Class: Aspera::Cli::Plugins::Preview

Inherits:
BasicAuthPlugin show all
Defined in:
lib/aspera/cli/plugins/preview.rb

Constant Summary collapse

ACTIONS = 
i[scan events trevents check test].freeze

Constants inherited from Aspera::Cli::Plugin

Aspera::Cli::Plugin::ALL_OPS, Aspera::Cli::Plugin::GLOBAL_OPS, Aspera::Cli::Plugin::INSTANCE_OPS, Aspera::Cli::Plugin::MAX_ITEMS, Aspera::Cli::Plugin::MAX_PAGES, Aspera::Cli::Plugin::REGEX_LOOKUP_ID_BY_FIELD, Aspera::Cli::Plugin::VAL_ALL

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from BasicAuthPlugin

#basic_auth_api, #basic_auth_params, register_options

Methods inherited from Aspera::Cli::Plugin

#do_bulk_operation, #entity_action, #entity_command, #instance_identifier, #old_query_read_delete, #query_read_delete, #value_create_modify, #value_or_query

Constructor Details

#initialize(env) ⇒ Preview

Returns a new instance of Preview.



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# File 'lib/aspera/cli/plugins/preview.rb', line 46

def initialize(env)
  super(env)
  @skip_types = []
  @default_transfer_spec = nil
  # by default generate all supported formats (clone, as altered by options)
  @preview_formats_to_generate = Aspera::Preview::Generator::PREVIEW_FORMATS.clone
  # options for generation
  @gen_options = Aspera::Preview::Options.new
  # used to trigger periodic processing
  @periodic = TimerLimiter.new(LOG_LIMITER_SEC)
  # link CLI options to gen_info attributes
  options.declare(
    :skip_format, 'Skip this preview format (multiple possible)', values: Aspera::Preview::Generator::PREVIEW_FORMATS,
    handler: {o: self, m: :option_skip_format}, default: [])
  options.declare(
    :folder_reset_cache, 'Force detection of generated preview by refresh cache',
    values: i[no header read],
    handler: {o: self, m: :option_folder_reset_cache},
    default: :no)
  options.declare(:skip_types, 'Skip types in comma separated list', handler: {o: self, m: :option_skip_types})
  options.declare(:previews_folder, 'Preview folder in storage root', handler: {o: self, m: :option_previews_folder}, default: DEFAULT_PREVIEWS_FOLDER)
  options.declare(:temp_folder, 'Path to temp folder', default: Dir.tmpdir)
  options.declare(:skip_folders, 'List of folder to skip', handler: {o: self, m: :option_skip_folders}, default: [])
  options.declare(:case, 'Basename of output for for test')
  options.declare(:scan_path, 'Subpath in folder id to start scan in (default=/)')
  options.declare(:scan_id, 'Folder id in storage to start scan in, default is access key main folder id')
  options.declare(:mimemagic, 'Use Mime type detection of gem mimemagic', values: :bool, default: false)
  options.declare(:overwrite, 'When to overwrite result file', values: i[always never mtime], handler: {o: self, m: :option_overwrite}, default: :mtime)
  options.declare(
    :file_access, 'How to read and write files in repository',
    values: i[local remote],
    handler: {o: self, m: :option_file_access},
    default: :local)

  # add other options for generator (and set default values)
  Aspera::Preview::Options::DESCRIPTIONS.each do |opt|
    values = if opt.key?(:values)
      opt[:values]
    elsif Cli::Manager::BOOLEAN_SIMPLE.include?(opt[:default])
      :bool
    end
    options.declare(opt[:name], opt[:description].capitalize, values: values, handler: {o: @gen_options, m: opt[:name]}, default: opt[:default])
  end

  options.parse_options!
  raise 'skip_folder shall be an Array, use @json:[...]' unless @option_skip_folders.is_a?(Array)
  @tmp_folder = File.join(options.get_option(:temp_folder, mandatory: true), "#{TMP_DIR_PREFIX}.#{SecureRandom.uuid}")
  FileUtils.mkdir_p(@tmp_folder)
  Log.log.debug{"tmpdir: #{@tmp_folder}"}
end

Instance Attribute Details

#option_file_access ⇒ Object

Returns the value of attribute option_file_access.



