Initial open-source release (MIT): image2api AI gateway

Full Go backend + Vue 3 frontend, OpenAI-compatible API, multi-provider
account pools, billing/admin, Docker one-command deploy with auto HTTPS.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/internal/http/middleware/auth.go

@@ -0,0 +1,70 @@
+package middleware
+
+import (
+	"net/http"
+
+	"backend/internal/service"
+	"github.com/gin-gonic/gin"
+)
+
+const currentUserKey = "current_user"
+const currentSessionKey = "current_session"
+
+func RequireSession(auth *service.AuthService) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		user, session, err := auth.CurrentUserFromRequest(
+			c.Request.Context(),
+			c.GetHeader("Authorization"),
+			readCookie(c, "vivid_session"),
+		)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"detail": "failed to validate session"})
+			c.Abort()
+			return
+		}
+		if user == nil || session == nil {
+			c.JSON(http.StatusUnauthorized, gin.H{"detail": "未登录或会话已过期"})
+			c.Abort()
+			return
+		}
+		c.Set(currentUserKey, user)
+		c.Set(currentSessionKey, session)
+		c.Next()
+	}
+}
+
+func RequireAdminSession(auth *service.AuthService) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		user, session, err := auth.CurrentUserFromRequest(
+			c.Request.Context(),
+			c.GetHeader("Authorization"),
+			readCookie(c, "vivid_session"),
+		)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"detail": "failed to validate session"})
+			c.Abort()
+			return
+		}
+		if user == nil || session == nil {
+			c.JSON(http.StatusUnauthorized, gin.H{"detail": "未登录或会话已过期"})
+			c.Abort()
+			return
+		}
+		if user.Role != "admin" {
+			c.JSON(http.StatusForbidden, gin.H{"detail": "需要管理员权限"})
+			c.Abort()
+			return
+		}
+		c.Set(currentUserKey, user)
+		c.Set(currentSessionKey, session)
+		c.Next()
+	}
+}
+
+func readCookie(c *gin.Context, name string) string {
+	v, err := c.Cookie(name)
+	if err != nil {
+		return ""
+	}
+	return v
+}