I'm building a client application in Node.js for creating new JIRA issues and I want to authenticate users using OAuth. The Atlassian docs are pretty bad for Jira and Oauth newcomers. So, I'm looking for a single example that describes exactly how to set up the JIRA application link, and the how to build a basic app in node that connects to Jira via OAuth. I'm not sure where else to look. (I'm using JIRA v6.0.4)
There is an example for Node.JS with OAuth in the Atlassian repo that Brian also mentioned. I think it is for the 2-legged authentication.
It needs a pre-negotiated consumer key already set up by you. Here is an example how to obtain a token you can save in your config file: https://developer.atlassian.com/jiradev/api-reference/jira-rest-apis/jira-rest-api-tutorials/jira-rest-api-example-oauth-authentication