如何在PUMA RACK APP中获得所有请求？

Question

I'm writing a dead-simple puma server, and I keep getting 404 for every request. How do I configure the '/' path without Sinatra?

I simply want to catch all requests.

#config.ru
module Moon
  class HelloWorldApp
    def call(env)
      [200, {}, 'Hello World']
    end
    def each(env=nil)
      env
    end
  end
end

run Rack::Cascade.new Moon::HelloWorldApp.new

I run it like this:

$ puma config.ru -p 9595

Use this curl:

$ curl http://0.0.0.0:9595/test

And get 404:

127.0.0.1 - - [07/Apr/2015:22:49:25 +0300] "GET /test HTTP/1.1" 404 - 0.0002

Answer 1

Rack::Cascade expects an explicit array of apps to be passed to the constructor (or at least something like an enumerable that responds to each and yields the apps). It then calls each on this array to get each app (it looks like you've hit the no method error and tried to work round it by adding an each method to your app).

Fix it by changing the run line to:

run Rack::Cascade.new [Moon::HelloWorldApp.new]

You will also need to change the body part of your returned array, it needs to be something that responds to each and yields String s , the simplest way to fix that is to return an array:

[200, {}, ['Hello World']]