fix(file.controller.js): set headers for file extensions from MIME -I1218 (#1330)

* fix(file.controller.js): set headers for file extensions from MIME - I1218
* Use name to work out content type and provide fallback

Co-authored-by: Andrew Nicolaou <me@andrewnicolaou.co.uk>

Author: elit-altum

package-lock.json

@@ -134,6 +134,7 @@
     "jshint": "^2.11.0",
     "lodash": "^4.17.15",
     "loop-protect": "github:catarak/loop-protect",
+    "mime-types": "^2.1.26",
     "mjml": "^3.3.2",
     "mockingoose": "^2.13.2",
     "mongoose": "^5.9.2",

package.json

@@ -1,4 +1,5 @@
 import each from 'async/each';
+import mime from 'mime-types';
 import isBefore from 'date-fns/is_before';
 import Project from '../models/project';
 import { resolvePathToFile } from '../utils/filePath';
@@ -120,6 +121,8 @@ export function getFileContent(req, res) {
       res.status(404).send({ success: false, message: 'File with that name and path does not exist.' });
       return;
     }
+    const contentType = mime.lookup(resolvedFile.name) || 'application/octet-stream';
+    res.set('Content-Type', contentType);
     res.send(resolvedFile.content);
   });
 }