python - authenticated - flask login admin

Combinando Flask-inquless, Flask-security y peticiones regulares de Python

Question

Mi objetivo es proporcionar una API REST a mi aplicación web. Utilizando:

• Python 2.7.5
• Frasco == 0.10.1
• Flask-Restless == 0.13.1
• Flask-Security == 1.7.3

Necesito asegurar el acceso a mis datos para acceso web y REST. Sin embargo, no puedo obtener ninguna request python que tenga éxito al intentar conectarme a la API segura.

Las siguientes salidas se obtienen utilizando el módulo completamente funcional proporcionado al final de esta pregunta.

Logro obtener una respuesta correcta cuando uso http://127.0.0.1:5000/api/v1/free_stuff :

>>> import requests
>>> r=requests.get(''http://127.0.0.1:5000/api/v1/free_stuff'')
>>> print ''status:'', r.status_code
status: 200  # all is fine

Al intentar la autenticación con http://127.0.0.1:5000/api/v1/protected_stuff :

>>> from requests.auth import HTTPBasicAuth, HTTPDigestAuth
>>> r=requests.get(''http://127.0.0.1:5000/api/v1/protected_stuff'', 
                   auth=HTTPBasicAuth(''test'', ''test'')) #  the same with ``HTTPDigestAuth``
>>> print ''status:'', r.status_code
status: 401
>>> r.json()  # failed!
{u''message'': u''401: Unauthorized''}

Aquí hay un módulo funcional ficticio utilizado para producir los resultados anteriores:

from flask import Flask, render_template, url_for, redirect
from flask.ext.sqlalchemy import SQLAlchemy
from flask.ext.security import Security, SQLAlchemyUserDatastore, /
    UserMixin, RoleMixin, login_required, current_user
from flask.ext.restless import APIManager
from flask.ext.restless import ProcessingException

# Create app
app = Flask(__name__)
app.config[''DEBUG''] = True
app.config[''SECRET_KEY''] = ''super-secret''
app.config[''SQLALCHEMY_DATABASE_URI''] = ''sqlite://''

# Create database connection object
db = SQLAlchemy(app)

# Define Flask-security models
roles_users = db.Table(''roles_users'',
        db.Column(''user_id'', db.Integer(), db.ForeignKey(''user.id'')),
        db.Column(''role_id'', db.Integer(), db.ForeignKey(''role.id'')))

class Role(db.Model, RoleMixin):
    id = db.Column(db.Integer(), primary_key=True)
    name = db.Column(db.String(80), unique=True)
    description = db.Column(db.String(255))

class User(db.Model, UserMixin):
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(255), unique=True)
    password = db.Column(db.String(255))
    active = db.Column(db.Boolean())
    confirmed_at = db.Column(db.DateTime())
    roles = db.relationship(''Role'', secondary=roles_users,
                            backref=db.backref(''users'', lazy=''dynamic''))
#Some additional stuff to query over...
class SomeStuff(db.Model):
    __tablename__ = ''somestuff''
    id = db.Column(db.Integer, primary_key=True)
    data1 = db.Column(db.Integer)
    data2 = db.Column(db.String(10))
    user_id = db.Column(db.Integer, db.ForeignKey(''user.id''), nullable=True)
    user = db.relationship(User, lazy=''joined'', join_depth=1, viewonly=True)

# Setup Flask-Security
user_datastore = SQLAlchemyUserDatastore(db, User, Role)
security = Security(app, user_datastore)

# API
def auth_func(**kw):
    #import ipdb; ipdb.set_trace()
    if not current_user.is_authenticated():
        raise ProcessingException(description=''Not authenticated!'',
                code=401)
    return True
apimanager = APIManager(app, flask_sqlalchemy_db=db)

apimanager.create_api(SomeStuff,
    methods=[''GET'', ''POST'', ''DELETE'', ''PUT''],
    url_prefix=''/api/v1'',
    collection_name=''free_stuff'',
    include_columns=[''data1'', ''data2'', ''user_id''])

apimanager.create_api(SomeStuff,
    methods=[''GET'', ''POST'', ''DELETE'', ''PUT''],
    url_prefix=''/api/v1'',
    preprocessors=dict(GET_SINGLE=[auth_func], GET_MANY=[auth_func]),
    collection_name=''protected_stuff'',
    include_columns=[''data1'', ''data2'', ''user_id''])

