权限组件(12):自动发现项目中有别名的URL

自动发现项目中所有有别名的URL,效果如下:

customer_list {'name': 'customer_list', 'url': '/customer/list/'}
customer_add {'name': 'customer_add', 'url': '/customer/add/'}
customer_edit {'name': 'customer_edit', 'url': '/customer/edit/(?P<cid>\\d+)/'}
customer_del {'name': 'customer_del', 'url': '/customer/del/(?P<cid>\\d+)/'}
customer_import {'name': 'customer_import', 'url': '/customer/import/'}
customer_tpl {'name': 'customer_tpl', 'url': '/customer/tpl/'}
payment_list {'name': 'payment_list', 'url': '/payment/list/'}
payment_add {'name': 'payment_add', 'url': '/payment/add/'}
payment_edit {'name': 'payment_edit', 'url': '/payment/edit/(?P<pid>\\d+)/'}
payment_del {'name': 'payment_del', 'url': '/payment/del/(?P<pid>\\d+)/'}
rbac:role_list {'name': 'rbac:role_list', 'url': '/rbac/role/list/'}
rbac:role_add {'name': 'rbac:role_add', 'url': '/rbac/role/add/'}
rbac:role_edit {'name': 'rbac:role_edit', 'url': '/rbac/role/edit/(?P<pk>\\d+)/'}
rbac:role_del {'name': 'rbac:role_del', 'url': '/rbac/role/del/(?P<pk>\\d+)/'}
rbac:user_list {'name': 'rbac:user_list', 'url': '/rbac/user/list/'}
rbac:user_add {'name': 'rbac:user_add', 'url': '/rbac/user/add/'}
rbac:user_edit {'name': 'rbac:user_edit', 'url': '/rbac/user/edit/(?P<pk>\\d+)/'}
rbac:user_del {'name': 'rbac:user_del', 'url': '/rbac/user/del/(?P<pk>\\d+)/'}
rbac:user_reset_pwd {'name': 'rbac:user_reset_pwd', 'url': '/rbac/user/reset/password/(?P<pk>\\d+)/'}
rbac:menu_list {'name': 'rbac:menu_list', 'url': '/rbac/menu/list/'}
rbac:menu_add {'name': 'rbac:menu_add', 'url': '/rbac/menu/add/'}
rbac:menu_edit {'name': 'rbac:menu_edit', 'url': '/rbac/menu/edit/(?P<pk>\\d+)'}
rbac:menu_del {'name': 'rbac:menu_del', 'url': '/rbac/menu/del/(?P<pk>\\d+)'}
rbac:second_menu_add {'name': 'rbac:second_menu_add', 'url': '/rbac/second/menu/add/(?P<menu_id>\\d+)/'}
rbac:second_menu_edit {'name': 'rbac:second_menu_edit', 'url': '/rbac/second/menu/edit/(?P<pk>\\d+)/'}
rbac:second_menu_del {'name': 'rbac:second_menu_del', 'url': '/rbac/second/menu/del/(?P<pk>\\d+)/'}
rbac:permission_add {'name': 'rbac:permission_add', 'url': '/rbac/permission/add/(?P<second_menu_id>\\d+)/'}
rbac:permission_edit {'name': 'rbac:permission_edit', 'url': '/rbac/permission/edit/(?P<pk>\\d+)/'}
rbac:permission_del {'name': 'rbac:permission_del', 'url': '/rbac/permission/del/(?P<pk>\\d+)/'}
rbac:multi_permissions {'name': 'rbac:multi_permissions', 'url': '/rbac/multi/permissions/'}

一、配置路由

rbac/urls.py

from django.urls import re_path

...
from rbac.views import menu
...
urlpatterns = [
    ...
    # 批量操作权限
    re_path(r'^multi/permissions/$', menu.multi_permissions, name='multi_permissions')  # 自动发现项目中的所有URL
    ...
]

二、自动发现URL功能实现

排除不用发现的URL

settings.py

...
AUTO_DISCOVER_EXCLUDE = [
    '/admin/',
    '/login/',
]
...

 

rbac/service/router.py

import re
from collections import OrderedDict

from django.conf import settings
from django.utils.module_loading import import_string  # 根据字符串的形式,帮我们去导入模块
from django.urls import URLPattern, URLResolver  # 路由分发:URLResolver。非路由分发:URLPattern


def check_url_exclude(url):
    """
    排除一些特定的url
    :param url:
    :return:
    """
    for regex in settings.AUTO_DISCOVER_EXCLUDE:
        if re.match(regex, url):
            return True


def recursion_urls(pre_namespace, pre_url, urlpatterns, url_ordered_dict):
    """
    :param pre_namespace: namespace前缀(rbac:xxx),以后用于拼接name
    :param per_url: url的前缀(rbac/xxx),以后用于拼接url
    :param urlpatterns: 路由关系列表
    :param url_ordered_dict: 用于保存递归中获取的所有路由
    :return:
    """

