fs := client.SiteFileSystem(kc)
fs.ForwardSlashNameSubstitution(h.Config.cluster.Collections.ForwardSlashNameSubstitution)
+ objectNameGiven := strings.Count(strings.TrimSuffix(r.URL.Path, "/"), "/") > 1
+
switch {
- case r.Method == "GET" && strings.Count(strings.TrimSuffix(r.URL.Path, "/"), "/") == 1:
+ case r.Method == http.MethodGet && !objectNameGiven:
// Path is "/{uuid}" or "/{uuid}/", has no object name
- h.s3list(w, r, fs)
+ if _, ok := r.URL.Query()["versioning"]; ok {
+ // GetBucketVersioning
+ w.Header().Set("Content-Type", "application/xml")
+ io.WriteString(w, xml.Header)
+ fmt.Fprintln(w, `<VersioningConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"/>`)
+ } else {
+ // ListObjects
+ h.s3list(w, r, fs)
+ }
return true
- case r.Method == "GET":
+ case r.Method == http.MethodGet || r.Method == http.MethodHead:
fspath := "/by_id" + r.URL.Path
fi, err := fs.Stat(fspath)
+ if r.Method == "HEAD" && !objectNameGiven {
+ // HeadBucket
+ if err == nil && fi.IsDir() {
+ w.WriteHeader(http.StatusOK)
+ } else if os.IsNotExist(err) {
+ w.WriteHeader(http.StatusNotFound)
+ } else {
+ http.Error(w, err.Error(), http.StatusBadGateway)
+ }
+ return true
+ }
+ if err == nil && fi.IsDir() && objectNameGiven && strings.HasSuffix(fspath, "/") && h.Config.cluster.Collections.S3FolderObjects {
+ w.Header().Set("Content-Type", "application/x-directory")
+ w.WriteHeader(http.StatusOK)
+ return true
+ }
if os.IsNotExist(err) ||
(err != nil && err.Error() == "not a directory") ||
(fi != nil && fi.IsDir()) {
r.URL.Path = fspath
http.FileServer(fs).ServeHTTP(w, &r)
return true
- case r.Method == "PUT":
- if strings.HasSuffix(r.URL.Path, "/") {
- http.Error(w, "invalid object name (trailing '/' char)", http.StatusBadRequest)
+ case r.Method == http.MethodPut:
+ if !objectNameGiven {
+ http.Error(w, "missing object name in PUT request", http.StatusBadRequest)
return true
}
fspath := "by_id" + r.URL.Path
- _, err = fs.Stat(fspath)
+ var objectIsDir bool
+ if strings.HasSuffix(fspath, "/") {
+ if !h.Config.cluster.Collections.S3FolderObjects {
+ http.Error(w, "invalid object name: trailing slash", http.StatusBadRequest)
+ return true
+ }
+ n, err := r.Body.Read(make([]byte, 1))
+ if err != nil && err != io.EOF {
+ http.Error(w, fmt.Sprintf("error reading request body: %s", err), http.StatusInternalServerError)
+ return true
+ } else if n > 0 {
+ http.Error(w, "cannot create object with trailing '/' char unless content is empty", http.StatusBadRequest)
+ return true
+ } else if strings.SplitN(r.Header.Get("Content-Type"), ";", 2)[0] != "application/x-directory" {
+ http.Error(w, "cannot create object with trailing '/' char unless Content-Type is 'application/x-directory'", http.StatusBadRequest)
+ return true
+ }
+ // Given PUT "foo/bar/", we'll use "foo/bar/."
+ // in the "ensure parents exist" block below,
+ // and then we'll be done.
+ fspath += "."
+ objectIsDir = true
+ }
+ fi, err := fs.Stat(fspath)
if err != nil && err.Error() == "not a directory" {
// requested foo/bar, but foo is a file
http.Error(w, "object name conflicts with existing object", http.StatusBadRequest)
return true
}
- f, err := fs.OpenFile(fspath, os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0644)
- if os.IsNotExist(err) {
- // create missing intermediate directories, then try again
- for i, c := range fspath {
- if i > 0 && c == '/' {
- dir := fspath[:i]
- if strings.HasSuffix(dir, "/") {
- err = errors.New("invalid object name (consecutive '/' chars)")
- http.Error(w, err.Error(), http.StatusBadRequest)
- return true
- }
- err := fs.Mkdir(dir, 0755)
- if err != nil && err != os.ErrExist {
- err = fmt.Errorf("mkdir %q failed: %w", dir, err)
- http.Error(w, err.Error(), http.StatusInternalServerError)
- return true
- }
+ if strings.HasSuffix(r.URL.Path, "/") && err == nil && !fi.IsDir() {
+ // requested foo/bar/, but foo/bar is a file
+ http.Error(w, "object name conflicts with existing object", http.StatusBadRequest)
+ return true
+ }
+ // create missing parent/intermediate directories, if any
+ for i, c := range fspath {
+ if i > 0 && c == '/' {
+ dir := fspath[:i]
+ if strings.HasSuffix(dir, "/") {
+ err = errors.New("invalid object name (consecutive '/' chars)")
+ http.Error(w, err.Error(), http.StatusBadRequest)
+ return true
+ }
+ err = fs.Mkdir(dir, 0755)
+ if err == arvados.ErrInvalidArgument {
+ // Cannot create a directory
+ // here.
