fix wasm session and mysql placeholder state

site/tests/services.uce

@@ -107,6 +107,14 @@ RENDER(Request& context)
 		mysql_placeholder_error.find("positional ? placeholders are not supported") != String::npos ? "pass" : "fail",
 		mysql_placeholder_error
 	);
+	StringMap underscore_params;
+	underscore_params["display_name"] = "Ada";
+	String parsed_underscore = placeholder_guard.parse_query_parameters("select :display_name as name", underscore_params);
+	mark(
+		"mysql named placeholders accept underscores",
+		parsed_underscore.find("'Ada'") != String::npos && parsed_underscore.find("_name") == String::npos ? "pass" : "fail",
+		parsed_underscore
+	);
 
 	MySQL mysql;
 	mysql.connect("127.0.0.1", "root", "");

src/lib/mysql-connector.cpp

@@ -294,7 +294,7 @@ String MySQL::parse_query_parameters(String query, StringMap map)
 		}
 		else if(mode == 1) // identifier mode
 		{
-			if(isalnum(c))
+			if(isalnum(c) || c == '_')
 			{
 				identifier.append(1, c);
 			}

src/wasm/backend.cpp

@@ -133,11 +133,16 @@ String wasm_backend_serve(Request& request, const String& entry_unit, const Stri
 		for(auto& entry : source)
 			ctx[key][entry.first] = entry.second;
 	};
+	if(request.server)
+		copy_map(request.server->config, "server_config");
 	copy_map(request.params, "params");
 	copy_map(request.get, "get");
 	copy_map(request.post, "post");
 	copy_map(request.cookies, "cookies");
 	copy_map(request.session, "session");
+	ctx["session_id"] = request.session_id;
+	ctx["session_name"] = request.session_name;
+	ctx["session_loaded_hash"] = request.session_loaded_hash;
 	ctx["entry_unit"] = entry_unit;
 	// Raw request body: cli_input() parses a JSON CLI payload from context.in,
 	// and serve_http handlers read it as req->in; carried into the workspace.
@@ -233,6 +238,12 @@ String wasm_backend_serve(Request& request, const String& entry_unit, const Stri
 			request.session[name] = value.to_string();
 		});
 	}
+	if(response.meta.key("session_id"))
+		request.session_id = response.meta["session_id"].to_string();
+	if(response.meta.key("session_name"))
+		request.session_name = response.meta["session_name"].to_string();
+	if(response.meta.key("session_loaded_hash"))
+		request.session_loaded_hash = response.meta["session_loaded_hash"].to_string();
 
 	// body into the request's primary output stream (ob_stack[0]); the
 	// transport's assemble_output_buffer concatenates the stack

src/wasm/core.cpp

@@ -222,7 +222,7 @@ String MySQL::parse_query_parameters(String query, StringMap map)
 		}
 		else if(mode == 1)
 		{
-			if(isalnum(c))
+			if(isalnum(c) || c == '_')
 				identifier.append(1, c);
 			else
 			{
@@ -761,6 +761,9 @@ void uce_wasm_core_reset_request()
 	wasm_response_meta = "";
 	wasm_request.cookies.clear();
 	wasm_request.session.clear();
+	wasm_request.session_id = "";
+	wasm_request.session_name = "";
+	wasm_request.session_loaded_hash = "";
 	wasm_request.out = "";
 	wasm_request.resources.current_unit_file = "";
 	wasm_component_slots.clear();
@@ -787,11 +790,19 @@ int uce_wasm_apply_context(const char* buf, size_t len)
 				dest[key] = item.to_string();
 			});
 	};
+	if(decoded.key("server_config"))
+		apply_map(decoded.key("server_config"), wasm_server.config);
 	apply_map(decoded.key("params"), wasm_request.params);
 	apply_map(decoded.key("get"), wasm_request.get);
 	apply_map(decoded.key("post"), wasm_request.post);
 	apply_map(decoded.key("cookies"), wasm_request.cookies);
 	apply_map(decoded.key("session"), wasm_request.session);
+	if(DValue* session_id = decoded.key("session_id"))
+		wasm_request.session_id = session_id->to_string();
+	if(DValue* session_name = decoded.key("session_name"))
+		wasm_request.session_name = session_name->to_string();
+	if(DValue* session_loaded_hash = decoded.key("session_loaded_hash"))
+		wasm_request.session_loaded_hash = session_loaded_hash->to_string();
 	DValue* entry = decoded.key("entry_unit");
 	if(entry)
 		wasm_request.resources.current_unit_file = entry->to_string();
@@ -847,6 +858,9 @@ void uce_wasm_finish_response_meta()
 	}
 	for(auto& entry : wasm_request.session)
 		meta["session"][entry.first] = entry.second;
+	meta["session_id"] = wasm_request.session_id;
+	meta["session_name"] = wasm_request.session_name;
+	meta["session_loaded_hash"] = wasm_request.session_loaded_hash;
 	bool ws_has_commands = !wasm_request.resources.websocket_dispatch_commands._map.empty();
 	bool ws_state_changed = false;
 	if(wasm_request.resources.websocket_dispatch_capture)