Flask 在 URL 路由中支持正则表达式吗？

我知道 Flask 有 int、 float 和 path 转换器，但是我们正在开发的应用程序的 URL 中有更复杂的模式。

有没有一种方法可以使用正则表达式，比如在 Django 中？

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小开

You can hook in custom converters that match for arbitrary expressions: Custom Converter

from random import randrange
from werkzeug.routing import Rule, Map, BaseConverter, ValidationError


class BooleanConverter(BaseConverter):


def __init__(self, url_map, randomify=False):
super(BooleanConverter, self).__init__(url_map)
self.randomify = randomify
self.regex = '(?:yes|no|maybe)'


def to_python(self, value):
if value == 'maybe':
if self.randomify:
return not randrange(2)
raise ValidationError()
return value == 'yes'


def to_url(self, value):
return value and 'yes' or 'no'


url_map = Map([
Rule('/vote/<bool:werkzeug_rocks>', endpoint='vote'),
Rule('/vote/<bool(randomify=True):foo>', endpoint='foo')
], converters={'bool': BooleanConverter})
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最佳答案

Even though Armin beat me to the punch with an accepted answer I thought I'd show an abbreviated example of how I implemented a regex matcher in Flask just in case anyone wants a working example of how this could be done.

from flask import Flask
from werkzeug.routing import BaseConverter


app = Flask(__name__)


class RegexConverter(BaseConverter):
def __init__(self, url_map, *items):
super(RegexConverter, self).__init__(url_map)
self.regex = items[0]




app.url_map.converters['regex'] = RegexConverter


@app.route('/<regex("[abcABC0-9]{4,6}"):uid>-<slug>/')
def example(uid, slug):
return "uid: %s, slug: %s" % (uid, slug)




if __name__ == '__main__':
app.run(debug=True, host='0.0.0.0', port=5000)

this URL should return with 200: http://localhost:5000/abc0-foo/

this URL should will return with 404: http://localhost:5000/abcd-foo/

小开

You could also write a catch all type of route and do complex routing within the method:

from flask import Flask
app = Flask(__name__)


@app.route('/', methods=['GET', 'POST'], defaults={'path': ''})
@app.route('/<path:path>', methods=['GET', 'POST'])
def catch_all(path):
return 'You want path: %s' % path


if __name__ == '__main__':
app.run()

This will match any request. See more details here: Catch-All URL.


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