276 lines
11 KiB
PHP
276 lines
11 KiB
PHP
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<?php
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namespace App\Service\common\wechat;
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use App\BaseApp\BaseClient;
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use App\Service\common\RedisService;
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use GuzzleHttp\Exception\GuzzleException;
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/**
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* 微信公众号 API 客户端（继承 BaseClient，禁止业务代码直接 new Guzzle）
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*
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* 职责：
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* 1. stable_token 获取 + Redis 缓存（key 前缀 config('nl.redis.wechat_token')，TTL 随微信返回的 expires_in）
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* 2. 正文外链图搬家：media/uploadimg（公众号正文只认微信图床 URL）
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* 3. 封面永久素材：material/add_material 取 thumb_media_id
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* 4. 草稿 draft/add、发布 freepublish/submit、发布状态 freepublish/get
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*
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* 为什么单独封 postWxJson / postWxMultipart：
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* - BaseClient::postJson 用 Guzzle 的 json 选项，中文会被 unicode 转义，微信标题/摘要偶发显示 \uXXXX，
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* 这里手动 JSON_UNESCAPED_UNICODE 编码后按 body 发送
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* - 素材上传要 multipart 文件流，BaseClient 没有该能力，本类内部补齐（复用父类 init 的 Guzzle 实例）
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*/
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class WechatApiClient extends BaseClient
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{
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protected string $baseUrl = 'https://api.weixin.qq.com';
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/**
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* 常见错误码 → 人话（其余透出 errcode + errmsg 原文）
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*/
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private const ERROR_MAP = [
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40001 => 'AppSecret 错误或 access_token 已失效，请检查账号配置',
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40013 => 'AppID 无效，请检查账号配置',
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40125 => 'AppSecret 无效，请检查账号配置',
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41004 => '缺少 AppSecret 参数',
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40164 => '服务器出口 IP 不在公众号后台的 IP 白名单中，请到公众平台「设置与开发-安全中心」添加',
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48001 => '该公众号无此接口权限（个人订阅号无发布能力，需认证服务号/订阅号）',
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45009 => '接口调用次数超过当日限额，请明天再试',
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45028 => '该公众号无留言/相关高级能力权限',
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40007 => '无效的 media_id，素材可能已过期，请重新发布',
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53503 => '该草稿未通过发布检查',
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53504 => '需前往公众平台官网使用草稿',
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53505 => '请手动保存成功后再发布',
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];
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/**
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* 获取稳定版 access_token（优先走 Redis 缓存）
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*
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* 为什么用 stable_token 而不是旧 token 接口：stable 模式重复获取不会互踢，
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* 多实例/双后端（Laravel+GF）共用同一个 Redis key 也不会导致 token 失效竞争
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*
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* @param string $appid 公众号 AppID
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* @param string $secret AppSecret 明文（调用方负责解密）
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* @param bool $forceRefresh true 时绕过缓存强刷（如 token 失效重试场景）
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*/
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public function getStableToken(string $appid, string $secret, bool $forceRefresh = false): string
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{
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$redis = RedisService::getInstance()->init((string) config('nl.redis.wechat_token', 'nl_wechat_at_'));
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if (!$forceRefresh) {
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$cached = $redis->get($appid);
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if (!empty($cached)) {
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return (string) $cached;
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}
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}
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$body = $this->postWxJson('/cgi-bin/stable_token', [
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'grant_type' => 'client_credential',
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'appid' => $appid,
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'secret' => $secret,
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'force_refresh' => $forceRefresh,
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], '获取access_token');
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$token = (string) ($body['access_token'] ?? '');
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if ($token === '') {
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$this->utils->errorThrow('获取 access_token 失败：微信未返回 token');
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}
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// 提前 5 分钟过期，避免边界时刻拿到将失效的 token
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$expire = max(60, (int) ($body['expires_in'] ?? 7200) - 300);
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$redis->set($appid, $token, $expire);
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return $token;
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}
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/**
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* 校验 appid/secret 连通性（不落缓存，直接强刷验证凭据有效）
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* 返回微信侧 expires_in，便于前端提示
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*/
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public function testCredential(string $appid, string $secret): array
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{
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$body = $this->postWxJson('/cgi-bin/stable_token', [
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'grant_type' => 'client_credential',
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'appid' => $appid,
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'secret' => $secret,
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], '测试连通');
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return [
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'ok' => true,
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'expires_in' => (int) ($body['expires_in'] ?? 0),
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];
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}
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/**
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* 正文图片搬家：下载外链图后传微信图床，返回微信侧 URL
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* 微信限制：仅 jpg/png、单张 ≤1MB；该 URL 不占素材库额度，仅可用于图文正文
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*/
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public function uploadContentImage(string $token, string $imageUrl): string
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{
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[$content, $ext] = $this->downloadImage($imageUrl);
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if (!in_array($ext, ['jpg', 'jpeg', 'png'], true)) {
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$this->utils->errorThrow("正文图片仅支持 jpg/png：{$imageUrl}");
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}
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if (strlen($content) > 1024 * 1024) {
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$this->utils->errorThrow("正文图片超过 1MB，无法上传微信图床：{$imageUrl}");
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}
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$body = $this->postWxMultipart(
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'/cgi-bin/media/uploadimg?access_token=' . $token,
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'media', $content, 'content_' . substr(md5($imageUrl), 0, 8) . '.' . $ext,
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'正文图片上传'
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);
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$url = (string) ($body['url'] ?? '');
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if ($url === '') {
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$this->utils->errorThrow('正文图片上传微信图床失败：未返回 URL');
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}
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return $url;
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}
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/**
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* 封面图上传为永久图片素材，返回 media_id（草稿 thumb_media_id 用）
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* 微信限制：图片素材 ≤10MB，支持 bmp/png/jpeg/jpg/gif
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*/
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public function addImageMaterial(string $token, string $imageUrl): string
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{
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[$content, $ext] = $this->downloadImage($imageUrl);
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if (strlen($content) > 10 * 1024 * 1024) {
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$this->utils->errorThrow("封面图超过 10MB，无法上传素材库：{$imageUrl}");
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}
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$body = $this->postWxMultipart(
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'/cgi-bin/material/add_material?access_token=' . $token . '&type=image',
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'media', $content, 'cover_' . substr(md5($imageUrl), 0, 8) . '.' . $ext,
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'封面素材上传'
