google-api-ruby-client/lib/google/apis/core/upload.rb

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# Copyright 2015 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require 'google/apis/core/multipart'
require 'google/apis/core/http_command'
require 'google/apis/core/api_command'
require 'google/apis/errors'
require 'addressable/uri'
require 'mime-types'
module Google
module Apis
module Core
# Extension of Hurley's UploadIO to add length accessor
class UploadIO < Hurley::UploadIO
OCTET_STREAM_CONTENT_TYPE = 'application/octet-stream'
# Get the length of the stream
# @return [Fixnum]
def length
io.respond_to?(:length) ? io.length : File.size(local_path)
end
# Create a new instance given a file path
# @param [String, File] file_name
# Path to file
# @param [String] content_type
# Optional content type. If nil, will attempt to auto-detect
# @return [Google::Apis::Core::UploadIO]
def self.from_file(file_name, content_type: nil)
if content_type.nil?
type = MIME::Types.of(file_name)
content_type = type.first.content_type unless type.nil? || type.empty?
end
new(file_name, content_type || OCTET_STREAM_CONTENT_TYPE)
end
# Wraps an IO stream in UploadIO
# @param [#read] io
# IO to wrap
# @param [String] content_type
# Optional content type.
# @return [Google::Apis::Core::UploadIO]
def self.from_io(io, content_type: OCTET_STREAM_CONTENT_TYPE)
new(io, content_type)
end
end
# Base upload command. Not intended to be used directly
# @private
class BaseUploadCommand < ApiCommand
UPLOAD_PROTOCOL_HEADER = 'X-Goog-Upload-Protocol'
UPLOAD_CONTENT_TYPE_HEADER = 'X-Goog-Upload-Header-Content-Type'
UPLOAD_CONTENT_LENGTH = 'X-Goog-Upload-Header-Content-Length'
# File name or IO containing the content to upload
# @return [String, File, #read]
attr_accessor :upload_source
# Content type of the upload material
# @return [String]
attr_accessor :upload_content_type
# Content, as UploadIO
# @return [Google::Apis::Core::UploadIO]
attr_accessor :upload_io
# Ensure the content is readable and wrapped in an {{Google::Apis::Core::UploadIO}} instance.
#
# @return [void]
# @raise [Google::Apis::ClientError] if upload source is invalid
def prepare!
super
if streamable?(upload_source)
self.upload_io = UploadIO.from_io(upload_source, content_type: upload_content_type)
@close_io_on_finish = false
elsif upload_source.is_a?(String)
self.upload_io = UploadIO.from_file(upload_source, content_type: upload_content_type)
@close_io_on_finish = true
else
fail Google::Apis::ClientError, 'Invalid upload source'
end
end
# Close IO stream when command done. Only closes the stream if it was opened by the command.
def release!
upload_io.close if @close_io_on_finish
end
private
def streamable?(upload_source)
upload_source.is_a?(IO) || upload_source.is_a?(StringIO) || upload_source.is_a?(Tempfile)
end
end
# Implementation of the raw upload protocol
class RawUploadCommand < BaseUploadCommand
RAW_PROTOCOL = 'raw'
# Ensure the content is readable and wrapped in an {{Google::Apis::Core::UploadIO}} instance.
#
# @return [void]
# @raise [Google::Apis::ClientError] if upload source is invalid
def prepare!
super
self.body = upload_io
header[UPLOAD_PROTOCOL_HEADER] = RAW_PROTOCOL
header[UPLOAD_CONTENT_TYPE_HEADER] = upload_io.content_type
end
end
# Implementation of the multipart upload protocol
class MultipartUploadCommand < BaseUploadCommand
UPLOAD_BOUNDARY = 'RubyApiClientUpload'
MULTIPART_PROTOCOL = 'multipart'
MULTIPART_RELATED = 'multipart/related'
# Encode the multipart request
#
# @return [void]
# @raise [Google::Apis::ClientError] if upload source is invalid
def prepare!
super
@multipart = Multipart.new(boundary: UPLOAD_BOUNDARY, content_type: MULTIPART_RELATED)
@multipart.add_json(body)
@multipart.add_upload(upload_io)
self.body = @multipart.assemble
header[:content_type] = @multipart.content_type
header[UPLOAD_PROTOCOL_HEADER] = MULTIPART_PROTOCOL
end
end
# Implementation of the resumable upload protocol
class ResumableUploadCommand < BaseUploadCommand
UPLOAD_COMMAND_HEADER = 'X-Goog-Upload-Command'
UPLOAD_OFFSET_HEADER = 'X-Goog-Upload-Offset'
BYTES_RECEIVED_HEADER = 'X-Goog-Upload-Size-Received'
UPLOAD_URL_HEADER = 'X-Goog-Upload-URL'
UPLOAD_STATUS_HEADER = 'X-Goog-Upload-Status'
STATUS_ACTIVE = 'active'
STATUS_FINAL = 'final'
STATUS_CANCELLED = 'cancelled'
RESUMABLE = 'resumable'
START_COMMAND = 'start'
QUERY_COMMAND = 'query'
UPLOAD_COMMAND = 'upload, finalize'
# Reset upload to initial state.
#
# @return [void]
# @raise [Google::Apis::ClientError] if upload source is invalid
def prepare!
