Class: AssetSync::Storage

Inherits:
Object
  • Object
show all
Defined in:
lib/asset_sync/storage.rb

Defined Under Namespace

Classes: BucketNotFound

Constant Summary collapse

REGEXP_FINGERPRINTED_FILES = 
/\A(.*)\/(.+)-[^\.]+\.([^\.]+)\z/m
REGEXP_ASSETS_TO_CACHE_CONTROL = 
/-[0-9a-fA-F]{32,}$/
CONTENT_ENCODING = 
{
  'gz' => 'gzip',
  'br' => 'br',
}.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cfg) ⇒ Storage

Returns a new instance of Storage.



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# File 'lib/asset_sync/storage.rb', line 20

def initialize(cfg)
  @config = cfg
end

Instance Attribute Details

#config ⇒ Object

Returns the value of attribute config.



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# File 'lib/asset_sync/storage.rb', line 18

def config
  @config
end

Instance Method Details

#always_upload_files ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 128

def always_upload_files
  expand_file_names(self.config.always_upload) + get_manifest_path
end

#bucket ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 28

def bucket
  # fixes: https://github.com/rumblelabs/asset_sync/issues/18

  @bucket ||= if self.config.backblaze?
                connection.directories.get(self.config.fog_directory)
              else
                connection.directories.get(self.config.fog_directory, :prefix => self.config.assets_prefix)
              end

end

#connection ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 24

def connection
  @connection ||= Fog::Storage.new(self.config.fog_options)
end

#delete_extra_remote_files ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 195

def delete_extra_remote_files
  log "Fetching files to flag for delete"
  remote_files = get_remote_files
  # fixes: https://github.com/rumblelabs/asset_sync/issues/19
  from_remote_files_to_delete = remote_files - local_files - ignored_files - always_upload_files

  log "Flagging #{from_remote_files_to_delete.size} file(s) for deletion"
  # Delete unneeded remote files, if we are on aws delete in bulk else use sequential delete
  if self.config.aws? && connection.respond_to?(:delete_multiple_objects)
    from_remote_files_to_delete.each_slice(500) do |slice|
      connection.delete_multiple_objects(config.fog_directory, slice)
    end
  else
    bucket.files.each do |f|
      delete_file(f, from_remote_files_to_delete)
    end
  end
end

#delete_file(f, remote_files_to_delete) ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 188

def delete_file(f, remote_files_to_delete)
  if remote_files_to_delete.include?(f.key)
    log "Deleting: #{f.key}"
    f.destroy
  end
end

#files_to_invalidate ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 136

def files_to_invalidate
  self.config.invalidate.map { |filename| File.join("/", self.config.assets_prefix, filename) }
end

#files_with_custom_headers ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 132

def files_with_custom_headers
  self.config.custom_headers.inject({}) { |h,(k, v)| h[File.join(self.config.assets_prefix, k)] = v; h; }
end

#get_asset_files_from_manifest ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 143

def get_asset_files_from_manifest
  if self.config.manifest
    if ActionView::Base.respond_to?(:assets_manifest)
      log "Using: Rails 4.0 manifest access"
      manifest = Sprockets::Manifest.new(ActionView::Base.assets_manifest.environment, ActionView::Base.assets_manifest.dir, self.config.manifest_path)
      return manifest.assets.values.map { |f| File.join(self.config.assets_prefix, f) }
    elsif File.exist?(self.config.manifest_path)
      log "Using: Manifest #{self.config.manifest_path}"
      yml = AssetSync.load_yaml(IO.read(self.config.manifest_path))

      return yml.map do |original, compiled|
        # Upload font originals and compiled
        if original =~ /^.+(eot|svg|ttf|woff)$/
          [original, compiled]
        else
          compiled
        end
      end.flatten.map { |f| File.join(self.config.assets_prefix, f) }.uniq!
    else
      log "Warning: Manifest could not be found"
    end
  end
end

#get_local_files ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 167

def get_local_files
  if from_manifest = get_asset_files_from_manifest
    return from_manifest
  end

  log "Using: Directory Search of #{path}/#{self.config.assets_prefix}"
  Dir.chdir(path) do
    to_load = self.config.assets_prefix.present? ? "#{self.config.assets_prefix}/**/**" : '**/**'
    Dir[to_load]
  end
end

