コード例 #1
0
ファイル: list_all.go プロジェクト: okdave/gcloud
// Repeatedly call bucket.ListObjects until there is nothing further to list,
// returning all objects and collapsed runs encountered.
//
// May modify *req.
func ListAll(
	ctx context.Context,
	bucket gcs.Bucket,
	req *gcs.ListObjectsRequest) (
	objects []*gcs.Object,
	runs []string,
	err error) {
	for {
		// Grab one set of results.
		var listing *gcs.Listing
		if listing, err = bucket.ListObjects(ctx, req); err != nil {
			return
		}

		// Accumulate the results.
		objects = append(objects, listing.Objects...)
		runs = append(runs, listing.CollapsedRuns...)

		// Are we done?
		if listing.ContinuationToken == "" {
			break
		}

		req.ContinuationToken = listing.ContinuationToken
	}

	return
}
コード例 #2
0
ファイル: dir.go プロジェクト: mbookman/gcsfuse
// List the supplied object name prefix to find out whether it is non-empty.
func objectNamePrefixNonEmpty(
	ctx context.Context,
	bucket gcs.Bucket,
	prefix string) (nonEmpty bool, err error) {
	req := &gcs.ListObjectsRequest{
		Prefix:     prefix,
		MaxResults: 1,
	}

	listing, err := bucket.ListObjects(ctx, req)
	if err != nil {
		err = fmt.Errorf("ListObjects: %v", err)
		return
	}

	nonEmpty = len(listing.Objects) != 0
	return
}
コード例 #3
0
ファイル: list_prefix.go プロジェクト: okdave/gcloud
// List objects in the supplied bucket whose name starts with the given prefix.
// Write them into the supplied channel in an undefined order.
func ListPrefix(
	ctx context.Context,
	bucket gcs.Bucket,
	prefix string,
	objects chan<- *gcs.Object) (err error) {
	req := &gcs.ListObjectsRequest{
		Prefix: prefix,
	}

	// List until we run out.
	for {
		// Fetch the next batch.
		var listing *gcs.Listing
		listing, err = bucket.ListObjects(ctx, req)
		if err != nil {
			err = fmt.Errorf("ListObjects: %v", err)
			return
		}

		// Pass on each object.
		for _, o := range listing.Objects {
			select {
			case objects <- o:

				// Cancelled?
			case <-ctx.Done():
				err = ctx.Err()
				return
			}
		}

		// Are we done?
		if listing.ContinuationToken == "" {
			break
		}

		req.ContinuationToken = listing.ContinuationToken
	}

	return
}