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POWhat's the fastest way for a true sinatra(ruby/rack) after_filter?
 

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  1. POWhat's the fastest way for a true sinatra(ruby/rack) after_filter?
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    <p>Okay it's a simple task. After I render html to the client I want to execute a db call with information from the request. </p> <p>I am using sinatra because it's a lightweight microframework, but really i up for anything in ruby, if it's faster/easier(Rack?). I just want to get the url and redirect the client somewhere else based on the url. </p> <p>So how does one go about with rack/sinatra a real after_filter. And by after_filter I mean after response is sent to the client. Or is that just not dooable without threads?</p> <p>I forked sinatra and added after filters, but there is no way to flush the response, even send_data which is suppose to stream files(which is obviously for binary) waits for the after_filters. </p> <p>I've seen this question: <a href="https://stackoverflow.com/questions/367151/multipart-response-in-ruby-rack">Multipart-response-in-ruby</a> but the answer is for rails. And i am not sure if it really flushes the response to the client and then allows for processing afterwards.</p> <p>Rack::Callbacks has some before and after callbacks but even those look like they would run before the response is ever sent to the client here's <a href="http://github.com/rack/rack-contrib/blob/ec0fb58ee4782b29483cba58833d1a67ac33252e/lib/rack/contrib/callbacks.rb" rel="nofollow noreferrer">Rack::Callbacks </a> implementation(added comment):</p> <pre><code>def call(env) @before.each {|c| c.call(env) } response = @app.call(env) @after.each {|c| c.call(env) } response #i am guessing when this method returns then the response is sent to the client. end </code></pre> <p>So i know I could call a background task through the shell with rake. But it would be nice not to have too... Also there is <a href="http://www.espace.com.eg/neverblock" rel="nofollow noreferrer">NeverBlock</a> but is that good for executing a separate process without delaying the response or would it still make the app wait as whole(i think it would)?</p> <p>I know this is a lot, but in short it's simple after_filter that really runs after the response is sent in ruby/sinatra/rack.</p> <p>Thanks for reading or answering my question! :-)</p>
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