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# File 'lib/aspera/cli/plugins/preview.rb', line 44

def option_file_access
  @option_file_access
end

#option_folder_reset_cache ⇒ Object

Returns the value of attribute option_folder_reset_cache.



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# File 'lib/aspera/cli/plugins/preview.rb', line 44

def option_folder_reset_cache
  @option_folder_reset_cache
end

#option_overwrite ⇒ Object

Returns the value of attribute option_overwrite.



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# File 'lib/aspera/cli/plugins/preview.rb', line 44

def option_overwrite
  @option_overwrite
end

#option_previews_folder ⇒ Object

option_skip_format has special accessors



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# File 'lib/aspera/cli/plugins/preview.rb', line 43

def option_previews_folder
  @option_previews_folder
end

#option_skip_folders ⇒ Object

Returns the value of attribute option_skip_folders.



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# File 'lib/aspera/cli/plugins/preview.rb', line 44

def option_skip_folders
  @option_skip_folders
end

Instance Method Details

#do_transfer(direction, folder_id, source_filename, destination = '/') ⇒ Object 



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# File 'lib/aspera/cli/plugins/preview.rb', line 207

def do_transfer(direction, folder_id, source_filename, destination='/')
  raise 'Internal ERROR' if destination.nil? && direction.eql?(Fasp::TransferSpec::DIRECTION_RECEIVE)
  t_spec = @api_node.transfer_spec_gen4(folder_id, direction, {
    'paths' => [{'source' => source_filename}],
    'tags'  => {Fasp::TransferSpec::TAG_RESERVED => {PREV_GEN_TAG => true}}
  })
  # force destination, need to set this in transfer agent else it gets overwritten, not do: t_spec['destination_root']=destination
  transfer.option_transfer_spec_deep_merge({'destination_root' => destination})
  Main.result_transfer(transfer.start(t_spec))
end

#entry_preview_folder_name(entry) ⇒ Object

defined by node api



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# File 'lib/aspera/cli/plugins/preview.rb', line 254

def entry_preview_folder_name(entry)
  "#{entry['id']}#{PREVIEW_FOLDER_SUFFIX}"
end

#execute_action ⇒ Object 



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# File 'lib/aspera/cli/plugins/preview.rb', line 391