#get_manifest_path ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 63

def get_manifest_path
  return [] unless self.config.include_manifest

  if ActionView::Base.respond_to?(:assets_manifest)
    manifest = Sprockets::Manifest.new(ActionView::Base.assets_manifest.environment, ActionView::Base.assets_manifest.dir, self.config.manifest_path)
    manifest_path = manifest.filename
  else
    manifest_path = self.config.manifest_path
  end
  [manifest_path.sub(/^#{path}\//, "")] # full path to relative path
end

#get_remote_files ⇒ Object

Raises:



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# File 'lib/asset_sync/storage.rb', line 179

def get_remote_files
  raise BucketNotFound.new("#{self.config.fog_provider} Bucket: #{self.config.fog_directory} not found.") unless bucket
  # fixes: https://github.com/rumblelabs/asset_sync/issues/16
  #        (work-around for https://github.com/fog/fog/issues/596)
  files = []
  bucket.files.each { |f| files << f.key }
  return files
end

#ignored_files ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 59

def ignored_files
  expand_file_names(self.config.ignored_files)
end

#keep_existing_remote_files? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/asset_sync/storage.rb', line 43

def keep_existing_remote_files?
  self.config.existing_remote_files?
end

#local_files ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 75

def local_files
  @local_files ||=
    (get_local_files + config.additional_local_file_paths).uniq
end

#log(msg) ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 39

def log(msg)
  AssetSync.log(msg)
end

#path ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 47

def path
  self.config.public_path
end

#remote_file_list_cache_file_path ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 51

def remote_file_list_cache_file_path
  self.config.remote_file_list_cache_file_path
end

#remote_file_list_remote_path ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 55

def remote_file_list_remote_path
  self.config.remote_file_list_remote_path
end

#remote_files ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 80

def remote_files
  return [] if ignore_existing_remote_files?
  return @remote_files if @remote_files

  if remote_file_list_remote_path && remote_file_list_cache_file_path
    log "Downloading file list file from remote"
    remote_cache_file = bucket.files.get(remote_file_list_remote_path)
    if remote_cache_file
      File.open(remote_file_list_cache_file_path, 'w') do |local_file|
        local_file.write(remote_cache_file.body)
      end
    end
  end

  if remote_file_list_cache_file_path && File.file?(remote_file_list_cache_file_path)
    begin
      content = File.read(remote_file_list_cache_file_path)
      return @remote_files = JSON.parse(content)
    rescue JSON::ParserError
      warn "Failed to parse #{remote_file_list_cache_file_path} as json"
    end
  end

  @remote_files = get_remote_files
end

#sync ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 358

def sync
  # fixes: https://github.com/rumblelabs/asset_sync/issues/19
  log "AssetSync: Syncing."
  upload_files
  delete_extra_remote_files unless keep_existing_remote_files?
  log "AssetSync: Done."
end

#update_remote_file_list_cache(local_files_to_upload) ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 106

def update_remote_file_list_cache(local_files_to_upload)
  return unless remote_file_list_cache_file_path
  return if ignore_existing_remote_files?

  File.open(self.remote_file_list_cache_file_path, 'w') do |file|
    uploaded = local_files_to_upload + remote_files
    file.write(uploaded.to_json)
  end
end

#update_remote_file_list_in_remote ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 116

def update_remote_file_list_in_remote
  return if ignore_existing_remote_files?
  return unless remote_file_list_remote_path
  return unless remote_file_list_cache_file_path
  log "Updating file list file in remote"
  remote_file = bucket.files.new({
    :key    => remote_file_list_remote_path,
    :body   => File.open(remote_file_list_cache_file_path)
  })
  remote_file.save
end

#upload_file(f) ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 214

def upload_file(f)
  # TODO output files in debug logs as asset filename only.
  one_year = 31557600
  ext = File.extname(f)[1..-1]
  mime = MultiMime.lookup(ext)
  compressed_file_handle = nil
  file_handle = File.open("#{path}/#{f}")
  file = {
    :key => f,
    :body => file_handle,
    :content_type => mime
  }

  # region fog_public

  if config.aws? && config.aws_acl
    file[:acl] = config.aws_acl
  elsif config.fog_public.use_explicit_value?
    file[:public] = config.fog_public.to_bool
  end

  # endregion fog_public

  uncompressed_filename = f.sub(/\.gz\z/, '')
  basename = File.basename(uncompressed_filename, File.extname(uncompressed_filename))

  assets_to_cache_control = Regexp.union([REGEXP_ASSETS_TO_CACHE_CONTROL] | config.cache_asset_regexps).source
  if basename.match(Regexp.new(assets_to_cache_control)).present?
    file.merge!({
      :cache_control => "public, max-age=#{one_year}",
      :expires => CGI.rfc1123_date(Time.now + one_year)
    })
  end

