Class: Rack::Forward

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/forward.rb,
lib/rack/forward/version.rb

Constant Summary collapse

HTTP_METHODS = 
%w(GET HEAD PUT POST DELETE OPTIONS PATCH)
VERSION = 
"0.0.2"

Instance Method Summary collapse

Constructor Details

#initialize(app, &block) ⇒ Forward

Returns a new instance of Forward.



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# File 'lib/rack/forward.rb', line 8

def initialize(app, &block)
  self.class.send(:define_method, :uri_for, &block)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/forward.rb', line 13

def call(env)
  req    = Rack::Request.new(env)
  uri    = uri_for(req)
  method = req.request_method.upcase

  return @app.call(env) unless uri && HTTP_METHODS.include?(method)

  sub_request = Net::HTTP.const_get(method.capitalize).new("#{uri.path}#{"?" if uri.query}#{uri.query}")

  if sub_request.request_body_permitted? and req.body
    sub_request.body_stream = req.body
    sub_request.content_length = req.content_length
    sub_request.content_type = req.content_type
  end

  sub_request["X-Forwarded-For"] = (req.env["X-Forwarded-For"].to_s.split(/, +/) + [req.env['REMOTE_ADDR']]).join(", ")
  sub_request["Accept-Encoding"] = req.accept_encoding
  sub_request["Referer"] = req.referer

  sub_response = Net::HTTP.start(uri.host, uri.port) do |http|
    http.request(sub_request)
  end

  headers = {}
  sub_response.each_header do |k, v|
    headers[k] = v unless k.to_s =~ /cookie|content-length|transfer-encoding/i
  end

  [sub_response.code.to_i, headers, [sub_response.read_body]]
end