# Create a user to test with
@app.before_first_request
def create_user():
    db.create_all()
    user_datastore.create_user(email=''test'', password=''test'')
    user_datastore.create_user(email=''test2'', password=''test2'')
    ###
    stuff = SomeStuff(data1=2, data2=''toto'', user_id=1)
    db.session.add(stuff)
    stuff = SomeStuff(data1=5, data2=''titi'', user_id=1)
    db.session.add(stuff)
    db.session.commit()

# Views
@app.route(''/'')
@login_required
def home():
    return render_template(''index.html'')

@app.route(''/logout/'')
def log_out():
    logout_user()
    return redirect(request.args.get(''next'') or ''/'')


if __name__ == ''__main__'':
    app.run()

¿Alguna idea?

[edit] para que sea completamente funcional a través de la interfaz web, debe tener una subcarpeta de templates tenga al menos el siguiente archivo login.html :

{% block body %}
  <form action="" method=post class="form-horizontal">
    <h2>Signin to FlaskLogin(Todo) Application </h2>
    <div class="control-group">
        <div class="controls">
          <input type="text" id="username" name="username" class="input-xlarge"
            placeholder="Enter Username" required>
        </div>
    </div>

    <div class="control-group">
        <div class="controls">
          <input type="password" id="password" name="password" class="input-xlarge"
            placeholder="Enter Password" required>
        </div>
    </div>

    <div class="control-group">
        <div class="controls">
          <button type="submit" class="btn btn-success">Signin</button>
        </div>
    </div>  
  </form>
{% endblock %}

Answer 1

Finalmente fui a Flask-JWT ( https://pypi.python.org/pypi/Flask-JWT/0.1.0 )

Aquí está mi ejemplo mínimo modificado:

from flask import Flask, render_template, request, url_for, redirect
from flask.ext.sqlalchemy import SQLAlchemy
from flask.ext.security import Security, SQLAlchemyUserDatastore, /
    UserMixin, RoleMixin, login_required, current_user, logout_user
from flask.ext.restless import APIManager
from flask.ext.restless import ProcessingException
from flask.ext.login import user_logged_in
# JWT imports
from datetime import timedelta
from flask_jwt import JWT, jwt_required

# Create app
app = Flask(__name__)
app.config[''DEBUG''] = True
app.config[''SECRET_KEY''] = ''super-secret''
app.config[''SQLALCHEMY_DATABASE_URI''] = ''sqlite://''
# expiration delay for tokens (here is one minute)
app.config[''JWT_EXPIRATION_DELTA''] = timedelta(seconds=60)

# Create database connection object
db = SQLAlchemy(app)

# creates the JWT Token authentication  ======================================
jwt = JWT(app)
@jwt.authentication_handler
def authenticate(username, password):
    user = user_datastore.find_user(email=username)
    print ''%s vs. %s'' % (username, user.email)
    if username == user.email and password == user.password:
        return user
    return None

@jwt.user_handler
def load_user(payload):
    user = user_datastore.find_user(id=payload[''user_id''])
    return user

