[英]Bottle Server: removing routes
I want to add and remove routes while my bottle server is running.我想在我的Bottle服务器运行时添加和删除路由。
My general question: Is there a proper way to remove routes?我的一般问题:是否有适当的方法来删除路线?
In other words: How can I undo what I've done with app.route
?换句话说:我怎样才能撤消我对app.route
所做的app.route
?
In the following I desrcibe my problem in a more detailed way.下面我更详细地描述我的问题。 Please don't waste your time reading it, if you know the answer to my general question.如果您知道我的一般问题的答案,请不要浪费时间阅读它。
This is a little demo script that describes how I'm working around my problem:这是一个小演示脚本,描述了我如何解决我的问题:
If calling GET /add : a 'Hello World' route is added如果调用GET /add :添加“Hello World”路由
If calling GET /remove : all routes with the same prefix like the 'Hello World' route are changed to trigger a 404 error如果调用GET /remove :所有具有相同前缀的路由(如“Hello World”路由)都将更改为触发404 错误
import bottle
from bottle import redirect, abort
def addRoute():
app.route('/route/hello')(lambda :'Hello World')
print('Routes after calling /add:\n' + '\n'.join([str(route) for route in app.routes]))
redirect('route/hello')
def removeRoute():
prefix = '/route/hello'
#making a list of all routes having the prefix
#because this is a testfile there is only one rule that startswith prefix
routes = [route for route in app.routes if route.rule.startswith(prefix)]
#because there could be multiple routes with the same rule and method,
#making a list without duplicates
ruleMethodTuples = list(dict.fromkeys([(route.rule, route.method) for route in routes]))
for ruleMethod in ruleMethodTuples :
#Workaround: Overwriting the existing route with a 404
#Here I'd prefer to make a statement that removes the existing route instead,
#so the default 404 would be called
app.route(ruleMethod[0], method = ruleMethod[1])(lambda **kwords: abort(404, 'Route deleted'))
print('Routes after calling /remove:\n' + '\n'.join([str(route) for route in app.routes]))
redirect('/route/hello')
if __name__ == '__main__':
app = bottle.app()
app.route('/add')(addRoute)
app.route('/remove')(removeRoute)
print('Initial routes:\n' + '\n'.join([str(route) for route in app.routes]))
bottle.run(app, host = 'localhost', port = 8080)
So here is the output after starting and calling:所以这是启动和调用后的输出:
/add /添加
/remove /消除
/add /添加
showing which routes are in app.routes after every call.在每次调用后显示app.routes中的路由。
Initial routes:
<GET '/add' <function addRoute at 0x02A876A8>>
<GET '/remove' <function removeRoute at 0x00F5F420>>
Bottle v0.12.17 server starting up (using WSGIRefServer())...
Listening on http://localhost:8080/
Hit Ctrl-C to quit.
Routes after calling /add:
<GET '/add' <function addRoute at 0x02A876A8>>
<GET '/remove' <function removeRoute at 0x00F5F420>>
<GET '/route/hello' <function addRoute.<locals>.<lambda> at 0x030C3E88>>
127.0.0.1 - - [25/Aug/2020 23:19:09] "GET /add HTTP/1.1" 303 0
127.0.0.1 - - [25/Aug/2020 23:19:09] "GET /route/hello HTTP/1.1" 200 11
Routes after calling /remove:
<GET '/add' <function addRoute at 0x02A876A8>>
<GET '/remove' <function removeRoute at 0x00F5F420>>
<GET '/route/hello' <function addRoute.<locals>.<lambda> at 0x030C3E88>>
<GET '/route/hello' <function removeRoute.<locals>.<lambda> at 0x030C3FA8>>
127.0.0.1 - - [25/Aug/2020 23:19:14] "GET /remove HTTP/1.1" 303 0
127.0.0.1 - - [25/Aug/2020 23:19:14] "GET /route/hello HTTP/1.1" 404 720
Routes after calling /add:
<GET '/add' <function addRoute at 0x02A876A8>>
<GET '/remove' <function removeRoute at 0x00F5F420>>
<GET '/route/hello' <function addRoute.<locals>.<lambda> at 0x030C3E88>>
<GET '/route/hello' <function removeRoute.<locals>.<lambda> at 0x030C3FA8>>
<GET '/route/hello' <function addRoute.<locals>.<lambda> at 0x030E0270>>
127.0.0.1 - - [25/Aug/2020 23:19:17] "GET /add HTTP/1.1" 303 0
127.0.0.1 - - [25/Aug/2020 23:19:18] "GET /route/hello HTTP/1.1" 200 11
So instead of replacing GET '/route/hello' , the call: app.route adds more routes with the same method and rule on the end of the list.因此,不是替换GET '/route/hello' ,调用: app.route在列表的末尾添加了更多具有相同方法和规则的路由。
However this worked so far, because the latest matching route one is choosen firstly, but I am pretty sure this would result (earlier or later) to performance problems or to a server crash after calling some /add s and /remove s.然而,到目前为止,这是有效的,因为首先选择了最新的匹配路由,但我很确定这会导致(早晚)性能问题或在调用某些/add s 和/remove s 后导致服务器崩溃。
Furthermore I noticed, that I can change app.routes without changing the actual routing, so secondary question:此外,我注意到,我可以在不更改实际路由的情况下更改app.routes ,因此次要问题:
Could I just delete the 'deprecated' routes from app.routes to prevent a stackoverflow?我可以从 app.routes 中删除“已弃用”的路由以防止堆栈溢出吗?
