Class: Mongoid::GridFs
- Inherits:
-
Object
- Object
- Mongoid::GridFs
- Defined in:
- lib/mongoid/grid_fs.rb,
lib/mongoid/grid_fs/version.rb
Defined Under Namespace
Constant Summary collapse
- NamespaceMixin =
proc do class << self attr_accessor :prefix attr_accessor :file_model attr_accessor :chunk_model def to_s prefix end def namespace prefix end def put(readable, attributes = {}) file = file_model.create attributes. file.id = attributes.delete(:id) if attributes.key?(:id) file.id = attributes.delete(:_id) if attributes.key?(:_id) attributes[:contentType] = attributes.delete(:content_type) if attributes.key?(:content_type) attributes[:uploadDate] = attributes.delete(:upload_date) if attributes.key?(:upload_date) attributes[:metadata] = attributes.delete(:meta_data) if attributes.key?(:meta_data) attributes[:aliases] = Array(attributes.delete(:aliases)).flatten.compact.map(&:to_s) if attributes.key?(:aliases) md5 = Digest::MD5.new length = 0 chunkSize = file.chunkSize n = 0 GridFs.reading(readable) do |io| unless attributes.key?(:filename) attributes[:filename] = [file.id.to_s, GridFs.extract_basename(io)].join('/').squeeze('/') end unless attributes.key?(:contentType) attributes[:contentType] = GridFs.extract_content_type(attributes[:filename]) || file.contentType end GridFs.chunking(io, chunkSize) do |buf| md5 << buf length += buf.size file.chunks.create(data: binary_for(buf), n: n) n += 1 end end attributes[:length] ||= length attributes[:uploadDate] ||= Time.now.utc attributes[:md5] ||= md5.hexdigest file.update_attributes(attributes) file rescue StandardError file.destroy raise end def binary_for(*buf) if defined?(Moped::BSON) Moped::BSON::Binary.new(:generic, buf.join) else BSON::Binary.new(buf.join, :generic) end end def get(id) file_model.find(id) end def delete(id) file_model.find(id).destroy rescue StandardError nil end def where(conditions = {}) case conditions when String file_model.where(filename: conditions) else file_model.where(conditions) end end def find(*args) where(*args).first end def [](filename) file_model .where(filename: filename.to_s) .order_by(uploadDate: :desc) .limit(1) .first end def []=(filename, readable) put(readable, filename: filename.to_s) end def clear file_model.destroy_all end # TODO: - opening with a mode = 'w' should return a GridIO::IOProxy # implementing a StringIO-like interface # def open(_filename, _mode = 'r') raise NotImplementedError end end end
- MIME_TYPES =
{ 'md' => 'text/x-markdown; charset=UTF-8' }.freeze
- Helper =
Mongoid::GridFsHelper
- VERSION =
'2.5.0'.freeze
Class Attribute Summary collapse
-
.chunk_model ⇒ Object
Returns the value of attribute chunk_model.
-
.file_model ⇒ Object
Returns the value of attribute file_model.
-
.namespace ⇒ Object
Returns the value of attribute namespace.
Class Method Summary collapse
- .build_chunk_model_for(namespace) ⇒ Object
- .build_file_model_for(namespace) ⇒ Object
- .build_namespace_for(prefix) ⇒ Object
- .chunking(io, chunk_size, &block) ⇒ Object
- .cleanname(pathname) ⇒ Object
- .extract_basename(object) ⇒ Object
- .extract_content_type(filename, options = {}) ⇒ Object
- .extract_extension(content_type) ⇒ Object
- .init! ⇒ Object
- .mime_types ⇒ Object
- .namespace_for(prefix) ⇒ Object
- .reading(arg, &block) ⇒ Object
- .rewind(io, &block) ⇒ Object
Class Attribute Details
.chunk_model ⇒ Object
Returns the value of attribute chunk_model.
11 12 13 |
# File 'lib/mongoid/grid_fs.rb', line 11 def chunk_model @chunk_model end |
.file_model ⇒ Object
Returns the value of attribute file_model.
10 11 12 |
# File 'lib/mongoid/grid_fs.rb', line 10 def file_model @file_model end |
.namespace ⇒ Object
Returns the value of attribute namespace.
9 10 11 |
# File 'lib/mongoid/grid_fs.rb', line 9 def namespace @namespace end |
Class Method Details
.build_chunk_model_for(namespace) ⇒ Object
399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 |
# File 'lib/mongoid/grid_fs.rb', line 399 def self.build_chunk_model_for(namespace) prefix = namespace.name.split(/::/).last.downcase file_model_name = "#{namespace.name}::File" chunk_model_name = "#{namespace.name}::Chunk" Class.new do include Mongoid::Document singleton_class = class << self; self; end singleton_class.instance_eval do define_method(:name) { chunk_model_name } attr_accessor :file_model attr_accessor :namespace end store_in collection: "#{prefix}.chunks" field(:n, type: Integer, default: 0) field(:data, type: (defined?(Moped::BSON) ? Moped::BSON::Binary : BSON::Binary)) belongs_to(:file, foreign_key: :files_id, class_name: file_model_name) index({ files_id: 1, n: -1 }, unique: true) def namespace self.class.namespace end def to_s data.data end alias_method 'to_str', 'to_s' end end |
.build_file_model_for(namespace) ⇒ Object
229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 |
# File 'lib/mongoid/grid_fs.rb', line 229 def self.build_file_model_for(namespace) prefix = namespace.name.split(/::/).last.downcase file_model_name = "#{namespace.name}::File" chunk_model_name = "#{namespace.name}::Chunk" Class.new do include Mongoid::Document include Mongoid::Attributes::Dynamic if Mongoid::VERSION.to_i >= 4 singleton_class = class << self; self; end singleton_class.instance_eval do define_method(:name) { file_model_name } attr_accessor :namespace attr_accessor :chunk_model attr_accessor :defaults end store_in collection: "#{prefix}.files" self.defaults = Defaults.new defaults.chunkSize = 4 * (2**20) defaults.contentType = 'application/octet-stream' field(:length, type: Integer, default: 0) field(:chunkSize, type: Integer, default: defaults.chunkSize) field(:uploadDate, type: Time, default: Time.now.utc) field(:md5, type: String, default: Digest::MD5.hexdigest('')) field(:filename, type: String) field(:contentType, type: String, default: defaults.contentType) field(:aliases, type: Array) begin field(:metadata) rescue StandardError nil end required = %w[length chunkSize uploadDate md5] required.each do |f| validates_presence_of(f) end index(filename: 1) index(aliases: 1) index(uploadDate: 1) index(md5: 1) has_many(:chunks, class_name: chunk_model_name, inverse_of: :files, dependent: :destroy, order: %i[n asc]) def path filename end def basename ::File.basename(filename) if filename end def (*paths) return basename if basename if paths.empty? paths.push('attachment') paths.push(id.to_s) paths.push(updateDate.iso8601) end path = paths.join('--') base = ::File.basename(path).split('.', 2).first ext = GridFs.extract_extension(contentType) "#{base}.#{ext}" end def prefix self.class.namespace.prefix end def each fetched = 0 limit = 7 while fetched < chunks.size chunks.where(:n.lt => fetched + limit, :n.gte => fetched) .order_by(%i[n asc]).each do |chunk| yield(chunk.to_s) end fetched += limit end end def slice(*args) case args.first when Range range = args.first first_chunk = (range.min / chunkSize).floor last_chunk = (range.max / chunkSize).floor offset = range.min % chunkSize length = range.max - range.min + 1 when Integer start = args.first start = self.length + start if start < 0 length = args.size == 2 ? args.last : 1 first_chunk = (start / chunkSize).floor last_chunk = ((start + length) / chunkSize).floor offset = start % chunkSize end data = '' chunks.where(n: (first_chunk..last_chunk)).order_by(n: 'asc').each do |chunk| data << chunk end data[offset, length] end def data data = '' each { |chunk| data << chunk } data end def base64 Array(to_s).pack('m') end def data_uri( = {}) data = base64.chomp "data:#{content_type};base64,".concat(data) end def bytes(&block) if block each { |data| yield(data) } length else bytes = [] each { |data| bytes.push(*data) } bytes end end def close self end def content_type contentType end def update_date updateDate end def created_at updateDate end def namespace self.class.namespace end end end |
.build_namespace_for(prefix) ⇒ Object
54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 |
