perf: Speed ​​of database initialization (#7694)

* perf: 优化非sqlite3数据库时初始化慢的问题

* refactor

server/common/base.go

@@ -12,16 +12,16 @@ import (
 func GetApiUrl(r *http.Request) string {
 	api := conf.Conf.SiteURL
 	if strings.HasPrefix(api, "http") {
-		return api
+		return strings.TrimSuffix(api, "/")
 	}
 	if r != nil {
 		protocol := "http"
 		if r.TLS != nil || r.Header.Get("X-Forwarded-Proto") == "https" {
 			protocol = "https"
 		}
-		host := r.Host
-		if r.Header.Get("X-Forwarded-Host") != "" {
-			host = r.Header.Get("X-Forwarded-Host")
+		host := r.Header.Get("X-Forwarded-Host")
+		if host == "" {
+			host = r.Host
 		}
 		api = fmt.Sprintf("%s://%s", protocol, stdpath.Join(host, api))
 	}