使用Python Pyramid创建基于角色的访问控制系统

介绍使用Python Pyramid框架创建一个基于角色的访问控制系统的示例代码，实现了不同用户角色访问不同的页面及权限控制。

from pyramid.view import view_config
from pyramid.security import (
    Allow,
    Authenticated,
    forget,
    remember,
)

class Root(object):
    def __init__(self, request):
        self.request = request

    @property
    def __acl__(self):
        return [(Allow, 'group:admin', 'admin'),
                (Allow, Authenticated, 'authenticated')]

    @view_config(route_name='home', renderer='templates/home.pt')
    def home(self):
        return {'project': 'MyProject'}

    @view_config(route_name='admin', renderer='templates/admin.pt', permission='admin')
    def admin(self):
        return {'project': 'MyProject - Admin Panel'}

    @view_config(route_name='login', renderer='templates/login.pt')
    def login(self):
        if self.request.POST:
            username = self.request.POST['username']
            password = self.request.POST['password']
            # Verify username and password here
            if authenticated:
                headers = remember(self.request, username)
                return HTTPFound(location='/', headers=headers)
            else:
                return {'error': 'Invalid username or password'}
        else:
            return {}

    @view_config(route_name='logout')
    def logout(self):
        headers = forget(self.request)
        return HTTPFound(location='/', headers=headers)

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