node.js fs.readFile 中的编码被忽略
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encoding is ignored in fs.readFile
提问by Micha Roon
I am trying to read the contents of a properties file in node. this is my call:
我正在尝试读取 node.js 中的属性文件的内容。这是我的电话：
fs.readFile("server/config.properties", {encoding: 'utf8'}, function(err, data ) {
console.log( data );
});
The console prints a buffer:
控制台打印一个缓冲区：
<Buffer 74 69 74 69 20 3d 20 74 6f 74 6f 0a 74 61 74 61 20 3d 20 74 75 74 75>
when I replace the code with this:
当我用这个替换代码时：
fs.readFile("server/config.properties", function(err, data ) {
console.log( data.toString('utf8') );
});
it works fine. But the node documentationsays the String is converted to utf8 if the encoding is passed in the options
它工作正常。但是节点文档说如果在选项中传递编码，则字符串将转换为 utf8
the output of node --version is v0.10.2
node --version 的输出是 v0.10.2
What am I missing here?
我在这里缺少什么？
thank you for your support
感谢您的支持
回答by Jonathan Lonowski
Depending on the version of Node you're running, the argument may be just the encoding:
根据您运行的 Node 版本，参数可能只是encoding：
fs.readFile("server/config.properties", 'utf8', function(err, data ) {
console.log( data );
});
The 2nd argument changed to optionswith v0.10:
第二个参数更改为optionsv0.10：
- FS
readFile(),writeFile(),appendFile()and their Sync counterparts now take anoptionsobject (but the old API, anencodingstring, is still supported)
- FS
readFile()，writeFile()，appendFile()和他们同行同步，现在需要一个options对象（但旧的API，一个encoding字符串，仍然支持）
For former documentation:
对于以前的文档：
回答by youssouf
You should change {encoding: 'utf8'}to {encoding: 'utf-8'}, for example:
您应该更改{encoding: 'utf8'}为 {encoding: 'utf-8'}，例如：
fs.readFile("server/config.properties", {encoding: 'utf-8'}, function(err, data ) {
console.log( data );
});
