XmlNodes are now always closed

Remove the close() method and closed attribute. Remove all the calls to
close().  (Save one bool per XmlNode, yay, and save a few ifs and some
useless function calls. At best it should be unnoticeably faster and lighter
and save a few keystrokes in the future)

9 files changed, 10 insertions, 145 deletions

diff --git a/louloulibs/xmpp/adhoc_command.cpp b/louloulibs/xmpp/adhoc_command.cpp
index 24145f5..c17f1d9 100644
--- a/louloulibs/xmpp/adhoc_command.cpp
+++ b/louloulibs/xmpp/adhoc_command.cpp
@@ -25,7 +25,6 @@ void PingStep1(XmppComponent*, AdhocSession&, XmlNode& command_node)
   XmlNode note("note");
   note["type"] = "info";
   note.set_inner("Pong");
-  note.close();
   command_node.add_child(std::move(note));
 }
 
@@ -35,22 +34,17 @@ void HelloStep1(XmppComponent*, AdhocSession&, XmlNode& command_node)
   x["type"] = "form";
   XmlNode title("title");
   title.set_inner("Configure your name.");
-  title.close();
   x.add_child(std::move(title));
   XmlNode instructions("instructions");
   instructions.set_inner("Please provide your name.");
-  instructions.close();
   x.add_child(std::move(instructions));
   XmlNode name_field("field");
   name_field["var"] = "name";
   name_field["type"] = "text-single";
   name_field["label"] = "Your name";
   XmlNode required("required");
-  required.close();
   name_field.add_child(std::move(required));
-  name_field.close();
   x.add_child(std::move(name_field));
-  x.close();
   command_node.add_child(std::move(x));
 }
 
