如何在 node.js 中同步读取文件或流？
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How do you read a file or Stream synchronously in node.js?
提问by user949300
Please, no lectures about how I should be doing everything asynchronously. Sometimes I want to do things the easy obvious way, so I can move on to other work.
拜托，没有关于我应该如何异步做所有事情的讲座。有时我想以简单明了的方式做事，这样我就可以继续做其他工作。
For some reason, the following code doesn't work. It matches code I found on a recent SO question. Did node change or break something?
出于某种原因，以下代码不起作用。它匹配我在最近的一个SO question上找到的代码。节点是否改变或破坏了什么？
var fs = require('fs');
var rs = fs.createReadStream('myfilename'); // for example
// but I might also want to read from
// stdio, an HTTP request, etc...
var buffer = rs.read(); // simple for SCCCE example, normally you'd repeat in a loop...
console.log(buffer.toString());
After the read, the buffer is null.
读取后，缓冲区为空。
Looking at rs in the debugger, I see
在调试器中查看 rs，我看到
events
has end and open functions, nothing else
_readableState
buffer = Array[0]
emittedReadable = false
flowing = false <<< this appears to be correct
lots of other false/nulls/undefined
fd = null <<< suspicious???
readable = true
lots of other false/nulls/undefined
回答by Bulkan
To read the contents of a file synchronously use fs.readFileSync
要同步读取文件的内容，请使用fs.readFileSync
var fs = require('fs');
var content = fs.readFileSync('myfilename');
console.log(content);
fs.createReadStreamcreates a ReadStream.
