filer_web: support moving entry

weed/server/filer_server_handlers_write.go

@@ -3,6 +3,7 @@ package weed_server
 import (
 	"context"
 	"errors"
+	"fmt"
 	"net/http"
 	"os"
 	"strings"
@@ -78,11 +79,78 @@ func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request, conte
 		return
 	}
 
-	fs.autoChunk(ctx, w, r, contentLength, so)
+	if query.Has("from") {
+		fs.move(ctx, w, r, so)
+	} else {
+		fs.autoChunk(ctx, w, r, contentLength, so)
+	}
+
 	util.CloseRequest(r)
 
 }
 
+func (fs *FilerServer) move(ctx context.Context, w http.ResponseWriter, r *http.Request, so *operation.StorageOption) {
+	src := r.URL.Query().Get("from")
+	dst := r.URL.Path
+
+	glog.V(2).Infof("FilerServer.move %v to %v", src, dst)
+
+	var err error
+	if src, err = clearName(src); err != nil {
+		writeJsonError(w, r, http.StatusBadRequest, err)
+		return
+	}
+	if dst, err = clearName(dst); err != nil {
+		writeJsonError(w, r, http.StatusBadRequest, err)
+		return
+	}
+	src = strings.TrimRight(src, "/")
+	if src == "" {
+		err = fmt.Errorf("invalid source '/'")
+		writeJsonError(w, r, http.StatusBadRequest, err)
+		return
+	}
+
+	srcPath := util.FullPath(src)
+	dstPath := util.FullPath(dst)
+	srcEntry, err := fs.filer.FindEntry(ctx, srcPath)
+	if err != nil {
+		err = fmt.Errorf("failed to get src entry '%s', err: %s", src, err)
+		writeJsonError(w, r, http.StatusBadRequest, err)
+		return
+	}
+
+	oldDir, oldName := srcPath.DirAndName()
+	newDir, newName := dstPath.DirAndName()
+	newName = util.Nvl(newName, oldName)
+
+	dstEntry, err := fs.filer.FindEntry(ctx, util.FullPath(strings.TrimRight(dst, "/")))
+	if err != nil && err != filer_pb.ErrNotFound {
+		err = fmt.Errorf("failed to get dst entry '%s', err: %s", dst, err)
+		writeJsonError(w, r, http.StatusInternalServerError, err)
+		return
+	}
+	if err == nil && !dstEntry.IsDirectory() && srcEntry.IsDirectory() {
+		err = fmt.Errorf("move: cannot overwrite non-directory '%s' with directory '%s'", dst, src)
+		writeJsonError(w, r, http.StatusBadRequest, err)
+		return
+	}
+
+	_, err = fs.AtomicRenameEntry(ctx, &filer_pb.AtomicRenameEntryRequest{
+		OldDirectory: oldDir,
+		OldName:      oldName,
+		NewDirectory: newDir,
+		NewName:      newName,
+	})
+	if err != nil {
+		err = fmt.Errorf("failed to move entry from '%s' to '%s', err: %s", src, dst, err)
+		writeJsonError(w, r, http.StatusBadRequest, err)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}
+
 // curl -X DELETE http://localhost:8888/path/to
 // curl -X DELETE http://localhost:8888/path/to?recursive=true
 // curl -X DELETE http://localhost:8888/path/to?recursive=true&ignoreRecursiveError=true