@@ -75,7 +69,6 @@ void HelloStep2(XmppComponent*, AdhocSession& session, XmlNode& command_node)
               XmlNode note("note");
               note["type"] = "info";
               note.set_inner("Hello "s + value->get_inner() + "!"s);
-              note.close();
               command_node.delete_all_children();
               command_node.add_child(std::move(note));
               return;
@@ -86,9 +79,7 @@ void HelloStep2(XmppComponent*, AdhocSession& session, XmlNode& command_node)
   XmlNode error(ADHOC_NS":error");
   error["type"] = "modify";
   XmlNode condition(STANZA_NS":bad-request");
-  condition.close();
   error.add_child(std::move(condition));
-  error.close();
   command_node.add_child(std::move(error));
   session.terminate();
 }
@@ -100,6 +91,5 @@ void Reload(XmppComponent*, AdhocSession&, XmlNode& command_node)
   XmlNode note("note");
   note["type"] = "info";
   note.set_inner("Configuration reloaded.");
-  note.close();
   command_node.add_child(std::move(note));
 }
diff --git a/louloulibs/xmpp/adhoc_commands_handler.cpp b/louloulibs/xmpp/adhoc_commands_handler.cpp
index 46c8a32..458a22c 100644
--- a/louloulibs/xmpp/adhoc_commands_handler.cpp
+++ b/louloulibs/xmpp/adhoc_commands_handler.cpp
@@ -36,9 +36,7 @@ XmlNode AdhocCommandsHandler::handle_request(const std::string& executor_jid, Xm
       XmlNode error(ADHOC_NS":error");
       error["type"] = "cancel";
       XmlNode condition(STANZA_NS":item-not-found");
-      condition.close();
       error.add_child(std::move(condition));
-      error.close();
       command_node.add_child(std::move(error));
     }
   else if (command_it->second.is_admin_only() &&
@@ -47,9 +45,7 @@ XmlNode AdhocCommandsHandler::handle_request(const std::string& executor_jid, Xm
       XmlNode error(ADHOC_NS":error");
       error["type"] = "cancel";
       XmlNode condition(STANZA_NS":forbidden");
-      condition.close();
       error.add_child(std::move(condition));
-      error.close();
       command_node.add_child(std::move(error));
     }
   else
@@ -72,9 +68,7 @@ XmlNode AdhocCommandsHandler::handle_request(const std::string& executor_jid, Xm
           XmlNode error(ADHOC_NS":error");
           error["type"] = "modify";
           XmlNode condition(STANZA_NS":bad-request");
-          condition.close();
           error.add_child(std::move(condition));
-          error.close();
           command_node.add_child(std::move(error));
         }
       else if (action == "execute" || action == "next" || action == "complete")
@@ -95,9 +89,7 @@ XmlNode AdhocCommandsHandler::handle_request(const std::string& executor_jid, Xm
               command_node["status"] = "executing";
               XmlNode actions("actions");
               XmlNode next("next");
-              next.close();
               actions.add_child(std::move(next));
-              actions.close();
               command_node.add_child(std::move(actions));
             }
         }
@@ -112,9 +104,7 @@ XmlNode AdhocCommandsHandler::handle_request(const std::string& executor_jid, Xm
           XmlNode error(ADHOC_NS":error");
           error["type"] = "modify";
           XmlNode condition(STANZA_NS":bad-request");
-          condition.close();
           error.add_child(std::move(condition));
-          error.close();
           command_node.add_child(std::move(error));
         }
     }
diff --git a/louloulibs/xmpp/xmpp_component.cpp b/louloulibs/xmpp/xmpp_component.cpp
index 8e89208..19111ba 100644
--- a/louloulibs/xmpp/xmpp_component.cpp
+++ b/louloulibs/xmpp/xmpp_component.cpp
@@ -89,12 +89,9 @@ void XmppComponent::on_connected()
 {
   log_info("connected to XMPP server");
   this->first_connection_try = true;
-  XmlNode node("", nullptr);
-  node.set_name("stream:stream");
-  node["xmlns"] = COMPONENT_NS;
-  node["xmlns:stream"] = STREAM_NS;
-  node["to"] = this->served_hostname;
-  this->send_stanza(node);
+  this->send_data("<stream:stream to='");
+  this->send_data(std::string{this->served_hostname});
+  this->send_data("' xmlns:stream='http://etherx.jabber.org/streams' xmlns='" COMPONENT_NS "'>");
   this->doc_open = true;
   // We may have some pending data to send: this happens when we try to send
   // some data before we are actually connected.  We send that data right now, if any
@@ -152,10 +149,9 @@ void XmppComponent::on_remote_stream_open(const XmlNode& node)
     sprintf(digest + (i*2), "%02x", result[i]);
   digest[HASH_LENGTH * 2] = '\0';
 
-  Stanza handshake(COMPONENT_NS":handshake");
-  handshake.set_inner(digest);
-  handshake.close();
-  this->send_stanza(handshake);
+  this->send_data("<handshake xmlns='" COMPONENT_NS "'>");
+  this->send_data(digest);
+  this->send_data("</handshake>");
 }
 
 void XmppComponent::on_remote_stream_close(const XmlNode& node)
@@ -192,9 +188,7 @@ void XmppComponent::send_stream_error(const std::string& name, const std::string
   error["xmlns"] = STREAM_NS;
   if (!explanation.empty())
     error.set_inner(explanation);
-  error.close();
   node.add_child(std::move(error));
-  node.close();
   this->send_stanza(node);
 }
 
@@ -220,19 +214,15 @@ void XmppComponent::send_stanza_error(const std::string& kind, const std::string
   error["type"] = error_type;
   XmlNode inner_error(defined_condition);
   inner_error["xmlns"] = STANZA_NS;
-  inner_error.close();
   error.add_child(std::move(inner_error));
   if (!text.empty())
     {
       XmlNode text_node("text");
       text_node["xmlns"] = STANZA_NS;
       text_node.set_inner(text);
-      text_node.close();
       error.add_child(std::move(text_node));
     }
-  error.close();
   node.add_child(std::move(error));
-  node.close();
   this->send_stanza(node);
 }
 
