Class: ScalrAPI

Inherits:
Object
  • Object
show all
Defined in:
lib/kitchen/driver/ScalrAPI.rb

Instance Method Summary collapse

Constructor Details

#initialize(url, key_id, key_secret) ⇒ ScalrAPI

Returns a new instance of ScalrAPI.



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# File 'lib/kitchen/driver/ScalrAPI.rb', line 9

def initialize(url, key_id, key_secret)

	@api_url = url
	@api_key_id = key_id
	@api_key_secret = key_secret

end

Instance Method Details

#create(url, data) ⇒ Object

Create item in API



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# File 'lib/kitchen/driver/ScalrAPI.rb', line 109

def create(url, data)
	response = self.request('POST', url, data)
	return response['data']
end

#delete(url) ⇒ Object

Delete item from API



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# File 'lib/kitchen/driver/ScalrAPI.rb', line 115

def delete(url)
	response = self.request('DELETE', url)
	return true	
end

#edit(url, data) ⇒ Object

Edit items in API via PATCH



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# File 'lib/kitchen/driver/ScalrAPI.rb', line 127

def edit(url, data)
	response = self.request('PATCH', url, data)
	return response['data']
end

#fetch(url) ⇒ Object

Fetch a single item from API



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# File 'lib/kitchen/driver/ScalrAPI.rb', line 103

def fetch(url)
	response = self.request('GET', url)
	return response['data']
end

#list(url) ⇒ Object

List items from API



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# File 'lib/kitchen/driver/ScalrAPI.rb', line 89

def list(url)
	data = []
	
	while url != nil do
		response = self.request('GET', url)
	
		data.concat response['data']
		url = response['pagination']['next']
	end
	
	return data
end

#post(url, data) ⇒ Object

Edit items in API



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# File 'lib/kitchen/driver/ScalrAPI.rb', line 121

def post(url, data)
	response = self.request('POST', url, data)
	return response['data']
end

#request(method, url, body = '') ⇒ Object 



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# File 'lib/kitchen/driver/ScalrAPI.rb', line 17

def request(method, url, body='')

	#JSON encode body if set
	if body != ''
		body = body.to_json
	end
	
	#Split URL into components
	parts = URI.parse(@api_url + url)
	
	path = parts.path
	host = parts.host
	port = parts.port

	query = ''
	if parts.query != nil
		#Convert querystring into an array
		q = parts.query.split('&')
		
		#Sort the querystring array
		q.sort!
		
		#Convert querystring array back to string
		query = q.join('&')
	end
	
	#Create ISO 8601 date/time string
	time = Time.now.utc.iso8601 + '+00:00'
	
	#Collection of request data for generating signature
	request = [
		method,
		time,
		path,
		query,
		body
	]
	
	#Calculate signature based on request data
	signature = 'V1-HMAC-SHA256 ' + Base64.encode64(OpenSSL::HMAC.digest(OpenSSL::Digest.new('sha256'), @api_key_secret, request.join("\n"))).strip()
	
	#HTTP request headers
	headers = {
		'X-Scalr-Key-Id' => @api_key_id,
		'X-Scalr-Signature' => signature,
		'X-Scalr-Date' => time,
		'X-Scalr-Debug' => '1'
	}
	
	if body != ""
		headers['Content-Type'] = 'application/json'
	end
	begin
		response = ::RestClient::Request.execute(
			:method => method, 
			:url => @api_url + url,
			:headers => headers,
			:payload  => body
		)
	rescue RestClient::ExceptionWithResponse => e
		puts "Scalr server returned an error: "
		puts e.response
		raise e
	end
	if response == ""
		response = "{}"
	end
	return JSON.parse(response)

end