Go URL

A simple URL shortener written in Go with a React frontend and Postgres database.

Features

• Shorten urls based on a user defined key
• Alias a key to point to another short url
• Open multiple pages at once by separating keys with a comma
• Alias a key to point to multiple other keys
• Use variables in URLs
• Opensearch integration to provide suggestions directly to browser
• Frontend to view most popular searches and search to find existing links
• Frontend to allow anyone to add and edit links
• Optional authentication using Azure AD or Okta
• Slack / command integration
• Slackbot integration

Getting Started

The recommended way to test and deploy is using Docker. You will need to run both the go-url app, and the Postgres DB.

Start Postgres

docker run -d -P --name db -e POSTGRES_PASSWORD=password -e POSTGRES_DB=go -e POSTGRES_ADDR=db:5432 postgres:11.3-alpine

Start App

docker run -p 1323:1323 -e HOSTS=localhost -e APP_URI=http://localhost:1323 --link db alexbrazier/go-url

Alteratively use the docker-compose file and run:

docker-compose up

Development

Open http://localhost:8080/go

Run Postgres manually or with Docker

docker-compose up postgres

Install node (via nvm), yarn & go

brew install nvm yarn go
nvm install

Start frontend

cd frontend
yarn
yarn start

Start API

cd api
dep ensure
POSTGRES_PASS=password HOSTS=localhost APP_URI=http://localhost:3000 go run server.go

Enviroment Configuration

Env Var	Required	Default	Example	Description
HOSTS	yes		go.domain.com,go2.domain.com	List of comma separated hosts that the server will be able to be accessed from
BLOCKED_HOSTS			go.domain.com,go2.domain.com	List of hosts you want to block from being linked - HOSTS are already included to stop recursive calls
APP_URI	yes		https://go.domain.com	Default URI of app - used to link back to app
PORT		1323		Port the app will run on
DEBUG		false		Enable more logging
JSON_LOGS		false		Use JSON logs where possible
POSTGRES_ADDR		localhost:5432		Postgres db address
POSTGRES_DATABASE		go		Postgres db name
POSTGRES_USER		postgres		Postgres user
POSTGRES_PASS		password		Postgres password
SLACK_TOKEN			xoxb-xxxxxxxxx-xxxxxxxx-xxxx	Slack OAuth token to enable slackbot
SENTRY_API_DSN				Sentry DSN for go API
SENTRY_FRONTEND_DSN				Sentry DSN for react frontend
SLACK_SIGNING_SECRET			xxxxxxxxxxx	Slack signing secret to enable Slack /go command
SLACK_TEAM_ID			Txxxxxxxx	Slack team id to restrict slash command responses to single team
ENABLE_AUTH		false		Enable Azure auth or not - if enabled, all other fields must be filled in
AUTH_EXPIRY_SECONDS		2592000		Auth cookie expiry (default 30 days)
SECURE_COOKIES		true		Use secure https only cookies
AD_TENANT_ID				Azure AD tenant ID
AD_CLIENT_ID				Azure AD client ID
AD_CLIENT_SECRET				Azure AD client secret
OKTA_CLIENT_ID				Okta client ID
OKTA_CLIENT_SECRET				Okta client secret
OKTA_ISSUER			https://dev-123.oktapreview.com/oauth2/default	Okta issuer url
SESSION_TOKEN				Secret session token to store the user sessions
ALLOWED_IPS			110.1.10.2,1.1.22.0/24	IP addresses or CIDRs that are always allowed access, even with auth enabled
ALLOW_FORWARDED_FOR		false		Retrieve origin IP from X-Forwarded-For header. Only enable if source is trusted, e.g. via Cloudfront
FORWARDED_FOR_TRUST_LEVEL		1		Number of levels to trust X-Forwarded-For header - should map to number of proxies used

FAQ

Slackbot is posting multiple replies messages to a single message

When enabled, the Slackbot will be running on every node in a load balanced system. Either disable load balancing, or run a separate instance just for the Slackbot.