status_code
# Successful login; now fetch info...
resp = requests.post(Config.IA_XAUTH_URI,
params={'op': 'info'},
json={
'version': '1',
'email': email,
'access': Config.IA_XAUTH_CLIENT_ID,
'secret': Config.IA_XAUTH_CLIENT_SECRET,
})
if resp.status_code != 200:
flash("Internet Archive login failed (internal error?)")
app.logger.warn("IA XAuth fail: {}".format(resp.content))
return render_template('auth_ia_login.html', email=email), resp.status_code
ia_info = resp.json()['values']
# and pass off "as if" we did OAuth successfully
FakeOAuthRemote = namedtuple('FakeOAuthRemote', ['name', 'OAUTH_CONFIG'])
remote = FakeOAuthRemote(name='archive', OAUTH_CONFIG={'api_base_url': Config.IA_XAUTH_URI})
oauth_info = {
'preferred_username': ia_info['screenname'],
'iss': Config.IA_XAUTH_URI,
'sub': ia_info['itemname'],
}
return handle_oauth(remote, None, oauth_info)
@login_manager.user_loader
def load_user(editor_id):
# looks for extra info in session, and updates the user object with that.
# If session isn't loaded/valid, should return None
if (not session.get('editor')) or (not session.get('api_token')):
return None
editor = session['editor']
token = session['api_token']
user = UserMixin()
user.id = editor_id
user.editor_id = editor_id
user.username = editor['username']
user.token = token
return user
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