调用FileSystemAPI在本地沙盒中创建文件，代码如下:

 readerFile:function(file,callBack){
            fileSystemObj.fs.root.getFile(file, {create: true}, function(fileEntry) {   
                console.log(3);
                fileEntry.file(function(file) {
                    console.log(4);
                    var reader = new FileReader();
                    reader.onloadend = function() {
                        typeof callBack == 'function' && callBack.call(fileEntry,this.result);
                    };
                    reader.readAsText(file);
                }, fileSystemObj.errorHandler);
            }, fileSystemObj.errorHandler);
        },
        initialize  : function(filename) {
            window.requestFileSystem(TEMPORARY, this.size, function (fs) {
                fileSystemObj.fs = fs;
                fileSystemObj.readerFile(filename,function(text){
                    console.log(text);
                });
            })
        }
    };
    
     if(window.requestFileSystem) {
        navigator.webkitTemporaryStorage.queryUsageAndQuota(function (usage, quota) {
            if (!quota) {
                console.log(1);
                navigator.webkitTemporaryStorage.requestQuota(fileSystemObj.size, function () {
                    fileSystemObj.initialize();
                }, fileSystemObj.errorHandler);
            }else{
                console.log(2)
                fileSystemObj.initialize();
            }
        });
    }else{
        alert("请使用chrome浏览器浏览!");
    }
}

控制台下报错:

2
sandbox_fileSystem.js:23 SecurityError
DOMException: It was determined that certain files are unsafe for access within a Web application, or that too many calls are being made on file resources.

请问各位码友如何解决？