Class: Provider::CDB

Inherits:
Object
  • Object
show all
Defined in:
lib/depengine/provider/cdb.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#context ⇒ Object

Returns the value of attribute context.



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# File 'lib/depengine/provider/cdb.rb', line 5

def context
  @context
end

#env ⇒ Object

Returns the value of attribute env.



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# File 'lib/depengine/provider/cdb.rb', line 6

def env
  @env
end

#host ⇒ Object

Returns the value of attribute host.



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# File 'lib/depengine/provider/cdb.rb', line 4

def host
  @host
end

#protocol ⇒ Object

Returns the value of attribute protocol.



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# File 'lib/depengine/provider/cdb.rb', line 3

def protocol
  @protocol
end

Instance Method Details

#decrypt(password, transferrable) ⇒ Object 



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# File 'lib/depengine/provider/cdb.rb', line 177

def decrypt(password, transferrable)
  alg           = transferrable.split('}')[0].split('{')[1]
  hex_encrypted = transferrable.split(':')[0].split('}')[1]
  hex_iv        = transferrable.split(':')[1]
  text          = Base64.decode64(hex_encrypted)
  iv            = Base64.decode64(hex_iv)
  c             = OpenSSL::Cipher::Cipher.new(alg)
  c.decrypt

  c.key = Digest::SHA1.hexdigest(password)
  c.iv  = iv
  d     = c.update(text)
  d << c.final
end

#get_parameter(path, version) ⇒ Object 



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# File 'lib/depengine/provider/cdb.rb', line 8

def get_parameter(path, version)
  result = '@@ERROR@@'
  version = '' if version == 0

  Helper.validates_presence_of host
  Helper.validates_presence_of context
  Helper.validates_presence_of version
  Helper.validates_presence_of env
  Helper.validates_presence_of path

  begin
    url = protocol + '://' + File.join(host, context, \
                                       version.to_s, env, path)
    result = Net::HTTP.get(URI.parse(url))
    if path =~ /.json$/
      begin
        result = JSON.parse(result)
      rescue => e
        $log.writer.error 'Error: got invalid json from cdb'
        $log.writer.error "Request was: #{url}"
        $log.writer.error "Answer was: #{Net::HTTP.get(URI.parse(url))}"
        $log.writer.error e.message
        exit 1
      end
    end

    # decrypt encrypted entries automagically
    password      = ''
    password_file = (File.join(File.dirname($exec_file_path), '../etc/crypt.yaml'))

    if File.file? password_file
      password = YAML.load_file(password_file)['password']
    else
      $log.writer.warn 'Can not open etc/crypt.yaml, no decryption possible'
    end

    if result.class.name == 'Hash'
      result.each do |key, value|
        next unless value.class.name != 'Fixnum' and \
          (value =~ /^\{[\w-]+\}.+/)
        result[key] = decrypt(password, value)
      end
    else
      if result.class.name != 'Fixnum' and \
          (result =~ /^\{[\w-]+\}.+/)
        result = decrypt(password, result)
      end
    end

  rescue => e
    $log.writer.error 'Error: while connecting to configuration database'
    $log.writer.error "Request was: #{url}"
    $log.writer.error e.message
    exit 1
  end

  if result == '@@ERROR@@'
    $log.writer.error 'Error while talking to configuration database, giving up!'
    $log.writer.error "Request was: #{url}"
    exit 1
  end

  result
end

#get_parameters(path, version) ⇒ Object 



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# File 'lib/depengine/provider/cdb.rb', line 73

def get_parameters(path, version)
  result  = '@@ERROR@@'
  version = '' if version == 0
  url     = ''

  Helper.validates_presence_of host
  Helper.validates_presence_of context
  Helper.validates_presence_of version
  Helper.validates_presence_of env
  Helper.validates_presence_of path

  begin

    begin
      cdb_filesystem = Provider::CdbFilesystem.new
      result = JSON.parse(cdb_filesystem.read_data(path))
      # puts result
    rescue => e
      $log.writer.error 'Error: got invalid json from cdb'
      $log.writer.error "Request was: #{path}"
      $log.writer.error e.message
      exit 1
    end

    # decrypt encrypted entries automagically
    password      = ''
    if ENV['USE_DEPENGINE_AS_GEM']
      password_file = \
        ( File.join(File.dirname($exec_file_path), '../../etc/crypt.yaml'))
    else
      password_file = \
        ( File.join(File.dirname($exec_file_path), '../etc/crypt.yaml'))
    end
    if File.file? password_file
      password = YAML.load_file(password_file)['password']
    else
      $log.writer.warn 'Can not open etc/crypt.yaml, no decryption possible'
    end

    result.each do |key, value|
      if value.class.name == 'Hash'
        value.each do |subkey, subvalue|
          next unless subvalue.class.name != 'Fixnum' and \
              (subvalue =~ /^\{[\w-]+\}.+/)
          result[key][subkey] = decrypt(password, subvalue)
        end
      else
        if value.class.name != 'Fixnum' and
            (value =~ /^\{[\w-]+\}.+/)
          result[key] = decrypt(password, value)
        end
      end
    end

  rescue => e
    $log.writer.error 'Error: while talking to configuration database, giving up!'
    $log.writer.error "Request was: #{url}"
    $log.writer.error e.message
    exit 1
  end

  if result == '@@ERROR@@'
    $log.writer.error 'Error while talking to configuration database, giving up!'
    $log.writer.error "Request was: #{url}"
    exit 1
  end

  result
end

#set_parameter(path, key, value) ⇒ Object 



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# File 'lib/depengine/provider/cdb.rb', line 143

def set_parameter(path, key, value)
  result = '@@ERROR@@'

  Helper.validates_presence_of host
  Helper.validates_presence_of context
  Helper.validates_presence_of env
  Helper.validates_presence_of path
  Helper.validates_presence_of key
  Helper.validates_presence_of value

  begin
    json   = { key => value.to_s }.to_json
    url    = URI.parse(protocol + '://' + \
             File.join(host, context, env, path))
    header = { 'Content-Type' => 'application/x-www-form-urlencoded;charset=utf-8' }
    http   = Net::HTTP.new(url.host, url.port)
    result = http.request_post(url.path, 'json=' + json.to_s, header)
    $log.writer.debug "Writing #{key} with #{value} to cdb"
  rescue => e
    $log.writer.error 'Error: while connecting to configuration database'
    $log.writer.error "Request was: #{url}"
    $log.writer.error e.message
    exit 1
  end

  if result == '@@ERROR@@'
    $log.writer.error 'Error while talking to configuration database, giving up!'
    $log.writer.error "Request was: #{url}"
    exit 1
  end

  result
end