+ err = fmt.Errorf("mkdir %q failed: %w", dir, err)
+ http.Error(w, err.Error(), http.StatusBadRequest)
+ return true
+ } else if err != nil && !os.IsExist(err) {
+ err = fmt.Errorf("mkdir %q failed: %w", dir, err)
+ http.Error(w, err.Error(), http.StatusInternalServerError)
+ return true
}
}
- f, err = fs.OpenFile(fspath, os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0644)
}
+ if !objectIsDir {
+ f, err := fs.OpenFile(fspath, os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0644)
+ if os.IsNotExist(err) {
+ f, err = fs.OpenFile(fspath, os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0644)
+ }
+ if err != nil {
+ err = fmt.Errorf("open %q failed: %w", r.URL.Path, err)
+ http.Error(w, err.Error(), http.StatusBadRequest)
+ return true
+ }
+ defer f.Close()
+ _, err = io.Copy(f, r.Body)
+ if err != nil {
+ err = fmt.Errorf("write to %q failed: %w", r.URL.Path, err)
+ http.Error(w, err.Error(), http.StatusBadGateway)
+ return true
+ }
+ err = f.Close()
+ if err != nil {
+ err = fmt.Errorf("write to %q failed: close: %w", r.URL.Path, err)
+ http.Error(w, err.Error(), http.StatusBadGateway)
+ return true
+ }
+ }
+ err = fs.Sync()
if err != nil {
- err = fmt.Errorf("open %q failed: %w", r.URL.Path, err)
- http.Error(w, err.Error(), http.StatusBadRequest)
+ err = fmt.Errorf("sync failed: %w", err)
+ http.Error(w, err.Error(), http.StatusInternalServerError)
return true
}
- defer f.Close()
- _, err = io.Copy(f, r.Body)
- if err != nil {
- err = fmt.Errorf("write to %q failed: %w", r.URL.Path, err)
- http.Error(w, err.Error(), http.StatusBadGateway)
+ w.WriteHeader(http.StatusOK)
+ return true
+ case r.Method == http.MethodDelete:
+ if !objectNameGiven || r.URL.Path == "/" {
+ http.Error(w, "missing object name in DELETE request", http.StatusBadRequest)
+ return true
+ }
+ fspath := "by_id" + r.URL.Path
+ if strings.HasSuffix(fspath, "/") {
+ fspath = strings.TrimSuffix(fspath, "/")
+ fi, err := fs.Stat(fspath)
+ if os.IsNotExist(err) {
+ w.WriteHeader(http.StatusNoContent)
+ return true
+ } else if err != nil {
+ http.Error(w, err.Error(), http.StatusInternalServerError)
+ return true
+ } else if !fi.IsDir() {
+ // if "foo" exists and is a file, then
+ // "foo/" doesn't exist, so we say
+ // delete was successful.
+ w.WriteHeader(http.StatusNoContent)
+ return true
+ }
+ } else if fi, err := fs.Stat(fspath); err == nil && fi.IsDir() {
+ // if "foo" is a dir, it is visible via S3
+ // only as "foo/", not "foo" -- so we leave
+ // the dir alone and return 204 to indicate
+ // that "foo" does not exist.
+ w.WriteHeader(http.StatusNoContent)
+ return true
+ }
+ err = fs.Remove(fspath)
+ if os.IsNotExist(err) {
+ w.WriteHeader(http.StatusNoContent)
return true
}
- err = f.Close()
if err != nil {
- err = fmt.Errorf("write to %q failed: close: %w", r.URL.Path, err)
- http.Error(w, err.Error(), http.StatusBadGateway)
+ err = fmt.Errorf("rm failed: %w", err)
+ http.Error(w, err.Error(), http.StatusBadRequest)
return true
}
err = fs.Sync()
http.Error(w, err.Error(), http.StatusInternalServerError)
return true
}
- w.WriteHeader(http.StatusOK)
+ w.WriteHeader(http.StatusNoContent)
return true
default:
http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
}
}
-func walkFS(fs arvados.CustomFileSystem, path string, ignoreNotFound bool, fn func(path string, fi os.FileInfo) error) error {
+// Call fn on the given path (directory) and its contents, in
+// lexicographic order.
+//
+// If isRoot==true and path is not a directory, return nil.