@@ -295,7 +285,6 @@ void XmppComponent::send_message(const std::string& from, Xmpp::body&& body, con
     node["type"] = type;
   XmlNode body_node("body");
   body_node.set_inner(std::get<0>(body));
-  body_node.close();
   node.add_child(std::move(body_node));
   if (std::get<1>(body))
     {
@@ -303,10 +292,8 @@ void XmppComponent::send_message(const std::string& from, Xmpp::body&& body, con
       html["xmlns"] = XHTMLIM_NS;
       // Pass the ownership of the pointer to this xmlnode
       html.add_child(std::get<1>(body).release());
-      html.close();
       node.add_child(std::move(html));
     }
-  node.close();
   this->send_stanza(node);
 }
 
@@ -336,19 +323,15 @@ void XmppComponent::send_user_join(const std::string& from,
       if (!preped_jid.empty())
         item["jid"] = preped_jid;
     }
-  item.close();
   x.add_child(std::move(item));
 
   if (self)
     {
       XmlNode status("status");
       status["code"] = "110";
-      status.close();
       x.add_child(std::move(status));
     }
-  x.close();
   node.add_child(std::move(x));
-  node.close();
   this->send_stanza(node);
 }
 
@@ -365,14 +348,12 @@ void XmppComponent::send_invalid_room_error(const std::string& muc_name,
   presence["type"] = "error";
   XmlNode x("x");
   x["xmlns"] = MUC_NS;
-  x.close();
   presence.add_child(std::move(x));
   XmlNode error("error");
   error["by"] = muc_name + "@" + this->served_hostname;
   error["type"] = "cancel";
   XmlNode item_not_found("item-not-found");
   item_not_found["xmlns"] = STANZA_NS;
-  item_not_found.close();
   error.add_child(std::move(item_not_found));
   XmlNode text("text");
   text["xmlns"] = STANZA_NS;
@@ -380,11 +361,8 @@ void XmppComponent::send_invalid_room_error(const std::string& muc_name,
   text.set_inner(muc_name +
                  " is not a valid IRC channel name. A correct room jid is of the form: #<chan>%<server>@" +
                  this->served_hostname);
-  text.close();
   error.add_child(std::move(text));
-  error.close();
   presence.add_child(std::move(error));
-  presence.close();
   this->send_stanza(presence);
 }
 
@@ -396,13 +374,11 @@ void XmppComponent::send_invalid_user_error(const std::string& user_name, const
   message["type"] = "error";
   XmlNode x("x");
   x["xmlns"] = MUC_NS;
-  x.close();
   message.add_child(std::move(x));
   XmlNode error("error");
   error["type"] = "cancel";
   XmlNode item_not_found("item-not-found");
   item_not_found["xmlns"] = STANZA_NS;
-  item_not_found.close();
   error.add_child(std::move(item_not_found));
   XmlNode text("text");
   text["xmlns"] = STANZA_NS;
@@ -410,11 +386,8 @@ void XmppComponent::send_invalid_user_error(const std::string& user_name, const
   text.set_inner(user_name +
                  " is not a valid IRC user name. A correct user jid is of the form: <nick>!<server>@" +
                  this->served_hostname);
-  text.close();
   error.add_child(std::move(text));
-  error.close();
   message.add_child(std::move(error));
-  message.close();
   this->send_stanza(message);
 }
 
@@ -426,9 +399,7 @@ void XmppComponent::send_topic(const std::string& from, Xmpp::body&& topic, cons
   message["type"] = "groupchat";
   XmlNode subject("subject");
   subject.set_inner(std::get<0>(topic));
-  subject.close();
   message.add_child(std::move(subject));
-  message.close();
   this->send_stanza(message);
 }
 
