Read/Write to text file in chrome.. Is there a way?

[broli85]

I am writing an extension for Firefox 1.5.

I would like to know if there is a way to write and read data to and from a file which is in the location of the extension (or somewhere in the user's harddisk, where I can store and retrieve some data). I tried to use a write function which I found in one of these threads and tried to give it "chrome://followmylink/files/" as the path.

function fileWriter (filename,content) {
  try {
    var filePath = "chrome://myextension/files/"+filename;
    netscape.security.PrivilegeManager.enablePrivilege ("UniversalXPConnect");
    var file =Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile);
    file.initWithPath(filePath);
    if (!file.exists())
      file.create(0x00, 0644);
 
    var outputStream =Components.classes["@mozilla.org/network/file-output-stream;1"].createInstance(Components.interfaces.nsIFileOutputStream); 
    outputStream.init(file, 0x20 | 0x04, 00004, null);
    outputStream.write(content, content.length);
    outputStream.flush();
    outputStream.close();
    return true;
  }
  catch (e) {
    alert(e);
    return false;
  }  
}

thank you very much

[broli85]

I am writing an extension for Firefox 1.5.

I would like to know if there is a way to write and read data to and from a file which is in the location of the extension (or somewhere in the user's harddisk, where I can store and retrieve some data). I tried to use a write function which I found in one of these threads and tried to give it "chrome://followmylink/files/" as the path.

function fileWriter (filename,content) {
try {
var filePath = "chrome://myextension/files/"+filename;
netscape.security.PrivilegeManager.enablePrivilege ("UniversalXPConnect");
var file =Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile );
file.initWithPath(filePath);
if (!file.exists())
file.create(0x00, 0644);
 
var outputStream =Components.classes["@mozilla.org/network/file-output-stream;1"].createInstance(Components.interfaces.nsIFileOutpu tStream); 
outputStream.init(file, 0x20 | 0x04, 00004, null);
outputStream.write(content, content.length);
outputStream.flush();
outputStream.close();
return true;
}
catch (e) {
alert(e);
return false;
} 
}
 

thank you very much

[broli85]

I am trying to write a function that would write to text file, and each time it tis called, it would write in the next line. This is what I currently have however, this is just overwriting what there is already:

function fileWriter (filename,content) {
  try {
    var filePath = folderpath+filename;
    netscape.security.PrivilegeManager.enablePrivilege ("UniversalXPConnect");
    var file =Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile);
    file.initWithPath(filePath);
    if (!file.exists())
      file.create(0x00, 0644);
 
    var outputStream =Components.classes["@mozilla.org/network/file-output-stream;1"].createInstance(Components.interfaces.nsIFileOutputStream); 
    //outputStream.init(file, 0x20 | 0x04, 00004, null);
    outputStream.init(file, 0x02 | 0x10, 00004, null);
    outputStream.write(content, content.length);
    outputStream.flush();
    outputStream.close();
    return true;
  }
  catch (e) {
    alert(e);
    return false;
  }  
}
 

Please Help!

Thank you

[broli85]

I am trying to find a way to save the user settings of a Firefox Extension. I need two types of storage. One that would store a small number of settings and the other that would store a large number of data that is accumulated by the user while he/she is browsing.

I was thinking of storing the info in a textfile located in the chrome directory of the extension but doesnt seem to work using a normal writing procedure (see my previous post).

Any Ideas??

Thanks very very much for any help