Class: CloudstackClient::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/cloudstack-client/client.rb

Constant Summary collapse

@@async_poll_interval = 
2.0
@@async_timeout = 
300

Instance Method Summary collapse

Constructor Details

#initialize(api_url, api_key, secret_key, opts = {}) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/cloudstack-client/client.rb', line 23

def initialize(api_url, api_key, secret_key, opts = {})
  @api_url = api_url
  @api_key = api_key
  @secret_key = secret_key
  @use_ssl = api_url.start_with? "https"
  @verbose = !opts[:quiet]
end

Instance Method Details

#send_async_request(params) ⇒ Object

Sends an asynchronous request and waits for the response.

The contents of the ‘jobresult’ element are returned upon completion of the command.



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# File 'lib/cloudstack-client/client.rb', line 86

def send_async_request(params)

  json = send_request(params)

  params = {
      'command' => 'queryAsyncJobResult',
      'jobId' => json['jobid']
  }

  max_tries = (@@async_timeout / @@async_poll_interval).round
  max_tries.times do
    json = send_request(params)
    status = json['jobstatus']

    print "." if @verbose

    if status == 1 then
      return json['jobresult']
    elsif status == 2 then
      puts
      puts "Request failed (#{json['jobresultcode']}): #{json['jobresult']}"
      exit 1
    end

    STDOUT.flush
    sleep @@async_poll_interval
  end

  print "\n"
  puts "Error: Asynchronous request timed out"
  exit 1
end

#send_request(params) ⇒ Object

Sends a synchronous request to the CloudStack API and returns the response as a Hash.

The wrapper element of the response (e.g. mycommandresponse) is discarded and the contents of that element are returned.



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# File 'lib/cloudstack-client/client.rb', line 37

def send_request(params)
  params['response'] = 'json'
  params['apiKey'] = @api_key

  params_arr = []
  params.sort.each { |elem|
    params_arr << elem[0].to_s + '=' + CGI.escape(elem[1].to_s).gsub('+', '%20').gsub(' ','%20')
  }
  data = params_arr.join('&')
  signature = OpenSSL::HMAC.digest('sha1', @secret_key, data.downcase)
  signature = Base64.encode64(signature).chomp
  signature = CGI.escape(signature)

  url = "#{@api_url}?#{data}&signature=#{signature}"

  uri = URI.parse(url)
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = @use_ssl
  http.verify_mode = OpenSSL::SSL::VERIFY_NONE

  begin
    response = http.request(Net::HTTP::Get.new(uri.request_uri))
  rescue
    puts "Error connecting to API:"
    puts "#{@api_url} is not reachable"
    exit 1
  end

  if !response.is_a?(Net::HTTPOK) then
    puts "Error #{response.code}: #{response.message}"
    puts JSON.pretty_generate(JSON.parse(response.body))
    puts "URL: #{url}"
    exit 1
  end

  begin 
    json = JSON.parse(response.body)
  rescue JSON::ParserError
    puts "Error parsing response from server."
    exit 1
  end
  json[params['command'].downcase + 'response']
end