Upload files to a directory

Usage no npm install needed!

<script type="module">
  import expressMustacheUpload from '';


Express Mustache Upload

CAUTION: Under active development, not suitable for production use for people outside the development team yet.

This script will look at the URL path then the uploaded file name when choosing how to name a file.


You configure the container by setting environment variables:

  • DIR - The path which files should be uploaded to
  • MUSTACHE_DIRS - A : separated list of paths the system should look for mustache templates before using its default ones.
  • DISABLE_AUTH - Defaults to false but can be true to make file uploading and downloading work without requiring sign in. Only recommended for development.
  • DISABLED_AUTH_USER - If DISABLE_AUTH is set to true, set this to be the JSON-encoded representation of the auth user you want the server to assume is signed in. e.g. '{"admin": true, "username": "disableduser"}'. Only recommended for development.
  • SCRIPT_NAME - The base URL at which the app is hosted. Defaults to "" and must not end with /. Usually this is set to something like /upload
  • DEBUG - The loggers you want to see log output for. e.g. express-mustache-upload,express-mustache-jwt-signin.
  • PORT - The port you would like the app to run on. Defaults to 80.
  • SECRET - The secret string used to sign cookies. Make sure this is a long secret that no-one else knows, otherwise they could forge the user information in your cookies. Make sure you set the SECRET variable to the same value in the signin container too, otherwise they won't recognose each other's cookies.

Docker Example

Make sure you have installed Docker and Docker Compose for your platform, and that you can customise your networking so that www.example.localhost can point to

Also, make sure you have the source code:

git clone
cd express-mustache-upload

Tip: You can also use the published docker image at if you change the docker-compose.yml file to use image: thejimmyg/express-mustache-upload:0.1.1 instead of building from source

OK, let's begin.

For local testing, let's imagine you want to use the domain www.example.localhost.

You can create certificates as described here:

You'll need to put them in the directory domain/www.example.localhost/sni in this example. Here's some code that does this:

mkdir -p domain/www.example.localhost/sni
openssl req -x509 -out domain/www.example.localhost/sni/cert.pem -keyout domain/www.example.localhost/sni/key.pem \
  -newkey rsa:2048 -nodes -sha256 \
  -subj '/CN=www.example.localhost' -extensions EXT -config <( \
   printf "[dn]\nCN=www.example.localhost\n[req]\ndistinguished_name = dn\n[EXT]\nsubjectAltName=DNS:www.example.localhost\nkeyUsage=digitalSignature\nextendedKeyUsage=serverAuth")

Now edit your /etc/hosts so that your domain really points to for local testing. You should have a line that looks like this:	localhost www.example.localhost example.localhost

There is already a user file in users/users.yaml which the signin container can use. Edit it to change the usernames and passwords as you see fit.

Tip: You can use a hased password too for the password field. Just visit /user/hash once the example is running to generarte the hash and then update the file.

Make a directory where you can override the default templates that are in views:

mkdir -p views-upload

Make an upload directory where files will be uploaded to:

mkdir -p upload

Make sure you change the SECRET variable everywhere, otherwise someone could forge your cookies and gain access to your system. You must use the same value for SECRET in each of the containers otherwise they won't recognose each other's cookies.

You can now run the containers with:

npm run docker:run:local

Visit https://www.example.localhost/upload. You'll probably need to get your browser to accept the certficate since it is a self-signed one, then you'll be asked to sign in using the credentials in users/users.yml.

As long as the user you sign in with has the admin: true claim in the users/users.yaml file, you should be able to upload files.

Make any tweaks to templates in views-upload so that the defaults aren't affected. You can copy the defaults in the views directory as a starting point, but make sure you keep the same names.

If you see Cannot GET / it is because you visited / and no route is set up by default in gateway-lite for /, only /upload and /user are proxied to.

When you are finished you can stop the containers with the command below, otherwise Docker will automatically restart them each time you reboot (which is what you want in production, but perhaps not when you are developing):

npm run docker:stop:local


npm install
MUSTACHE_DIRS="" DISABLE_AUTH=true DISABLED_AUTH_USER='{"admin": true, "username": "disableduser"}' SCRIPT_NAME="" DEBUG=express-mustache-upload,express-mustache-overlays,express-mustache-jwt-signin DIR=upload PORT=8000 SECRET='reallysecret' npm start

Visit http://localhost:8000.

You should be able to make requests to routes restricted with signedIn middleware as long as you have the cookie, or use the JWT in an `Authorization header like this:

Authorization: Bearer <JWT goes here>

A good way of organising this is to use gateway-lite as your gateway proxying both to express-mustache-jwt-signin and this module. Then you can use express-mustache-jwt-signin to set the cookie that this project can read as long as the SECRET environmrnt variables are the same.

If you just enable SECRET but don't set up the proxy, you'll just get redirected to the SIGN_IN_URL (set to /user/signin in the example) and see a 404 page.


npm run fix


0.1.4 2019-01-02

  • Handling SIGTERM

0.1.3 2018-12-29

  • Upload files to new directories

0.1.2 2018-12-22

  • Renamed from express-file-uploader to express-mustache-uplaod so that the project can be published on NPM
  • Upgraded to express-mustache-jwt-signin 0.3.1 and express-mustache-overlays 0.3.0

0.1.1 2018-12-19

  • Added a 500 page
  • Added Docker Compose instructions
  • Documented the enviroment variables
  • Renamed List -> Files

0.1.0 2018-12-17

  • Initial release