Bottle Server：删除路由

Question

我想在我的Bottle服务器运行时添加和删除路由。我的一般问题：是否有删除路线的正确方法？换句话说：我怎样才能撤消我所做的事情app.route？在下文中，我将以更详细的方式描述我的问题。如果您知道我的一般问题的答案，请不要浪费时间阅读它。这是一个小演示脚本，描述了我如何解决我的问题：如果调用GET /add：添加“Hello World”路由如果调用GET /remove：所有具有相同前缀的路由（如“Hello World”路由）都会更改为触发 404 错误import bottlefrom bottle import redirect, abortdef 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)所以这是启动和调用后的输出：/添加/消除/添加在每次通话后显示app.routes中有哪些路线。因此，调用app.route不是替换GET '/route/hello'，而是在列表末尾添加更多具有相同方法和规则的路由。然而，到目前为止这仍然有效，因为首先选择了最新的匹配路由，但我很确定这会（或早或晚）导致性能问题或在调用一些 /add s 和 /remove s 后导致服务器崩溃。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 ，所以次要问题：我可以从 app.routes 中删除“已弃用”的路由以防止计算器溢出吗？第三个问题：我做的事情完全错误吗？

Answer 1

我检查了add_route的源代码

它添加route到两个对象：self.routesand self.router( app.routesand 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是具有rules, builder, static dyna_routes, _dyna_regexes

如果您在添加新路线之前和之后检查它们，那么您会看到builder和中的变化static。

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')

如果我'/route/hello'从中删除builder然后停止工作但仍然显示它们，那么你将不得不从两者中删除static-但它们没有为此的特殊功能:)'/route/hello'app.routes'/route/hello'app.routesapp.router

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')

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)