Thumbnail creation using Sharp

package.json

@@ -33,7 +33,6 @@
     "frappe-datatable": "^1.3.1",
     "friendly-errors-webpack-plugin": "^1.7.0",
     "html-webpack-plugin": "^3.2.0",
-    "imagemagick": "^0.1.3",
     "jquery": "^3.3.1",
     "jwt-simple": "^0.5.1",
     "luxon": "^1.0.0",
@@ -48,8 +47,8 @@
     "passport": "^0.4.0",
     "passport-jwt": "^4.0.0",
     "puppeteer": "^1.2.0",
-    "quickthumb": "^0.0.12",
     "sass-loader": "^7.0.3",
+    "sharp": "^0.20.8",
     "showdown": "^1.8.6",
     "socket.io": "^2.0.4",
     "sqlite3": "^3.1.13",

server/index.js

@@ -17,8 +17,8 @@ const { setupExpressRoute: setRouteForPDF } = require('frappejs/server/pdf');
 const auth = require('./../auth/auth')();
 const morgan = require('morgan');
 const { addWebpackMiddleware } = require('../webpack/serve');
-const { getAppConfig } = require('../webpack/utils');
+const { getAppConfig, resolveAppDir } = require('../webpack/utils');
-const quickthumb = require('quickthumb')
+const { thumbnailMiddleware } = require('./utils');
 
 frappe.conf = getAppConfig();
 
@@ -42,7 +42,7 @@ module.exports = {
         app.use(bodyParser.urlencoded({ extended: true }));
 
         app.use(express.static(frappe.conf.distPath));
-        app.use('/static', quickthumb.static(path.resolve(frappe.conf.staticPath), { type: 'resize' }));
+        app.use('/static', thumbnailMiddleware(resolveAppDir(frappe.conf.staticPath)));
 
         app.use(morgan('tiny'));
 

server/utils.js

@@ -2,6 +2,7 @@ const mkdirp = require('mkdirp');
 const fs = require('fs');
 const getDirName = require('path').dirname;
 const os = require('os');
+const sharp = require('sharp');
 
 module.exports = {
     writeFile(fullpath, contents) {
@@ -22,5 +23,61 @@ module.exports = {
 
     getTmpDir() {
         return os.tmpdir();
+    },
+    
+    thumbnailMiddleware(staticPath) {
+
+        return function(req, res, next){    
+
+            const file = (req.url).toString().replace(/\?.*/, "");
+            const dimension = req.query.size || ""
+            const staticFile = staticPath + file
+
+            fs.exists(staticFile, (exists) => {
+                if(!exists){
+                    return next()
+                }
+
+                fs.stat(staticFile, (err, stats) => {
+                    if(err){
+                        throw err
+                    }
+
+                    //Check if url is static file
+                    if(stats.isFile()){
+
+                        //Check if url has dimension parameters
+                        if(dimension != ""){
+                            const width = parseInt(dimension.split('x')[0])
+                            const height = parseInt(dimension.split('x')[1])
+                            const destination = staticPath + '/.thumbnails/' + width + 'x' + height + file.replace('/', '')
+                            
+                            //Check if thumbnail already present
+                            fs.existsSync(destination, (exists) => {
+                                if(exists)
+                                    return res.sendFile(destination)
+                            })
+
+                            //Resize image
+                            sharp(staticFile)
+                                .resize(width, height)
+                                .toFile(destination)
+                                .then(() => {
+                                    return res.sendFile(destination)
+                                })
+                                .catch(err => {
+                                    console.error(err)
+                                })
+
+                        } else {
+                            return res.sendFile(staticFile)
+                        }
+                    } else {
+                        console.log('File is not static.')
+                        return next()
+                    }
+                })
+            })
+        }
     }
 }