interface XMLHttpRequestEventTarget : EventTarget {
  // event handler attributes
           attribute EventListener onabort;
           attribute EventListener onerror;
           attribute EventListener onload;
           attribute EventListener onloadstart;
           attribute EventListener onprogress;
};

interface XMLHttpRequestUpload : XMLHttpRequestEventTarget {
  // for future use
};

[Constructor] interface XMLHttpRequest : XMLHttpRequestEventTarget {
  // event handler attributes
           attribute EventListener onreadystatechange;

  // ready states
  const unsigned short UNSENT = 0;
  const unsigned short OPENED = 1;
  const unsigned short HEADERS_RECEIVED = 2;
  const unsigned short LOADING = 3;
  const unsigned short DONE = 4;
  readonly attribute unsigned short readyState;

  // request metadata
           attribute boolean withCredentials;
  void open(in DOMString method, in DOMString url);
  void open(in DOMString method, in DOMString url, in boolean async);
  void open(in DOMString method, in DOMString url, in boolean async, [Null=Null, Undefined=Null] in DOMString user);
  void open(in DOMString method, in DOMString url, in boolean async, [Null=Null, Undefined=Null] in DOMString user, [Null=Null, Undefined=Null] in DOMString password);
  void setRequestHeader(in DOMString header, in DOMString value);
  
  // request
  readonly attribute XMLHttpRequestUpload upload;
  void send();
  void send(in ByteArray data);
  void send([Null=Null, Undefined=Null] in DOMString data);
  void send(in Document data);
  void abort();

  // response metadata
  DOMString getAllResponseHeaders();
  DOMString getResponseHeader(in DOMString header);
  readonly attribute unsigned short status;
  readonly attribute DOMString statusText;
  
  // response body
  void overrideMimeType(in DOMString mime);
  readonly attribute ByteArray responseBody;
  readonly attribute DOMString responseText;
  readonly attribute Document responseXML;
};