def execute_action
  command = options.get_next_command(ACTIONS)
  unless i[check test].include?(command)
    # this will use node api
    @api_node = Aspera::Node.new(params: basic_auth_params)
    @transfer_server_address = URI.parse(@api_node.params[:base_url]).host
    # get current access key
    @access_key_self = @api_node.read('access_keys/self')[:data]
    # TODO: check events is activated here:
    # note that docroot is good to look at as well
    node_info = @api_node.read('info')[:data]
    Log.log.debug{"root: #{node_info['docroot']}"}
    @access_remote = @option_file_access.eql?(:remote)
    Log.log.debug{"remote: #{@access_remote}"}
    Log.log.debug{"access key info: #{@access_key_self}"}
    # TODO: can the previews folder parameter be read from node api ?
    @option_skip_folders.push('/' + @option_previews_folder)
    if @access_remote
      # NOTE: the filter "name", it's why we take the first one
      @previews_folder_entry = get_folder_entries(@access_key_self['root_file_id'], {name: @option_previews_folder}).first
      raise CliError, "Folder #{@option_previews_folder} does not exist on node. "\
        'Please create it in the storage root, or specify an alternate name.' if @previews_folder_entry.nil?
    else
      raise 'only local storage allowed in this mode' unless @access_key_self['storage']['type'].eql?('local')
      @local_storage_root = @access_key_self['storage']['path']
      # TODO: option to override @local_storage_root='xxx'
      @local_storage_root = @local_storage_root[PVCL_LOCAL_STORAGE.length..-1] if @local_storage_root.start_with?(PVCL_LOCAL_STORAGE)
      # TODO: windows could have "C:" ?
      raise "not local storage: #{@local_storage_root}" unless @local_storage_root.start_with?('/')
      raise CliError, "Local storage root folder #{@local_storage_root} does not exist." unless File.directory?(@local_storage_root)
      @local_preview_folder = File.join(@local_storage_root, @option_previews_folder)
      raise CliError, "Folder #{@local_preview_folder} does not exist locally. "\
        'Please create it, or specify an alternate name.' unless File.directory?(@local_preview_folder)
      # protection to avoid clash of file id for two different access keys
      marker_file = File.join(@local_preview_folder, AK_MARKER_FILE)
      Log.log.debug{"marker file: #{marker_file}"}
      if File.exist?(marker_file)
        ak = File.read(marker_file).chomp
        raise "mismatch access key in #{marker_file}: contains #{ak}, using #{@access_key_self['id']}" unless @access_key_self['id'].eql?(ak)
      else
        File.write(marker_file, @access_key_self['id'])
      end
    end
  end
  Aspera::Preview::FileTypes.instance.use_mimemagic = options.get_option(:mimemagic, mandatory: true)
  # check tools that are anyway required for all cases
  Aspera::Preview::Utils.check_tools(@skip_types)
  case command
  when :scan
    scan_path = options.get_option(:scan_path)
    scan_id = options.get_option(:scan_id)
    # by default start at root
    folder_info =
      if scan_id.nil?
        {
          'id'   => @access_key_self['root_file_id'],
          'name' => '/',
          'type' => 'folder',
          'path' => '/' }
      else
        @api_node.read("files/#{scan_id}")[:data]
      end
    scan_folder_files(folder_info, scan_path)
    return Main.result_status('scan finished')
  when :events, :trevents
    iteration_persistency = nil
    if options.get_option(:once_only, mandatory: true)
      iteration_persistency = PersistencyActionOnce.new(
        manager: @agents[:persistency],
        data:    [],
        id:      IdGenerator.from_list([
          'preview_iteration',
          command.to_s,
          options.get_option(:url, mandatory: true),
          options.get_option(:username, mandatory: true)
        ]))
    end
    # call processing method specified by command line command
    send("process_#{command}", iteration_persistency)
    return Main.result_status("#{command} finished")
  when :check
    return Main.result_status('Tools validated')
  when :test
    format = options.get_next_argument('format', expected: Aspera::Preview::Generator::PREVIEW_FORMATS)
    source = options.get_next_argument('source file')
    dest = preview_filename(format, options.get_option(:case))
    g = Aspera::Preview::Generator.new(@gen_options, source, dest, @tmp_folder, nil)
    raise "cannot find file type for #{source}" if g.conversion_type.nil?
    raise "out format #{format} not supported" unless g.supported?
    g.generate
    return Main.result_status("generated: #{dest}")
  else
    raise 'error'
  end
ensure
  Log.log.debug{"cleaning up temp folder #{@tmp_folder}"}
  FileUtils.rm_rf(@tmp_folder)
end

#generate_preview(entry) ⇒ Object

generate preview files for one folder entry (file) if necessary entry must contain “parent_file_id” if remote.



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# File 'lib/aspera/cli/plugins/preview.rb', line 265

