仿照django的urls风格和模块化结构的flask项目(Django-Style URL Patterns for Flask)

ゞ浴缸里的玫瑰 2022-06-12 07:25 124阅读 0赞

# Django-Style URL Patterns for Flask #

django的urls集中式路由控制相比flask通过装饰器来控制的确很一目了然，习惯了django的urls模式，突然改到flask还有点怀念，于是通过Flask.add\_url\_rule函数实现了一个仿django的urls模式。

github: [https://github.com/pushiqiang/flask\_url/][https_github.com_pushiqiang_flask_url]

目录结构

blog

---\_\_init\_\_.py

---settings.py

---urls.py

---views.py

post

---\_\_init\_\_.py

---urls.py

---views.py

url\_resolvers

---\_\_init\_\_.py

---resolvers.py

注册urls.py的映射:

url\_resolvers/resolvers.py

# -*- coding: utf-8 -*-
    
    import os
    from importlib import import_module
    
    import six
    from exceptions import ImproperlyConfigured
    
    
    class URLPattern(object):
        def __init__(self, regex, view, name, **kwargs):
            self.regex = regex
            self.view = view
            self.kwargs = kwargs
            self.name = name
    
    
    class URLIncludePatterns(object):
        def __init__(self, urlconf_module):
            self.patterns = []
            if isinstance(urlconf_module, six.string_types):
                try:
                    urlconf_module = import_module(urlconf_module)
                except ImportError:
                    raise ImproperlyConfigured('Urls is not configured correctly')
    
            self.patterns = getattr(urlconf_module, 'urlpatterns')
            if filter(lambda pattern: isinstance(pattern, URLIncludePatterns), self.patterns):
                raise ImproperlyConfigured(
                    'Using included patterns in an included URLconf is not allowed.')
    
    
    class RegexURLResolver(object):
        def __init__(self, regex, include, **kwargs):
            self.patterns = include.patterns
            self.regex = regex
            self.kwargs = kwargs
            for pattern in self.patterns:
                if pattern.regex.startswith('/'):
                    pattern.regex = os.path.join(regex, pattern.regex.lstrip('/'))
                else:
                    pattern.regex = os.path.join(regex, pattern.regex)
    
    
    def url(regex, view, name=None, **kwargs):
        # include
        if isinstance(view, URLIncludePatterns):
            return RegexURLResolver(regex, view, **kwargs)
        # url
        elif callable(view):
            return URLPattern(regex, view, name, **kwargs)
        else:
            raise TypeError('view must be a callable or a list/tuple in the case of include().')
    
    
    include = URLIncludePatterns
    
    
    def auto_register_urls(app):
        """
        自动注册url映射
        """
        try:
            urlconf_module = import_module(app.config['ROOT_URLCONF'])
        except (KeyError, ImportError):
            raise ImproperlyConfigured('ROOT_URLCONF is not configured correctly')
    
        url_patterns = getattr(urlconf_module, 'urlpatterns')
        for url_pattern in url_patterns:
            if isinstance(url_pattern, URLPattern):
                app.add_url_rule(
                    url_pattern.regex,
                    endpoint=url_pattern.name,
                    view_func=url_pattern.view,
                    **url_pattern.kwargs
                )
            else:
                for pattern in url_pattern.patterns:
                    app.add_url_rule(
                        pattern.regex,
                        endpoint=pattern.name,
                        view_func=pattern.view,
                        **pattern.kwargs
                    )

使用：

\_\_init\_\_.py

# -*- coding: utf-8 -*-
    
    import os
    from flask import Flask
    
    from url_resolvers.resolvers import auto_register_url
    
    import settings
    
    
    BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    
    app = Flask(__name__)
    app.config.from_object(settings)
    
    # 自动注册urls路径
    auto_register_url(app)

配置：

settings.py

# -*- encoding: utf-8 -*-
    """
    配置文件
    """
    
    ROOT_URLCONF = 'blog.urls'

example:

# 根urls.py配置
    # -*- coding: utf-8 -*-
    
    from url_resolvers.resolvers import url, include
    
    from views import home
    
    
    urlpatterns = [
        url('/home/', home, ),
        url('/post/', include('post.urls')),
    ]
    
    
    # app  urls.py
    # -*- coding: utf-8 -*-
    
    from url_resolvers.resolvers import url, include
    
    from .views import index
    
    
    urlpatterns = [
        url('index/', index, name='index'),
        url('upload/', upload, name='upload', methods=['POST']),
    ]

[https_github.com_pushiqiang_flask_url]: https://github.com/pushiqiang/flask_url/tree/master/blog