Class: Rack::ReverseProxy

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/reverse_proxy.rb

Instance Method Summary collapse

Constructor Details

#initialize(app = nil, &b) ⇒ ReverseProxy

Returns a new instance of ReverseProxy.



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# File 'lib/rack/reverse_proxy.rb', line 6

def initialize(app = nil, &b)
  @app = app || lambda {|env| [404, [], []] }
  @matchers = []
  @global_options = {:preserve_host => true, :x_forwarded_host => true, :matching => :all, :verify_ssl => true}
  instance_eval &b if block_given?
end

Instance Method Details

#call(env) ⇒ Object 



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

def call(env)
  rackreq = Rack::Request.new(env)
  matcher = get_matcher rackreq.fullpath
  return @app.call(env) if matcher.nil?

  uri = matcher.get_uri(rackreq.fullpath,env)
  all_opts = @global_options.dup.merge(matcher.options)
  headers = Rack::Utils::HeaderHash.new
  env.each { |key, value|
    if key =~ /HTTP_(.*)/
      headers[$1] = value
    end
  }
  headers['HOST'] = uri.host if all_opts[:preserve_host]
  headers['X-Forwarded-Host'] = rackreq.host if all_opts[:x_forwarded_host]

  session = Net::HTTP.new(uri.host, uri.port)
  session.read_timeout=all_opts[:timeout] if all_opts[:timeout]

  session.use_ssl = (uri.scheme == 'https')
  if uri.scheme == 'https' && all_opts[:verify_ssl]
    session.verify_mode = OpenSSL::SSL::VERIFY_PEER
  else
    # DO NOT DO THIS IN PRODUCTION !!!
    session.verify_mode = OpenSSL::SSL::VERIFY_NONE
  end
  session.start { |http|
    m = rackreq.request_method
    case m
    when "GET", "HEAD", "DELETE", "OPTIONS", "TRACE"
      req = Net::HTTP.const_get(m.capitalize).new(uri.request_uri, headers)
      req.basic_auth all_opts[:username], all_opts[:password] if all_opts[:username] and all_opts[:password]
    when "PUT", "POST"
      req = Net::HTTP.const_get(m.capitalize).new(uri.request_uri, headers)
      req.basic_auth all_opts[:username], all_opts[:password] if all_opts[:username] and all_opts[:password]

      if rackreq.body.respond_to?(:read) && rackreq.body.respond_to?(:rewind)
        body = rackreq.body.read
        req.content_length = body.size
        rackreq.body.rewind
      else
        req.content_length = rackreq.body.size
      end

      req.content_type = rackreq.content_type unless rackreq.content_type.nil?
      req.body_stream = rackreq.body
    else
      raise "method not supported: #{m}"
    end

    body = ''
    res = http.request(req) do |res|
      res.read_body do |segment|
        body << segment
        # ensure content length header is correct
        res.content_length = body.bytesize
      end
    end

    [res.code, create_response_headers(res), [body]]
  }
end