@@ -443,7 +414,6 @@ void XmppComponent::send_muc_message(const std::string& muc_name, const std::str
   message["type"] = "groupchat";
   XmlNode body("body");
   body.set_inner(std::get<0>(xmpp_body));
-  body.close();
   message.add_child(std::move(body));
   if (std::get<1>(xmpp_body))
     {
@@ -451,10 +421,8 @@ void XmppComponent::send_muc_message(const std::string& muc_name, const std::str
       html["xmlns"] = XHTMLIM_NS;
       // Pass the ownership of the pointer to this xmlnode
       html.add_child(std::get<1>(xmpp_body).release());
-      html.close();
       message.add_child(std::move(html));
     }
-  message.close();
   this->send_stanza(message);
 }
 
@@ -471,19 +439,15 @@ void XmppComponent::send_muc_leave(const std::string& muc_name, std::string&& ni
     {
       XmlNode status("status");
       status["code"] = "110";
-      status.close();
       x.add_child(std::move(status));
     }
-  x.close();
   presence.add_child(std::move(x));
   if (!message_str.empty())
     {
       XmlNode status("status");
       status.set_inner(message_str);
-      status.close();
       presence.add_child(std::move(status));
     }
-  presence.close();
   this->send_stanza(presence);
 }
 
@@ -503,22 +467,17 @@ void XmppComponent::send_nick_change(const std::string& muc_name,
   x["xmlns"] = MUC_USER_NS;
   XmlNode item("item");
   item["nick"] = new_nick;
-  item.close();
   x.add_child(std::move(item));
   XmlNode status("status");
   status["code"] = "303";
-  status.close();
   x.add_child(std::move(status));
   if (self)
     {
       XmlNode status2("status");
       status2["code"] = "110";
-      status2.close();
       x.add_child(std::move(status2));
     }
-  x.close();
   presence.add_child(std::move(x));
-  presence.close();
   this->send_stanza(presence);
 
   this->send_user_join(muc_name, new_nick, "", affiliation, role, jid_to, self);
@@ -542,21 +501,15 @@ void XmppComponent::kick_user(const std::string& muc_name,
   XmlNode actor("actor");
   actor["nick"] = author;
   actor["jid"] = author; // backward compatibility with old clients
-  actor.close();
   item.add_child(std::move(actor));
   XmlNode reason("reason");
   reason.set_inner(txt);
-  reason.close();
   item.add_child(std::move(reason));
-  item.close();
   x.add_child(std::move(item));
   XmlNode status("status");
   status["code"] = "307";
-  status.close();
   x.add_child(std::move(status));
-  x.close();
   presence.add_child(std::move(x));
-  presence.close();
   this->send_stanza(presence);
 }
 
@@ -574,7 +527,6 @@ void XmppComponent::send_presence_error(const std::string& muc_name,
   presence["type"] = "error";
   XmlNode x("x");
   x["xmlns"] = MUC_NS;
-  x.close();
   presence.add_child(std::move(x));
   XmlNode error("error");
   error["by"] = muc_name + "@" + this->served_hostname;
@@ -583,11 +535,8 @@ void XmppComponent::send_presence_error(const std::string& muc_name,
     error["code"] = error_code;
   XmlNode subnode(condition);
   subnode["xmlns"] = STANZA_NS;
-  subnode.close();
   error.add_child(std::move(subnode));
-  error.close();
   presence.add_child(std::move(error));
-  presence.close();
   this->send_stanza(presence);
 }
 
@@ -605,11 +554,8 @@ void XmppComponent::send_affiliation_role_change(const std::string& muc_name,
   XmlNode item("item");
   item["affiliation"] = affiliation;
   item["role"] = role;
-  item.close();
   x.add_child(std::move(item));
-  x.close();
   presence.add_child(std::move(x));
-  presence.close();
   this->send_stanza(presence);
 }
 
