从node.js中的stdin读取并阻止

Question

How can I have our node.js application halt/block, waiting on stdin before running the rest of the code? I have:

var readline = require('readline');

var rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

var ECRYPTION_KEY;
rl.question('Provide the global encryption key:', function(encyrptionKey) {
    ECRYPTION_KEY = encyrptionKey;
    rl.close();
});

var https = require('https');

https.createServer({ ... });
console.log("https server running...");

Right now, I see Provide the global encryption key: and also https server running.. immediately. IE does not block and wait on stdin before creating the https server.

Answer 1

在从rl回调接收到加密密钥之前，正在创建服务器。

Answer 2

You cannot do that. Ever. Node.js is designed to run without blocking all the time, and waiting for stdin to do something is a misuse.

PS: Actually you can (with fibers) but it is not a good reason to use them.

adeneo's advice is right, just put createServer function inside your callback.