gistfile1.js

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;
}

if( ! Function.prototype.bind ){
	Function.prototype.bind = function(oThis){
		if( typeof this !== "function" ){
			// closest thing possible to the ECMAScript 5 internal IsCallable function
			throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
		}
		var aArgs = Array.prototype.slice.call(arguments, 1)
		,fToBind = this
		,fNOP = function () {}
		,fBound = function () {
			return fToBind.apply(
				(this instanceof fNOP && oThis ? this : oThis)
				, aArgs.concat(Array.prototype.slice.call(arguments))
			);
		};
		fNOP.prototype = this.prototype;
		fBound.prototype = new fNOP();
		return fBound;
	};
}

function testFileSave2(){
	// テスト用パラメータ
	var file_name = "file1";
	var file_option = {create:true};
	var file_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 );
	var mode = (bPersistent ? window.PERSISTENT : window.TEMPORARY );
	//
	Deferred.next(function(){
		var d = new Deferred();
		requestFileSystem(mode,quota, function(fs){
			d.call( fs );
		},d.fail.bind(d));
		return d; 
		// success FileSystem or fail FileError
	}).next(function(fs){
		var d = new Deferred();
		fs.root.getFile( file_name,file_option, d.call.bind(d), d.fail.bind(d) );
		return d; 
		// success FileEntry or fail FileError
	}).next(function(entry){
		var d = new Deferred();
		entry.createWriter( d.call.bind(d), d.fail.bind(d) );
		return d; 
		// success FileWriter or fail FileError
	}).next(function(writer){
		var d = new Deferred();
		writer.onwriteend = d.call.bind(d);
		writer.onerror = d.fail.bind(d);
		writer.write(new Blob([ file_data ]));
		return d; 
		// success undefined or fail FileError
	}).next(function(){
		console.log("write complete!");
	}).error(function(err){
		console.log( formatFileError(err) );
	});
}