Class: FakeS3::FileStore

Inherits:
Object
  • Object
show all
Defined in:
lib/fakes3/file_store.rb

Constant Summary collapse

SHUCK_METADATA_DIR = 
".fakes3_metadataFFF"
SUBSECOND_PRECISION =

S3 clients with overly strict date parsing fails to parse ISO 8601 dates without any sub second precision (e.g. jets3t v0.7.2), and the examples given in the official AWS S3 documentation specify three (3) decimals for sub second precision.

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Instance Method Summary collapse

Constructor Details

#initialize(root) ⇒ FileStore

Returns a new instance of FileStore.



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# File 'lib/fakes3/file_store.rb', line 18

def initialize(root)
  @root = root
  @buckets = []
  @bucket_hash = {}
  Dir[File.join(root,"*")].each do |bucket|
    bucket_name = File.basename(bucket)
    bucket_obj = Bucket.new(bucket_name,Time.now,[])
    @buckets << bucket_obj
    @bucket_hash[bucket_name] = bucket_obj
  end
end

Instance Method Details

#buckets ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 49

def buckets
  @buckets
end

#combine_object_parts(bucket, upload_id, object_name, parts, request) ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 216

def combine_object_parts(bucket, upload_id, object_name, parts, request)
  upload_path   = File.join(@root, bucket.name)
  base_path     = File.join(upload_path, "#{upload_id}_#{object_name}")

  complete_file = ""
  chunk         = ""
  part_paths    = []

  parts.sort_by { |part| part[:number] }.each do |part|
    part_path    = "#{base_path}_part#{part[:number]}"
    content_path = File.join(part_path, SHUCK_METADATA_DIR, 'content')

    File.open(content_path, 'rb') { |f| chunk = f.read }
    etag = Digest::MD5.hexdigest(chunk)

    raise new Error "invalid file chunk" unless part[:etag] == etag
    complete_file << chunk
    part_paths    << part_path
  end

  object = do_store_object(bucket, object_name, complete_file, request)

  # clean up parts
  part_paths.each do |path|
    FileUtils.remove_dir(path)
  end

  object
end

#copy_object(src_bucket_name, src_name, dst_bucket_name, dst_name, request) ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 106

def copy_object(src_bucket_name, src_name, dst_bucket_name, dst_name, request)
  src_root = File.join(@root,src_bucket_name,src_name,SHUCK_METADATA_DIR)
  src_metadata_filename = File.join(src_root,"metadata")
  src_metadata = YAML.load(File.open(src_metadata_filename,'rb').read)
  src_content_filename = File.join(src_root,"content")

  dst_filename= File.join(@root,dst_bucket_name,dst_name)
  FileUtils.mkdir_p(dst_filename)

  metadata_dir = File.join(dst_filename,SHUCK_METADATA_DIR)
  FileUtils.mkdir_p(metadata_dir)

  content = File.join(metadata_dir,"content")
  metadata = File.join(metadata_dir,"metadata")

  if src_bucket_name != dst_bucket_name || src_name != dst_name
    File.open(content,'wb') do |f|
      File.open(src_content_filename,'rb') do |input|
        f << input.read
      end
    end

    File.open(metadata,'w') do |f|
      File.open(src_metadata_filename,'r') do |input|
        f << input.read
      end
    end
  end

  metadata_directive = request.header["x-amz-metadata-directive"].first
  if metadata_directive == "REPLACE"
    metadata_struct = create_metadata(content,request)
    File.open(metadata,'w') do |f|
      f << YAML::dump(metadata_struct)
    end
  end

  src_bucket = get_bucket(src_bucket_name) || create_bucket(src_bucket_name)
  dst_bucket = get_bucket(dst_bucket_name) || create_bucket(dst_bucket_name)

  obj = S3Object.new
  obj.name = dst_name
  obj.md5 = src_metadata[:md5]
  obj.content_type = src_metadata[:content_type]
  obj.size = src_metadata[:size]
  obj.modified_date = src_metadata[:modified_date]

  src_obj = src_bucket.find(src_name)
  dst_bucket.add(obj)
  return obj
end

#create_bucket(bucket) ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 61

def create_bucket(bucket)
  FileUtils.mkdir_p(File.join(@root,bucket))
  bucket_obj = Bucket.new(bucket,Time.now,[])
  if !@bucket_hash[bucket]
    @buckets << bucket_obj
    @bucket_hash[bucket] = bucket_obj
  end
  bucket_obj
end

#create_metadata(content, request) ⇒ Object

TODO: abstract getting meta data from request.



