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core/server/middleware/page_auth.go
2026-03-14 19:36:33 +00:00

97 lines
2.5 KiB
Go

package middleware
import (
"net/http"
"net/url"
"strings"
"github.com/gin-gonic/gin"
"git.gobha.me/xcaliber/chat-switchboard/config"
"git.gobha.me/xcaliber/chat-switchboard/database"
"git.gobha.me/xcaliber/chat-switchboard/store"
)
// AuthOrRedirect validates JWT tokens for page routes.
// Unlike Auth() which returns 401 JSON for API calls, this redirects
// to the login page — appropriate for browser navigation.
//
// Token is read from the "sb_token" cookie (set by the login page JS)
// since page requests don't have Authorization headers.
func AuthOrRedirect(cfg *config.Config, users store.UserStore, cache *UserStatusCache) gin.HandlerFunc {
loginPath := cfg.BasePath + "/login"
return func(c *gin.Context) {
// Skip auth when running without a database (unmanaged mode)
if !database.IsConnected() {
c.Next()
return
}
// Try cookie first (set by login page), then Authorization header,
// then query param (for edge cases)
tokenString := ""
if cookie, err := c.Cookie("sb_token"); err == nil && cookie != "" {
tokenString = cookie
}
if tokenString == "" {
header := c.GetHeader("Authorization")
if strings.HasPrefix(header, "Bearer ") {
tokenString = strings.TrimPrefix(header, "Bearer ")
}
}
if tokenString == "" {
tokenString = c.Query("token")
}
if tokenString == "" {
redirectToLogin(c, loginPath)
return
}
claims, ok := parseAndValidateJWT(tokenString, cfg.JWTSecret)
if !ok {
redirectToLogin(c, loginPath)
return
}
// Verify user is active and resolve current role from DB
role, valid := verifyUser(c, claims, users, cache)
if !valid {
// verifyUser sent a JSON error, but for page routes we want a redirect.
// The abort already happened, so just return.
return
}
c.Set("user_id", claims.UserID)
c.Set("email", claims.Email)
c.Set("role", role)
c.Next()
}
}
// RequireAdminPage aborts with 403 if the user isn't an admin.
// Use after AuthOrRedirect for admin-only page routes.
func RequireAdminPage() gin.HandlerFunc {
return func(c *gin.Context) {
role, _ := c.Get("role")
if role != "admin" {
c.String(http.StatusForbidden, "Admin access required")
c.Abort()
return
}
c.Next()
}
}
func redirectToLogin(c *gin.Context, loginPath string) {
// Save intended destination for post-login redirect
intended := c.Request.URL.Path
if c.Request.URL.RawQuery != "" {
intended += "?" + c.Request.URL.RawQuery
}
c.SetCookie("redirect_after_login", url.QueryEscape(intended), 300, "/", "", false, true)
c.Redirect(http.StatusFound, loginPath)
c.Abort()
}