Firebase Admin SDK，用于下载/检索Google Cloud Storage上的文件 [英] Firebase Admin SDK to download/retrieve files on Google Cloud Storage

问题描述

我正在尝试下载一些已上传到Google Cloud Storage的图像(也称为存储桶).我无法在任何const storage或const bucket上使用.ref()方法，因为它们是管理SDK的一部分. admin.storage仅具有方法.bucket()( https ://firebase.google.com/docs/reference/admin/node/admin.storage.Storage ).

I'm trying to download some images that I have uploaded to my Google Cloud Storage (aka into buckets). I'm unable to use the .ref() method on any of my const storage or const bucket because they are part of the admin SDK. The admin.storage has only the method .bucket() (https://firebase.google.com/docs/reference/admin/node/admin.storage.Storage).

我可以访问这些存储桶. bucket.getFiles()起作用，结果是带有大量元数据(例如文件名，存储桶所有者等)的文件数组对象.如何从云存储中获取图像并将其插入html对象?

I'm able to access the buckets. bucket.getFiles() works, and the result comes out to be an Array of Files objects with a ton of metadata (like file name, bucket owner, etc.). How can I get my images from the cloud storage and insert them into html objects?

var admin = require("firebase-admin");

var serviceAccount = require("./randomDB-f12d3-admin-correctly-working.json");

admin.initializeApp({
  credential: admin.credential.cert(serviceAccount),
  databaseURL: "https://randomDB-f12d3.firebaseio.com",
  storageBucket: "randomDB-f12d3.appspot.com"
});

const gcs  = require("@google-cloud/storage");
gcs.projectId = "randomDB-f12d3";
gcs.keyFilename = "randomDB-f12d3-firebase-admin-correctly-working.json";

exports.getFile = functions.https.onRequest((req, res) => {
  
  cors(req, res, () => {
    if (req.method !== "GET") {
      return res.status(500).json({
        message: "Not allowed"
      });
    }

    const storage = admin.storage();
    const bucket = admin.storage().bucket();

    bucket.getFiles().then((result)=>{
      
      console.log(result);
      res.send(result);
    });

  });

});

推荐答案

用于Cloud Storage的Admin SDK只是该库中的存储对象.使用admin.storage().bucket()，您将获得默认存储存储桶用于您的项目.在此处，您应该使用 file() 创建对该存储桶中文件的引用，并根据需要下载它们.

The Admin SDK for Cloud Storage is just a wrapper around the @google-cloud/storage module. When you call admin.storage(), what you're getting back is a Storage object from that library. With admin.storage().bucket(), you're getting the default storage Bucket for your project. From there, you should use file() to create a reference to files in that bucket and download them as needed.

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