Class: Ebb::Response

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

Constant Summary collapse

HTTP_STATUS_CODES = 
{
  100  => 'Continue', 
  101  => 'Switching Protocols', 
  200  => 'OK', 
  201  => 'Created', 
  202  => 'Accepted', 
  203  => 'Non-Authoritative Information', 
  204  => 'No Content', 
  205  => 'Reset Content', 
  206  => 'Partial Content', 
  300  => 'Multiple Choices', 
  301  => 'Moved Permanently', 
  302  => 'Moved Temporarily', 
  303  => 'See Other', 
  304  => 'Not Modified', 
  305  => 'Use Proxy', 
  400  => 'Bad Request', 
  401  => 'Unauthorized', 
  402  => 'Payment Required', 
  403  => 'Forbidden', 
  404  => 'Not Found', 
  405  => 'Method Not Allowed', 
  406  => 'Not Acceptable', 
  407  => 'Proxy Authentication Required', 
  408  => 'Request Time-out', 
  409  => 'Conflict', 
  410  => 'Gone', 
  411  => 'Length Required', 
  412  => 'Precondition Failed', 
  413  => 'Request Entity Too Large', 
  414  => 'Request-URI Too Large', 
  415  => 'Unsupported Media Type', 
  500  => 'Internal Server Error', 
  501  => 'Not Implemented', 
  502  => 'Bad Gateway', 
  503  => 'Service Unavailable', 
  504  => 'Gateway Time-out', 
  505  => 'HTTP Version not supported'
}.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(connection, last) ⇒ Response

Returns a new instance of Response.



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# File 'lib/ebb.rb', line 163

def initialize(connection, last)
  @connection = connection
  @last = last
  @output = []
  @finished = false
  @chunked = false 
end

Instance Attribute Details

#connection ⇒ Object

Returns the value of attribute connection.



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# File 'lib/ebb.rb', line 162

def connection
  @connection
end

#last ⇒ Object

Returns the value of attribute last.



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# File 'lib/ebb.rb', line 162

def last
  @last
end

#output ⇒ Object (readonly)

Returns the value of attribute output.



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# File 'lib/ebb.rb', line 161

def output
  @output
end

Instance Method Details

#call(status, headers, body) ⇒ Object 



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# File 'lib/ebb.rb', line 171

def call(status, headers, body)
  @head = "HTTP/1.1 #{status} #{HTTP_STATUS_CODES[status.to_i]}\r\n"

  # Hack to be compatible with frameworks who return Strings.
  if body.kind_of?(String)
    headers["Content-Length"] = body.length.to_s
    body = [body]
  end

  # XXX i would prefer to do
  # @chunked = true unless body.respond_to?(:length)
  if headers["Transfer-Encoding"] == "chunked" or 
     !headers.has_key?("Content-Length") 
  then
    headers["Transfer-Encoding"] = "chunked"
    @chunked = true 
  end
  # I also don't like this
  @last = true if headers["Connection"] == "close"

  headers.each { |field, value| @head << "#{field}: #{value}\r\n" }
  @head << "\r\n"
  
  body.each do |chunk| 
    write(chunk) 
  end

  body.on_error { close } if body.respond_to?(:on_error)

  if body.respond_to?(:on_eof)
    body.on_eof { finish }
  else
    finish
  end

  # deferred requests SHOULD NOT respond to close
  body.close if body.respond_to?(:close)
end

#finish ⇒ Object 



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# File 'lib/ebb.rb', line 214

def finish
  @finished = true 
  write("") if @chunked
end

#finished? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ebb.rb', line 210

def finished?
  @output.empty? and @finished
end

#write(chunk) ⇒ Object 



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# File 'lib/ebb.rb', line 219

def write(chunk)
  encoded = @chunked ? "#{chunk.length.to_s(16)}\r\n#{chunk}\r\n" : chunk
  if @head.nil?
    @output << encoded
  else
    @output << @head + encoded
    @head = nil
  end
  @connection.write
end