package middleware import ( "github.com/gin-gonic/gin" "miniapp/config" "miniapp/global" "net/http" ) // Cors 直接放行所有跨域请求并放行所有 OPTIONS 方法 func Cors() gin.HandlerFunc { return func(c *gin.Context) { method := c.Request.Method origin := c.Request.Header.Get("Origin") c.Header("Access-Control-Allow-Origin", origin) c.Header("Access-Control-Allow-Headers", "Content-Type,AccessToken,X-CSRF-Token, Authorization, Token,X-Token,X-User-Id") c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS,DELETE,PUT") c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Content-Type, New-Token, New-Expires-At") c.Header("Access-Control-Allow-Credentials", "true") // 放行所有OPTIONS方法 if method == "OPTIONS" { c.AbortWithStatus(http.StatusNoContent) } // 处理请求 c.Next() } } // CorsByRules 按照配置处理跨域请求 func CorsByRules() gin.HandlerFunc { // 放行全部 if global.GVA_CONFIG.Cors.Mode == "allow-all" { return Cors() } return func(c *gin.Context) { whitelist := checkCors(c.GetHeader("origin")) // 通过检查, 添加请求头 if whitelist != nil { c.Header("Access-Control-Allow-Origin", whitelist.AllowOrigin) c.Header("Access-Control-Allow-Headers", whitelist.AllowHeaders) c.Header("Access-Control-Allow-Methods", whitelist.AllowMethods) c.Header("Access-Control-Expose-Headers", whitelist.ExposeHeaders) if whitelist.AllowCredentials { c.Header("Access-Control-Allow-Credentials", "true") } } // 严格白名单模式且未通过检查,直接拒绝处理请求 if whitelist == nil && global.GVA_CONFIG.Cors.Mode == "strict-whitelist" && !(c.Request.Method == "GET" && c.Request.URL.Path == "/health") { c.AbortWithStatus(http.StatusForbidden) } else { // 非严格白名单模式,无论是否通过检查均放行所有 OPTIONS 方法 if c.Request.Method == http.MethodOptions { c.AbortWithStatus(http.StatusNoContent) } } // 处理请求 c.Next() } } func checkCors(currentOrigin string) *config.CORSWhitelist { for _, whitelist := range global.GVA_CONFIG.Cors.Whitelist { // 遍历配置中的跨域头,寻找匹配项 if currentOrigin == whitelist.AllowOrigin { return &whitelist } } return nil }