feat: optional allow be mounted (close #4218)

drivers/alist_v3/driver.go

@@ -2,13 +2,17 @@ package alist_v3
 
 import (
 	"context"
+	"fmt"
 	"net/http"
 	"path"
 	"strconv"
 	"strings"
 
+	"github.com/alist-org/alist/v3/drivers/base"
+	"github.com/alist-org/alist/v3/internal/conf"
 	"github.com/alist-org/alist/v3/internal/driver"
 	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/pkg/utils"
 	"github.com/alist-org/alist/v3/server/common"
 	"github.com/go-resty/resty/v2"
 )
@@ -32,8 +36,33 @@ func (d *AListV3) Init(ctx context.Context) error {
 	_, err := d.request("/me", http.MethodGet, func(req *resty.Request) {
 		req.SetResult(&resp)
 	})
+	if err != nil {
+		return err
+	}
+	// if the username is not empty and the username is not the same as the current username, then login again
 	if d.Username != "" && d.Username != resp.Data.Username {
-		return d.login()
+		err = d.login()
+		if err != nil {
+			return err
+		}
+	}
+	// re-get the user info
+	_, err = d.request("/me", http.MethodGet, func(req *resty.Request) {
+		req.SetResult(&resp)
+	})
+	if err != nil {
+		return err
+	}
+	if resp.Data.Role == model.GUEST {
+		url := d.Address + "/api/public/settings"
+		res, err := base.RestyClient.R().Get(url)
+		if err != nil {
+			return err
+		}
+		allowMounted := utils.Json.Get(res.Body(), "data", conf.AllowMounted).ToString() == "true"
+		if !allowMounted {
+			return fmt.Errorf("the site does not allow mounted")
+		}
 	}
 	return err
 }