@@ -627,27 +573,21 @@ void XmppComponent::send_version(const std::string& id, const std::string& jid_t
     {
       XmlNode name("name");
       name.set_inner("biboumi");
-      name.close();
       query.add_child(std::move(name));
       XmlNode version("version");
       version.set_inner(SOFTWARE_VERSION);
-      version.close();
       query.add_child(std::move(version));
       XmlNode os("os");
       os.set_inner(SYSTEM_NAME);
-      os.close();
       query.add_child(std::move(os));
     }
   else
     {
       XmlNode name("name");
       name.set_inner(version);
-      name.close();
       query.add_child(std::move(name));
     }
-  query.close();
   iq.add_child(std::move(query));
-  iq.close();
   this->send_stanza(iq);
 }
 
@@ -669,12 +609,9 @@ void XmppComponent::send_adhoc_commands_list(const std::string& id, const std::s
       item["jid"] = this->served_hostname;
       item["node"] = kv.first;
       item["name"] = kv.second.name;
-      item.close();
       query.add_child(std::move(item));
     }
-  query.close();
   iq.add_child(std::move(query));
-  iq.close();
   this->send_stanza(iq);
 }
 
@@ -688,9 +625,7 @@ void XmppComponent::send_iq_version_request(const std::string& from,
   iq["to"] = jid_to;
   XmlNode query("query");
   query["xmlns"] = VERSION_NS;
-  query.close();
   iq.add_child(std::move(query));
-  iq.close();
   this->send_stanza(iq);
 }
 
@@ -704,7 +639,6 @@ void XmppComponent::send_iq_result(const std::string& id, const std::string& to_
   iq["to"] = to_jid;
   iq["id"] = id;
   iq["type"] = "result";
-  iq.close();
   this->send_stanza(iq);
 }
 
diff --git a/louloulibs/xmpp/xmpp_parser.cpp b/louloulibs/xmpp/xmpp_parser.cpp
index fbe525a..3903b73 100644
--- a/louloulibs/xmpp/xmpp_parser.cpp
+++ b/louloulibs/xmpp/xmpp_parser.cpp
@@ -104,7 +104,6 @@ void XmppParser::end_element(const XML_Char* name)
 {
   (void)name;
   level--;
-  this->current_node->close();
   if (level == 1)
     {
       this->stanza_event(*this->current_node);
diff --git a/louloulibs/xmpp/xmpp_stanza.cpp b/louloulibs/xmpp/xmpp_stanza.cpp
index 01d1d2e..c66b4be 100644
--- a/louloulibs/xmpp/xmpp_stanza.cpp
+++ b/louloulibs/xmpp/xmpp_stanza.cpp
@@ -84,8 +84,7 @@ std::string xml_unescape(const std::string& data)
 }
 
 XmlNode::XmlNode(const std::string& name, XmlNode* parent):
-  parent(parent),
-  closed(false)
+  parent(parent)
 {
   // split the namespace and the name
   auto n = name.rfind(":");
@@ -191,13 +190,6 @@ XmlNode* XmlNode::get_last_child() const
   return this->children.back();
 }
 
