Koa Typescript应用程序会挂在任何Firebase数据库调用上 [英] Koa Typescript app hangs on any Firebase db call

问题描述

我有一个简单的 koa REST 服务，该服务以 typescript 编写，具有 GET 请求，只需返回所有db ref /user 的 firebase数据库中的用户.

I have a simple koa REST service wrote in typescript that has a GET request the simply returns all users from a firebase database at db ref /user.

应用程序接收到该请求并获得了数据库引用，但是在应获取该值时它会永久挂起.

The request gets received by the app and it gets the database reference, but it hangs forever when it should get the value.

这是我的 index.ts 文件:

import * as Koa from "koa";
import * as Router from "koa-router";
import * as json from "koa-json";
import * as bodyParser from "koa-bodyparser";
import firebase from "firebase";
import { config } from "./config";

const app = new Koa();
const router = new Router();

router.get("/users", async (ctx, next) => {
  firebase.initializeApp(config.firebaseConfig);
  const db = firebase.database();

  const ref = db.ref("user");
  console.log("got ref");

  const snapshot = await ref.once("value");
  console.log("got snapshot");

  ctx.body = { users: snapshot.val() };

  await next();
});

app.use(json());
app.use(bodyParser());

app.use(router.routes()).use(router.allowedMethods());
app.listen(3000, () => {
  console.log("Koa started on port 3000");
});

这是输出:

Koa started on port 3000
  <-- GET /users
got ref
[2021-02-21T10:09:03.818Z]  @firebase/database: FIREBASE WARNING: Namespace [masked-my-project]-dev-default-rtdb lives in a different region. Please change your database URL to https://[masked-my-project]-dev-default-rtdb.europe-west1.firebasedatabase.app (https://[masked-my-project]-dev-default-rtdb.firebaseio.com/)

这是我的 tsconfig.json :

{
  "version": "2.0.2",
  "compilerOptions": {
    "outDir": "./dist",
    "lib": ["ES5", "ES6"],
    "noImplicitReturns": true,
    "sourceMap": true,
    "target": "ES6",
    "module": "commonjs",
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true
  },
  "include": ["./src/**/*"],
  "files": ["node_modules/typescript/lib/lib.es6.d.ts"],
  "exclude": ["node_modules"]
}

package.json :

{
  "name": "koa-new",
  "version": "1.0.0",
  "description": "",
  "main": "dist/index.js",
  "scripts": {
    "dev": "./node_modules/.bin/tsc-watch --onSuccess \"node .\"",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "dotenv": "^8.2.0",
    "firebase": "^8.2.9",
    "koa": "^2.13.1",
    "koa-bodyparser": "^4.3.0",
    "koa-json": "^2.0.2",
    "koa-logger": "^3.2.1",
    "koa-route": "^3.2.0",
    "koa-router": "^10.0.0",
    "ts-node": "^9.1.1",
    "typescript": "^4.1.5"
  },
  "devDependencies": {
    "@types/dotenv": "^8.2.0",
    "@types/firebase": "^3.2.1",
    "@types/koa": "^2.13.0",
    "@types/koa-bodyparser": "^4.3.0",
    "@types/koa-json": "^2.0.18",
    "@types/koa-logger": "^3.1.1",
    "@types/koa-router": "^7.4.1",
    "@types/node": "^14.14.31",
    "tsc-watch": "^4.2.9"
  }
}

.env :

FIREBASE_API_KEY=[mask]
FIREBASE_AUTH_DOMAIN=[mask].firebaseapp.com
FIREBASE_DATABASE_URL=https://[mask]-default-rtdb.europe-west1.firebasedatabase.app
FIREBASE_PROJECT_ID=[mask]
FIREBASE_STORAGE_BUCKET=[mask].appspot.com
FIREBASE_MESSAGING_SENDER_ID=[mask]
FIREBASE_APP_ID=1:[mask]:web:[mask]
FIREBASE_MEASUREMENT_ID=[mask]

推荐答案

问题是 firebaseConfig 在名为 databaseUrl 而不是的属性中具有数据库url.databaseURL 并且由于"Url"不是大写的firebase，以为我忘了添加它，并且默认为 https://[masked-my-project] -dev-default-rtdb.firebaseio.com/，而它需要为https://[masked-my-project] -dev-default-rtdb.europe-west1.firebasedatabase.app ，因此出现错误消息.

The problem was that firebaseConfig had the db url in a property named databaseUrl instead of databaseURL and because of "Url" not being uppercased firebase thought I forgot to add it and defaulted to https://[masked-my-project]-dev-default-rtdb.firebaseio.com/ whereas it needed to be https://[masked-my-project]-dev-default-rtdb.europe-west1.firebasedatabase.app therefore the error message.

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