fix(s3): accept empty put without content length (#6849)

Co-authored-by: heihutu <heihutu@gmail.com>

rustfs/src/app/object/extract.rs

@@ -656,7 +656,7 @@ impl DefaultObjectUsecase {
                 req_info.object = Some(fpath.clone());
                 req_info.version_id = None;
             }
-            let entry_size = f.header().size().unwrap_or_default();
+            let entry_size = f.effective_size();
             validate_put_object_extract_entry_size(&fpath, entry_size, extract_limits)?;
             total_unpacked_size = total_unpacked_size
                 .checked_add(entry_size)

rustfs/src/server/http.rs

@@ -2273,6 +2273,7 @@ mod tests {
         let s3_config = rustfs_s3_config();
 
         assert!(s3_config.normalize_forward_slash_path);
+        assert!(s3_config.normalize_content_length);
         assert!(s3_config.enable_sig_v2);
         assert!(s3_config.sig_v4_allowed_services.iter().any(|service| service == "s3"));
         assert!(s3_config.sig_v4_allowed_services.iter().any(|service| service == "sts"));