108 lines
3.2 KiB
JavaScript
108 lines
3.2 KiB
JavaScript
"use strict";
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/*
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* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
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* SPDX-License-Identifier: Apache-2.0.
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*/
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.isValidTopic = exports.isValidTopicFilter = exports.DEFAULT_KEEP_ALIVE = exports.normalize_payload_to_buffer = exports.normalize_payload = void 0;
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/**
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* @packageDocumentation
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*/
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/**
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* Converts payload to Buffer or string regardless of the supplied type
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* @param payload The payload to convert
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* @internal
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*/
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function normalize_payload(payload) {
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if (payload instanceof Buffer) {
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// pass Buffer through
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return payload;
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}
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if (typeof payload === 'string') {
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// pass string through
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return payload;
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}
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if (ArrayBuffer.isView(payload)) {
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// return Buffer with view upon the same bytes (no copy)
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const view = payload;
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return Buffer.from(view.buffer, view.byteOffset, view.byteLength);
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}
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if (payload instanceof ArrayBuffer) {
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// return Buffer with view upon the same bytes (no copy)
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return Buffer.from(payload);
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}
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if (typeof payload === 'object') {
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// Convert Object to JSON string
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return JSON.stringify(payload);
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}
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if (!payload) {
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return "";
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}
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throw new TypeError("payload parameter must be a string, object, or DataView.");
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}
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exports.normalize_payload = normalize_payload;
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/**
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* Converts payload to Buffer only, regardless of the supplied type
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* @param payload The payload to convert
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* @internal
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*/
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function normalize_payload_to_buffer(payload) {
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let normalized = normalize_payload(payload);
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if (typeof normalized === 'string') {
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// pass string through
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return Buffer.from(normalized);
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}
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return normalized;
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}
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exports.normalize_payload_to_buffer = normalize_payload_to_buffer;
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/** @internal */
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exports.DEFAULT_KEEP_ALIVE = 1200;
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function isValidTopicInternal(topic, isFilter) {
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if (topic.length === 0 || topic.length > 65535) {
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return false;
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}
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let sawHash = false;
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for (let segment of topic.split('/')) {
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if (sawHash) {
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return false;
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}
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if (segment.length === 0) {
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continue;
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}
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if (segment.includes("+")) {
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if (!isFilter) {
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return false;
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}
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if (segment.length > 1) {
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return false;
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}
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}
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if (segment.includes("#")) {
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if (!isFilter) {
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return false;
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}
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if (segment.length > 1) {
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return false;
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}
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sawHash = true;
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}
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}
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return true;
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}
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function isValidTopicFilter(topicFilter) {
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if (typeof (topicFilter) !== 'string') {
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return false;
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}
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let topicFilterAsString = topicFilter;
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return isValidTopicInternal(topicFilterAsString, true);
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}
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exports.isValidTopicFilter = isValidTopicFilter;
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function isValidTopic(topic) {
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if (typeof (topic) !== 'string') {
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return false;
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}
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let topicAsString = topic;
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return isValidTopicInternal(topicAsString, false);
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}
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exports.isValidTopic = isValidTopic;
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//# sourceMappingURL=mqtt_shared.js.map
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