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Close file on invalid range (Addition to #15166) (#15268)

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* Close file on invalid range.

* Close on seek error

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Moved 'Seek' into server.

* io.ReadSeekCloser is only available in Go 1.16

Co-authored-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
KN4CK3R 2021-04-06 15:22:34 +02:00 committed by GitHub
parent 1ba8b95eb4
commit 5f18404045
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 21 additions and 29 deletions
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23
modules/lfs/content_store.go
View file

@ -44,32 +44,13 @@ type ContentStore struct {
} }
// Get takes a Meta object and retrieves the content from the store, returning // Get takes a Meta object and retrieves the content from the store, returning
// it as an io.Reader. If fromByte > 0, the reader starts from that byte // it as an io.ReadSeekCloser.
func (s *ContentStore) Get(meta *models.LFSMetaObject, fromByte int64) (io.ReadCloser, error) { func (s *ContentStore) Get(meta *models.LFSMetaObject) (storage.Object, error) {
f, err := s.Open(meta.RelativePath()) f, err := s.Open(meta.RelativePath())
if err != nil { if err != nil {
log.Error("Whilst trying to read LFS OID[%s]: Unable to open Error: %v", meta.Oid, err) log.Error("Whilst trying to read LFS OID[%s]: Unable to open Error: %v", meta.Oid, err)
return nil, err return nil, err
} }
if fromByte > 0 {
if fromByte >= meta.Size {
err = f.Close()
if err != nil {
log.Error("Whilst trying to read LFS OID[%s]: Unable to close Error: %v", meta.Oid, err)
}
return nil, ErrRangeNotSatisfiable{
FromByte: fromByte,
}
}
_, err = f.Seek(fromByte, io.SeekStart)
if err != nil {
log.Error("Whilst trying to read LFS OID[%s]: Unable to seek to %d Error: %v", meta.Oid, fromByte, err)
errClose := f.Close()
if errClose != nil {
log.Error("Whilst trying to read LFS OID[%s]: Unable to close Error: %v", meta.Oid, errClose)
}
}
}
return f, err return f, err
} }

2
modules/lfs/pointers.go
View file

@ -67,5 +67,5 @@ func IsPointerFile(buf *[]byte) *models.LFSMetaObject {
// ReadMetaObject will read a models.LFSMetaObject and return a reader // ReadMetaObject will read a models.LFSMetaObject and return a reader
func ReadMetaObject(meta *models.LFSMetaObject) (io.ReadCloser, error) { func ReadMetaObject(meta *models.LFSMetaObject) (io.ReadCloser, error) {
contentStore := &ContentStore{ObjectStorage: storage.LFS} contentStore := &ContentStore{ObjectStorage: storage.LFS}
return contentStore.Get(meta, 0) return contentStore.Get(meta)
} }

25
modules/lfs/server.go
View file

@ -175,6 +175,11 @@ func getContentHandler(ctx *context.Context) {
statusCode = 206 statusCode = 206
fromByte, _ = strconv.ParseInt(match[1], 10, 32) fromByte, _ = strconv.ParseInt(match[1], 10, 32)
if fromByte >= meta.Size {
writeStatus(ctx, http.StatusRequestedRangeNotSatisfiable)
return
}
if match[2] != "" { if match[2] != "" {
_toByte, _ := strconv.ParseInt(match[2], 10, 32) _toByte, _ := strconv.ParseInt(match[2], 10, 32)
if _toByte >= fromByte && _toByte < toByte { if _toByte >= fromByte && _toByte < toByte {
@ -188,18 +193,24 @@ func getContentHandler(ctx *context.Context) {
} }
contentStore := &ContentStore{ObjectStorage: storage.LFS} contentStore := &ContentStore{ObjectStorage: storage.LFS}
content, err := contentStore.Get(meta, fromByte) content, err := contentStore.Get(meta)
if err != nil { if err != nil {
if IsErrRangeNotSatisfiable(err) { // Errors are logged in contentStore.Get
writeStatus(ctx, http.StatusRequestedRangeNotSatisfiable) writeStatus(ctx, http.StatusNotFound)
} else {
// Errors are logged in contentStore.Get
writeStatus(ctx, 404)
}
return return
} }
defer content.Close() defer content.Close()
if fromByte > 0 {
_, err = content.Seek(fromByte, io.SeekStart)
if err != nil {
log.Error("Whilst trying to read LFS OID[%s]: Unable to seek to %d Error: %v", meta.Oid, fromByte, err)
writeStatus(ctx, http.StatusInternalServerError)
return
}
}
contentLength := toByte + 1 - fromByte contentLength := toByte + 1 - fromByte
ctx.Resp.Header().Set("Content-Length", strconv.FormatInt(contentLength, 10)) ctx.Resp.Header().Set("Content-Length", strconv.FormatInt(contentLength, 10))
ctx.Resp.Header().Set("Content-Type", "application/octet-stream") ctx.Resp.Header().Set("Content-Type", "application/octet-stream")