Imports camlistore.org/pkg/blobref camlistore.org/pkg/blobserver camlistore.org/pkg/rollsum camlistore.org/pkg/singleflight camlistore.org/pkg/types camlistore.org/third_party/github.com/camlistore/goexif/exif Standard library imports bufio bytes crypto/rand crypto/sha1 encoding/base64 encoding/json errors fmt hash io io/ioutil log os os/user path/filepath reflect strconv strings sync syscall time unicode/utf8