@state = :start
@upload_url = nil
@offset = 0
super
end
# Check the to see if the upload is complete or needs to be resumed.
#
# @param [Fixnum] status
# HTTP status code of response
# @param [Hurley::Header] header
# Response headers
# @param [String, #read] body
# Response body
# @return [Object]
# Response object
# @raise [Google::Apis::ServerError] An error occurred on the server and the request can be retried
# @raise [Google::Apis::ClientError] The request is invalid and should not be retried without modification
# @raise [Google::Apis::AuthorizationError] Authorization is required
def process_response(status, header, body)
@offset = Integer(header[BYTES_RECEIVED_HEADER]) if header.key?(BYTES_RECEIVED_HEADER)
@upload_url = header[UPLOAD_URL_HEADER] if header.key?(UPLOAD_URL_HEADER)
upload_status = header[UPLOAD_STATUS_HEADER]
logger.debug { sprintf('Upload status %s', upload_status) }
if upload_status == STATUS_ACTIVE
@state = :active
elsif upload_status == STATUS_FINAL
@state = :final
elsif upload_status == STATUS_CANCELLED
@state = :cancelled
fail Google::Apis::ClientError, body
end
super(status, header, body)
end
# Send the start command to initiate the upload
#
# @param [Hurley::Client] client
# HTTP client
# @return [Hurley::Response]
# @raise [Google::Apis::ServerError] Unable to send the request
def send_start_command(client)
logger.debug { sprintf('Sending upload start command to %s', url) }
client.send(method, url, body) do |req|
apply_request_options(req)
req.header[UPLOAD_PROTOCOL_HEADER] = RESUMABLE
req.header[UPLOAD_COMMAND_HEADER] = START_COMMAND
req.header[UPLOAD_CONTENT_LENGTH] = upload_io.length.to_s
req.header[UPLOAD_CONTENT_TYPE_HEADER] = upload_io.content_type
end
rescue => e
raise Google::Apis::ServerError, e.message
end
# Query for the status of an incomplete upload
#
# @param [Hurley::Client] client
# HTTP client
# @return [Hurley::Response]
# @raise [Google::Apis::ServerError] Unable to send the request
def send_query_command(client)
logger.debug { sprintf('Sending upload query command to %s', @upload_url) }
client.post(@upload_url, nil) do |req|
apply_request_options(req)
req.header[UPLOAD_COMMAND_HEADER] = QUERY_COMMAND
end
end
# Send the actual content
#
# @param [Hurley::Client] client
# HTTP client
# @return [Hurley::Response]
# @raise [Google::Apis::ServerError] Unable to send the request
def send_upload_command(client)
logger.debug { sprintf('Sending upload command to %s', @upload_url) }
content = upload_io
content.pos = @offset
client.post(@upload_url, content) do |req|
apply_request_options(req)
req.header[UPLOAD_COMMAND_HEADER] = UPLOAD_COMMAND
req.header[UPLOAD_OFFSET_HEADER] = @offset.to_s
end
end
# Execute the upload request once. This will typically perform two HTTP requests -- one to initiate or query
# for the status of the upload, the second to send the (remaining) content.
#
# @private
# @param [Hurley::Client] client
# HTTP client
# @yield [result, err] Result or error if block supplied
# @return [Object]
# @raise [Google::Apis::ServerError] An error occurred on the server and the request can be retried
# @raise [Google::Apis::ClientError] The request is invalid and should not be retried without modification
# @raise [Google::Apis::AuthorizationError] Authorization is required
def execute_once(client, &block)
case @state
when :start
response = send_start_command(client)
result = process_response(response.status_code, response.header, response.body)
when :active
response = send_query_command(client)
result = process_response(response.status_code, response.header, response.body)
when :cancelled, :final
error(@last_error, rethrow: true, &block)
end
if @state == :active
response = send_upload_command(client)
result = process_response(response.status_code, response.header, response.body)
end
success(result, &block) if @state == :final
rescue => e
# Some APIs like Youtube generate non-retriable 401 errors and mark
# the upload as finalized. Save the error just in case we get
# retried.
@last_error = e
error(e, rethrow: true, &block)
end
end
end
end
end