使用FileSystem Api在Javascript中写入文件 [英] Writing to a file in Javascript using FileSystem Api

问题描述

我试图在Chrome中使用FileSystem API写入本地文件系统。我在执行

时出现以下错误：不推荐使用FileError。请使用DOMError的'name'或'message'属性而不是'code'。

  window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem; 
 
 var fs = null; 
 
函数errorHandler（e）{
 alert（hi）; 
 var msg =''; 
 switch（e.code）{//错误报告在这里
 case FileError.QUOTA_EXCEEDED_ERR：
 msg ='QUOTA_EXCEEDED_ERR'; 
休息; 
 case FileError.NOT_FOUND_ERR：
 msg ='NOT_FOUND_ERR'; 
休息; 
 case FileError.SECURITY_ERR：
 msg ='SECURITY_ERR'; 
休息; 
 case FileError.INVALID_MODIFICATION_ERR：
 msg ='INVALID_MODIFICATION_ERR'; 
休息; 
 case FileError.INVALID_STATE_ERR：
 msg ='INVALID_STATE_ERR'; 
休息; 
默认值：
 msg ='未知错误'; 
休息; 
 
 
 
函数onInitFs（fs）{
 alert（hi）; 
 
 fs.root.getFile（'log.txt'，{create：true}，function（fileEntry）{
 
 //为FileEntry创建一个FileWriter对象.txt）。
 fileEntry.createWriter（function（fileWriter）{
 
 fileWriter.onwriteend = function（e）{
 console.log（'Write completed。'）; 
}; 
 
 fileWriter.onerror = function（e）{
 console.log（'Write failed：'+ e.toString（））; 
}; 
 
 //创建一个新的Blob并将其写入log.txt。
 var blob = new Blob（['Add some text']，{type：'text / plain'}）; 
 
 fileWriter.write（blob）; 
}，errorHandler）; 
}，errorHandler）; 
 
 
函数initFS（）{
 window.requestFileSystem（window.TEMPORARY，1024 * 1024，onInitFs，errorHandler）; 
 
 
 if（window.requestFileSystem）{
 initFS（）; 
} 
  

由于我知道执行过程会转到 errorHandler 方法我假设我在调用 requestFileSystem（）方法时出错。我非常感谢这里的帮助。在此先感谢

进一步的研究表明，它会因安全错误而失败。我怎么基本上绕过这个

解决方案

好像你的errorHandler没有用msg做任何事情。试试这个：

  function errorHandler（e）{console.log（ERROR !: name：[+ e.name + ] message：[+ e.message +]）; } 
  

I am trying to write to local file system using FileSystem API in Chrome. I am getting the following error while executing

FileError is deprecated. Please use the 'name' or 'message' attributes of DOMError rather than 'code'.

window.requestFileSystem = window.requestFileSystem || window.webkitRequestFileSystem;

var fs = null;

function errorHandler(e) {
  alert("hi");
  var msg = '';
  switch (e.code) {    //Error is being reported here
    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;
  }
}

function onInitFs(fs) {
  alert("hi");

  fs.root.getFile('log.txt', {create: true}, function(fileEntry) {

    // Create a FileWriter object for our FileEntry (log.txt).
    fileEntry.createWriter(function(fileWriter) {

      fileWriter.onwriteend = function(e) {
        console.log('Write completed.');
      };

      fileWriter.onerror = function(e) {
        console.log('Write failed: ' + e.toString());
      };

      // Create a new Blob and write it to log.txt.
      var blob = new Blob(['Add some text'], {type: 'text/plain'});

      fileWriter.write(blob);
    }, errorHandler);
  }, errorHandler);
}

function initFS(){
  window.requestFileSystem(window.TEMPORARY, 1024*1024, onInitFs, errorHandler);
}

if (window.requestFileSystem) {
  initFS();
}

And since i know the execution goes to errorHandler method i assume i am doing something wrong while calling the requestFileSystem() method. I would really appreciate help here. Thanks in advance

Further research shows that it fails with security error. How do i basically bypass that

解决方案

Seems like your errorHandler wasn't doing anything with msg anyway. Try this:

function errorHandler(e) {  console.log("ERROR!: name: [" + e.name + "] message: [" + e.message + "]");  }

这篇关于使用FileSystem Api在Javascript中写入文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！