Failed to write file using xul

Question

Trying to write a file inside temp temp directory using XUL code:

function writeFile_launch_application(utility_name,utility_path) { var data ='tasklist /nh /fi "imagename eq '+utility_name+'" | find /i "'+utility_name+'">nul && (echo alerady running) || ("'+utility_path+'")'; //alert(data); var file = Cc["@mozilla.org/file/directory_service;1"]. getService(Ci.nsIProperties). get("TmpD", Ci.nsIFile); file.append("launch_application.bat"); file.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0666); // Then, we need an output stream to our output file. var ostream = Cc["@mozilla.org/network/file-output-stream;1"]. createInstance(Ci.nsIFileOutputStream); ostream.init(file, -1, -1, 0); // Finally, we need an input stream to take data from. const TEST_DATA = data; let istream = Cc["@mozilla.org/io/string-input-stream;1"]. createInstance(Ci.nsIStringInputStream); istream.setData(TEST_DATA, TEST_DATA.length); NetUtil.asyncCopy(istream, ostream, function(aResult) { if (!Components.isSuccessCode(aResult)) { // an error occurred! } }) } 

But the error is:

 Timestamp: 11/29/2012 11:03:09 PM Error: ReferenceError: Cc is not defined Source File: chrome://myaddon/content/overlay.js Line: 199 

I also tried adding the below line at the top of my code, but this did not solve the above error:

 Components.utils.import("resource://gre/modules/NetUtil.jsm"); Components.utils.import("resource://gre/modules/FileUtils.jsm"); 

Answer 1

Cc and Ci are aliases for Components.classes and Components.interfaces, respectively.

Depending on the context, they may (or may not be defined) already defined.

Anyway

 const Cc = Components.classes; const Ci = Components.interfaces; const Cu = Components.utils; const Cr = Components.results; 

(you should not mark your question as firefox-addon-sdk )

Answer 2

When I develop my addon, I always try to replace Components.utils , Components.intefaces with Cu and Ci . To do this, the first line in my file:

 const { Cc, Ci, Cu } = require('chrome'); 

Cc is Component.classes . What can you use now

 Cu.import("resource://gre/modules/FileUtils.jsm"); Cu.import("resource://gre/modules/NetUtil.jsm");