    # 路由分发:URLResolver。非路由分发:URLPattern
    for item in urlpatterns:
        if isinstance(item, URLPattern):  # 非路由分发,将路由添加到url_ordered_dict
            if not item.name:  # url中反向命名的name,没有的话不做处理,直接跳过。
                continue
            if pre_namespace:  # 如果有命名空间就进行拼接。示例:rbac:role_list
                name = f'{pre_namespace}:{item.name}'
            else:
                name = item.name  # 示例:role_list

            # 判断url有没有前缀,如果有前缀的话我们要给它拼接上,一般url都是有前缀的,因为从根级路由开始我们就加了个/
            # 下面两种写法都可以
            url = pre_url + str(item.pattern)
            # url = pre_url + item.pattern.regex.pattern  # pattern.regex.pattern是拿到当前url django 1.X里是 url._regex
            # 拼接完长这样:/^rbac/^user/edit/(?P<pk>\d_+)/$
            url = url.replace('^', '').replace('$', '').replace('\/', '/')
            # 把起始符和终止符替换成空的,最后得到:/rbac/user/edit/(?P<pk>\d_+)/
            # django2.0中的path会多一个反斜杠\,例子:'/rbac\/permission/del/(?P<pk>\d+)/'
            # 为了兼容django2.0中的path,要把\/换成/,最后成为:/rbac/permission/del/(?P<pk>\d+)/

            if check_url_exclude(url):  # 判断是否admin、login等我们不需要的url,是的话直接跳过
                continue

            url_ordered_dict[name] = {'name': name, 'url': url}
            # 'rbac:menu_list':{name:'rbac:menu_list',url:'xxxxx/yyyy/menu/list'}

        elif isinstance(item, URLResolver):  # 路由分发,进行递归操作
            if pre_namespace:
                """
                # 有前缀  示例:admin,admin.site.urls的urls的返回值是:
                @property
                def urls(self):
                    return self.get_urls(), 'admin', self.name。 返回值的第二个是命名空间
                """
                if item.namespace:  # 如果有自己的namespace比如说user_list,和前面的pre_namespace进行拼接,结果是rbac:user_list:user_list里的url
                    namespace = f"{pre_namespace}:{item.namespace}"
                else:
                    """
                    自己没有namespace,但是父级有,那么namespace就是None
                    示例:re_path(r'^role/list/$', include('xxx.urls'))。rbac里的一条路由又进行路由分发,但是自己没有命名空间
                    """
                    namespace = item.namespace 
            else:
                if item.namespace:  # 父级没有namespace,自己有。示例:re_path(r'^rbac/', include(('rbac.urls', 'rbac')), )
                    namespace = item.namespace
                else:  # 父级没有namespace,自己也没有
                    namespace = None

            # 下面两种写法都可以
            recursion_urls(namespace, pre_url + str(item.pattern), item.url_patterns, url_ordered_dict)
            # recursion_urls(namespace, pre_url + item.pattern.regex.pattern, item.url_patterns, url_ordered_dict)

            """
            pre_url(上一级的url) + item.pattern.regex.pattern(当前路由分发的前缀),item.url_patterns(当前路由分发的urlpatterns)
            拿re_path(r'^rbac/', include(('rbac.urls', 'rbac')))举例:
            namespace = rbac,  pre_url=/,  item.pattern.regex.pattern=^rbac/,item.url_patterns = rbac.urls下的所有url
            在django1.x里item.pattern.regex.pattern要换成item.regex.pattern
       如果rbac里还有路由分发的话,比如说rbac2,那么pre_url + str(item.pattern) 就是 rbac/rbac2,传到非路由分发的方法那就会继续拼接成如:rbac/rbac2/add/
""" def get_all_url_dict(): """ 获取项目中所有的URL(必须有name别名) :return: """ url_ordered_dict = OrderedDict() all_url = import_string(settings.ROOT_URLCONF) # from permission_learn import urls recursion_urls(None, '/', all_url.urlpatterns, url_ordered_dict) # 递归的去获取所有的路由。根目录没有namespace,根路由用/ # 得到类似这样的结果: """ { 'rbac:menu_list':{name:'rbac:menu_list',url:'xxxxx/yyyy/menu/list'} } """ return url_ordered_dict

 

 

三、在视图函数引用

rbac/views/menu.py

...
from rbac.service.router import get_all_url_dict
...

...
def multi_permissions(request):
    """
    批量操作权限
    :param request:
    :return:
    """

    # 获取项目中所有的url

    all_url_dict = get_all_url_dict()
    for k, v in all_url_dict.items():
        print(k, v)

    return HttpResponse('ok it')
...

 

以后我们需要在页面展示这些URL,并对其进行增删改和权限操作

posted @ 2019-03-12 17:41  梁少华  阅读(435)  评论(0编辑  收藏  举报