-void XmlNode::close()
-{
-  if (this->closed)
-    throw std::runtime_error("Closing an already closed XmlNode");
-  this->closed = true;
-}
-
 XmlNode* XmlNode::get_parent() const
 {
   return this->parent;
@@ -219,17 +211,14 @@ std::string XmlNode::to_string() const
   res += this->name;
   for (const auto& it: this->attributes)
     res += " " + it.first + "='" + sanitize(it.second) + "'";
-  if (this->closed && !this->has_children() && this->inner.empty())
+  if (!this->has_children() && this->inner.empty())
     res += "/>";
   else
     {
       res += ">" + sanitize(this->inner);
       for (const auto& child: this->children)
         res += child->to_string();
-      if (this->closed)
-        {
-          res += "</" + this->get_name() + ">";
-        }
+      res += "</" + this->get_name() + ">";
     }
   res += sanitize(this->tail);
   return res;
diff --git a/louloulibs/xmpp/xmpp_stanza.hpp b/louloulibs/xmpp/xmpp_stanza.hpp
index f1a6a0f..3d5b0c5 100644
--- a/louloulibs/xmpp/xmpp_stanza.hpp
+++ b/louloulibs/xmpp/xmpp_stanza.hpp
@@ -27,7 +27,6 @@ public:
   XmlNode(XmlNode&& node):
     name(std::move(node.name)),
     parent(node.parent),
-    closed(node.closed),
     attributes(std::move(node.attributes)),
     children(std::move(node.children)),
     inner(std::move(node.inner)),
@@ -42,7 +41,6 @@ public:
   XmlNode(const XmlNode& node):
     name(node.name),
     parent(nullptr),
-    closed(node.closed),
     attributes(node.attributes),
     children{},
     inner(node.inner),
@@ -106,10 +104,6 @@ public:
    * by calling has_children() for example.
    */
   XmlNode* get_last_child() const;
-  /**
-   * Mark this node as closed, nothing else
-   */
-  void close();
   XmlNode* get_parent() const;
   void set_name(const std::string& name);
   const std::string get_name() const;
@@ -140,7 +134,6 @@ public:
 private:
   std::string name;
   XmlNode* parent;
-  bool closed;
   std::unordered_map<std::string, std::string> attributes;
   std::vector<XmlNode*> children;
   std::string inner;
diff --git a/src/bridge/colors.cpp b/src/bridge/colors.cpp
index 3d40ac4..bdc34bf 100644
--- a/src/bridge/colors.cpp
+++ b/src/bridge/colors.cpp
@@ -80,7 +80,6 @@ Xmpp::body irc_format_to_xhtmlim(const std::string& s)
       else if (s[pos_end] == IRC_FORMAT_NEWLINE_CHAR)
         {
           XmlNode* br_node = new XmlNode("br");
-          br_node->close();
           current_node->add_child(br_node);
           cleaned += '\n';
         }
@@ -126,7 +125,6 @@ Xmpp::body irc_format_to_xhtmlim(const std::string& s)
       // close opened span, if any
       if (current_node != result.get())
         {
-          current_node->close();
           result->add_child(current_node);
           current_node = result.get();
         }
@@ -163,12 +161,8 @@ Xmpp::body irc_format_to_xhtmlim(const std::string& s)
     current_node->add_to_inner(txt);
 
   if (current_node != result.get())
-    {
-      current_node->close();
-      result->add_child(current_node);
-    }
+    result->add_child(current_node);
 
-  result->close();
   Xmpp::body body_res = std::make_tuple(cleaned, std::move(result));
   return body_res;
 }
diff --git a/src/xmpp/biboumi_adhoc_commands.cpp b/src/xmpp/biboumi_adhoc_commands.cpp
index 089eebf..0dcaf0c 100644
--- a/src/xmpp/biboumi_adhoc_commands.cpp
+++ b/src/xmpp/biboumi_adhoc_commands.cpp
@@ -10,18 +10,15 @@ void DisconnectUserStep1(XmppComponent* xmpp_component, AdhocSession&, XmlNode&
   x["type"] = "form";
   XmlNode title("title");
   title.set_inner("Disconnect a user from the gateway");
-  title.close();
   x.add_child(std::move(title));
   XmlNode instructions("instructions");
   instructions.set_inner("Choose a user JID and a quit message");
-  instructions.close();
   x.add_child(std::move(instructions));
   XmlNode jids_field("field");
   jids_field["var"] = "jids";
   jids_field["type"] = "list-multi";
   jids_field["label"] = "The JIDs to disconnect";
   XmlNode required("required");
-  required.close();
   jids_field.add_child(std::move(required));
   for (Bridge* bridge: biboumi_component->get_bridges())
     {
@@ -29,12 +26,9 @@ void DisconnectUserStep1(XmppComponent* xmpp_component, AdhocSession&, XmlNode&
       option["label"] = bridge->get_jid();
       XmlNode value("value");
       value.set_inner(bridge->get_jid());
-      value.close();
       option.add_child(std::move(value));
-      option.close();
       jids_field.add_child(std::move(option));
     }
-  jids_field.close();
   x.add_child(std::move(jids_field));
 
