jquery-file-upload-middleware with express.js: how to move files & add watermarks?

How to move the original file :

On jquery-file-upload-middleware website, it explains how to move a file, and if you read their documentation, how to move a file with a custom suffix (User ID, Session ID, etc.) :

app.use('/api', function (req, res, next) { req.filemanager = upload.fileManager(); next(); }); app.use('/api/endpoint', function (req, res, next) { // your real /api handler that will actually move the file ... // req.filemanager.move(filename, path, function (err, result)) req.filemanager.move('SomeFile.jpg', 'project1', function (err, result) { // SomeFile.jpg gets moved from uploadDir/SomeFile.jpg to // uploadDir/project1/SomeFile.jpg // if path is relative (no leading slash), uploadUrl will // be used to generate relevant urls, // for absolute paths urls are not generated if (!err) { // result structure // { // filename: 'SomeFile.jpg', // url: '/uploads/project1/SomeFile.jpg', 

If you don't want to do this, (This post) explains how you can move a file from one location to another with node. I changed the unlinkSync() to unlink()

var fs = require('fs'); //var util = require('util'); var is = fs.createReadStream('source_file'); var os = fs.createWriteStream('destination_file'); is.pipe(os); is.on('end',function() { fs.unlink('source_file', function(err){ // Continue execution }); }); /* node.js 0.6 and earlier you can use util.pump: util.pump(is, os, function() { fs.unlink('source_file', function(err){ // Continue execution }); }); */ 

Add a watermark to a file

This post explains how, with node, you can spawn a child process and use ImageMagick to add a watermark to an image :

 // Require our module dependencies var exec = require('child_process').exec; // Create command array to invoke ImageMagick composite where // -dissolve is the amount of transparency for the watermark // -gravity tells how to align images of varying size // -quality is the image quality of the JPEG (not required if producing PNG) var command = [ 'composite', '-dissolve', '50%', '-gravity', 'center', '-quality', 100, pathToWatermarkJpg, pathToImageJpg, pathToResultJpg; ]; // Join command array by a space character and then execute command exec(command.join(' '), function(err, stdout, stderr) { // Do stuff with result here });