Blueimp file upload for Express js


A simple express module for integrating the jQuery File Upload frontend plugin.

Fullstack Demo | Tutorial on my blog

History

The code was forked from a sample backend code from the plugin's repo. Adaptations were made to show how to use this plugin with the popular Express Node.js framework.

Although this code was initially meant for educational purposes, enhancements were made. Users can additionally:

• choose the destination filesystem, local or cloud-based Amazon S3,
• create thumbnail without heavy external dependencies using lwip,
• setup server-side rules by configuration,
• modify the code against a test harness.

Installation

Setup an Express project and install the package.

$ npm install blueimp-file-upload-expressjs

Beginners can follow the tutorial for detailed instructions.

Tests

Unit tests can be run with Jasmine using npm test or this command:

$ jasmine-node specs/

Manual end to end tests can be done with this full project. Change the require() path of uploadManager.js to link it this cloned repository.

Configuration

options = {
    tmpDir: __dirname + '/tmp', // tmp dir to upload files to
    uploadDir: __dirname + '/public/files', // actual location of the file
    uploadUrl: '/files/', // end point for delete route 
    maxPostSize: 11000000000, // 11 GB
    minFileSize: 1,
    maxFileSize: 10000000000, // 10 GB
    acceptFileTypes: /.+/i,
    inlineFileTypes: /\.(gif|jpe?g|png)/i,
    imageTypes:  /\.(gif|jpe?g|png)/i,
    copyImgAsThumb : true, // required
    imageVersions :{
        maxWidth : 200,
        maxHeight : 200
    },
    accessControl: {
        allowOrigin: '*',
        allowMethods: 'OPTIONS, HEAD, GET, POST, PUT, DELETE',
        allowHeaders: 'Content-Type, Content-Range, Content-Disposition'
    },
    storage : {
        type : 'local', // local or aws
        aws : {
            accessKeyId :  'xxxxxxxxxxxxxxxxx', // required if aws
            secretAccessKey : 'xxxxxxxxxxxxxxxxxxxxxxx', // required if aws
            region : 'us-west-2', //make sure you know the region, else leave this option out
            bucketName : 'xxxxxxxxx' // required if aws
        }
    }
};

Usage with options

(refer tutorial)

// config the uploader
var options = {
    tmpDir:  __dirname + '/../public/uploaded/tmp',
    uploadDir: __dirname + '/../public/uploaded/files',
    uploadUrl:  '/uploaded/files/',
    maxPostSize: 11000000000, // 11 GB
    minFileSize:  1,
    maxFileSize:  10000000000, // 10 GB
    acceptFileTypes:  /.+/i,
    // Files not matched by this regular expression force a download dialog,
    // to prevent executing any scripts in the context of the service domain:
    inlineFileTypes:  /\.(gif|jpe?g|png)/i,
    imageTypes:  /\.(gif|jpe?g|png)/i,
    copyImgAsThumb : true, // required
    imageVersions :{
        maxWidth : 200,
        maxHeight : 200
    },
    accessControl: {
        allowOrigin: '*',
        allowMethods: 'OPTIONS, HEAD, GET, POST, PUT, DELETE',
        allowHeaders: 'Content-Type, Content-Range, Content-Disposition'
    },
    storage : {
        type : 'aws',
        aws : {
            accessKeyId :  'xxxxxxxxxxxxxxxxx',
            secretAccessKey : 'xxxxxxxxxxxxxxxxx',
            region : 'us-east-1',//make sure you know the region, else leave this option out
            bucketName : 'xxxxxxxxxxxxxxxxx'
        }
    }
};

// init the uploader
var uploader = require('blueimp-file-upload-expressjs')(options);


module.exports = function (router) {
    router.get('/upload', function(req, res) {
      uploader.get(req, res, function (err,obj) {
            if(!err){
                res.send(JSON.stringify(obj));
            }
      });
      
    });

    router.post('/upload', function(req, res) {
      uploader.post(req, res, function (error,obj, redirect) {
          if(!error)
          {
            res.send(JSON.stringify(obj)); 
          }
      });
      
    });
    
    // the path SHOULD match options.uploadUrl
    router.delete('/uploaded/files/:name', function(req, res) {
      uploader.delete(req, res, function (err,obj) {
            res.Json({error:err}); 
      });
      
    });
    return router;
}

SSL Support

Set the useSSL option to true to use the package with an HTTPS server.

var express = require('express')
var fs = require('fs')
var https = require('https');

var app = express()

// config the uploader
var options = {
    ...
    useSSL: true
    ...
};

// init the uploader
var uploader = require('blueimp-file-upload-expressjs')(options);

app.get('/upload', function(req, res) {
    uploader.get(req, res, function (err,obj) {
    if(!err)
        res.send(JSON.stringify(obj)); 
})
    .post('/upload', // ...
    .delete('/uploaded/files/:name', // ...

// create the HTTPS server
var app_key = fs.readFileSync('key.pem');
var app_cert = fs.readFileSync('cert.pem');

https.createServer({key: app_key, cert: app_cert}, app).listen(443);

Multiple thumbnails

To generate multiple thumbnails while uploading

var options = {
  tmpDir: __dirname + '/../public/uploaded/tmp',
  uploadDir: __dirname + '/../public/uploaded/files',
  uploadUrl: '/uploaded/files/',
  copyImgAsThumb: true, // required
  imageVersions: {
    maxWidth: 200,
    maxHeight: 200
  },
  storage: {
    type: 'local'
  }
};

copyImgAsThumb needs to be set to true. imageVersions, maxWidth and maxHeight will by default create a thumbnail folder and place the specified width/height thumbnail in it.

Optionally, you can omit the maxHeight. In this case, it will be resize proportionally to the specified width.

imageVersions: {
    maxWidth: 200
  },

also

imageVersions: {
    maxWidth: 200,
    maxHeight : 'auto'
  },

PS : auto value works only with height.

You can also specify multiple thumbnail generations like

var options = {
  tmpDir: __dirname + '/../public/uploaded/tmp',
  uploadDir: __dirname + '/../public/uploaded/files',
  uploadUrl: '/uploaded/files/',
  copyImgAsThumb: true,
  imageVersions: {
    maxWidth: 200,
    maxHeight: 'auto',
    "large" : {
        width : 600,
        height : 600
    },
    "medium" : {
        width : 300,
        height : 300
    },
    "small" : {
        width : 150,
        height : 150
    }
  },
  storage: {
    type: 'local'
  }
};

Contributions

Changes and improvements are welcome! Feel free to fork and open a pull request.

To Do

• Make Configuration documentation clearer and shorter,
• Refactor code to build tests and provide generic transports as in winston,
• Write end to end tests with WebdriverIO,
• Provide a basic image processing pipeline (resizing, croping, filter effects),
• Provide access to other cloud-based services like Microsoft Azure.

Done

• ~~Fix Thumbnail creation when uploading images with a more 'feasible' approach~~,
• ~~Amazon S3 integration~~,
• ~~SSL Support~~.

License

blueimp-file-upload-expressjs is licensed under the MIT licence.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.