   XmlNode message_field("field");
@@ -43,11 +37,8 @@ void DisconnectUserStep1(XmppComponent* xmpp_component, AdhocSession&, XmlNode&
   message_field["label"] = "Quit message";
   XmlNode message_value("value");
   message_value.set_inner("Disconnected by admin");
-  message_value.close();
   message_field.add_child(std::move(message_value));
-  message_field.close();
   x.add_child(std::move(message_field));
-  x.close();
   command_node.add_child(std::move(x));
 }
 
@@ -95,7 +86,6 @@ void DisconnectUserStep2(XmppComponent* xmpp_component, AdhocSession& session, X
             note.set_inner("1 user has been disconnected.");
           else
             note.set_inner(std::to_string(num) + " users have been disconnected.");
-          note.close();
           command_node.add_child(std::move(note));
           return;
         }
@@ -103,9 +93,7 @@ void DisconnectUserStep2(XmppComponent* xmpp_component, AdhocSession& session, X
   XmlNode error(ADHOC_NS":error");
   error["type"] = "modify";
   XmlNode condition(STANZA_NS":bad-request");
-  condition.close();
   error.add_child(std::move(condition));
-  error.close();
   command_node.add_child(std::move(error));
   session.terminate();
 }
diff --git a/src/xmpp/biboumi_component.cpp b/src/xmpp/biboumi_component.cpp
index c1fa339..f578c30 100644
--- a/src/xmpp/biboumi_component.cpp
+++ b/src/xmpp/biboumi_component.cpp
@@ -321,7 +321,6 @@ void BiboumiComponent::handle_iq(const Stanza& stanza)
           else
             response["type"] = "result";
           response.add_child(std::move(inner_node));
-          response.close();
           this->send_stanza(response);
           stanza_error.disable();
         }
@@ -494,18 +493,14 @@ void BiboumiComponent::send_self_disco_info(const std::string& id, const std::st
   identity["category"] = "conference";
   identity["type"] = "irc";
   identity["name"] = "Biboumi XMPP-IRC gateway";
-  identity.close();
   query.add_child(std::move(identity));
   for (const std::string& ns: {DISCO_INFO_NS, MUC_NS, ADHOC_NS})
     {
       XmlNode feature("feature");
       feature["var"] = ns;
-      feature.close();
       query.add_child(std::move(feature));
     }
-  query.close();
   iq.add_child(std::move(query));
-  iq.close();
   this->send_stanza(iq);
 }
 
@@ -519,9 +514,7 @@ void BiboumiComponent::send_iq_version_request(const std::string& from,
   iq["to"] = jid_to;
   XmlNode query("query");
   query["xmlns"] = VERSION_NS;
-  query.close();
   iq.add_child(std::move(query));
-  iq.close();
   this->send_stanza(iq);
 }
 
@@ -536,9 +529,7 @@ void BiboumiComponent::send_ping_request(const std::string& from,
   iq["to"] = jid_to;
   XmlNode ping("ping");
   ping["xmlns"] = PING_NS;
-  ping.close();
   iq.add_child(std::move(ping));
-  iq.close();
   this->send_stanza(iq);
 
   auto result_cb = [from, id](Bridge* bridge, const Stanza& stanza)
@@ -571,11 +562,8 @@ void BiboumiComponent::send_iq_room_list_result(const std::string& id,
     {
       XmlNode item("item");
       item["jid"] = room.channel + "%" + from + "@" + this->served_hostname;
-      item.close();
       query.add_child(std::move(item));
     }
-  query.close();
   iq.add_child(std::move(query));
-  iq.close();
   this->send_stanza(iq);
 }