chrome extension download files

chrome extension download files

I'm writing a js extension for chrome that should download multiple
created files. the problem is that chrome auto opens the file in the
current tab at the following address:
filesystem:http://stackoverflow.com//temporary/myfile.ini and second if I
cycle on an array made this way fileini = [ ["filename",file-content], [],
... ] it just print the last one and if I try to cycle on it using a
setTimeout I get an error from the console
below I post the code
function createDataFile(filename, content) {
window.requestFileSystem = window.requestFileSystem ||
window.webkitRequestFileSystem;
window.requestFileSystem(window.TEMPORARY, 1024 * 1024 * 20, function(fs) {
fs.root.getFile(filename, {
create : true
}, function(fileEntry) {
fileEntry.createWriter(function(fileWriter) {
var blob = new Blob(content);
console.log("5");
fileWriter.addEventListener("writeend", function() {
// navigate to file, will download
location.href = fileEntry.toURL();
}, false);
fileWriter.write(blob);
}, function() {
});
}, function() {
});
}, errorHandler);
}
function errorHandler(e) { var msg = '';
switch (e.code) {
case FileError.QUOTA_EXCEEDED_ERR:
msg = 'QUOTA_EXCEEDED_ERR';
break;
case FileError.NOT_FOUND_ERR:
msg = 'NOT_FOUND_ERR';
break;
case FileError.SECURITY_ERR:
msg = 'SECURITY_ERR';
break;
case FileError.INVALID_MODIFICATION_ERR:
msg = 'INVALID_MODIFICATION_ERR';
break;
case FileError.INVALID_STATE_ERR:
msg = 'INVALID_STATE_ERR';
break;
default:
msg = 'Unknown Error';
break;
};
console.log('Error: ' + msg);
}
createFileCycle();
function prnt(x) {
var y;
if (fileini[x] !== undefined) {
createDataFile(fileini[x][0], objToArray(fileini[x][1]));
y = x - 1;
console.log("printed file" + x);
} else {
y = x - 1;
}
if (x > 0)
return setTimeout(function() {
console.log("going to print file " + y);
prnt(y);
}, 500);
else
return 0;
}
prnt(fileini.length - 1);