将stdout重定向到文件node.js [英] Redirecting stdout to file nodejs

问题描述

我创建了:

var access = fs.createWriteStream('/var/log/node/api.access.log', { flags: 'w' });

然后通过管道传输:

process.stdout.pipe(access);

然后尝试:

console.log("test");

/var/log/node/api.access.log中没有任何内容.但是这种方式有效:

And nothing has appeared in /var/log/node/api.access.log. However this way is working:

process.stdout.pipe(access).write('test');

有人可以解释我在做什么错吗?

Could someone explain what am I doing wrong ?

推荐答案

我通过以下方式解决了这个问题:

I solved this problem the following way:

var access = fs.createWriteStream('/var/log/node/api.access.log');
process.stdout.write = process.stderr.write = access.write.bind(access);

当然，如果需要，您也可以将stdout和stderr分开.

Of course you can also separate stdout and stderr if you want.

我也强烈建议处理未捕获的异常:

I also would strongly recommend to handle uncaught exceptions:

process.on('uncaughtException', function(err) {
  console.error((err && err.stack) ? err.stack : err);
});

这将涵盖以下情况:

• process.stdout.write
• process.stderr.write
• console.log
• console.dir
• console.error
• someStream.pipe(process.stdout);
• 抛出新的错误(崩溃")；
• 抛出从不这样做"；
• 未定义；

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