[bugfix] return 400 Bad Request on more cases of malformed AS data (#2399)

internal/log/format.go

@@ -0,0 +1,29 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package log
+
+import "codeberg.org/gruf/go-kv/format"
+
+// VarDump returns a serialized, useful log / error output of given variable.
+func VarDump(a any) string {
+	buf := getBuf()
+	format.Appendf(buf, "{:v}", a)
+	s := string(buf.B)
+	putBuf(buf)
+	return s
+}