# Define Flask-security models ===============================================
roles_users = db.Table(''roles_users'',
        db.Column(''user_id'', db.Integer(), db.ForeignKey(''user.id'')),
        db.Column(''role_id'', db.Integer(), db.ForeignKey(''role.id'')))

class Role(db.Model, RoleMixin):
    id = db.Column(db.Integer(), primary_key=True)
    name = db.Column(db.String(80), unique=True)
    description = db.Column(db.String(255))

class User(db.Model, UserMixin):
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(255), unique=True)
    password = db.Column(db.String(255))
    active = db.Column(db.Boolean())
    confirmed_at = db.Column(db.DateTime())
    roles = db.relationship(''Role'', secondary=roles_users,
                            backref=db.backref(''users'', lazy=''dynamic''))
#Some additional stuff to query over...
class SomeStuff(db.Model):
    __tablename__ = ''somestuff''
    id = db.Column(db.Integer, primary_key=True)
    data1 = db.Column(db.Integer)
    data2 = db.Column(db.String(10))
    user_id = db.Column(db.Integer, db.ForeignKey(''user.id''), nullable=True)
    user = db.relationship(User, lazy=''joined'', join_depth=1, viewonly=True)
# Setup Flask-Security
user_datastore = SQLAlchemyUserDatastore(db, User, Role)
security = Security(app, user_datastore)

# Flask-Restless API ==========================================================
@jwt_required()
def auth_func(**kw):
    return True

apimanager = APIManager(app, flask_sqlalchemy_db=db)

apimanager.create_api(SomeStuff,
    methods=[''GET'', ''POST'', ''DELETE'', ''PUT''],
    url_prefix=''/api/v1'',
    collection_name=''free_stuff'',
    include_columns=[''data1'', ''data2'', ''user_id''])

apimanager.create_api(SomeStuff,
    methods=[''GET'', ''POST'', ''DELETE'', ''PUT''],
    url_prefix=''/api/v1'',
    preprocessors=dict(GET_SINGLE=[auth_func], GET_MANY=[auth_func]),
    collection_name=''protected_stuff'',
    include_columns=[''data1'', ''data2'', ''user_id''])

# Create some users to test with
@app.before_first_request
def create_user():
    db.create_all()
    user_datastore.create_user(email=''test'', password=''test'')
    user_datastore.create_user(email=''test2'', password=''test2'')
    ###
    stuff = SomeStuff(data1=2, data2=''toto'', user_id=1)
    db.session.add(stuff)
    stuff = SomeStuff(data1=5, data2=''titi'', user_id=1)
    db.session.add(stuff)
    db.session.commit()

# Views
@app.route(''/'')
@login_required
def home():
    print(request.headers)
    return render_template(''index.html'')

@app.route(''/logout/'')
def log_out():
    logout_user()
    return redirect(request.args.get(''next'') or ''/'')

if __name__ == ''__main__'':
    app.run()

Luego, para interactuar con él a través de requests :

>>>  import requests, json   
>>>  r=requests.get(''http://127.0.0.1:5000/api/v1/free_stuff'')  # this is OK   
>>>  print ''status:'', r.status_code
status: 200   
>>>  r=requests.get(''http://127.0.0.1:5000/api/v1/protected_stuff'')  # this should fail   
>>>  print ''status:'', r.status_code
status: 401   
>>>  print r.json()
{u''status_code'': 401, 
u''description'': u''Authorization header was missing'', 
u''error'':    u''Authorization Required''}   
>>>  # Authenticate and retrieve Token   
>>>  r = requests.post(''http://127.0.0.1:5000/auth'', 
...:                   data=json.dumps({''username'': ''test'', ''password'': ''test''}),
...:                   headers={''content-type'': ''application/json''}
...:                   )   
>>>  print ''status:'', r.status_code
status: 200   
>>>  token = r.json()[''token'']   
>>>  # now we have the token, we can navigate to restricted area:   
>>>  r = requests.get(''http://127.0.0.1:5000/api/v1/protected_stuff'', 
...:                   headers={''Authorization'': ''Bearer %s'' % token})   
>>>  print ''status:'', r.status_code
status: 200 

Answer 2

Su consulta original (de usar el módulo de solicitudes de Python) me ayudó a despegar :) No hice nada diferente.

No estoy usando Flask-Restless (todavía)

FWIW: Pude obtener el token de autenticación con "solo" Flask-Security (es decir, sin tener que usar Flask-jwt)

Mira aquí para más detalles