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