Wie lade ich Dateien in die GCloud in Node.js hoch?

Question

WAS ICH GESCHAUTES:

• Upload files to Firebase Storage using Node.js

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GEDANKEN:

Ich speichere die Bilder derzeit lokal und speichere die Bildpfade in der Firebase Echtzeitdatenbank. Ich möchte die Bilder in der GCloud speichern (um Kosten zu sparen).

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FRAGE:

WIE SOLL ICH MEINE AKTUELLE CODE ÄNDERN ZUM gcloud hochladen?

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CURRENT Code:

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

Ich denke, es ist besser firebase.storage in Web oder App zu verwenden, um direkt auf die gcloud zu laden, aber Sie diesen Code verwenden können, um Ihr Problem zu lösen

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;