批量优化
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package wechatmini
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"sync"
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"time"
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)
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// =============================================================
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// 微信小程序服务端 API
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// 1. GET /sns/jscode2session code → openid / unionid / session_key
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// 2. POST /wxa/business/getuserphonenumber phone_code → 手机号（需 access_token）
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// =============================================================
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const apiBase = "https://api.weixin.qq.com"
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var httpClient = &http.Client{Timeout: 10 * time.Second}
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// APIError 微信接口业务错误（HTTP 200 但 errcode 非 0）
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type APIError struct {
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API string
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Code int
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Msg string
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}
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func (e *APIError) Error() string {
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return fmt.Sprintf("%s 失败：errcode=%d errmsg=%s", e.API, e.Code, e.Msg)
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}
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// Explain 返回常见 errcode 的中文排查建议；未知错误码返回空串
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func (e *APIError) Explain() string {
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switch e.Code {
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case 40029:
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return "code 无效或已过期：请重新调用 wx.login / uni.login 获取 code 后立即重试"
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case 40163:
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return "code 已被使用：同一次 code 只能兑换一次，请重新获取"
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case 40013:
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return "AppID 无效：请核对小程序后台「开发 → 开发管理」中的 AppID"
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case 40125:
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return "AppSecret 错误：请在小程序后台重置后复制新的 AppSecret 填入本页"
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case 40226:
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return "该小程序未开通手机号快速验证能力：请在「开发管理 → 接口设置」中开通"
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case 45009:
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return "接口调用频次超限：请稍后重试"
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}
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return ""
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}
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// ExplainError 提取中文排查建议；无可用建议时返回 ("", false)
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func ExplainError(err error) (string, bool) {
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if ae, ok := err.(*APIError); ok {
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if hint := ae.Explain(); hint != "" {
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return hint, true
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}
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}
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return "", false
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}
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// ============================ code 换 openid ============================
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// Session jscode2session 返回结果
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type Session struct {
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OpenID string `json:"openid"`
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UnionID string `json:"unionid"`
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SessionKey string `json:"session_key"`
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}
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// Code2Session 用 wx.login / uni.login 拿到的 code 换 openid（+ unionid）
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func Code2Session(cfg *Config, code string) (*Session, error) {
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if cfg == nil || cfg.AppID == "" || cfg.AppSecret == "" {
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return nil, ErrNotConfigured
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}
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api := fmt.Sprintf("%s/sns/jscode2session?appid=%s&secret=%s&js_code=%s&grant_type=authorization_code",
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apiBase, url.QueryEscape(cfg.AppID), url.QueryEscape(cfg.AppSecret), url.QueryEscape(code))
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var resp struct {
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OpenID string `json:"openid"`
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UnionID string `json:"unionid"`
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SessionKey string `json:"session_key"`
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ErrCode int `json:"errcode"`
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ErrMsg string `json:"errmsg"`
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}
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if err := httpGetJSON(api, &resp); err != nil {
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return nil, err
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}
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if resp.OpenID == "" {
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return nil, &APIError{API: "code 换取 openid", Code: resp.ErrCode, Msg: resp.ErrMsg}
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}
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return &Session{OpenID: resp.OpenID, UnionID: resp.UnionID, SessionKey: resp.SessionKey}, nil
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}
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// ============================ 手机号快速验证 ============================
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// PhoneNumber getuserphonenumber 返回结果
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type PhoneNumber struct {
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PhoneNumber string `json:"phoneNumber"`
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PurePhoneNumber string `json:"purePhoneNumber"`
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CountryCode string `json:"countryCode"`
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}
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// GetPhoneNumber 用 getPhoneNumber 事件返回的动态 code 换真实手机号。
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// 仅企业主体小程序可用；未开通该能力时微信返回 40226。
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func GetPhoneNumber(cfg *Config, phoneCode string) (*PhoneNumber, error) {
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if cfg == nil || cfg.AppID == "" || cfg.AppSecret == "" {
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return nil, ErrNotConfigured
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}
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token, err := getAccessToken(cfg)
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if err != nil {
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return nil, err
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}
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api := fmt.Sprintf("%s/wxa/business/getuserphonenumber?access_token=%s", apiBase, url.QueryEscape(token))
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payload := map[string]interface{}{"code": phoneCode}
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var resp struct {
