Question

我一直在尝试用Heroku进行MEAN应用程序，但是我遇到了这个错误。我不知道这是什么问题...我需要一些帮助。我寻找许多解决方案。但是我有同样的错误。而且我还附上了我的git。 https://github.com/handsomehyunsu/resume/tree/heroku 谢谢。

2020-11-08T08:59:22.685557+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=hyunsukimresume.herokuapp.com request_id=51fc6ab7-2c9d-431c-b8a2-2a7a82ce79c3 fwd="14.50.155.250" dyno= connect= service= status=503 bytes= protocol=https
2020-11-08T08:59:23.143224+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=hyunsukimresume.herokuapp.com request_id=b9cb9676-fd30-4987-9a48-3bf71fa095a3 fwd="14.50.155.250" dyno= connect= service= status=503 bytes= protocol=https

Procfile

web: node server.js

package.json

{
  "name": "my-resume",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "node server.js",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e",
    "dev": "nodemon server.js",
    "postinstall": "ng build --output-path dist"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^10.1.6",
    "@angular/cdk": "^10.2.7",
    "@angular/common": "~10.1.5",
    "@angular/compiler": "~10.1.5",
    "@angular/core": "~10.1.5",
    "@angular/forms": "~10.1.5",
    "@angular/material": "^10.2.7",
    "@angular/platform-browser": "~10.1.5",
    "@angular/platform-browser-dynamic": "~10.1.5",
    "@angular/router": "~10.1.5",
    "bcryptjs": "^2.4.3",
    "body-parser": "^1.19.0",
    "bootstrap": "^4.5.3",
    "express": "^4.17.1",
    "jsonwebtoken": "^8.5.1",
    "mongoose": "^5.10.11",
    "mongoose-unique-validator": "^2.0.3",
    "rxjs": "~6.6.0",
    "tslib": "^2.0.0",
    "zone.js": "~0.10.2"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.1001.6",
    "@angular/cli": "~10.1.6",
    "@angular/compiler-cli": "~10.1.5",
    "@types/jasmine": "~3.5.0",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^12.11.1",
    "codelyzer": "^6.0.0",
    "jasmine-core": "~3.6.0",
    "jasmine-spec-reporter": "~5.0.0",
    "karma": "~5.0.0",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage-istanbul-reporter": "~3.0.2",
    "karma-jasmine": "~4.0.0",
    "karma-jasmine-html-reporter": "^1.5.0",
    "nodemon": "^2.0.6",
    "protractor": "~7.0.0",
    "ts-node": "~8.3.0",
    "tslint": "~6.1.0",
    "typescript": "~4.0.2"
  },
  "engines": {
    "node": "~10.16.3",
    "npm": "~6.14.8"
  }
}

server.js

const { debug } = require('console');
const http = require('http');
const app = require('./backend/app');

const normalizePort = val => {
    var port = parseInt(val, 10);

    if(isNaN(port)){
        //named pipe
        return val;
    }

    if(port >= 0){
        //port number
        return port;
    }
    
    return false;
};

const onError = error => {
    if(error.svscall !== "listen"){
        throw error;
    }
    const bind = typeof addr === "string" ? "pipe " + addr : "port " + port;
    switch(error.code){
        case "EACCES":
            console.log(bind + " requires elevated privileges");
            process.exit(1);
            break;
        case "EADDRINUSE":
            console.log(bind + " is already in use");
            process.exit(1);
            break;
        default:
            throw error;
    }
};

const onListening = () => {
    const addr = server.address();
    const bind = typeof addr === "string" ? "pipe " + addr : "port " + port;
    debug("Listening on " + bind);
};

const port = normalizePort(process.env.PORT || "3000");
app.set("port", port);

const server = http.createServer(app);
server.on("error", onError);
server.on("listening", onListening);
server.listen(port);

backend / app.js

const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require("mongoose");

const postsRoutes = require('./routes/posts');
const userRoutes = require('./routes/user');

const app = express();

//mongodb connect
mongoose.connect("mongodb+srv://test_username:" + process.env.MONGO_ATLAS_PW + "@cluster0.utmlm.mongodb.net/myResume?retryWrites=true&w=majority")
    .then(() => {
        console.log('connected to database!!');
    })
    .catch(() => {
        console.log('connection failed');
    })

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

//CORS 
app.use((req, res, next) => {
    res.setHeader("Access-Control-Allow-Origin", "*");
    res.setHeader(
      "Access-Control-Allow-Headers",
      "Origin, X-Requested-With, Content-Type, Accept, Authorization"
    );
    res.setHeader(
      "Access-Control-Allow-Methods",
      "GET, POST, PATCH, PUT, DELETE, OPTIONS"
    );
    next();
  });


app.use("/posts", postsRoutes);
app.use("/user", userRoutes);


module.exports = app;

Answer 1

Heroku H10-App崩溃可能是由于很多原因，所以我会尽力列出它们，您可以尝试检查它们。

如果您的服务器位于server.js中，并且您的Procfile指向app.js，则肯定会使您的应用程序崩溃
将PORT设置为Heroku环境变量将使您的应用程序崩溃。 Heroku自动设置一个可通过process.env.PORT访问的端口。自己设置端口会使您的应用程序崩溃。

尝试编辑server.js文件只需const server = http.createServer(process.env.PORT || 3000);来启动服务器，请跳过normalizePort

如果不能解决问题，则可能是您缺少必需的环境变量。

最后但并非最不重要的一点是，如果上述所有方法都不能帮助您尝试在package.json文件的引擎部分中设置节点版本。像这样

例如：

{
 "name": "myapp",
 "description": "a really cool app",
 "version": "1.0.0",
 "engines": {
   "node": "12.11.1",
   "npm":  "6.14.8"
   }
}

at =错误代码= H10 desc =“应用程序崩溃”方法=获取路径=“ /”

1 个答案: