diff --git a/main/manager.c b/main/manager.c
index 5fcd347166a136e371da21aaa8b008eba072d812..31d970942b333ce952f6de65094bd0dec4236b87 100644
--- a/main/manager.c
+++ b/main/manager.c
@@ -6873,7 +6873,7 @@ static int generic_http_callback(struct ast_tcptls_session_instance *ser,
 		 */
 		if (!(session = build_mansession(remote_address))) {
 			ast_http_request_close_on_completion(ser);
-			ast_http_error(ser, 500, "Server Error", "Internal Server Error (out of memory)\n");
+			ast_http_error(ser, 500, "Server Error", "Internal Server Error (out of memory)");
 			return 0;
 		}
 		ao2_lock(session);
@@ -6899,7 +6899,7 @@ static int generic_http_callback(struct ast_tcptls_session_instance *ser,
 
 	if (http_header == NULL || out == NULL) {
 		ast_http_request_close_on_completion(ser);
-		ast_http_error(ser, 500, "Server Error", "Internal Server Error (ast_str_create() out of memory)\n");
+		ast_http_error(ser, 500, "Server Error", "Internal Server Error (ast_str_create() out of memory)");
 		goto generic_callback_out;
 	}
 
@@ -6907,13 +6907,13 @@ static int generic_http_callback(struct ast_tcptls_session_instance *ser,
 	s.fd = mkstemp(template);	/* create a temporary file for command output */
 	unlink(template);
 	if (s.fd <= -1) {
-		ast_http_error(ser, 500, "Server Error", "Internal Server Error (mkstemp failed)\n");
+		ast_http_error(ser, 500, "Server Error", "Internal Server Error (mkstemp failed)");
 		goto generic_callback_out;
 	}
 	s.f = fdopen(s.fd, "w+");
 	if (!s.f) {
 		ast_log(LOG_WARNING, "HTTP Manager, fdopen failed: %s!\n", strerror(errno));
-		ast_http_error(ser, 500, "Server Error", "Internal Server Error (fdopen failed)\n");
+		ast_http_error(ser, 500, "Server Error", "Internal Server Error (fdopen failed)");
 		close(s.fd);
 		goto generic_callback_out;
 	}
@@ -7109,7 +7109,7 @@ static int auth_http_callback(struct ast_tcptls_session_instance *ser,
 	/* Digest found - parse */
 	if (ast_string_field_init(&d, 128)) {
 		ast_http_request_close_on_completion(ser);
-		ast_http_error(ser, 500, "Server Error", "Internal Server Error (out of memory)\n");
+		ast_http_error(ser, 500, "Server Error", "Internal Server Error (out of memory)");
 		return 0;
 	}
 
@@ -7138,7 +7138,7 @@ static int auth_http_callback(struct ast_tcptls_session_instance *ser,
 		AST_RWLIST_UNLOCK(&users);
 		ast_log(LOG_NOTICE, "%s failed to pass IP ACL as '%s'\n", ast_sockaddr_stringify_addr(&session->addr), d.username);
 		ast_http_request_close_on_completion(ser);
-		ast_http_error(ser, 403, "Permission denied", "Permission denied\n");
+		ast_http_error(ser, 403, "Permission denied", "Permission denied");
 		return 0;
 	}
 
