Class: LogStash::Config::Loader

Inherits:
Object
  • Object
show all
Defined in:
lib/logstash/config/loader.rb

Instance Method Summary collapse

Constructor Details

#initialize(logger) ⇒ Loader

Returns a new instance of Loader.



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# File 'lib/logstash/config/loader.rb', line 4

def initialize(logger)
  @logger = logger
  @config_debug = LogStash::SETTINGS.get_value("config.debug")
end

Instance Method Details

#fetch_config(uri) ⇒ Object

def load_config



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# File 'lib/logstash/config/loader.rb', line 100

def fetch_config(uri)
  begin
    Net::HTTP.get(uri) + "\n"
  rescue Exception => e
    fail(I18n.t("logstash.runner.configuration.fetch-failed", :path => uri.to_s, :message => e.message))
  end
end

#format_config(config_path, config_string) ⇒ Object 



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# File 'lib/logstash/config/loader.rb', line 9

def format_config(config_path, config_string)
  config_string = config_string.to_s
  if config_path
    # Append the config string.
    # This allows users to provide both -f and -e flags. The combination
    # is rare, but useful for debugging.
    loaded_config = load_config(config_path)
    if loaded_config.empty? && config_string.empty?
      # If loaded config from `-f` is empty *and* if config string is empty we raise an error
      fail(I18n.t("logstash.runner.configuration.file-not-found", :path => config_path))
    end

    # tell the user we are merging, otherwise it is very confusing
    if !loaded_config.empty? && !config_string.empty?
      @logger.info("Created final config by merging config string and config path", :path => config_path)
    end

    config_string = config_string + loaded_config
  else
    # include a default stdin input if no inputs given
    if config_string !~ /input *{/
      config_string += LogStash::Config::Defaults.input
    end
    # include a default stdout output if no outputs given
    if config_string !~ /output *{/
      config_string += LogStash::Config::Defaults.output
    end
  end
  config_string
end

#load_config(path) ⇒ Object 



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# File 'lib/logstash/config/loader.rb', line 40

def load_config(path)
  begin
    uri = URI.parse(path)

    case uri.scheme
    when nil then
      local_config(path)
    when /http/ then
      fetch_config(uri)
    when "file" then
      local_config(uri.path)
    else
      fail(I18n.t("logstash.runner.configuration.scheme-not-supported", :path => path))
    end
  rescue URI::InvalidURIError
    # fallback for windows.
    # if the parsing of the file failed we assume we can reach it locally.
    # some relative path on windows arent parsed correctly (.\logstash.conf)
    local_config(path)
  end
end

#local_config(path) ⇒ Object 



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# File 'lib/logstash/config/loader.rb', line 62

def local_config(path)
  path = ::File.expand_path(path)
  path = ::File.join(path, "*") if ::File.directory?(path)

  config = ""
  if Dir.glob(path).length == 0
    @logger.info("No config files found in path", :path => path)
    return config
  end

  encoding_issue_files = []
  Dir.glob(path).sort.each do |file|
    next unless ::File.file?(file)
    if file.match(/~$/)
      @logger.debug("NOT reading config file because it is a temp file", :config_file => file)
      next
    end
    @logger.debug("Reading config file", :config_file => file)
    cfg = ::File.read(file)
    if !cfg.ascii_only? && !cfg.valid_encoding?
      encoding_issue_files << file
    end
    config << cfg + "\n"
    if @config_debug
      @logger.debug? && @logger.debug("\nThe following is the content of a file", :config_file => file.to_s)
      @logger.debug? && @logger.debug("\n" + cfg + "\n\n")
    end
  end
  if encoding_issue_files.any?
    fail("The following config files contains non-ascii characters but are not UTF-8 encoded #{encoding_issue_files}")
  end
  if @config_debug
    @logger.debug? && @logger.debug("\nThe following is the merged configuration")
    @logger.debug? && @logger.debug("\n" + config + "\n\n")
  end
  return config
end