chore: release v1.0.40

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/internal/handler/public.go

@@ -3,13 +3,16 @@ package handler
 import (
 	"errors"
 	"fmt"
+	"html"
 	"net/http"
+	"os"
 	"strconv"
 	"strings"
 
 	"github.com/gin-gonic/gin"
 	"gorm.io/gorm"
 
+	"github.com/wangjia/jiu/backend/config"
 	"github.com/wangjia/jiu/backend/internal/model"
 )
 
@@ -274,3 +277,91 @@ func (h *PublicHandler) ListShopProducts(c *gin.Context) {
 		"page_size": pageSize,
 	})
 }
+
+// ProductPage GET /product/:public_id
+// 返回注入了基础 Open Graph 标签的 Flutter index.html，供微信/飞书等社交平台爬虫生成分享卡片。
+// 找不到商品时原样返回 index.html，让 Flutter 自行展示"商品不存在"；爬虫拿不到 OG 标签但页面不报错。
+func (h *PublicHandler) ProductPage(c *gin.Context) {
+	publicID := c.Param("public_id")
+
+	// 读取 Flutter 构建产物 index.html
+	idxPath := config.C.Storage.WebDir + "/index.html"
+	idxBytes, err := os.ReadFile(idxPath)
+	if err != nil {
+		c.String(http.StatusInternalServerError, "index.html not found: %s", idxPath)
+		return
+	}
+	idxHTML := string(idxBytes)
+
+	// 查商品（只取 OG 所需字段，轻量查询）
+	var product model.Product
+	if err := h.db.Select("id, public_id, name, brand, series, spec, shop_id").
+		Where("public_id = ? AND deleted_at IS NULL", publicID).
+		Preload("Images").
+		First(&product).Error; err != nil {
+		// 查不到商品：原样返回 index.html，让 Flutter 展示"商品不存在"
+		c.Data(http.StatusOK, "text/html; charset=utf-8", idxBytes)
+		return
+	}
+
+	// 查门店名
+	var shop model.Shop
+	shopName := ""
+	if err := h.db.Select("name").Where("id = ?", product.ShopID).First(&shop).Error; err == nil {
+		shopName = shop.Name
+	}
+
+	// 构造 OG 标签并注入 </head> 前
+	ogTags := buildProductOG(product, shopName, config.C.Storage.PublicURL)
+	out := strings.Replace(idxHTML, "</head>", ogTags+"</head>", 1)
+	c.Data(http.StatusOK, "text/html; charset=utf-8", []byte(out))
+}
+
+// buildProductOG 构造基础 Open Graph meta 标签字符串。
+// 所有值经 html.EscapeString 转义，防止 XSS 或破坏 HTML 结构。
+// 无图片时不输出 og:image 行。
+func buildProductOG(product model.Product, shopName, publicURL string) string {
+	// og:title：品牌 + 商品名（品牌已含在名字中时不重复）+ 系列
+	title := product.Name
+	if product.Brand != "" && !strings.Contains(product.Name, product.Brand) {
+		title = product.Brand + title
+	}
+	if product.Series != "" {
+		title = title + "（" + product.Series + "）"
+	}
+
+	// og:description：规格（度数/香型/容量）| 门店名正品 · 扫码验真
+	desc := product.Spec
+	suffix := "正品 · 扫码验真"
+	if shopName != "" {
+		suffix = shopName + suffix
+	}
+	if desc != "" {
+		desc = desc + " | " + suffix
+	} else {
+		desc = suffix
+	}
+
+	// og:site_name
+	siteName := "岩美酒库"
+	if shopName != "" {
+		siteName = shopName + " · " + siteName
+	}
+
+	// og:url
+	pageURL := publicURL + "/product/" + product.PublicID
+
+	var sb strings.Builder
+	sb.WriteString("\n")
+	sb.WriteString(`  <meta property="og:type" content="website">` + "\n")
+	sb.WriteString(`  <meta property="og:site_name" content="` + html.EscapeString(siteName) + `">` + "\n")
+	sb.WriteString(`  <meta property="og:url" content="` + html.EscapeString(pageURL) + `">` + "\n")
+	sb.WriteString(`  <meta property="og:title" content="` + html.EscapeString(title) + `">` + "\n")
+	sb.WriteString(`  <meta property="og:description" content="` + html.EscapeString(desc) + `">` + "\n")
+	// og:image：仅有图片时输出
+	if len(product.Images) > 0 && product.Images[0].URL != "" {
+		imgURL := publicURL + product.Images[0].URL
+		sb.WriteString(`  <meta property="og:image" content="` + html.EscapeString(imgURL) + `">` + "\n")
+	}
+	return sb.String()
+}