OAuth to SmartThings, hit an "API Access App", get JSON of all things.

This barebones Node application uses a series of requests authenticate a user to SmartThings, install a "SmartApp" (see smartapp.groovy) for that user, and finally fetch JSON from that SmartApp of all their things.

• Authenticate a user to ST using OAuth 2.0
• Request the SmartApp installation's unique URL
• Immediately GET /things from that SmartApp
• Dump JSON of the things back to the browser

• Create a user local to the Node app
• Cache the OAuth token
• Serve as a foundation for a full implementation, just a starting point

• Create a SmartApp through the SmartThings Wed IDE with OAuth enabled
• Copy into that app the contest of smartapp.groovy
• Install Node.js
• $ npm install
• Adjust configuration in index.js (line 4)
• Run index.js
• Open the server root in a browser.

There is a known issue with sending "localhost" in your callback url to the SmartThings OAuth server (configuration line 7). Use an IP address (terribly inconvenient for a development environment) or a tool like Katon.