我想在本地运行 firebase http 云函数来访问真正的远程 firestore 数据库。
为此，我使用以下命令在本地运行我的函数：
FIREBASE_CONFIG="/path-to-credential.json" GOOGLE_APPLICATION_CREDENTIALS="/path-to-credential.json" firebase emulators:start --only functions
正如这里所写的https://firebase.google.com/docs/admin/setup https://firebase.google.com/docs/admin/setup，这应该允许在没有任何参数的情况下初始化 admin sdk。我的职能index.js如下
import * as admin from 'firebase-admin';
import * as fromHttpFunc from './http/func';
admin.initializeApp();
export const httpFunc = fromHttpFunc.httpFunc;
当我在浏览器中调用该函数时，这就是我在日志中得到的内容
[warn] ⚠ The Cloud Firestore emulator is not running so database operations will fail with a 'default credentials' error.
[debug] [2019-07-20T13:16:28.656Z] [runtime-status] Ephemeral server survived. {}
[info] > (node:41939) UnhandledPromiseRejectionWarning: Error: The incoming JSON object does not contain a client_email field
[info] > at JWT.fromJSON (/Users/michele/dev/clubup/backoffice/firebase/functions/node_modules/google-auth-library/build/src/auth/jwtclient.js:165:19)
[info] > at GoogleAuth.fromJSON (/Users/michele/dev/clubup/backoffice/firebase/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:294:16)
[info] > at GoogleAuth.getClient (/Users/michele/dev/clubup/backoffice/firebase/functions/node_modules/google-auth-library/build/src/auth/googleauth.js:476:52)
[info] > at GrpcClient._getCredentials (/Users/michele/dev/clubup/backoffice/firebase/functions/node_modules/google-gax/build/src/grpc.js:107:40)
[info] > at GrpcClient.createStub (/Users/michele/dev/clubup/backoffice/firebase/functions/node_modules/google-gax/build/src/grpc.js:223:34)
[info] > at new FirestoreClient (/Users/michele/dev/clubup/backoffice/firebase/functions/node_modules/@google-cloud/firestore/build/src/v1/firestore_client.js:128:39)
[info] > at ClientPool.Firestore._clientPool.pool_1.ClientPool [as clientFactory] (/Users/michele/dev/clubup/backoffice/firebase/functions/node_modules/@google-cloud/firestore/build/src/index.js:315:26)
[info] > at ClientPool.acquire (/Users/michele/dev/clubup/backoffice/firebase/functions/node_modules/@google-cloud/firestore/build/src/pool.js:61:35)
[info] > at ClientPool.run (/Users/michele/dev/clubup/backoffice/firebase/functions/node_modules/@google-cloud/firestore/build/src/pool.js:114:29)
[info] > at Firestore.readStream (/Users/michele/dev/clubup/backoffice/firebase/functions/node_modules/@google-cloud/firestore/build/src/index.js:995:26)
[info] > (node:41939) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 3)
[info] > (node:41939) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
[warn] ⚠ Your function timed out after ~60s. To configure this timeout, see
https://firebase.google.com/docs/functions/manage-functions#set_timeout_and_memory_allocation.
[warn] ⚠ Your function timed out after ~60s. To configure this timeout, see
https://firebase.google.com/docs/functions/manage-functions#set_timeout_and_memory_allocation.
我不明白出了什么问题，我还通过执行以下操作检查了凭证的路径是否正确cat /path-to-credential.json我有一个 jsonclient_email field.
通过确保以下几点，设法让本地云功能与真正的远程数据库一起工作：
run firebase login并登录到您要使用的项目
关注此评论https://github.com/firebase/firebase-functions/issues/121#issuecomment-337065268 https://github.com/firebase/firebase-functions/issues/121#issuecomment-337065268确保该文件不存在（我有一个invalid_grant error)
run export GOOGLE_APPLICATION_CREDENTIALS="SERVICE_ACCOUNT_PATH.json"在您要使用的终端会话中（替换 SERVICE_ACCOUNT_PATH）
不使用以下方式为您的 http 功能提供服务firebase emulators:start --only functions但使用firebase serve --only functions。目前，这是一种未记录的行为：https://github.com/firebase/firebase-tools/issues/1412#issuecomment-504561828 https://github.com/firebase/firebase-tools/issues/1412#issuecomment-504561828.
-
按如下方式初始化应用程序（更新 YOUR_APP_ID）：
admin.initializeApp({
credential: admin.credential.applicationDefault()
});
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