Heroku雪松堆栈上的Node.js端口问题 [英] Node.js port issue on Heroku cedar stack

问题描述

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。该应用程序在本地工作正常，我相信我的设置与Heroku已经很好，直到启动服务器，我得到以下错误：

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

目前我所有的我的app.js

this is currently all i have in my app.js

app.listen(3000);

我也按照Heroku开始提到的那样运行。

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端口进行生产？谢谢。

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

推荐答案

您可以显示整个代码段，您调用 listen ？您应该检查过程环境变量PORT，而不仅仅是将其硬编码为3000.从他们的 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() {

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