Ruby - Logicmonitor Rest API - auth / signing

LogicMonitorRubySigning.rb

require 'rest-client' #rubygem
require 'date'
require 'openssl'


#warning. the code from below has come from a class. Ive cleaned it up but there may be some errors. This is a GIST after all


# Instance variables  
@LM_accountname = 'lM_accountname'
@LM_access_id = 'lM_access_id'
@LM_access_key = 'lM_access_key'
@URL = "https://#{@LM_accountname}.logicmonitor.com/santaba/rest"
RestClient.add_before_execution_proc do |request, params|
	##Lets check to see if the URL is a logicmonitor rest URL. If so we should sign the request!
	if request.uri.to_s.include? ".logicmonitor.com/santaba/rest"
		if defined?params[:payload]
			#puts params[:payload]
		  datastring=params[:payload]
		else
		  datastring=''
		end
		#puts params[:payload]
		urlwithoutparams=URI.parse(request.path).path
		pathsplit=urlwithoutparams.split('rest') #need to split the request path so that we have something like /service/services
		#puts pathsplit
		resourcepath=pathsplit[1] #see above comment

	    puts "RestClient-Request: Using Logicmonitor Rest API Signing Code for `#{request.method}` request on endpoint: `#{resourcepath}` of instance: `#{@LM_accountname}`"

		timestamp = DateTime.now.strftime('%Q') #epoch date timestamp. 

		requestVars = request.method + "#{timestamp}#{datastring}#{resourcepath}"

		signature = Base64.strict_encode64(
		  OpenSSL::HMAC.hexdigest(
			OpenSSL::Digest.new('sha256'), 
			@LM_access_key,
			requestVars
		  )
		)

		# The signature is added as HTTP header to the request

		#puts "RestClient-Request: Domain contains '.logicmonitor.com/santaba/rest', Signing request with HMAC-SHA256 LMv1 Auth"
		request['Authorization'] = "LMv1 #{@LM_access_id}:#{signature}:#{timestamp}"
	end
end


#########################
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#########################

temp_url = @URL + '/service/services'
response = RestClient.get(temp_url)

# Printing API server response
puts "\nServer response: #{response}"


#########################

puts "Rest Post API Example with LogicMonitor"
temp_url = @URL + '/service/services'
payload = '{"name":"newPingService","type":"ping","stopMonitoring":false,"disableAlerting":true,"pollingInterval":3,"host":"www.google.com"}'

# Executing HTTP request
response = RestClient.post( temp_url, payload, :content_type => :json,)

# Printing API server response
puts "\nServer response: #{response}"

#########################


# now you can do requests easily. EG
collectorid="1"
downloadLocation = "/tmp/"
puts 'attempting to download logicmonitor agent. This may take some time. Collector ID: '+collectorID
temp_url = @URL + '/setting/collectors/'+collectorID+'/installers/Linux64'
response = RestClient.get( temp_url)
if response.code == 200
  puts "Collector Retrieved, Saving file."
  filelocation = downloadLocation+'/collectorInstaller.bin'
  File.open(filelocation, 'w') { |file| file.write(response.body) }
  puts "Installer file should now exist: "+filelocation.to_s
else
  errormessage="Abort: Failure: Critical: Unable to get collector installer from LogicMonitor. API Error Code: "+response.code.to_s
  abort(errormessage)
end