salix/services/mailer/application/router.js

var express = require('express');
var router = new express.Router();
var fs = require('fs');
var path = require('path');

// Mailer default page
router.get('/', function(request, response) {
    response.json({});
});

// Notifications
router.use('/notification', require('./route/notification.js'));

// Serve static images
router.use('/static/:template/:image', function(request, response) {
    let imagePath = path.join(__dirname, '/template/', request.params.template, '/image/', request.params.image);

    fs.stat(imagePath, function(error) {
        if (error)
            return response.json({message: 'Image not found'});

        let readStream = fs.createReadStream(imagePath);

        readStream.on('open', function() {
            let contentType = getContentType(imagePath);

            if (contentType)
                response.setHeader('Content-type', getContentType(imagePath));

            readStream.pipe(response);
        });
    });
});

function getContentType(path) {
    let types = {
        png: 'image/png',
        svg: 'image/svg+xml',
        gif: 'image/gif',
        jpeg: 'image/jpeg',
        jpg: 'image/jpeg'
    };

    let extension = path.split('.')[1];

    return types[extension];
}

module.exports = router;