middleware

Flask middleware for specific route

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There are a few ways how to add custom processing before specific endpoint. 1) Using python decorator: from functools import wraps def home_decorator(): def _home_decorator(f): @wraps(f) def __home_decorator(*args, **kwargs): # just do here everything what you need print(‘before home’) result = f(*args, **kwargs) print(‘home result: %s’ % result) print(‘after home’) return result return __home_decorator return … Read more

Why middleware mixin declared in django.utils.deprecation.py

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In short: it is a tool to turn deprecated middleware into new one, although it has some limitations. Django’s middleware “style” has changed. This MiddlewareMixin can in most cases “convert” an old-styled middleware class to a new style middleware decorator, as is written in the documentation on Upgrading pre-Django 1.10-style middleware: class django.utils.deprecation.MiddlewareMixin (…) In … Read more

NodeJS + Express: How to secure a URL

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Yep, middleware is exactly what you want. A middleware function is just a function that works just like any other Express route handler, expept it gets run before your actual route handler. You could, for example, do something like this: function requireLogin(req, res, next) { if (req.session.loggedIn) { next(); // allow the next route to … Read more

Why middleware in ASP.NET Core requires specific semantics, but not an interface?

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The Invoke method is flexible and you can ask for additional parameters. ASP.NET will inject the additional parameters using the application’s service configuration. public async Task Invoke(HttpContext ctx, IHostingEnvironment host, ISomethingElse service) { // … } C# interface definitions can’t provide this flexibility in a nice way.

Get ordered list of middleware in a generic rack application?

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$ rake middleware use ActionDispatch::Static use Rack::Lock use #<ActiveSupport::Cache::Strategy::LocalCache::Middleware:0x007ffd148f9468> use Rack::Runtime use Rack::MethodOverride use ActionDispatch::RequestId use Rails::Rack::Logger use ActionDispatch::ShowExceptions use ActionDispatch::DebugExceptions use ActionDispatch::RemoteIp use ActionDispatch::Reloader use ActionDispatch::Callbacks use ActiveRecord::Migration::CheckPending use ActiveRecord::ConnectionAdapters::ConnectionManagement use ActiveRecord::QueryCache use ActionDispatch::Cookies use ActionDispatch::Session::CookieStore use ActionDispatch::Flash use ActionDispatch::ParamsParser use Rack::Head use Rack::ConditionalGet use Rack::ETag run RackTest::Application.routes http://pothibo.com/2013/11/ruby-on-rails-inside-actiondispatch-and-rack/

Grouping routes in Express

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Since express 4 you can define and compose routers const app = require(‘express’); const adminRouter = app.Router(); adminRouter.use(isAdmin); adminRouter.get(“https://stackoverflow.com/”, admin.index); /* will resolve to /admin */ adminRouter.post(‘/post’, csrf, admin.index); /* will resolve to /admin/post */ app.use(‘/admin’, adminRouter); Hope that helps!

React-Redux and Websockets with socket.io

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Spoiler: I am currently developing what’s going to be an open-source chat application. You can do that better by separating actions from the middleware, and even the socket client from the middleware. Hence, resulting in something like this: Types -> REQUEST, SUCCESS, FAILURE types for every request (not mandatory). Reducer -> to store different states … Read more

Is middleware neeeded to redirect to HTTPS in ASP.net and C#?

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You can use your own middleware class, but typically I just do something like this in my Startup configuration: app.Use(async (context, next) => { if (context.Request.IsHttps) { await next(); } else { var withHttps = Uri.UriSchemeHttps + Uri.SchemeDelimiter + context.Request.Uri.GetComponents(UriComponents.AbsoluteUri & ~UriComponents.Scheme, UriFormat.SafeUnescaped); context.Response.Redirect(withHttps); } }); What this does is just grab the entire URL, … Read more