def generate_preview(entry)
  # prepare generic information
  gen_infos = @preview_formats_to_generate.map do |preview_format|
    {
      preview_format: preview_format,
      base_dest:      preview_filename(preview_format)
    }
  end
  # lets gather some infos on possibly existing previews
  # it depends if files access locally or remotely
  # folder where previews will be generated for this particular entry
  local_entry_preview_dir = @access_remote ? get_infos_remote(gen_infos, entry) : get_infos_local(gen_infos, entry)
  # here we have the status on preview files
  # let's find if they need generation
  gen_infos.select! do |gen_info|
    # if it exists, what about overwrite policy ?
    if gen_info[:preview_exist]
      case @option_overwrite
      when :always
        # continue: generate
      when :never
        # never overwrite
        next false
      when :mtime
        # skip if preview is newer than original
        next false if gen_info[:preview_newer_than_original]
      end
    end
    # need generator for further checks
    gen_info[:generator] = Aspera::Preview::Generator.new(@gen_options, gen_info[:src], gen_info[:dst], @tmp_folder, entry['content_type'])
    # get conversion_type (if known) and check if supported
    next false unless gen_info[:generator].supported?
    # shall we skip it ?
    next false if @skip_types.include?(gen_info[:generator].conversion_type)
    # ok we need to generate
    true
  end
  return if gen_infos.empty?
  # create folder if needed
  FileUtils.mkdir_p(local_entry_preview_dir)
  if @access_remote
    raise 'missing parent_file_id in entry' if entry['parent_file_id'].nil?
    #  download original file to temp folder
    do_transfer(Fasp::TransferSpec::DIRECTION_RECEIVE, entry['parent_file_id'], entry['name'], @tmp_folder)
  end
  Log.log.info{"source: #{entry['id']}: #{entry['path']})"}
  gen_infos.each do |gen_info|
    gen_info[:generator].generate rescue nil
  end
  if @access_remote
    # upload
    do_transfer(Fasp::TransferSpec::DIRECTION_SEND, @previews_folder_entry['id'], local_entry_preview_dir)
    # cleanup after upload
    FileUtils.rm_rf(local_entry_preview_dir)
    File.delete(File.join(@tmp_folder, entry['name']))
  end
  # force read file updated previews
  if @option_folder_reset_cache.eql?(:read)
    @api_node.read("files/#{entry['id']}")
  end
rescue StandardError => e
  Log.log.error{"Ignore: #{e.message}"}
  Log.log.debug(e.backtrace.join("\n").red)
end

#get_folder_entries(file_id, request_args = nil) ⇒ Object

/files/id/files is normally cached in redis, but we can discard the cache but /files/id is not cached



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# File 'lib/aspera/cli/plugins/preview.rb', line 120

def get_folder_entries(file_id, request_args=nil)
  headers = {'Accept' => 'application/json'}
  headers['X-Aspera-Cache-Control'] = 'no-cache' if @option_folder_reset_cache.eql?(:header)
  return @api_node.call({operation: 'GET', subpath: "files/#{file_id}/files", headers: headers, url_params: request_args})[:data]
  # return @api_node.read("files/#{file_id}/files",request_args)[:data]
end

#get_infos_local(gen_infos, entry) ⇒ Object 



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# File 'lib/aspera/cli/plugins/preview.rb', line 218

def get_infos_local(gen_infos, entry)
  local_original_filepath = File.join(@local_storage_root, entry['path'])
  original_mtime = File.mtime(local_original_filepath)
  # out
  local_entry_preview_dir = File.join(@local_preview_folder, entry_preview_folder_name(entry))
  gen_infos.each do |gen_info|
    gen_info[:src] = local_original_filepath
    gen_info[:dst] = File.join(local_entry_preview_dir, gen_info[:base_dest])
    gen_info[:preview_exist] = File.exist?(gen_info[:dst])
    gen_info[:preview_newer_than_original] = (gen_info[:preview_exist] && (File.mtime(gen_info[:dst]) > original_mtime))
  end
  return local_entry_preview_dir
end

