feat(share): WeChat JS-SDK signature + footer share config
Port zibll WeChatShare: ticket/token cache, page image resolution, jweixin enqueue, and WeChatShareDate for in-app timeline/message share.
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@@ -0,0 +1,260 @@
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<?php
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/**
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* WeChat JS-SDK share signature (zibll ZibWeChatShare parity).
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*
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* @package AKSRT
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*/
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namespace AKSRT\Frontend;
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defined('ABSPATH') || exit;
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class WeChatShare {
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private static $instance = null;
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/** @var array{wechat_enabled:bool,wechat_appid:string,wechat_app_secret:string,only_logo:bool} */
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private $config = [];
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public static function get_instance(): self {
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if (null === self::$instance) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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public function init(): void {
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$this->config = class_exists('\AKSRT\Settings\Settings')
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? \AKSRT\Settings\Settings::get_share_settings()
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: [];
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if (empty($this->config['wechat_enabled'])) {
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return;
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}
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if (empty($this->config['wechat_appid']) || empty($this->config['wechat_app_secret'])) {
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return;
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}
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add_action('wp_enqueue_scripts', [$this, 'enqueue_sdk'], 20);
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add_action('wp_footer', [$this, 'print_share_date'], 99);
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}
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public function enqueue_sdk(): void {
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// Only needed in WeChat browser, but enqueue lightly for all (script is external CDN).
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wp_enqueue_script(
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'aksrt-jweixin',
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'https://res.wx.qq.com/open/js/jweixin-1.6.0.js',
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[],
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'1.6.0',
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true
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);
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// Ensure our bridge runs after jweixin.
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if (wp_script_is('aksrt-weixin-share', 'registered') || wp_script_is('aksrt-weixin-share', 'enqueued')) {
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wp_script_add_data('aksrt-weixin-share', 'group', 1);
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}
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}
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public function print_share_date(): void {
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$url = $this->current_url();
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$sign = $this->get_sign($url);
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if (!$sign) {
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return;
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}
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$img = $this->resolve_image();
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$title = wp_get_document_title();
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$desc = '';
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if (is_singular()) {
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$post = get_post();
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if ($post) {
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$desc = wp_strip_all_tags(get_the_excerpt($post));
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}
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}
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if ($desc === '') {
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$desc = (string) get_bloginfo('description');
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}
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$payload = [
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'appId' => $sign['appId'],
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'timestamp' => (string) $sign['timestamp'],
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'nonceStr' => $sign['nonceStr'],
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'signature' => $sign['signature'],
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'url' => $url,
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'title' => $title,
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'img' => $img,
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'desc' => $desc,
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];
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?>
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<script type="text/javascript">
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window.WeChatShareDate = <?php echo wp_json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES); ?>;
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(function () {
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function applyConfig() {
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if (!window.wx || typeof window.wx.config !== 'function' || !window.WeChatShareDate) return;
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var e = window.WeChatShareDate;
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try {
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window.wx.config({
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debug: false,
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appId: e.appId,
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timestamp: e.timestamp,
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nonceStr: e.nonceStr,
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signature: e.signature,
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jsApiList: ['updateTimelineShareData', 'updateAppMessageShareData']
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});
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window.wx.ready(function () {
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var title = e.title || document.title;
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var link = e.url || window.location.href;
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var desc = e.desc || ((document.querySelector('meta[name="description"]') || {}).content || '');
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var img = e.img || '';
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if (typeof window.wx.updateTimelineShareData === 'function') {
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window.wx.updateTimelineShareData({ title: title, link: link, imgUrl: img });
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}
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if (typeof window.wx.updateAppMessageShareData === 'function') {
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window.wx.updateAppMessageShareData({ title: title, desc: desc, link: link, imgUrl: img });
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}
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});
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} catch (err) {}
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}
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if (document.readyState === 'loading') {
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document.addEventListener('DOMContentLoaded', function () { setTimeout(applyConfig, 50); });
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} else {
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setTimeout(applyConfig, 50);
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}
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})();
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</script>
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<?php
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}
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/**
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* @return array{appId:string,nonceStr:string,timestamp:int,signature:string}|null
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*/
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public function get_sign(string $url): ?array {
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$ticket = $this->get_jsapi_ticket();
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if ($ticket === '') {
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return null;
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}
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$timestamp = time();
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$nonce = $this->nonce_string();
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$raw = "jsapi_ticket={$ticket}&noncestr={$nonce}×tamp={$timestamp}&url={$url}";
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return [
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'appId' => (string) $this->config['wechat_appid'],
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'nonceStr' => $nonce,
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'timestamp' => $timestamp,
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'signature' => sha1($raw),
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];
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}
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private function current_url(): string {
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$https = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off')
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|| (isset($_SERVER['SERVER_PORT']) && (int) $_SERVER['SERVER_PORT'] === 443)
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|| (!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https');
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$protocol = $https ? 'https://' : 'http://';
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$host = isset($_SERVER['HTTP_HOST']) ? sanitize_text_field(wp_unslash((string) $_SERVER['HTTP_HOST'])) : wp_parse_url(home_url('/'), PHP_URL_HOST);
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$uri = isset($_SERVER['REQUEST_URI']) ? (string) wp_unslash($_SERVER['REQUEST_URI']) : '/';
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// Drop hash fragment if any (should not be present in REQUEST_URI).
