当年话下
通过运行如下代码:from flask import Flaskfrom pprint import pprintif __name__ == '__main__':
app = Flask(__name__)
pprint(app.url_map.converters)可以获取Flask默认支持的转换器:{'any': <class 'werkzeug.routing.AnyConverter'>, 'default': <class 'werkzeug.routing.UnicodeConverter'>, 'float': <class 'werkzeug.routing.FloatConverter'>, 'int': <class 'werkzeug.routing.IntegerConverter'>, 'path': <class 'werkzeug.routing.PathConverter'>, 'string': <class 'werkzeug.routing.UnicodeConverter'>}那如何创建一个新的路由解析转化器呢?在Flask的app.py里有个简单的例子,这个例子是创建了一个list类型的路由转换器:from werkzeug.routing import BaseConverter
class ListConverter(BaseConverter):
def to_python(self, value):
return value.split(',')
def to_url(self, values):
return ','.join(BaseConverter.to_url(value)
for value in values)
app = Flask(__name__) app.url_map.converters['list'] = ListConverter那么我们可以容易创建一个正则解析器,因为之前的转换器最终也是转换成正则的,只需要将获取的值设置为regex属性就可以使用了:from flask import Flaskfrom werkzeug.routing import BaseConverterclass RegexConverter(BaseConverter): def __init__(self, map, *args):
self.map = map
self.regex = args[0]
app = Flask(__name__)
app.url_map.converters['regex'] = RegexConverter@app.route('/view/<regex("[a-zA-Z0-9]+"):uuid>/')def view(uuid): """
url: /view/1010000000125259/
result: view uuid:1010000000125259
"""
return "view uuid: %s" % (uuid)@app.route('/<regex(".*"):url>')def not_found(url): """
url: /hello
result: not found: 'hello'
"""
return "not found: '%s'" % (url)