#get_infos_remote(gen_infos, entry) ⇒ Object 



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# File 'lib/aspera/cli/plugins/preview.rb', line 232

def get_infos_remote(gen_infos, entry)
  # store source directly here
  local_original_filepath = File.join(@tmp_folder, entry['name'])
  # original_mtime=DateTime.parse(entry['modified_time'])
  # out: where previews are generated
  local_entry_preview_dir = File.join(@tmp_folder, entry_preview_folder_name(entry))
  file_info = @api_node.read("files/#{entry['id']}")[:data]
  # TODO: this does not work because previews is hidden in api (gen4)
  # this_preview_folder_entries=get_folder_entries(@previews_folder_entry['id'],{name: @entry_preview_folder_name})
  # TODO: use gen3 api to list files and get date
  gen_infos.each do |gen_info|
    gen_info[:src] = local_original_filepath
    gen_info[:dst] = File.join(local_entry_preview_dir, gen_info[:base_dest])
    # TODO: use this_preview_folder_entries (but it's hidden)
    gen_info[:preview_exist] = file_info.key?('preview')
    # TODO: get change time and compare, useful ?
    gen_info[:preview_newer_than_original] = gen_info[:preview_exist]
  end
  return local_entry_preview_dir
end

#option_skip_format ⇒ Object 



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# File 'lib/aspera/cli/plugins/preview.rb', line 114

def option_skip_format
  return @preview_formats_to_generate.map(&:to_s).join(',')
end

#option_skip_format=(value) ⇒ Object 



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# File 'lib/aspera/cli/plugins/preview.rb', line 110

def option_skip_format=(value)
  @preview_formats_to_generate.delete(value)
end

#option_skip_types ⇒ Object 



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# File 'lib/aspera/cli/plugins/preview.rb', line 106

def option_skip_types
  return @skip_types.map(&:to_s).join(',')
end

#option_skip_types=(value) ⇒ Object 



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# File 'lib/aspera/cli/plugins/preview.rb', line 97

def option_skip_types=(value)
  @skip_types = []
  value.split(',').each do |v|
    s = v.to_sym
    raise "not supported: #{v}" unless Aspera::Preview::FileTypes::CONVERSION_TYPES.include?(s)
    @skip_types.push(s)
  end
end

#preview_filename(preview_format, filename = nil) ⇒ Object 



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# File 'lib/aspera/cli/plugins/preview.rb', line 258

def preview_filename(preview_format, filename=nil)
  filename ||= PREVIEW_BASENAME
  return "#{filename}.#{preview_format}"
end

#process_events(iteration_persistency) ⇒ Object

requests recent events on node api and process newly modified folders



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# File 'lib/aspera/cli/plugins/preview.rb', line 171

def process_events(iteration_persistency)
  # get new file creation by access key (TODO: what if file already existed?)
  events_filter = {
    'access_key' => @access_key_self['id'],
    'type'       => 'file.*'
  }
  # optionally add iteration token from persistency
  events_filter['iteration_token'] = iteration_persistency.data.first unless iteration_persistency.nil?
  events = @api_node.read('events', events_filter)[:data]
  return if events.empty?
  events.each do |event|
    # process only files
    if event.dig('data', 'type').eql?('file')
      file_entry = @api_node.read("files/#{event['data']['id']}")[:data] rescue nil
      if !file_entry.nil? &&
          @option_skip_folders.select{|d|file_entry['path'].start_with?(d)}.empty?
        file_entry['parent_file_id'] = event['data']['parent_file_id']
        if event['types'].include?('file.deleted')
          Log.log.error('TODO'.red)
        end
        if event['types'].include?('file.deleted')
          generate_preview(file_entry)
        end
      end
    end
    # log/persist periodically or last one
    next unless @periodic.trigger? || event.equal?(events.last)
    Log.log.info{"Processing event #{event['id']}"}
    # save checkpoint to avoid losing processing in case of error
    if !iteration_persistency.nil?
      iteration_persistency.data[0] = event['id'].to_s
      iteration_persistency.save
    end
  end
end

#process_trevents(iteration_persistency) ⇒ Object

old version based on folders

Parameters:

