auth.py

# amnesia/amnesia/forms/helpers.py 
# -*- coding: utf-8 -*-

from pyramid.renderers import render

from . import htmlfill

def render_form(template, request, data=None, **kwargs):
    if data is None:
        data = {}

    form = render(template, data, request=request)
    return htmlfill.render(form, data, **kwargs)


  
  
# amnesia/amnesia/modules/authentication/views/__init__.py 

@view_defaults(context=AuthResource)
class login:

    template = 'amnesia:templates/authentication/_form_login.pt'

    def __init__(self, context, request):
        self.context = context
        self.request = request

    def form(self, data=None, errors=None):
        return render_form(self.template, self.request, data, errors=errors)

    def GET(self):
        return {'form': self.form()}

    def POST(self):
        result = LoginSchema().load(self.request.POST.mixed())

        if result.errors:
            return {'form': self.form(result.data, result.errors)}

        login = result.data['login']
        password = result.data['password']

        user = self.context.find_login(login)

        if user:
            if self.context.check_user_password(user, password):
                headers = remember(self.request, user.id)
                return HTTPFound(location='/', headers=headers)
            else:
                errors = {'password': "Password doesn't match"}
        else:
            errors = {'login': 'Invalid login'}

        form = self.form(result.data, errors)

        return {'form': form}