firefox extension: kako prebrati datoteko iz diska

nikjer na netu ne najdem skoraj nic dokumentcije oz primerov...
edino tukaj je nekaj... (ampak ni primerov delujocih):
https://developer.mozilla.org/en/FileGu...

in pise da je IO global object ki je vedno in povsod dostopen
ampak meni "try catch" pribije exception "ReferenceError: IO is not defined"

moji poizkusi z:
var IO = Components.classes["@mozilla.org/io/scriptable-io;1"].getService();
tudi nic ne obrodijo



ok.. spodaj je koda s katero sem probaval

vse je zakomentirano razen "try catch poizkusa" cisto na vrhu, ki je edini, ki je obrodil vsaj nekaj - en exception (lol)

ostalo kodo sem dodal da vidite kaj sem poizkusal (nekaj sem je malo na blef skopiral iz raznih extensionov)

function PreberiFajl(){
	alert("read start");


	//var scriptableIO = Components.classes["@mozilla.org/io/scriptable-io;1"].getService();
        //var IO = Components.classes["@mozilla.org/io/scriptable-io;1"].getService();

try {
  var file = IO.getFile("Desktop", "myinfo.txt");
  var stream = IO.newOutputStream(file, "text");
} catch (ex) { alert(ex); }




/*
	var fp = Components.classes["@mozilla.org/filepicker;1"].createInstance(Components.interfaces.nsIFilePicker);
	var stream = Components.classes["@mozilla.org/network/file-output-stream;1"].createInstance(Components.interfaces.nsIFileOutputStream);


stream.init("c:\\sample.txt", 0x02, 0x200, null);

	    for (var i = 0; i < 10 ; i++) {
	  //    stream.write("aaabbb", 4);
	    }
    stream.close();
*/

/*
	fp.init(window, null, fp.modeSave);
	  fp.defaultExtension = "txt";
	  fp.defaultString = "TMPpref";
	  fp.appendFilters(fp.filterText);

	  if (fp.show() != fp.returnCancel) {
	    if (fp.file.exists()) fp.file.remove(true);
	    fp.file.create(fp.file.NORMAL_FILE_TYPE, 0666);
	    stream.init(fp.file, 0x02, 0x200, null);

	    for (var i = 0; i < 10 ; i++) {
	    //  stream.write("aaab\n", 4);
	    }

    stream.close();
*/
	//var file = IO.getFile("Home", "sample.txt");
	//var file = IO.getFile("Profile", "sample.txt");


	//if (file.exists())
	//  alert("The file is there!");
	//else
	//  alert("File not found!");

	//var stream = IO.newInputStream(file, "text");

	//var lines = [];
	//while(stream.available())
	//  lines.push(stream.readLine());


    alert("read konec");
}

hvala za pomoc

uporabljam ff 3.5.5

torej kako se to naredi v 3.5.5

SE DA.

evo.. mije ratalo...

koda iz tukaj deluje

https://developer.mozilla.org/en/Code_s...

var file = Components.classes["@mozilla.org/file/local;1"].
	                     createInstance(Components.interfaces.nsILocalFile);
	file.initWithPath("C:\\sample.txt");

// open an input stream from file
var istream = Components.classes["@mozilla.org/network/file-input-stream;1"].
                        createInstance(Components.interfaces.nsIFileInputStream);
istream.init(file, 0x01, 0444, 0);
istream.QueryInterface(Components.interfaces.nsILineInputStream);

// read lines into array
var line = {}, lines = [], hasmore;
do {
  hasmore = istream.readLine(line);
  lines.push(line.value);
} while(hasmore);

istream.close();

// do something with read data
alert(lines);

prebere file...

drugace zaradi varnosti ima recimo greasemonkey to onemogoceno... ampak extensioni pa lahko pisejo in berejo po disku (kako bi sicer razni session saver extensioni delovali?)..
(ker itak extension mora clovek odobriti sam da ga instalira)

zdaj me samo se zanima kaksen je ukaz za formatirat disk iz fajrfoksa (haha)