没有训练斜杠的URL中的FormDataRoutingRedirect异常

我正在做一个ajax POST请求,我得到了这个异常:

[Fri Nov 29 20:48:55 2013] [error] [client 192.168.25.100]     self.raise_routing_exception(req)
[Fri Nov 29 20:48:55 2013] [error] [client 192.168.25.100]   File "/usr/lib/python2.6/site-packages/flask/app.py", line 1439, in raise_routing_exception
[Fri Nov 29 20:48:55 2013] [error] [client 192.168.25.100]     raise FormDataRoutingRedirect(request)
[Fri Nov 29 20:48:55 2013] [error] [client 192.168.25.100] FormDataRoutingRedirect: A request was sent to this URL (http://example.com/myurl) but a redirect was issued automatically by the routing system to "http://example.com/myurl/".  The URL was defined with a trailing slash so Flask will automatically redirect to the URL with the trailing slash if it was accessed without one.  Make sure to directly send your POST-request to this URL since we can't make browsers or HTTP clients redirect with form data reliably or without user interaction.

路线定义是这样的:

@app.route('/myurl')
def my_func():

我可以在Firebug中看到请求是在没有尾部斜杠的情况下发送的:

http://example.com/myurl
Content-Type    application/x-www-form-urlencoded; charset=UTF-8

我在另一个模块中有这个:

@app.route('/')
@app.route('//')
@app.route('//')
def index(a='', b=''):