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PhoneInfo struct {
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PhoneNumber string `json:"phoneNumber"`
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PurePhoneNumber string `json:"purePhoneNumber"`
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CountryCode string `json:"countryCode"`
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} `json:"phone_info"`
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ErrCode int `json:"errcode"`
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ErrMsg string `json:"errmsg"`
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}
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if err := httpPostJSON(api, payload, &resp); err != nil {
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return nil, err
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}
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if resp.ErrCode != 0 || resp.PhoneInfo.PhoneNumber == "" {
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return nil, &APIError{API: "获取手机号", Code: resp.ErrCode, Msg: resp.ErrMsg}
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}
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return &PhoneNumber{
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PhoneNumber: resp.PhoneInfo.PhoneNumber,
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PurePhoneNumber: resp.PhoneInfo.PurePhoneNumber,
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CountryCode: resp.PhoneInfo.CountryCode,
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}, nil
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}
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// ============================ access_token 缓存 ============================
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type tokenEntry struct {
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appID string
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token string
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expiresAt time.Time
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}
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var (
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tokenMu sync.Mutex
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tokenCache tokenEntry
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tokenMinTTL = 5 * time.Minute
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)
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// GetAccessToken 获取小程序 access_token（内存缓存，提前 5 分钟刷新）
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func GetAccessToken(cfg *Config) (string, error) { return getAccessToken(cfg) }
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func getAccessToken(cfg *Config) (string, error) {
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tokenMu.Lock()
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if tokenCache.appID == cfg.AppID && tokenCache.token != "" && time.Now().Before(tokenCache.expiresAt) {
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t := tokenCache.token
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tokenMu.Unlock()
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return t, nil
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}
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tokenMu.Unlock()
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api := fmt.Sprintf("%s/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s",
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apiBase, url.QueryEscape(cfg.AppID), url.QueryEscape(cfg.AppSecret))
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var resp struct {
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AccessToken string `json:"access_token"`
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ExpiresIn int `json:"expires_in"`
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ErrCode int `json:"errcode"`
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ErrMsg string `json:"errmsg"`
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}
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if err := httpGetJSON(api, &resp); err != nil {
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return "", err
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}
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if resp.AccessToken == "" {
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return "", &APIError{API: "获取 access_token", Code: resp.ErrCode, Msg: resp.ErrMsg}
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}
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ttl := time.Duration(resp.ExpiresIn) * time.Second
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if ttl <= tokenMinTTL {
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ttl = time.Hour
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}
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tokenMu.Lock()
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tokenCache = tokenEntry{appID: cfg.AppID, token: resp.AccessToken, expiresAt: time.Now().Add(ttl - tokenMinTTL)}
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tokenMu.Unlock()
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return resp.AccessToken, nil
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}
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// ============================ HTTP 辅助 ============================
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func httpGetJSON(api string, out interface{}) error {
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resp, err := httpClient.Get(api)
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if err != nil {
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return fmt.Errorf("请求微信接口失败: %w", err)
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}
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defer resp.Body.Close()
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return fmt.Errorf("读取微信响应失败: %w", err)
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}
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if err := json.Unmarshal(body, out); err != nil {
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return fmt.Errorf("解析微信响应失败: %w（body: %s）", err, truncate(string(body), 200))
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}
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return nil
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}
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func httpPostJSON(api string, payload interface{}, out interface{}) error {
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bs, err := json.Marshal(payload)
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if err != nil {
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return err
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}
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resp, err := httpClient.Post(api, "application/json; charset=utf-8", bytes.NewReader(bs))
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if err != nil {
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return fmt.Errorf("请求微信接口失败: %w", err)
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}
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defer resp.Body.Close()
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return fmt.Errorf("读取微信响应失败: %w", err)
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}
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if err := json.Unmarshal(body, out); err != nil {
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return fmt.Errorf("解析微信响应失败: %w（body: %s）", err, truncate(string(body), 200))
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}
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return nil
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}
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func truncate(s string, n int) string {
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if len(s) <= n {
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return s
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}
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return s[:n] + "..."
