1. 小程序端

2. 视频优化

server/utils/wechat.go

@@ -0,0 +1,59 @@
+package utils
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"os"
+	"time"
+)
+
+type WxSessionResult struct {
+	OpenID     string `json:"openid"`
+	SessionKey string `json:"session_key"`
+	UnionID    string `json:"unionid"`
+	ErrCode    int    `json:"errcode"`
+	ErrMsg     string `json:"errmsg"`
+}
+
+// Code2Session exchanges mini-program login code for openid.
+func Code2Session(code string) (*WxSessionResult, error) {
+	appID := os.Getenv("WECHAT_APP_ID")
+	secret := os.Getenv("WECHAT_APP_SECRET")
+	if appID == "" {
+		appID = "wx67e73fb3c9882dfc"
+	}
+	if secret == "" {
+		return nil, fmt.Errorf("WECHAT_APP_SECRET is not configured")
+	}
+
+	q := url.Values{}
+	q.Set("appid", appID)
+	q.Set("secret", secret)
+	q.Set("js_code", code)
+	q.Set("grant_type", "authorization_code")
+
+	endpoint := "https://api.weixin.qq.com/sns/jscode2session?" + q.Encode()
+	client := &http.Client{Timeout: 10 * time.Second}
+	resp, err := client.Get(endpoint)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	var result WxSessionResult
+	if err := json.Unmarshal(body, &result); err != nil {
+		return nil, err
+	}
+	if result.ErrCode != 0 || result.OpenID == "" {
+		return nil, fmt.Errorf("jscode2session failed: %d %s", result.ErrCode, result.ErrMsg)
+	}
+	return &result, nil
+}