  # overwrite headers if applicable, you probably shouldn't specific key/body, but cache-control headers etc.

  if files_with_custom_headers.has_key? f
    file.merge! files_with_custom_headers[f]
    log "Overwriting #{f} with custom headers #{files_with_custom_headers[f].to_s}"
  elsif key = self.config.custom_headers.keys.detect {|k| f.match(Regexp.new(k))}
    headers = {}
    self.config.custom_headers[key].each do |k, value|
      headers[k.to_sym] = value
    end
    file.merge! headers
    log "Overwriting matching file #{f} with custom headers #{headers.to_s}"
  end


  ignore = false
  if config.compression
    compressed_name = "#{path}/#{f}.#{config.compression}"

    # `File.extname` returns value with `.` prefix, `config.compression` contains value without `.`
    if File.extname(f)[1..-1] == config.compression
      # Don't bother uploading compressed assets if we are in compression mode
      # as we will overwrite file.css with file.css.gz if it exists.
      log "Ignoring: #{f}"
      ignore = true
    elsif File.exist?(compressed_name)
      original_size = File.size("#{path}/#{f}")
      compressed_size = File.size(compressed_name)

      if compressed_size < original_size
        percentage = ((compressed_size.to_f/original_size.to_f)*100).round(2)
        compressed_file_handle = File.open(compressed_name)
        file.merge!({
                      :key => f,
                      :body => compressed_file_handle,
                      :content_encoding => CONTENT_ENCODING[config.compression]
                    })
        log "Uploading: #{compressed_name} in place of #{f} saving #{percentage}%"
      else
        percentage = ((original_size.to_f/compressed_size.to_f)*100).round(2)
        log "Uploading: #{f} instead of #{compressed_name} (compression increases this file by #{percentage}%)"
      end
    end
  else
    compressed_encoding = CONTENT_ENCODING[File.extname(f).delete('.')]
    if compressed_encoding
      # set content encoding for compressed files this allows cloudfront to properly handle requests with Accept-Encoding
      # http://docs.amazonwebservices.com/AmazonCloudFront/latest/DeveloperGuide/ServingCompressedFiles.html
      uncompressed_filename = f[0..-4]
      ext = File.extname(uncompressed_filename)[1..-1]
      mime = MultiMime.lookup(ext)
      file.merge!({
        :content_type     => mime,
        :content_encoding => compressed_encoding
      })
    end
    log "Uploading: #{f}"
  end

  if config.aws? && config.aws_rrs?
    file.merge!({
      :storage_class => 'REDUCED_REDUNDANCY'
    })
  end

  bucket.files.create( file ) unless ignore
  file_handle.close
  compressed_file_handle.close if compressed_file_handle
end

#upload_files ⇒ Object 



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# File 'lib/asset_sync/storage.rb', line 318

def upload_files
  # fixes: https://github.com/rumblelabs/asset_sync/issues/19
  local_files_to_upload = local_files - ignored_files - remote_files + always_upload_files
  local_files_to_upload = (local_files_to_upload + get_non_fingerprinted(local_files_to_upload)).uniq
  # Only files.
  local_files_to_upload = local_files_to_upload.select { |f| File.file? "#{path}/#{f}" }

  if self.config.concurrent_uploads
    jobs = Queue.new
    local_files_to_upload.each { |f| jobs.push(f) }
    jobs.close

    num_threads = [self.config.concurrent_uploads_max_threads, local_files_to_upload.length].min
    # Upload new files
    workers = Array.new(num_threads) do
      Thread.new do
        while f = jobs.pop
          upload_file(f)
        end
      end
    end
    workers.map(&:join)
  else
    # Upload new files
    local_files_to_upload.each do |f|
      upload_file f
    end
  end

  if self.config.cdn_distribution_id && files_to_invalidate.any?
    log "Invalidating Files"
    cdn ||= Fog::CDN.new(self.config.fog_options.except(:region))
    data = cdn.post_invalidation(self.config.cdn_distribution_id, files_to_invalidate)
    log "Invalidation id: #{data.body["Id"]}"
  end

  update_remote_file_list_cache(local_files_to_upload)
  update_remote_file_list_in_remote
end