如何将file upload到Node.js中的GCloud？

我看到了什么：

• 与Google云端平台整合

• 使用Node.js将file upload到Firebase存储

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感想：

我目前在本地存储图像，并将图像path存储在Firebase实时数据库中。 我想将图像存储在GCloud中（以降低成本）。

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题：

我应该如何修改我现行的守则上传到GCLOUD？

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当前代码：

var express = require("express"); var router = express.Router(); var flash = require("connect-flash"); var firebase = require("firebase"); var multer = require("multer"); var upload = multer({dest:"./public/images/uploads/", limits: {fileSize: 250000}}).single("image"); router.get("/", function(req, res, next){ if (firebase.auth().currentUser == null) { global.page_name = "login"; res.render("users/login"); } else { global.page_name = "upload"; res.render("upload"); } }); router.post("/", function(req, res, next){ upload(req,res, function (err) { if (err) { req.flash("error_msg", "File too large. Max Size: 250KB"); res.redirect("/upload"); return } var title = req.body.title; var section = req.body.section; // Validation req.checkBody('title', 'Title is required').notEmpty(); req.checkBody('title', 'Title is too long, max: 50 charachters !').len(0,50); req.checkBody('section', 'Section is required').notEmpty(); var errors = req.validationErrors(); if(errors){ res.render('upload', { errors: errors }); } else { if (req.file){ console.log("Uploading file..."); var image = req.file.filename; var section = req.body.section.toLowerCase(); var IDref = firebase.database().ref("posts/"+section+"/lastID"); IDref.once("value", function(IDsnapshot){ var number = IDsnapshot.val(); var postRef = firebase.database().ref("posts/"+section).push(); var UID = postRef.key; var post = { title: req.body.title, section: req.body.section, image: image, author: firebase.auth().currentUser.uid, section: section, upvotes: 0, downvotes: 0, id: number + 1, key: UID } IDref.set(post.id); postRef.set(post); var authoredPost = { title: req.body.title, section: section, } var userRef = firebase.database().ref("users/"+firebase.auth().currentUser.uid.toString()+"/posts/"+UID.toString()); userRef.set(authoredPost); }); req.flash("success_msg", "Post Created"); res.redirect("/upload"); } else { console.log("No file uploaded"); req.flash("error_msg", "Image is required"); res.redirect("/upload"); } } }); }); module.exports = router; 

Answer 1

我认为它更好地使用web或应用程序中的firebase.storage直接上传到GCloud，但您可以使用此代码来解决您的问题

 var express = require("express"); var router = express.Router(); var flash = require("connect-flash"); var fs = require('fs'); var firebase = require("firebase"); var gcloud = require('google-cloud'); var multer = require("multer"); var upload = multer({dest:"./public/images/uploads/", limits: {fileSize: 250000}}).single("image"); // Enable Storage var gcs = gcloud.storage({ projectId: 'grape-spaceship-123', keyFilename: '/path/to/keyfile.json' }); // Reference an existing bucket. var bucket = gcs.bucket('my-existing-bucket'); router.get("/", function(req, res, next){ if (firebase.auth().currentUser == null) { global.page_name = "login"; res.render("users/login"); } else { global.page_name = "upload"; res.render("upload"); } }); router.post("/", function(req, res, next){ upload(req,res, function (err) { if (err) { req.flash("error_msg", "File too large. Max Size: 250KB"); res.redirect("/upload"); return } var title = req.body.title; var section = req.body.section; // Validation req.checkBody('title', 'Title is required').notEmpty(); req.checkBody('title', 'Title is too long, max: 50 charachters !').len(0,50); req.checkBody('section', 'Section is required').notEmpty(); var errors = req.validationErrors(); if(errors){ res.render('upload', { errors: errors }); } else { if (req.file){ console.log("image saved successfully in local"); //upload to the GCloud bucket.upload(req.file.filename, function(err, file) { if (!err) { console.log("image saved successfully in GCloud"); //remove local image fs.unlink(req.file.filename, (err) => { if (err) throw err; console.log('successfully deleted /tmp/hello'); }); //store image name in firebase var image = file.name;//may be another key hold the image name. var section = req.body.section.toLowerCase(); var IDref = firebase.database().ref("posts/"+section+"/lastID"); IDref.once("value", function(IDsnapshot){ var number = IDsnapshot.val(); var postRef = firebase.database().ref("posts/"+section).push(); var UID = postRef.key; var post = { title: req.body.title, section: req.body.section, image: image, author: firebase.auth().currentUser.uid, section: section, upvotes: 0, downvotes: 0, id: number + 1, key: UID } IDref.set(post.id); postRef.set(post); var authoredPost = { title: req.body.title, section: section, } var userRef = firebase.database().ref("users/"+firebase.auth().currentUser.uid.toString()+"/posts/"+UID.toString()); userRef.set(authoredPost); }); req.flash("success_msg", "Post Created"); res.redirect("/upload"); } }); } else { console.log("No file uploaded"); req.flash("error_msg", "Image is required"); res.redirect("/upload"); } } }); }); module.exports = router;