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Add example for proc-based route to Routing guide

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Severin Schoepke 2021-05-12 13:56:36 +02:00
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guides/source/routing.md
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@ -920,6 +920,8 @@ As long as `MyRackApp` responds to `call` and returns a `[status, headers, body]
NOTE: For the curious, `'articles#index'` actually expands out to `ArticlesController.action(:index)`, which returns a valid Rack application.
NOTE: Since procs/lambdas are objects that happen to respond to `call` you can implement very simple routes (e.g. for health checks) inline:<br>`get '/health', to: ->(env) { [204, {}, ''] }`
If you specify a Rack application as the endpoint for a matcher, remember that
the route will be unchanged in the receiving application. With the following
route your Rack application should expect the route to be `/admin`: