如何使用Firefox插件从硬盘读取/写入文件？

问题描述

有没有可能开发一个Firefox插件，可以从硬盘读取/写入文件？我应该使用什么样的代码？

解决方案

这只是链接@Hypnos和@ephemient中的代码的复制（和组合） / p>

  const {Cc，Ci} = require（chrome）; 
 
 //为文件
创建正确的路径var theFile ='d：\\q.txt'; 
 //创建文件写入组件
 var file = Cc [@ mozilla.org/file/local;1\"].createInstance(Ci.nsILocalFile）; 
 file.initWithPath（theFile）; 
 if（file.exists（）== false）//检查文件是否存在
 {
 file.create（Ci.nsIFile.NORMAL_FILE_TYPE，420）; 
} 
 var foStream = Cc [@ mozilla.org/network/file-output-stream;1\"].createInstance(Ci.nsIFileOutputStream）; 
 //使用0x02 | 0x10打开文件进行追加。 
 //foStream.init（文件，0x02 | 0x10，0666，0）; 
 foStream.init（文件，0x02 | 0x08 | 0x20,0666,0）; 
 
 //如果你确定在数据中永远不会有任何非ASCII文本，你可以
 //直接调用foStream.write（data，data.length）
 var converter = Cc [@ mozilla.org/intl/converter-output-stream;1\"].createInstance(Ci.nsIConverterOutputStream）; 
 converter.init（foStream，UTF-8，0，0）; 
 converter.writeString（'这是死亡，你是谁？'）; 
 converter.close（）; //关闭foStream 
  

Is it possible to develop a Firefox addon that can read/write a file from hard disk? What code should I use?

解决方案

it's just copy (and combination ) of code in links @Hypnos and @ephemient provided:

const {Cc,Ci} = require("chrome");

//create proper path for file
var theFile = 'd:\\q.txt';
//create component for file writing
var file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
file.initWithPath( theFile );
if(file.exists() == false) //check to see if file exists
{
    file.create( Ci.nsIFile.NORMAL_FILE_TYPE, 420);
}
var foStream = Cc["@mozilla.org/network/file-output-stream;1"].createInstance(Ci.nsIFileOutputStream);
// use 0x02 | 0x10 to open file for appending.
//foStream.init(file, 0x02 | 0x10, 0666, 0);
foStream.init(file, 0x02 | 0x08 | 0x20, 0666, 0);

// if you are sure there will never ever be any non-ascii text in data you can
// also call foStream.write(data, data.length) directly
var converter = Cc["@mozilla.org/intl/converter-output-stream;1"].createInstance(Ci.nsIConverterOutputStream);
converter.init(foStream,"UTF-8", 0, 0);
converter.writeString('Hi, This is Death. Who are you?');
converter.close(); // this closes foStream

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