Question

这是我的应用app.js：

var express=        require("express");

var app=    express();
app.get('/',function(req,res){
    console.log(req);
    res.send("Hello world");
});

app.get('*', function(req, res){
  res.send("Nothing to see here.", 404);
});

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

当我在本地运行nodejs app.js时，这可以按预期工作。我可以转到localhost:3000并查看Hello world，但是当我将其推送到Heroku时，我会在日志中找到它：

2016-10-25T03:37:09.449732+00:00 heroku[web.1]: Starting process with command `node app.js`
2016-10-25T03:37:11.207319+00:00 app[web.1]: /app/app.js:47
2016-10-25T03:37:11.207341+00:00 app[web.1]:    var host=   server.address().address;
2016-10-25T03:37:11.207342+00:00 app[web.1]:                                ^
2016-10-25T03:37:11.207343+00:00 app[web.1]: 
2016-10-25T03:37:11.207343+00:00 app[web.1]: ReferenceError: server is not defined
2016-10-25T03:37:11.207344+00:00 app[web.1]:     at Server.<anonymous> (/app/app.js:47:28)
2016-10-25T03:37:11.207345+00:00 app[web.1]:     at Server.g (events.js:291:16)
2016-10-25T03:37:11.207345+00:00 app[web.1]:     at emitNone (events.js:86:13)
2016-10-25T03:37:11.207346+00:00 app[web.1]:     at Server.emit (events.js:185:7)
2016-10-25T03:37:11.207346+00:00 app[web.1]:     at emitListeningNT (net.js:1278:10)
2016-10-25T03:37:11.207347+00:00 app[web.1]:     at _combinedTickCallback (internal/process/next_tick.js:71:11)
2016-10-25T03:37:11.207348+00:00 app[web.1]:     at process._tickCallback (internal/process/next_tick.js:98:9)
2016-10-25T03:37:11.207349+00:00 app[web.1]:     at Module.runMain (module.js:592:11)
2016-10-25T03:37:11.207349+00:00 app[web.1]:     at run (bootstrap_node.js:394:7)
2016-10-25T03:37:11.207350+00:00 app[web.1]:     at startup (bootstrap_node.js:149:9)
2016-10-25T03:37:11.287706+00:00 heroku[web.1]: State changed from starting to crashed
2016-10-25T03:37:11.290415+00:00 heroku[web.1]: Process exited with status 1

这里发生了什么？

Answer 1

您在此处显示的内容没有定义变量'server'。不知道为什么它在本地工作，但没有理由它应该工作。

发布你的完整app.js和你的package.json，这可能会帮助我们更具体。

Heroku Node.js错误：ReferenceError：未定义服务器

1 个答案: