gistfile1.txt

function formatFileError(err){
  var sb = err.toString();
	for( var k in err ){
		sb += "\n "+k+"="+err[k];
		if( k == "code" ){
			sb+=" ";
			switch (err[k]) {
			case FileError.QUOTA_EXCEEDED_ERR: sb += 'QUOTA_EXCEEDED_ERR'; break;
			case FileError.NOT_FOUND_ERR: sb += 'NOT_FOUND_ERR'; break;
			case FileError.SECURITY_ERR: sb += 'SECURITY_ERR'; break;
			case FileError.INVALID_MODIFICATION_ERR: sb += 'INVALID_MODIFICATION_ERR'; break;
			case FileError.INVALID_STATE_ERR: sb += 'INVALID_STATE_ERR'; break;
			};
		}
	}
	return sb;
}

function promiseRequestFileSystem(bPersistent,quota){
	// Tizen 2.2 には window.webkitStorageInfo も window.storageInfo もないようだ
	// APIの名称がwebkitだとちょっと違う
	var requestFileSystem = ( window.webkitRequestFileSystem || window.requestFileSystem );
	var mode = (bPersistent ? window.PERSISTENT : window.TEMPORARY );
	console.log("requestFileSystem="+ dumpObject( requestFileSystem ));
	//
	var d = new $.Deferred;
	requestFileSystem( mode,quota, function(fs){
		d.resolve( fs ); // FileSystem object
	},function(err){
		d.reject(err); // FileError object
	});
	return d.promise();
}

function promiseGetFile( fs, filename,option ){
	var d = new $.Deferred;
	fs.root.getFile( filename,option, function(entry){
		d.resolve(entry); // FileEntry object
	},function(err){
		d.reject(err); // FileError object
	});
	return d.promise();
}

function promiseCreateWriter( entry ){
	var d = new $.Deferred;
	entry.createWriter(function(writer) {
		d.resolve(writer); // FileWriter object
	},function(err){
		d.reject(err); // FileError object
	});
	return d.promise();
}

function promiseWrite( writer, data ){
	var d = new $.Deferred;
	writer.onwriteend = function(){ d.resolve(); }; // no object
	writer.onerror = function(err){ d.reject(err); }; // FileError object
	writer.write(new Blob([ data ]));
	return d.promise();
}

function testFileSave2(){
	// テスト用パラメータ
	var save_file = "file1";
	var save_data = JSON.stringify({ key1: 'v1',key2: 'v2',key3: 'v3'}); 
	var quota = 8 * 1024 * 1024;
	var bPersistent = true;
	//
	promiseRequestFileSystem(bPersistent,quota)
	... ???? 
}

function testFileSave(){
	// テスト用パラメータ
	var save_file = "file1";
	var save_data = JSON.stringify({ key1: 'v1',key2: 'v2',key3: 'v3'}); 
	var quota = 8 * 1024 * 1024;
	var bPersistent = true;
	// Tizen 2.2 には window.webkitStorageInfo も window.storageInfo もないようだ
	// APIの名称がwebkitだとちょっと違う
	var requestFileSystem = ( window.webkitRequestFileSystem || window.requestFileSystem );
	console.log("requestFileSystem="+ dumpObject( requestFileSystem ));
	var mode = (bPersistent ? window.PERSISTENT : window.TEMPORARY );
	//
	requestFileSystem( mode,quota, function(fs){ // class FileSystem
		fs.root.getFile( save_file, {create: true }, function(entry){ // class FileEntry
			entry.createWriter(function(writer) { // class FileWriter
				writer.onwriteend = function(){
					console.log('write completed.');
				};
				writer.onerror = function(err){
					console.log("write error:"+ formatFileError(err) );
				};
				writer.write(new Blob([ save_data ]));
			},function(err){
				console.log("createWriter failed."+formatFileError(err));
			});
		},function(err){
			console.log("getFile failed."+formatFileError(err));
		});
	},function(err){
		console.log("requestFileSystem failed."+formatFileError(err));
	});
}