+//
+// If fn returns filepath.SkipDir when called on a directory, don't
+// descend into that directory.
+func walkFS(fs arvados.CustomFileSystem, path string, isRoot bool, fn func(path string, fi os.FileInfo) error) error {
+ if isRoot {
+ fi, err := fs.Stat(path)
+ if os.IsNotExist(err) || (err == nil && !fi.IsDir()) {
+ return nil
+ } else if err != nil {
+ return err
+ }
+ err = fn(path, fi)
+ if err == filepath.SkipDir {
+ return nil
+ } else if err != nil {
+ return err
+ }
+ }
f, err := fs.Open(path)
- if os.IsNotExist(err) && ignoreNotFound {
+ if os.IsNotExist(err) && isRoot {
return nil
} else if err != nil {
return fmt.Errorf("open %q: %w", path, err)
walkpath = ""
}
- resp := s3.ListResp{
- Name: strings.SplitN(r.URL.Path[1:], "/", 2)[0],
- Prefix: params.prefix,
- Delimiter: params.delimiter,
- Marker: params.marker,
- MaxKeys: params.maxKeys,
+ type commonPrefix struct {
+ Prefix string
+ }
+ type listResp struct {
+ XMLName string `xml:"http://s3.amazonaws.com/doc/2006-03-01/ ListBucketResult"`
+ s3.ListResp
+ // s3.ListResp marshals an empty tag when
+ // CommonPrefixes is nil, which confuses some clients.
+ // Fix by using this nested struct instead.
+ CommonPrefixes []commonPrefix
+ }
+ resp := listResp{
+ ListResp: s3.ListResp{
+ Name: strings.SplitN(r.URL.Path[1:], "/", 2)[0],
+ Prefix: params.prefix,
+ Delimiter: params.delimiter,
+ Marker: params.marker,
+ MaxKeys: params.maxKeys,
+ },
}
commonPrefixes := map[string]bool{}
err := walkFS(fs, strings.TrimSuffix(bucketdir+"/"+walkpath, "/"), true, func(path string, fi os.FileInfo) error {
+ if path == bucketdir {
+ return nil
+ }
path = path[len(bucketdir)+1:]
+ filesize := fi.Size()
+ if fi.IsDir() {
+ path += "/"
+ filesize = 0
+ }
if len(path) <= len(params.prefix) {
if path > params.prefix[:len(path)] {
// with prefix "foobar", walking "fooz" means we're done
// with prefix "foobar", walking "foobag" is pointless
return filepath.SkipDir
}
- if fi.IsDir() && !strings.HasPrefix(params.prefix+"/", path+"/") {
+ if fi.IsDir() && !strings.HasPrefix(params.prefix+"/", path) {
// with prefix "foo/bar", walking "fo"
// is pointless (but walking "foo" or
// "foo/bar" is necessary)
if path < params.marker || path < params.prefix {
return nil
}
- if fi.IsDir() {
+ if fi.IsDir() && !h.Config.cluster.Collections.S3FolderObjects {
+ // Note we don't add anything to
+ // commonPrefixes here even if delimiter is
+ // "/". We descend into the directory, and
+ // return a commonPrefix only if we end up
+ // finding a regular file inside it.
return nil
}
if params.delimiter != "" {
// with prefix "foobar" and delimiter
// "z", when we hit "foobar/baz", we
// add "/baz" to commonPrefixes and
- // stop descending (note that even if
- // delimiter is "/" we don't add
- // anything to commonPrefixes when
- // seeing a dir: we wait until we see
- // a file, so we don't incorrectly
- // return results for empty dirs)
+ // stop descending.
commonPrefixes[path[:len(params.prefix)+idx+1]] = true
return filepath.SkipDir
}
return errDone
}
resp.Contents = append(resp.Contents, s3.Key{
- Key: path,
+ Key: path,
+ LastModified: fi.ModTime().UTC().Format("2006-01-02T15:04:05.999") + "Z",
+ Size: filesize,
})
return nil
})
return
}
if params.delimiter != "" {
+ resp.CommonPrefixes = make([]commonPrefix, 0, len(commonPrefixes))
for prefix := range commonPrefixes {
- resp.CommonPrefixes = append(resp.CommonPrefixes, prefix)
- sort.Strings(resp.CommonPrefixes)
+ resp.CommonPrefixes = append(resp.CommonPrefixes, commonPrefix{prefix})
}
+ sort.Slice(resp.CommonPrefixes, func(i, j int) bool { return resp.CommonPrefixes[i].Prefix < resp.CommonPrefixes[j].Prefix })
}
+ w.Header().Set("Content-Type", "application/xml")
+ io.WriteString(w, xml.Header)
if err := xml.NewEncoder(w).Encode(resp); err != nil {
ctxlog.FromContext(r.Context()).WithError(err).Error("error writing xml response")
}
projects / arvados.git / blobdiff