使用云端功能存储图片的Firebase [英] Storing Image Using Cloud Functions for Firebase
问题描述
server.post（'/'，（req ，res）=> {
//某些代码
}
I根据Firebase文档使用以下内容：
$ b $ pre $ export $ c $ exports.getProcessedImage = functions.https.onRequest（（req，res）= > {
//一些代码
}）;
以前但是现在我在将测试映像保存到Firebase时遇到问题不知道为什么我在开发人员工具中检查Network选项卡，并且getProcessedImage端点正在触发代码运行，并以200代码响应，所以不知道是什么
我的完整代码如下：）
lang-js prettyprint-override> 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项目ID和服务帐户密钥。
const gcs = storage（{
projectId：'snapshelf-aabb55'，
keyFilename：'./serviceAccountKey.json'
}）;
const bucket = gcs.bucket（'snapshelf-aabb55.appspot.com'）;
函数saveImage（url）{
//使用crypto（本地节点模块）生成一个随机HEX字符串。
const randomFileName = crypto.randomBytes（16）.toString（'hex'）;
//使用HTTP HEAD请求获取图像信息。
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/HEAD
request.head（url，（error，info）=> {
if（error）{
return console.error（error）;
}
//从Pixelz下载图片，然后将图片保存到Firebase
/ /使用Google Cloud API和Node Streams的魔力
// 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']
}
$）
）
.on（'error'，（err）=> {
//如果上传失败， .error（err）;
}）
.on（'finish'，（）=> {
//当一切都完成时做一些事情。
//获取存储映像的下载网址
console.log（'映像成功上传到Firebase存储！'）
}）;
}）;
exports.getProcessedImage = functions.https.onRequest（（req，res）=> {
console.log（req.body.processedImageURL）;
/ *
if（req.body&& req.body.processedImageURL）{
//从Pixelz获取图片并保存到Firebase存储
saveImage req.body.processedImageURL）;
return res.status（200）.end（）;
}
res.status（400）.end（） ;
* /
const url ='https://www2.chemistry.msu.edu/courses/cem352/SS2017_Wulff/MichiganState.jpg'
console.log（url ）;
saveImage（url）;
console.log（'Saving url'）;
res.status（200）.send（）;
}）;
免费）？
如果答案是肯定的，你的问题就是因为这个原因：
Spark计划上的Firebase项目只能对Google API发出出站请求。对第三方API的请求失败并出现错误。有关升级项目的更多信息。
由于您正在尝试创建外部请求当你的函数执行时发生：（$ / b $ b
I'm trying to refactor some code to use Cloud Functions for Firebase. The code should store an image at a path in Firebase storage. For the most part the code is the exact same as before except now instead of
server.post('/', (req, res) => {
// Some code
}
I'm using the following according to the Firebase documentation
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. Not sure why. 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. Thanks in advance for any help!
My full code is below :)
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)?
If the answer is yes, your problem is because of this:
Firebase projects on the Spark plan can make only outbound requests to Google APIs. Requests to third-party APIs fail with an error. For more information about upgrading your project.
Since you are trying to make an external request, nothing is happening when your Function is executed :(
这篇关于使用云端功能存储图片的Firebase的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