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}
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@@ -0,0 +1,126 @@
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// Package wechatmini 微信小程序服务端能力：配置、code 换 openid、手机号快速验证。
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//
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// 与 services/wechatmp（公众号）分开：小程序走 sns/jscode2session 与
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// wxa/business/getuserphonenumber，两者的 AppID / AppSecret 互不相通。
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package wechatmini
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import (
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"errors"
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"strings"
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"time"
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"github.com/beego/beego/v2/client/orm"
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"server/models"
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"server/services/wechatmp"
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)
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// Config 小程序运行配置（敏感字段已解密）
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type Config struct {
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ID uint64
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AppID string
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AppSecret string // 明文
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Enabled bool
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AutoBind bool
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Remark string
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}
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// ErrNotConfigured 未配置或未启用
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var ErrNotConfigured = errors.New("微信小程序未配置或未启用")
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// LoadConfig 读取小程序配置（单行，敏感字段解密）；未配置返回 ErrNotConfigured
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func LoadConfig() (*Config, error) {
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var row models.WechatMiniConfig
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err := models.Orm.QueryTable(new(models.WechatMiniConfig)).OrderBy("id").One(&row)
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if err != nil {
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if err == orm.ErrNoRows {
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return nil, ErrNotConfigured
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}
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return nil, err
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}
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cfg := &Config{
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ID: row.ID,
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AppID: strings.TrimSpace(row.AppID),
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Enabled: row.Enabled == 1,
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AutoBind: row.AutoBind != 0,
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Remark: row.Remark,
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}
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if row.AppSecret != "" {
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plain, derr := wechatmp.DecryptSecret(row.AppSecret)
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if derr != nil {
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return nil, derr
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}
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cfg.AppSecret = plain
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}
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return cfg, nil
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}
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// LoadEnabledConfig 读取并校验启用状态
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func LoadEnabledConfig() (*Config, error) {
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cfg, err := LoadConfig()
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if err != nil {
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return nil, err
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}
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if !cfg.Enabled || cfg.AppID == "" || cfg.AppSecret == "" {
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return nil, ErrNotConfigured
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}
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return cfg, nil
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}
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// SaveInput 保存配置入参（AppSecret 支持掩码表示不修改）
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type SaveInput struct {
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AppID string
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AppSecret string // 掩码 / 空串 = 保持不变
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Enabled bool
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AutoBind bool
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Remark string
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}
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// SaveConfig 保存小程序配置（不存在则创建）
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func SaveConfig(in SaveInput) error {
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if strings.TrimSpace(in.AppID) == "" {
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return errors.New("AppID 不能为空")
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}
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var row models.WechatMiniConfig
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err := models.Orm.QueryTable(new(models.WechatMiniConfig)).OrderBy("id").One(&row)
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now := time.Now()
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isNew := false
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if err != nil {
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if err != orm.ErrNoRows {
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return err
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}
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isNew = true
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row = models.WechatMiniConfig{}
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}
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secret := strings.TrimSpace(in.AppSecret)
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if secret != "" && !wechatmp.IsMasked(secret) {
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enc, eerr := wechatmp.EncryptSecret(secret)
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if eerr != nil {
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return eerr
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}
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row.AppSecret = enc
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}
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row.AppID = strings.TrimSpace(in.AppID)
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row.Remark = strings.TrimSpace(in.Remark)
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if in.Enabled {
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row.Enabled = 1
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} else {
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row.Enabled = 0
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}
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if in.AutoBind {
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row.AutoBind = 1
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} else {
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row.AutoBind = 0
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}
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row.UpdateTime = &now
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if isNew {
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row.CreateTime = now
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_, err = models.Orm.Insert(&row)
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return err
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}
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_, err = models.Orm.Update(&row)
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return err
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}
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