CartoDB-SQL-API/lib/api/middlewares/content.js

'use strict';

const getContentDisposition = require('../../utils/content-disposition');

module.exports = function content () {
    return function contentMiddleware (req, res, next) {
        const { filename } = res.locals.params;
        const { formatter } = req;
        const useInline = !req.query.format && !req.body.format && !req.query.filename && !req.body.filename;

        res.header("Content-Disposition", getContentDisposition(formatter, filename, useInline));
        res.header("Content-Type", formatter.getContentType());

        next();
    };
};