# File 'lib/mongoid/grid_fs.rb', line 54 def self.build_namespace_for(prefix) prefix = prefix.to_s.downcase const = prefix.camelize namespace = Module.new do module_eval(&NamespaceMixin) self end const_set(const, namespace) file_model = build_file_model_for(namespace) chunk_model = build_chunk_model_for(namespace) file_model.namespace = namespace chunk_model.namespace = namespace file_model.chunk_model = chunk_model chunk_model.file_model = file_model namespace.prefix = prefix namespace.file_model = file_model namespace.chunk_model = chunk_model namespace.send(:const_set, :File, file_model) namespace.send(:const_set, :Chunk, chunk_model) # at_exit{ file_model.create_indexes rescue nil } # at_exit{ chunk_model.create_indexes rescue nil } const_get(const) end |
.chunking(io, chunk_size, &block) ⇒ Object
450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 |
# File 'lib/mongoid/grid_fs.rb', line 450 def self.chunking(io, chunk_size, &block) if io.method(:read).arity.zero? data = io.read i = 0 loop do offset = i * chunk_size length = i + chunk_size < data.size ? chunk_size : data.size - offset break if offset >= data.size buf = data[offset, length] block.call(buf) i += 1 end else while (buf = io.read(chunk_size)) block.call(buf) end end end |
.cleanname(pathname) ⇒ Object
544 545 546 547 |
# File 'lib/mongoid/grid_fs.rb', line 544 def self.cleanname(pathname) basename = ::File.basename(pathname.to_s) CGI.unescape(basename).gsub(/[^0-9a-zA-Z_@)(~.-]/, '_').gsub(/_+/, '_') end |
.extract_basename(object) ⇒ Object
491 492 493 494 495 496 497 498 499 500 501 502 |
# File 'lib/mongoid/grid_fs.rb', line 491 def self.extract_basename(object) filename = nil %i[original_path original_filename path filename pathname].each do |msg| if object.respond_to?(msg) filename = object.send(msg) break end end filename ? cleanname(filename) : nil end |
.extract_content_type(filename, options = {}) ⇒ Object
512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 |
# File 'lib/mongoid/grid_fs.rb', line 512 def self.extract_content_type(filename, = {}) . basename = ::File.basename(filename.to_s) parts = basename.split('.') parts.shift ext = parts.pop default = if [:default] == false nil elsif [:default] == true 'application/octet-stream' else ([:default] || 'application/octet-stream').to_s end content_type = mime_types[ext] || MIME::Types.type_for(::File.basename(filename.to_s)).first if content_type content_type.to_s else default end end |
.extract_extension(content_type) ⇒ Object
538 539 540 541 542 |
# File 'lib/mongoid/grid_fs.rb', line 538 def self.extract_extension(content_type) list = MIME::Types[content_type.to_s] type = list.first type.extensions.first if type end |
.init! ⇒ Object
13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 |
# File 'lib/mongoid/grid_fs.rb', line 13 def init! GridFs.build_namespace_for(:Fs) GridFs.namespace = Fs GridFs.file_model = Fs.file_model GridFs.chunk_model = Fs.chunk_model const_set(:File, Fs.file_model) const_set(:Chunk, Fs.chunk_model) to_delegate = %w( put get delete find [] []= clear ) to_delegate.each do |method| class_eval <<-__ def self.#{method}(*args, &block) ::Mongoid::GridFs::Fs::#{method}(*args, &block) end __ end end |
.mime_types ⇒ Object
508 509 510 |
# File 'lib/mongoid/grid_fs.rb', line 508 def self.mime_types MIME_TYPES end |
.namespace_for(prefix) ⇒ Object
45 46 47 48 49 50 |
# File 'lib/mongoid/grid_fs.rb', line 45 def self.namespace_for(prefix) prefix = prefix.to_s.downcase const = "::GridFs::#{prefix.to_s.camelize}" namespace = const.split(/::/).last const_defined?(namespace) ? const_get(namespace) : build_namespace_for(namespace) end |
.reading(arg, &block) ⇒ Object
438 439 440 441 442 443 444 445 446 447 448 |
# File 'lib/mongoid/grid_fs.rb', line 438 def self.reading(arg, &block) if arg.respond_to?(:read) rewind(arg) do |io| block.call(io) end else open(arg.to_s) do |io| block.call(io) end end end |
.rewind(io, &block) ⇒ Object
471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 |
# File 'lib/mongoid/grid_fs.rb', line 471 def self.rewind(io, &block) begin pos = io.pos io.flush io.rewind rescue StandardError nil end begin block.call(io) ensure begin io.pos = pos rescue StandardError nil end end end |