Class: PorkyLib::FileService

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/porky_lib/file_service.rb

Defined Under Namespace

Classes: FileServiceError, FileSizeTooLargeError

Instance Method Summary collapse

Instance Method Details

#overwrite_file(file, file_key, bucket_name, key_id, options = {}) ⇒ Object

Raises:



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# File 'lib/porky_lib/file_service.rb', line 46

def overwrite_file(file, file_key, bucket_name, key_id, options = {})
  raise FileServiceError, 'Invalid input. One or more input values is nil' if input_invalid?(file, bucket_name, key_id)
  raise FileServiceError, 'Invalid input. file_key cannot be nil if overwriting an existing file' if file_key.nil?
  raise FileSizeTooLargeError, "File size is larger than maximum allowed size of #{max_file_size}" if file_size_invalid?(file)

  data = file_data(file)
  tempfile = encrypt_file_contents(data, key_id, file_key, options)

  begin
    perform_upload(bucket_name, file_key, tempfile, options)
  rescue Aws::Errors::ServiceError => e
    raise FileServiceError, "Attempt to upload a file to S3 failed.\n#{e.message}"
  end

  # Remove tempfile from disk
  tempfile.unlink
end

#read(bucket_name, file_key, options = {}) ⇒ Object 



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# File 'lib/porky_lib/file_service.rb', line 12

def read(bucket_name, file_key, options = {})
  tempfile = Tempfile.new

  begin
    object = s3.bucket(bucket_name).object(file_key)
    raise FileSizeTooLargeError, "File size is larger than maximum allowed size of #{max_file_size}" if object.content_length > max_size

    object.download_file(tempfile.path, options)
  rescue Aws::Errors::ServiceError => e
    raise FileServiceError, "Attempt to download a file from S3 failed.\n#{e.message}"
  end

  decrypt_file_contents(tempfile)
end

#write(file, bucket_name, key_id, options = {}) ⇒ Object

Raises:



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# File 'lib/porky_lib/file_service.rb', line 27

def write(file, bucket_name, key_id, options = {})
  raise FileServiceError, 'Invalid input. One or more input values is nil' if input_invalid?(file, bucket_name, key_id)
  raise FileSizeTooLargeError, "File size is larger than maximum allowed size of #{max_file_size}" if file_size_invalid?(file)

  data = file_data(file)
  file_key = options.key?(:directory) ? "#{options[:directory]}/#{SecureRandom.uuid}" : SecureRandom.uuid
  tempfile = encrypt_file_contents(data, key_id, file_key, options)

  begin
    perform_upload(bucket_name, file_key, tempfile, options)
  rescue Aws::Errors::ServiceError => e
    raise FileServiceError, "Attempt to upload a file to S3 failed.\n#{e.message}"
  end

  # Remove tempfile from disk
  tempfile.unlink
  file_key
end