blueprints.py 文件源码

def test_blueprint_url_processors(self):
        bp = flask.Blueprint('frontend', __name__, url_prefix='/<lang_code>')

        @bp.url_defaults
        def add_language_code(endpoint, values):
            values.setdefault('lang_code', flask.g.lang_code)

        @bp.url_value_preprocessor
        def pull_lang_code(endpoint, values):
            flask.g.lang_code = values.pop('lang_code')

        @bp.route('/')
        def index():
            return flask.url_for('.about')

        @bp.route('/about')
        def about():
            return flask.url_for('.index')

        app = flask.Flask(__name__)
        app.register_blueprint(bp)

        c = app.test_client()

        self.assert_equal(c.get('/de/').data, b'/de/about')
        self.assert_equal(c.get('/de/about').data, b'/de/')