Notes on ScopePort

GitHub offers you a lot of post-receive notifications. This means that some actions are made whenever you commit something. You can e.g. send notifications via Jabber or IRC – Another option is to call a URL with JSON data. This Rails snippet receives the JSON data and stores relevant information in your database:

class TunerController < ApplicationController

	# Basic HTTP authentication.
	USER, PASSWORD = "github", "secret"
	before_filter :authenticate

	# Disable need of authenticity token.
	skip_before_filter :verify_authenticity_token

	def index
		# Include JSON. (gem install json)
		require 'json'

		# Check if the JSON request is in correct format.
		if params[:payload].blank?
			# Wrong format. Exit.
			render :text => "no payload"
			return
		end

		# Parse the JSON request and store resulting hash.
		push = JSON.parse(params[:payload])

		# Get the "commits" part.
		commits = push["commits"]

		# Check if there were commits. Yes, there should be some...
		if commits.blank?
			# No commits found. Strange - Exit!
			render :text => "no commits found"
			return
		end

		# Store the interesting information of the last commit-
		last_commit_message = commits.last["message"]
		last_commit_timestamp = commits.last["timestamp"]
		last_commit_author = commits.last["author"]["name"]

		# Create a new object to save in databse.
		data = Git_Message.new do |d|
			d.last_commit_message = last_commit_message
			d.last_commit_timestamp = last_commit_timestamp
			d.last_commit_author = last_commit_author
		end

		# Save our commit data in the database!
		if !data.save
			# Could not save.
			render :text => "could not store in database"
			return
		end

		# Everything went well.
		render :text => "done"
	end

	private

	def authenticate
		authenticate_or_request_with_http_basic "nothing to see here"
                  do |id, password|
			id == USER && password == PASSWORD
		end
	end

end

Set the GitHub post-receive URL to something like http://github:secret@example.org/tuner – Where “github” is the user and “secret” the password. You can alternatively just enter the URL and remove the authentication methods from the Rails controller.