Class: StompServer::Protocols::Http

Inherits:
EventMachine::Connection
  • Object
show all
Defined in:
lib/stomp_server/protocols/http.rb

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Http

Returns a new instance of Http.



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# File 'lib/stomp_server/protocols/http.rb', line 17

def initialize *args
  super
  @buf = ''
end

Instance Method Details

#create_response(code, response_text) ⇒ Object 



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# File 'lib/stomp_server/protocols/http.rb', line 105

def create_response(code,response_text)
  response = ''
  @headers_out['Content-Length'] = response_text.size

  case code
  when '200'
    response << "HTTP/1.1 200 OK\r\n"
  when '500'
    response << "HTTP/1.1 500 Server Error\r\n"
  when '404'
    response << "HTTP/1.1 404 Message Not Found\r\n"
  end
  @headers_out.each_pair do |key, value|
    response << "#{key}:#{value}\r\n"
  end
  response << "\r\n"
  response << response_text
  send_data(response)
  unbind if @request.params['HTTP_CONNECTION'] == 'close'
end

#parse_request(data) ⇒ Object 



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# File 'lib/stomp_server/protocols/http.rb', line 38

def parse_request data
  @buf << data
  case @state
  when :headers
    @nparsed = @parser.execute(@params, @buf, @nparsed)
    if @parser.finished?
      @request = Mongrel::HttpRequest.new(@params,@buf)
      @request_method = @request.params[Mongrel::Const::REQUEST_METHOD]
      content_length = @request.params[Mongrel::Const::CONTENT_LENGTH].to_i
      @request_length = @nparsed + content_length
      @remain = content_length - @request.params.http_body.length
      if @remain <= 0
        @buf = @buf[@request_length+1..-1] || ''
        process_request
        post_init
        return
      end
      @request.body.write @request.params.http_body
      @state = :body
    end
  when :body
    @remain -= @request.body.write data[0...@remain]
    if @remain <= 0
      @buf = @buf[@request_length+1..-1] || ''
      process_request
      post_init
      return
    end
  end
end

#post_init ⇒ Object 



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# File 'lib/stomp_server/protocols/http.rb', line 23

def post_init
  @parser = Mongrel::HttpParser.new
  @params = Mongrel::HttpParams.new
  @nparsed = 0
  @request = nil
  @request_method = nil
  @request_length = 0
  @state = :headers
  @headers_out = {'Content-Length' => 0, 'Content-Type' => 'text/plain; charset=UTF-8'}
end

#process_request ⇒ Object 



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# File 'lib/stomp_server/protocols/http.rb', line 69

def process_request
  begin
    @request.body.rewind
    dest = @request.params[Mongrel::Const::REQUEST_PATH]
    case @request_method
    when 'PUT'
      @frame = StompServer::StompFrame.new
      @frame.command = 'SEND'
      @frame.body = @request.body.read
      @frame.headers['destination'] = dest
      if @@queue_manager.enqueue(@frame)
        create_response('200','Message Enqueued')
      else
        create_response('500','Error enqueueing message')
      end
    when 'GET'
      if frame = @@queue_manager.dequeue(dest)
        @headers_out['message-id'] = frame.headers['message-id']
        create_response('200',frame.body)
      else
        create_response('404','No messages in queue')
      end
    else
      create_response('500','Invalid Command')
    end
  rescue Exception => e
    puts "err: #{e} #{e.backtrace.join("\n")}"
    create_response('500',e)
  end
end

#receive_data(data) ⇒ Object 



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# File 'lib/stomp_server/protocols/http.rb', line 34

def receive_data data
  parse_request(data)
end

#unbind ⇒ Object 



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# File 'lib/stomp_server/protocols/http.rb', line 100

def unbind
  puts "Closing connection"
  close_connection_after_writing
end