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return $protocol . $host . $uri;
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}
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private function resolve_image(): string {
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$only_logo = !empty($this->config['only_logo']);
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$default = '';
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if (!empty($this->config['share_img'])) {
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$default = (string) $this->config['share_img'];
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} elseif (class_exists('\AKSRT\Settings\Settings')) {
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$default = (string) (\AKSRT\Settings\Settings::get_value('favicon', '') ?: \AKSRT\Settings\Settings::get_value('iconpng', ''));
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}
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if ($only_logo) {
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return $default;
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}
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$pic = '';
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if (is_singular()) {
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$post_id = get_queried_object_id();
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if ($post_id && has_post_thumbnail($post_id)) {
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$pic = (string) get_the_post_thumbnail_url($post_id, 'full');
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}
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} elseif (is_author()) {
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$author = get_queried_object();
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if ($author && !empty($author->ID)) {
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$pic = (string) get_user_meta((int) $author->ID, 'custom_avatar', true);
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if ($pic === '') {
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$pic = get_avatar_url((int) $author->ID, ['size' => 300]);
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}
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}
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} elseif (is_category() || is_tag() || is_tax()) {
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$term = get_queried_object();
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if ($term && !empty($term->term_id)) {
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$img_id = (int) get_term_meta((int) $term->term_id, 'thumbnail_id', true);
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if ($img_id) {
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$pic = (string) (wp_get_attachment_image_url($img_id, 'full') ?: '');
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}
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}
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}
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return $pic !== '' ? $pic : $default;
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}
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private function get_jsapi_ticket(): string {
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$opt = get_option('aksrt_wechatshare_ticket', []);
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$now = time() + 300;
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if (is_array($opt) && !empty($opt['ticket']) && !empty($opt['expiration_time']) && (int) $opt['expiration_time'] > $now) {
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return (string) $opt['ticket'];
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}
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$token = $this->get_access_token();
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if ($token === '') {
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return '';
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}
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$url = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=' . rawurlencode($token) . '&type=jsapi';
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$res = $this->http_json($url);
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if (empty($res['ticket'])) {
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return '';
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}
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$res['expiration_time'] = time() + max(60, (int) ($res['expires_in'] ?? 7200));
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update_option('aksrt_wechatshare_ticket', $res, false);
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return (string) $res['ticket'];
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}
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private function get_access_token(): string {
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// Prefer shared GZH token cache when present.
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$opt = get_option('aksrt_weixingzh_access_token', []);
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$now = time() + 300;
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if (is_array($opt) && !empty($opt['access_token']) && !empty($opt['expiration_time']) && (int) $opt['expiration_time'] > $now) {
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return (string) $opt['access_token'];
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}
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$appid = (string) $this->config['wechat_appid'];
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$secret = (string) $this->config['wechat_app_secret'];
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$url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=' . rawurlencode($appid) . '&secret=' . rawurlencode($secret);
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$res = $this->http_json($url);
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if (empty($res['access_token'])) {
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return '';
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}
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$res['expiration_time'] = time() + max(60, (int) ($res['expires_in'] ?? 7200));
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update_option('aksrt_weixingzh_access_token', $res, false);
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return (string) $res['access_token'];
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}
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/**
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* @return array<string,mixed>
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*/
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private function http_json(string $url): array {
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$response = wp_remote_get($url, [
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'timeout' => 8,
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'headers' => ['Accept' => 'application/json'],
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]);
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if (is_wp_error($response)) {
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return [];
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}
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$body = (string) wp_remote_retrieve_body($response);
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$data = json_decode($body, true);
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return is_array($data) ? $data : [];
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}
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private function nonce_string(int $length = 16): string {
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$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
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$str = '';
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$max = strlen($chars) - 1;
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for ($i = 0; $i < $length; $i++) {
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$str .= $chars[random_int(0, $max)];
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}
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return $str;
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}
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}
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