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);
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$mediaId = (string) ($body['media_id'] ?? '');
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if ($mediaId === '') {
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$this->utils->errorThrow('封面上传素材库失败：未返回 media_id');
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}
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return $mediaId;
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}
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/**
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* 新建草稿，返回草稿 media_id
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*
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* @param array $article 单篇图文：title/author/digest/content/thumb_media_id 等
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*/
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public function addDraft(string $token, array $article): string
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{
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$body = $this->postWxJson('/cgi-bin/draft/add?access_token=' . $token, [
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'articles' => [$article],
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], '新建草稿');
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$mediaId = (string) ($body['media_id'] ?? '');
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if ($mediaId === '') {
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$this->utils->errorThrow('新建草稿失败：未返回 media_id');
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}
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return $mediaId;
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}
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/**
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* 提交发布任务（freepublish 为异步审核，返回 publish_id 供轮询）
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*/
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public function submitPublish(string $token, string $mediaId): string
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{
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$body = $this->postWxJson('/cgi-bin/freepublish/submit?access_token=' . $token, [
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'media_id' => $mediaId,
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], '提交发布');
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$publishId = (string) ($body['publish_id'] ?? '');
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if ($publishId === '') {
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$this->utils->errorThrow('提交发布失败：未返回 publish_id');
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}
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return $publishId;
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}
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/**
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* 查询发布任务状态
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* publish_status：0成功 1发布中 2原创审核不通过 3常规失败 4平台审核不通过 5成功后用户删除 6成功后系统封禁
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*/
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public function getPublishStatus(string $token, string $publishId): array
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{
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return $this->postWxJson('/cgi-bin/freepublish/get?access_token=' . $token, [
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'publish_id' => $publishId,
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], '查询发布状态');
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}
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/**
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* 微信 JSON 接口统一出口：JSON_UNESCAPED_UNICODE 编码 + errcode 校验
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*
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* @param string $scene 场景名（拼错误提示用）
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*/
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private function postWxJson(string $uri, array $data, string $scene): array
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{
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$this->init();
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try {
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$response = $this->client->request('POST', $uri, [
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'body' => json_encode($data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
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'headers' => ['Content-Type' => 'application/json'],
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]);
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$body = json_decode((string) $response->getBody(), true) ?: [];
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} catch (GuzzleException $e) {
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$this->utils->errorThrow("微信接口请求失败（{$scene}）：" . $e->getMessage());
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return [];
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}
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$this->assertWxOk($body, $scene);
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return $body;
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}
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/**
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* 微信 multipart 文件上传统一出口
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*/
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private function postWxMultipart(string $uri, string $field, string $content, string $filename, string $scene): array
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{
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$this->init();
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try {
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$response = $this->client->request('POST', $uri, [
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'multipart' => [[
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'name' => $field,
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'contents' => $content,
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'filename' => $filename,
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]],
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]);
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$body = json_decode((string) $response->getBody(), true) ?: [];
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} catch (GuzzleException $e) {
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$this->utils->errorThrow("微信接口请求失败（{$scene}）：" . $e->getMessage());
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return [];
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}
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$this->assertWxOk($body, $scene);
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return $body;
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}
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/**
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* errcode 非 0 即失败，映射常见错误码后抛业务异常
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*/
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private function assertWxOk(array $body, string $scene): void
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{
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$errcode = (int) ($body['errcode'] ?? 0);
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if ($errcode === 0) {
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return;
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}
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$friendly = self::ERROR_MAP[$errcode] ?? ('errmsg: ' . (string) ($body['errmsg'] ?? '未知错误'));
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$this->utils->errorThrow("微信{$scene}失败（{$errcode}）：{$friendly}");
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}
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/**
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* 下载图片（本地/OSS/任意外链），返回 [二进制内容, 扩展名]
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* 为什么按 Content-Type 兜底扩展名：OSS 直链可能不带扩展名，微信上传要求文件名有效
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*/
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private function downloadImage(string $url): array
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{
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$this->init();
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try {
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$response = $this->client->request('GET', $url, ['timeout' => 30]);
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} catch (GuzzleException $e) {
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$this->utils->errorThrow("下载图片失败：{$url}（" . $e->getMessage() . '）');
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return ['', ''];
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}
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$content = (string) $response->getBody();
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if ($content === '') {
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$this->utils->errorThrow("下载图片失败：{$url}（内容为空）");
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}
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// 优先从 URL 扩展名判断，取不到再从 Content-Type 兜底
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$ext = strtolower(pathinfo(parse_url($url, PHP_URL_PATH) ?: '', PATHINFO_EXTENSION));
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if (!in_array($ext, ['jpg', 'jpeg', 'png', 'gif', 'bmp'], true)) {
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$contentType = strtolower($response->getHeaderLine('Content-Type'));
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$ext = match (true) {
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str_contains($contentType, 'png') => 'png',
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str_contains($contentType, 'gif') => 'gif',
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str_contains($contentType, 'bmp') => 'bmp',
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default => 'jpg',
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};
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}
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return [$content, $ext];
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}
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}
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