Determining the HTTP port from within a Rack request

Question

I am developing a Sinatra web app and there I want to canonicalize and absolutize a number of URLs. For this, I am using a Rack::Request object:

before do
  @cached_request = Rack::Request.new(env)
end

def absolutize(path)
  u = URI.parse('/%s' % path) # Ensure leading slash is there
  u.scheme =  @cached_request.scheme
  u.host =  @cached_request.host
  u.port =  @cached_request.port
  u.to_s
end

However, even when my app is running on port 9393 the SERVER_PORT variable has 80. I've examined the env object for relevant info but it seems that it hasn't got any information on the request port.

How am I supposed to figure this one out from within the application? I don't see references to the variable in the rack spec...

So far I've tried running the rackup file on Puma and Webrick.

have you tried the request helper from within Sinatra e.g calling request.port ? See sinatrarb.com/intro#Accessing%20the%20Request%20Object — iain

Julik Julik · Accepted Answer · 2012-07-15T14:25:46

Ok I figured it out. This only happens with requests done through MarsEdit, due to the fact that MarsEdit does not send a port suffix in the Host header (which is what pretty much all Rack servers use to infer the server port).

I've contacted Daniel with a bugreport.

Determining the HTTP port from within a Rack request

1 Answers