  • iteration_persistency —

    can be nil



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# File 'lib/aspera/cli/plugins/preview.rb', line 129

def process_trevents(iteration_persistency)
  events_filter = {
    'access_key' => @access_key_self['id'],
    'type'       => 'download.ended'
  }
  # optionally add iteration token from persistency
  events_filter['iteration_token'] = iteration_persistency.data.first unless iteration_persistency.nil?
  begin
    events = @api_node.read('events', events_filter)[:data]
  rescue RestCallError => e
    if e.message.include?('Invalid iteration_token')
      Log.log.warn{"Retrying without iteration token: #{e}"}
      events_filter.delete('iteration_token')
      retry
    end
    raise e
  end
  return if events.empty?
  events.each do |event|
    if event['data']['direction'].eql?(Fasp::TransferSpec::DIRECTION_RECEIVE) &&
        event['data']['status'].eql?('completed') &&
        event['data']['error_code'].eql?(0) &&
        event['data'].dig('tags', Fasp::TransferSpec::TAG_RESERVED, PREV_GEN_TAG).nil?
      folder_id = event.dig('data', 'tags', Fasp::TransferSpec::TAG_RESERVED, 'node', 'file_id')
      folder_id ||= event.dig('data', 'file_id')
      if !folder_id.nil?
        folder_entry = @api_node.read("files/#{folder_id}")[:data] rescue nil
        scan_folder_files(folder_entry) unless folder_entry.nil?
      end
    end
    # log/persist periodically or last one
    next unless @periodic.trigger? || event.equal?(events.last)
    Log.log.info{"Processed event #{event['id']}"}
    # save checkpoint to avoid losing processing in case of error
    if !iteration_persistency.nil?
      iteration_persistency.data[0] = event['id'].to_s
      iteration_persistency.save
    end
  end
end

#scan_folder_files(top_entry, scan_start = nil) ⇒ Object

scan all files in provided folder entry

Parameters:

  • scan_start (defaults to: nil) —

    subpath to start folder scan inside



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# File 'lib/aspera/cli/plugins/preview.rb', line 332

def scan_folder_files(top_entry, scan_start=nil)
  if !scan_start.nil?
    # canonical path: start with / and ends with /
    scan_start = '/' + scan_start.split('/').reject(&:empty?).join('/')
    scan_start = "#{scan_start}/" # unless scan_start.end_with?('/')
  end
  filter_block = Aspera::Node.file_matcher(value_or_query(allowed_types: String))
  Log.log.debug{"scan: #{top_entry} : #{scan_start}".green}
  # don't use recursive call, use list instead
  entries_to_process = [top_entry]
  until entries_to_process.empty?
    entry = entries_to_process.shift
    # process this entry only if it is within the scan_start
    entry_path_with_slash = entry['path']
    Log.log.info{"processing entry #{entry_path_with_slash}"} if @periodic.trigger?
    entry_path_with_slash = "#{entry_path_with_slash}/" unless entry_path_with_slash.end_with?('/')
    if !scan_start.nil? && !scan_start.start_with?(entry_path_with_slash) && !entry_path_with_slash.start_with?(scan_start)
      Log.log.debug{"#{entry['path']} folder (skip start)".bg_red}
      next
    end
    Log.log.debug{"item:#{entry}"}
    begin
      case entry['type']
      when 'file'
        if filter_block.call(entry)
          generate_preview(entry)
        else
          Log.log.debug('skip by filter')
        end
      when 'link'
        Log.log.debug('Ignoring link.')
      when 'folder'
        if @option_skip_folders.include?(entry['path'])
          Log.log.debug{"#{entry['path']} folder (skip list)".bg_red}
        else
          Log.log.debug{"#{entry['path']} folder".green}
          # get folder content
          folder_entries = get_folder_entries(entry['id'])
          # process all items in current folder
          folder_entries.each do |folder_entry|
            # add path for older versions of ES
            if !folder_entry.key?('path')
              folder_entry['path'] = entry_path_with_slash + folder_entry['name']
            end
            folder_entry['parent_file_id'] = entry['id']
            entries_to_process.push(folder_entry)
          end
        end
      else
        Log.log.warn{"unknown entry type: #{entry['type']}"}
      end
    rescue StandardError => e
      Log.log.warn{"An error occurred: #{e}, ignoring"}
    end
  end
end