func()

in oss/downloader.go [199:236]

• 31 lines of code
• 9 McCabe index (conditional complexity)

func (d *Downloader) newDelegate(ctx context.Context, request *GetObjectRequest, optFns ...func(*DownloaderOptions)) (*downloaderDelegate, error) {
	if request == nil {
		return nil, NewErrParamNull("request")
	}

	if !isValidBucketName(request.Bucket) {
		return nil, NewErrParamInvalid("request.Bucket")
	}

	if !isValidObjectName(request.Key) {
		return nil, NewErrParamInvalid("request.Key")
	}

	if request.Range != nil && !isValidRange(request.Range) {
		return nil, NewErrParamInvalid("request.Range")
	}

	delegate := downloaderDelegate{
		base:    d,
		options: d.options,
		client:  d.client,
		context: ctx,
		request: request,
	}

	for _, opt := range optFns {
		opt(&delegate.options)
	}

	if delegate.options.ParallelNum <= 0 {
		delegate.options.ParallelNum = DefaultDownloadParallel
	}
	if delegate.options.PartSize <= 0 {
		delegate.options.PartSize = DefaultDownloadPartSize
	}

	return &delegate, nil
}