@@ -7189,7 +7189,7 @@ static int auth_http_callback(struct ast_tcptls_session_instance *ser,
 		 */
 		if (!(session = build_mansession(remote_address))) {
 			ast_http_request_close_on_completion(ser);
-			ast_http_error(ser, 500, "Server Error", "Internal Server Error (out of memory)\n");
+			ast_http_error(ser, 500, "Server Error", "Internal Server Error (out of memory)");
 			return 0;
 		}
 		ao2_lock(session);
@@ -7257,13 +7257,13 @@ static int auth_http_callback(struct ast_tcptls_session_instance *ser,
 	s.fd = mkstemp(template);	/* create a temporary file for command output */
 	unlink(template);
 	if (s.fd <= -1) {
-		ast_http_error(ser, 500, "Server Error", "Internal Server Error (mkstemp failed)\n");
+		ast_http_error(ser, 500, "Server Error", "Internal Server Error (mkstemp failed)");
 		goto auth_callback_out;
 	}
 	s.f = fdopen(s.fd, "w+");
 	if (!s.f) {
 		ast_log(LOG_WARNING, "HTTP Manager, fdopen failed: %s!\n", strerror(errno));
-		ast_http_error(ser, 500, "Server Error", "Internal Server Error (fdopen failed)\n");
+		ast_http_error(ser, 500, "Server Error", "Internal Server Error (fdopen failed)");
 		close(s.fd);
 		goto auth_callback_out;
 	}
@@ -7321,7 +7321,7 @@ static int auth_http_callback(struct ast_tcptls_session_instance *ser,
 	out = ast_str_create(result_size * 2 + 512);
 	if (http_header == NULL || out == NULL) {
 		ast_http_request_close_on_completion(ser);
-		ast_http_error(ser, 500, "Server Error", "Internal Server Error (ast_str_create() out of memory)\n");
+		ast_http_error(ser, 500, "Server Error", "Internal Server Error (ast_str_create() out of memory)");
 		close_mansession_file(&s);
 		goto auth_callback_out;
 	}
diff --git a/res/ari/resource_channels.c b/res/ari/resource_channels.c
index 647344303064175032ea8bdc3ff33d30a8678d25..6cc00ce418ba55dbc82be7eddc92485577527e48 100644
--- a/res/ari/resource_channels.c
+++ b/res/ari/resource_channels.c
@@ -790,7 +790,7 @@ static void ari_channels_handle_originate_with_id(const char *args_endpoint,
 	if ((assignedids.uniqueid && AST_MAX_PUBLIC_UNIQUEID < strlen(assignedids.uniqueid))
 		|| (assignedids.uniqueid2 && AST_MAX_PUBLIC_UNIQUEID < strlen(assignedids.uniqueid2))) {
 		ast_ari_response_error(response, 400, "Bad Request",
-			"Uniqueid length exceeds maximum of %d\n", AST_MAX_PUBLIC_UNIQUEID);
+			"Uniqueid length exceeds maximum of %d", AST_MAX_PUBLIC_UNIQUEID);
 		return;
 	}
 
diff --git a/res/res_ari.c b/res/res_ari.c
index 0d80babbb2fc5e638dd57715b08f3a9f0d1b5fa9..2b6cb231bbf106f30d8a9423b2379b77a7b8f141 100644
--- a/res/res_ari.c
+++ b/res/res_ari.c
@@ -860,22 +860,27 @@ static int ast_ari_callback(struct ast_tcptls_session_instance *ser,
 	RAII_VAR(struct ast_str *, response_body, ast_str_create(256), ast_free);
 	RAII_VAR(struct ast_ari_conf_user *, user, NULL, ao2_cleanup);
 	struct ast_ari_response response = {};
-	int ret = 0;
 	RAII_VAR(struct ast_variable *, post_vars, NULL, ast_variables_destroy);
 
 	if (!response_body) {
-		return -1;
+		ast_http_request_close_on_completion(ser);
+		ast_http_error(ser, 500, "Server Error", "Out of memory");
+		return 0;
 	}
 
 	response.headers = ast_str_create(40);
 	if (!response.headers) {
-		return -1;
+		ast_http_request_close_on_completion(ser);
+		ast_http_error(ser, 500, "Server Error", "Out of memory");
+		return 0;
 	}
 
 	conf = ast_ari_config_get();
 	if (!conf || !conf->general) {
 		ast_free(response.headers);
-		return -1;
+		ast_http_request_close_on_completion(ser);
+		ast_http_error(ser, 500, "Server Error", "URI handler config missing");
+		return 0;
 	}
 
 	process_cors_request(headers, &response);
@@ -893,9 +898,10 @@ static int ast_ari_callback(struct ast_tcptls_session_instance *ser,
 				"Request body too large");
 			goto request_failed;
 		case ENOMEM:
+			ast_http_request_close_on_completion(ser);
 			ast_ari_response_error(&response, 500,
 				"Internal Server Error",
-				"Error processing request");
+				"Out of memory");
 			goto request_failed;
 		case EIO:
 			ast_ari_response_error(&response, 400,
@@ -940,6 +946,7 @@ static int ast_ari_callback(struct ast_tcptls_session_instance *ser,
 			"WWW-Authenticate: Basic realm=\"%s\"\r\n",
 			conf->general->auth_realm);
 	} else if (!ast_fully_booted) {
+		ast_http_request_close_on_completion(ser);
 		ast_ari_response_error(&response, 503, "Service Unavailable", "Asterisk not booted");
 	} else if (user->read_only && method != AST_HTTP_GET && method != AST_HTTP_OPTIONS) {
 		ast_ari_response_error(&response, 403, "Forbidden", "Write access denied");
@@ -986,7 +993,6 @@ request_failed:
 			response.response_text = "Internal Server Error";
 			ast_str_set(&response_body, 0, "%s", "");
 			ast_str_set(&response.headers, 0, "%s", "");
-			ret = -1;
 		}
 	}
 
@@ -999,7 +1005,7 @@ request_failed:
 	response_body = NULL;
 
 	ast_json_unref(response.message);
-	return ret;
+	return 0;
 }
 
 static struct ast_http_uri http_uri = {