Heroku cedar 堆栈上的 Node.js 端口问题

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我正在 Node.js 中运行一个基本的 Express 应用程序并尝试部署到 Heroku.该应用程序在本地运行良好，我相信我在 Heroku 上的设置一直运行良好，直到启动服务器时出现以下错误:

I'm running a basic Express app in Node.js and trying to deploy to Heroku. The app works fine locally and I believe my setup with Heroku has gone well up until starting the server where i get the following error:

2011-09-21T16:42:36+00:00 heroku[web.1]: State changed from created to starting 2011-09-21T16:42:39+00:00 app[web.1]: Express server listening on port 3000 in production mode 2011-09-21T16:42:40+00:00 heroku[web.1]: Error R11 (Bad bind) -> Process bound to port 3000, should be 12810 (see environment variable PORT) 2011-09-21T16:42:40+00:00 heroku[web.1]: Stopping process with SIGKILL 2011-09-21T16:42:40+00:00 heroku[web.1]: Process exited

这是目前我在 app.js 中的全部

this is currently all i have in my app.js

app.listen(3000);

我也按照 Heroku 的入门指南中提到的那样运行了它.

I did also run this as mentioned on Heroku's getting started.

$ heroku config:add NODE_ENV=production Adding config vars: NODE_ENV => production

我相信我只需要设置用于生产的端口?谢谢.

I believe I just need to set up the port for production? Thanks.

推荐答案

你能展示你调用 listen 的整个代码部分吗?您应该检查流程环境变量 PORT，而不仅仅是将其硬编码为 3000.来自他们的 docs:

Can you show the entire section of code where you call listen? You should be checking for the process environment variable PORT, not just hardcoding it to 3000. From their docs:

var port = process.env.PORT || 3000; app.listen(port, function() {