Module: Roda::RodaPlugins::Proxy::RequestMethods

Defined in:
lib/roda/proxy.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#proxy ⇒ Object

Proxies the request, forwarding all headers except Host which is rewritten to be the destination host. The response headers, body and status are returned to the client.



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# File 'lib/roda/proxy.rb', line 37

def proxy
  method = Faraday.method(env['REQUEST_METHOD'].downcase.to_sym)
  f_response = method.call(_proxy_url) { |req| _proxy_request(req) }
#           p f_response
  _respond(f_response)
end

#proxy_when(condition = true, probability: 1.0) ⇒ Object

Conditionally proxies when condition is true and with selective probability. For instance, to proxy 50% of the time:

r.proxy_when(probability: 0.5)

Condition can be a truthy value or a block / lambda, in which case the result from the #call is expected to be truthy.

r.proxy_when( r.env['HTTP_PROXY_ME'] == 'true' )

The two parameters can be combined, the probability is evaluated first.

r.proxy_when( r.env['HTTP_PROXY_ME'] == 'true', probability: 0.8 )

If and only if this method choses not to proxy is the block evaluated. The block is then expected to return a meaningful response to Roda.



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# File 'lib/roda/proxy.rb', line 54

def proxy_when(condition = true, probability: 1.0)
  shall_proxy = Random.rand(0.0..1.0) <= probability
            
  if shall_proxy && ( condition.respond_to?(:call) ? condition.call : condition )
    proxy
  else
    yield(self)
  end
end