[英]Storing Image Using Cloud Functions for Firebase
I'm trying to refactor some code to use Cloud Functions for Firebase. 我正在尝试重构一些代码以使用Cloud Functions for Firebase。 The code should store an image at a path in Firebase storage. 代码应将图像存储在Firebase存储中的路径中。 For the most part the code is the exact same as before except now instead of 在大多数情况下,代码与之前完全相同,除了现在而不是
server.post('/', (req, res) => {
// Some code
}
I'm using the following according to the Firebase documentation 我根据Firebase文档使用以下内容
exports.getProcessedImage = functions.https.onRequest((req, res) => {
// Some code
});
The code worked previously but now I'm having trouble getting my test image to save to Firebase. 该代码以前工作但现在我无法将我的测试图像保存到Firebase。 Not sure why. 不知道为什么。 I check the Network tab in developer tools and the getProcessedImage endpoint is triggering the code to run and it responds with a 200 code so not sure what the issue is. 我检查开发人员工具中的“网络”选项卡,并且getProcessedImage端点正在触发要运行的代码,并且它以200代码响应,因此不确定问题是什么。 Thanks in advance for any help! 在此先感谢您的帮助!
My full code is below :) 我的完整代码如下:)
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
const request = require('request');
const crypto = require('crypto');
const storage = require('@google-cloud/storage');
// Firebase Project ID and Service Account Key.
const gcs = storage({
projectId: 'snapshelf-aabb55',
keyFilename: './serviceAccountKey.json'
});
const bucket = gcs.bucket('snapshelf-aabb55.appspot.com');
function saveImage(url) {
// Generate a random HEX string using crypto (a native node module).
const randomFileName = crypto.randomBytes(16).toString('hex');
// Fetch image info using a HTTP HEAD request.
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/HEAD
request.head(url, (error, info) => {
if (error) {
return console.error(error);
}
// Download image from Pixelz, then save the image to Firebase
// using the Google Cloud API and the magic of Node Streams.
// https://googlecloudplatform.github.io/google-cloud-node/#/docs/google-
cloud/v0.52.0/storage/file
// http://stackoverflow.com/questions/28355079/how-do-node-js-streams-work
request(url)
.pipe(
bucket.file(`sample/images/${randomFileName}`).createWriteStream({
metadata: {
contentType: info.headers['content-type']
}
})
)
.on('error', (err) => {
// Do something if the upload fails.
console.error(err);
})
.on('finish', () => {
// Do something when everything is done.
// Get download url for stored image
console.log('Image successfully uploaded to Firebase Storage!')
});
});
}
exports.getProcessedImage = functions.https.onRequest((req, res) => {
console.log(req.body.processedImageURL);
/*
if (req.body && req.body.processedImageURL) {
// Get image from Pixelz and save it to Firebase Storage.
saveImage(req.body.processedImageURL);
return res.status(200).end();
}
res.status(400).end();
*/
const url = 'https://www2.chemistry.msu.edu/courses/cem352/SS2017_Wulff/MichiganState.jpg'
console.log(url);
saveImage(url);
console.log('Saving url');
res.status(200).send();
});
Are you deploying your Function on Firebase with Spark Plan (Free)? 您是否使用Spark Plan(免费)在Firebase上部署功能?
If the answer is yes, your problem is because of this: 如果答案是肯定的,那你的问题是因为:
Firebase projects on the Spark plan can make only outbound requests to Google APIs. Spark计划中的Firebase项目只能向Google API发出出站请求。 Requests to third-party APIs fail with an error. 对第三方API的请求失败并显示错误。 For more information about upgrading your project. 有关升级项目的更多信息。
Since you are trying to make an external request , nothing is happening when your Function is executed :( 由于您尝试发出外部请求 ,因此执行函数时不会发生任何事情:(
Thats easy right now! 多数民众赞成在现在! Since you have admin. 既然你有管理员。 just change 只是改变
const bucket = gcs.bucket('snapshelf-aabb55.appspot.com');
to 至
const bucket = admin.storage().bucket();
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