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# File 'lib/fakes3/file_store.rb', line 260

def create_metadata(content,request)
  metadata = {}
  metadata[:md5] = Digest::MD5.file(content).hexdigest
  metadata[:content_type] = request.header["content-type"].first
  metadata[:size] = File.size(content)
  metadata[:modified_date] = File.mtime(content).utc.iso8601(SUBSECOND_PRECISION)
  metadata[:amazon_metadata] = {}
  metadata[:custom_metadata] = {}

  # Add custom metadata from the request header
  request.header.each do |key, value|
    match = /^x-amz-([^-]+)-(.*)$/.match(key)
    next unless match
    if match[1].eql?('meta') && (match_key = match[2])
      metadata[:custom_metadata][match_key] = value.join(', ')
      next
    end
    metadata[:amazon_metadata][key.gsub(/^x-amz-/, '')] = value.join(', ')
  end
  return metadata
end

#delete_bucket(bucket_name) ⇒ Object

Raises:



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# File 'lib/fakes3/file_store.rb', line 71

def delete_bucket(bucket_name)
  bucket = get_bucket(bucket_name)
  raise NoSuchBucket if !bucket
  raise BucketNotEmpty if bucket.objects.count > 0
  FileUtils.rm_r(get_bucket_folder(bucket))
  @bucket_hash.delete(bucket_name)
end

#delete_object(bucket, object_name, request) ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 246

def delete_object(bucket,object_name,request)
  begin
    filename = File.join(@root,bucket.name,object_name)
    FileUtils.rm_rf(filename)
    object = bucket.find(object_name)
    bucket.remove(object)
  rescue
    puts $!
    $!.backtrace.each { |line| puts line }
    return nil
  end
end

#do_store_object(bucket, object_name, filedata, request) ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 182

def do_store_object(bucket, object_name, filedata, request)
  begin
    filename = File.join(@root,bucket.name,object_name)
    FileUtils.mkdir_p(filename)

    metadata_dir = File.join(filename,SHUCK_METADATA_DIR)
    FileUtils.mkdir_p(metadata_dir)

    content  = File.join(filename,SHUCK_METADATA_DIR,"content")
    metadata = File.join(filename,SHUCK_METADATA_DIR,"metadata")

    File.open(content,'wb') { |f| f << filedata }

    metadata_struct = create_metadata(content,request)
    File.open(metadata,'w') do |f|
      f << YAML::dump(metadata_struct)
    end

    obj = S3Object.new
    obj.name = object_name
    obj.md5 = metadata_struct[:md5]
    obj.content_type = metadata_struct[:content_type]
    obj.size = metadata_struct[:size]
    obj.modified_date = metadata_struct[:modified_date]

    bucket.add(obj)
    return obj
  rescue
    puts $!
    $!.backtrace.each { |line| puts line }
    return nil
  end
end

#get_bucket(bucket) ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 57

def get_bucket(bucket)
  @bucket_hash[bucket]
end

#get_bucket_folder(bucket) ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 53

def get_bucket_folder(bucket)
  File.join(@root,bucket.name)
end

#get_object(bucket, object_name, request) ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 79

def get_object(bucket,object_name, request)
  begin
    real_obj = S3Object.new
    obj_root = File.join(@root,bucket,object_name,SHUCK_METADATA_DIR)
    metadata = YAML.load(File.open(File.join(obj_root,"metadata"),'rb'))
    real_obj.name = object_name
    real_obj.md5 = metadata[:md5]
    real_obj.content_type = metadata.fetch(:content_type) { "application/octet-stream" }
    #real_obj.io = File.open(File.join(obj_root,"content"),'rb')
    real_obj.io = RateLimitableFile.open(File.join(obj_root,"content"),'rb')
    real_obj.size = metadata.fetch(:size) { 0 }
    real_obj.creation_date = File.ctime(obj_root).utc.iso8601(SUBSECOND_PRECISION)
    real_obj.modified_date = metadata.fetch(:modified_date) do
      File.mtime(File.join(obj_root,"content")).utc.iso8601(SUBSECOND_PRECISION)
    end
    real_obj.custom_metadata = metadata.fetch(:custom_metadata) { {} }
    return real_obj
  rescue
    puts $!
    $!.backtrace.each { |line| puts line }
    return nil
  end
end

#object_metadata(bucket, object) ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 103

def object_metadata(bucket,object)
end

#rate_limit=(rate_limit) ⇒ Object

Pass a rate limit in bytes per second



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# File 'lib/fakes3/file_store.rb', line 31

def rate_limit=(rate_limit)
  if rate_limit.is_a?(String)
    if rate_limit =~ /^(\d+)$/
      RateLimitableFile.rate_limit = rate_limit.to_i
    elsif rate_limit =~ /^(.*)K$/
      RateLimitableFile.rate_limit = $1.to_f * 1000
    elsif rate_limit =~ /^(.*)M$/
      RateLimitableFile.rate_limit = $1.to_f * 1000000
    elsif rate_limit =~ /^(.*)G$/
      RateLimitableFile.rate_limit = $1.to_f * 1000000000
    else
      raise "Invalid Rate Limit Format: Valid values include (1000,10K,1.1M)"
    end
  else
    RateLimitableFile.rate_limit = nil
  end
end

#store_object(bucket, object_name, request) ⇒ Object 



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# File 'lib/fakes3/file_store.rb', line 158

def store_object(bucket, object_name, request)
  filedata = ""

  # TODO put a tmpfile here first and mv it over at the end
  content_type = request.content_type || ""

  match = content_type.match(/^multipart\/form-data; boundary=(.+)/)
  boundary = match[1] if match
  if boundary
    boundary  = WEBrick::HTTPUtils::dequote(boundary)
    form_data = WEBrick::HTTPUtils::parse_form_data(request.body, boundary)

    if form_data['file'] == nil or form_data['file'] == ""
      raise WEBrick::HTTPStatus::BadRequest
    end

    filedata = form_data['file']
  else
    request.body { |chunk| filedata << chunk }
  end

  do_store_object(bucket, object_name, filedata, request)
end