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Invoice management example in Xiana + PostgREST

Setup

Create database invoice_management.

docker build -t xiana_showcase -f docker/db.dockerfile .

docker run --name xiana_showcase -e POSTGRES_PASSWORD=curve25519 -p 5433:5432 -d xiana_showcase

docker start xiana_showcase

Running

You will need to run PostgREST in one terminal, Xiana in a second terminal and nginx in another terminal.

Running Xiana app

Install leiningen

Download the lein script (or on Windows lein.bat if you don't use WSL) Place it on your $PATH where your shell can find it (eg. /usr/local/bin/) Set it to be executable (sudo chmod a+x /usr/local/bin/lein) Run it (lein) and it will download the self-install package

https://leiningen.org/

brew install leiningen

Run Xiana

go to invoices folder

cd invoices

and

lein run

It will download the dependencies of the project the first time. Then start the project, the server. It adds migrations table and sessions table.

Running PostgREST

Generate secret key

The secret key need to be at leat 32 characters long.

echo "jwt-secret = \"$(LC_ALL=C tr -dc 'A-Za-z0-9' </dev/urandom | head -c32)\"" >> postgrest.conf

postgrest postgrest.conf

Running nginx

Install Ngninx

For Debian-based Linux

sudo apt install nginx-core

For Mac OS

brew install nginx

Is a web server that can also be used as a reverse proxy.

Run nginx:

sudo nginx -c /path-to-your-repo/postgrest-xiana-showcase/nginx.conf

sudo nginx -c nginx.conf

Check nginx is running:

sudo systemctl status nginx

To reload some configuration from the nginx.conf file You can run:

sudo pkill nginx
sudo nginx -c /Users/jacobocordova/Documents/GitHub/postgrest-xiana-showcase/nginx.conf

To check if there is something already running on some port:

sudo netstat -nlp | grep :80

JWT tokens and usage

We will be using a Ruby script to generate a JWT token.

Installing Ruby

sudo apt-get install ruby-full

Install jwt gem

sudo gem install jwt

Generate JWT token

ruby gen-jwt.rb <user> <role>

For example:

ruby gen-jwt.rb user1 web_user

During development, you can verify your JWT Token here: https://jwt.io/

Calling PostgREST

Depends on httpie cli https://httpie.io/cli

Run the sample request in rest.http

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