自动在Firefox中保存文件 [英] Auto Save a file in Firefox

问题描述

我试图找到一种方法，我们可以使用JS在Firefox中自动保存文件。在Windows桌面上使用FireShot的方式：

  var element = content.document.createElement（FireShotDataElement ）; 
 element.setAttribute（Entire，EntirePage）; 
 element.setAttribute（Action，Action）; 
 element.setAttribute（Key，Key）; 
 element.setAttribute（BASE64Content，）; 
 element.setAttribute（Data，Data）; 
 element.setAttribute（Document，content.document）; 
 if（typeof（CapturedFrameId）！=undefined）
 element.setAttribute（CapturedFrameId，CapturedFrameId）; 
 content.document.documentElement.appendChild（element）; 
 var evt = content.document.createEvent（Events）; 
 evt.initEvent（capturePageEvt，true，false）; 
 element.dispatchEvent（evt）; 
  

但问题在于它会打开一个对话框来确认本地驱动器的位置细节。有没有办法我可以硬编码本地驱动器的存储位置，并自动保存文件？

然后 FileUtils 和 NetUtil.asyncCopy 是您的好友：

  Components.utils.import（resource：//gre/modules/FileUtils.jsm）; 
 Components.utils.import（resource：//gre/modules/NetUtil.jsm）; 
 
 var TEST_DATA =这是一个测试字符串; 
 var source = Components.classes [@ mozilla.org/io/string-input-stream; 1]。 
 createInstance（Components.interfaces.nsIStringInputStream）; 
 source.setData（TEST_DATA，TEST_DATA.length）; 
 
 var file = new FileUtils.File（c：\\foo\\\\ bar.txt）; 
 var sink = file.openSafeFileOutputStream（file，FileUtils.MODE_WRONLY | 
 FileUtils.MODE_CREATE）; 
 NetUtil.asyncCopy（source，sink）; 
  

这将异步写入字符串，这是一个测试字符串放入文件 c：\foo\bar.txt 中。请注意， NetUtil.asyncCopy 会自动关闭这两个流，您不需要这样做。但是，您可能希望将一个函数作为第三个参数传递给此方法 - 写入操作完成时将调用它。

另请参阅：代码片断，写入文件

I am trying to find a way where by we can auto save a file in Firefox using JS. The way I have done till yet using FireShot on a Windows Desktop:

var element = content.document.createElement("FireShotDataElement");
element.setAttribute("Entire", EntirePage);
element.setAttribute("Action", Action);
element.setAttribute("Key", Key);
element.setAttribute("BASE64Content", "");
element.setAttribute("Data", Data);
element.setAttribute("Document", content.document);
if (typeof(CapturedFrameId) != "undefined")
  element.setAttribute("CapturedFrameId", CapturedFrameId);
content.document.documentElement.appendChild(element);
var evt = content.document.createEvent("Events");
evt.initEvent("capturePageEvt", true, false);
element.dispatchEvent(evt);

But the issue is that it opens a dialog box to confirm the local drive location details. Is there a way I can hard code the local drive storage location and auto save the file?

解决方案

If you are creating a Firefox add-on then FileUtils and NetUtil.asyncCopy are your friends:

Components.utils.import("resource://gre/modules/FileUtils.jsm");
Components.utils.import("resource://gre/modules/NetUtil.jsm");

var TEST_DATA = "this is a test string";
var source = Components.classes["@mozilla.org/io/string-input-stream;1"].
                 createInstance(Components.interfaces.nsIStringInputStream);
source.setData(TEST_DATA, TEST_DATA.length);

var file = new FileUtils.File("c:\\foo\\bar.txt");
var sink = file.openSafeFileOutputStream(file, FileUtils.MODE_WRONLY |
                                               FileUtils.MODE_CREATE);
NetUtil.asyncCopy(source, sink);

This will asynchronously write the string this is a test string into the file c:\foo\bar.txt. Note that NetUtil.asyncCopy closes both streams automatically, you don't need to do it. However, you might want to pass a function as third parameter to this method - it will be called when the write operation is finished.

See also: Code snippets, writing to a file

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