And third question:第三个问题:
Is there something I am doing in a completely wrong way?我是否以完全错误的方式做某事?
I checked source code for add_route我检查了add_route 的源代码
It adds route
to two objects: self.routes
and self.router
( app.routes
and app.router
) and this makes problem.它将route
添加到两个对象: self.routes
和self.router
( app.routes
和app.router
),这会产生问题。
def add_route(self, route):
""" Add a route object, but do not change the :data:`Route.app`
attribute."""
self.routes.append(route)
self.router.add(route.rule, route.method, route, name=route.name)
if DEBUG: route.prepare()
self.router
is object Router which has rules
, builder
, static
dyna_routes
, dyna_regexes
self.router
是对象 路由器,它具有rules
、 builder
、 static
dyna_routes
、 dyna_regexes
If you check them before and after adding new route then you see changes in builder
and static
.如果您在添加新路由之前和之后检查它们,那么您会看到builder
和static
变化。
def addRoute():
print('--- before ---')
print(app.router.rules)
print(app.router.builder)
print(app.router.static)
print(app.router.dyna_routes)
app.route('/route/hello')(lambda :'Hello World')
print('--- after ---')
print(app.router.rules)
print(app.router.builder)
print(app.router.static)
print(app.router.dyna_routes)
print('Routes after calling /add:\n' + '\n'.join([str(route) for route in app.routes]))
redirect('route/hello')
If I remove '/route/hello'
from builder
and static
then '/route/hello'
stop working but app.routes
still shows them so you will have to remove '/route/hello'
from both app.routes
and app.router
- but they don't have special functions for this :)如果我从builder
和static
删除'/route/hello'
然后'/route/hello'
停止工作但app.routes
仍然显示它们,所以你必须从app.routes
和app.router
删除'/route/hello'
- 但他们没有这方面的特殊功能:)
def removeRoute():
prefix = '/route/hello'
del app.router.builder[prefix]
del app.router.static['GET'][prefix]
print('Routes after calling /remove:\n' + '\n'.join([str(route) for route in app.routes]))
redirect('/route/hello')
My full code:我的完整代码:
import bottle
from bottle import redirect, abort
def addRoute():
print('--- before /add ---')
print(app.router.rules)
print(app.router.builder)
print(app.router.static)
print(app.router.dyna_routes)
print(app.router.dyna_regexes)
print('Routes before calling /add:\n' + '\n'.join([str(route) for route in app.routes]))
app.route('/route/hello')(lambda :'Hello World')
print('--- after /add ---')
print(app.router.rules)
print(app.router.builder)
print(app.router.static)
print(app.router.dyna_routes)
print(app.router.dyna_regexes)
print('Routes after calling /add:\n' + '\n'.join([str(route) for route in app.routes]))
redirect('route/hello')
def removeRoute():
prefix = '/route/hello'
print('--- before /remove ---')
print(app.router.rules)
print(app.router.builder)
print(app.router.static)
print(app.router.dyna_routes)
print(app.router.dyna_regexes)
print('Routes before calling /remove:\n' + '\n'.join([str(route) for route in app.routes]))
del app.router.builder[prefix]
del app.router.static['GET'][prefix]
print('--- after /remove ---')
print(app.router.rules)
print(app.router.builder)
print(app.router.static)
print(app.router.dyna_routes)
print(app.router.dyna_regexes)
print('Routes before calling /remove:\n' + '\n'.join([str(route) for route in app.routes]))
redirect('/route/hello')
if __name__ == '__main__':
app = bottle.app()
app.route('/add')(addRoute)
app.route('/remove')(removeRoute)
print('Initial routes:\n' + '\n'.join([str(route) for route in app.routes]))
bottle.run(app, host = 'localhost', port = 8080)
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