feat: support qbittorrent (close #3087 in #3333)

* feat(qbittorrent): authorization and logging in support

* feat(qbittorrent/client): support `AddFromLink`

* refactor(qbittorrent/client): check authorization when getting a new client

* feat(qbittorrent/client): support `GetInfo`

* test(qbittorrent/client): update test cases

* feat(qbittorrent): init qbittorrent client on bootstrap

* feat(qbittorrent): support setting webui url via gin

* feat(qbittorrent/client): support deleting

* feat(qbittorrent/client): parse `TorrentStatus` enum when unmarshalling json in `GetInfo()`

* feat(qbittorrent/client): support getting files by id

* feat(qbittorrent): support adding qbittorrent tasks via gin

* refactor(qbittorrent/client): return a `Client` interface in `New()` instead of `*client`

* refactor: task handle

* chore: fix typo

* chore: change path

---------

Co-authored-by: Andy Hsu <i@nn.ci>

server/handles/qbittorrent.go

@@ -0,0 +1,69 @@
+package handles
+
+import (
+	"github.com/alist-org/alist/v3/internal/conf"
+	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/internal/op"
+	"github.com/alist-org/alist/v3/internal/qbittorrent"
+	"github.com/alist-org/alist/v3/server/common"
+	"github.com/gin-gonic/gin"
+)
+
+type SetQbittorrentReq struct {
+	Url string `json:"url" form:"url"`
+}
+
+func SetQbittorrent(c *gin.Context) {
+	var req SetQbittorrentReq
+	if err := c.ShouldBind(&req); err != nil {
+		common.ErrorResp(c, err, 400)
+		return
+	}
+	items := []model.SettingItem{
+		{Key: conf.QbittorrentUrl, Value: req.Url, Type: conf.TypeString, Group: model.QBITTORRENT, Flag: model.PRIVATE},
+	}
+	if err := op.SaveSettingItems(items); err != nil {
+		common.ErrorResp(c, err, 500)
+		return
+	}
+	if err := qbittorrent.InitClient(); err != nil {
+		common.ErrorResp(c, err, 500)
+		return
+	}
+	common.SuccessResp(c, "ok")
+}
+
+type AddQbittorrentReq struct {
+	Urls []string `json:"urls"`
+	Path string   `json:"path"`
+}
+
+func AddQbittorrent(c *gin.Context) {
+	user := c.MustGet("user").(*model.User)
+	if !user.CanAddQbittorrentTasks() {
+		common.ErrorStrResp(c, "permission denied", 403)
+		return
+	}
+	if !qbittorrent.IsQbittorrentReady() {
+		common.ErrorStrResp(c, "qbittorrent not ready", 500)
+		return
+	}
+	var req AddQbittorrentReq
+	if err := c.ShouldBind(&req); err != nil {
+		common.ErrorResp(c, err, 400)
+		return
+	}
+	reqPath, err := user.JoinPath(req.Path)
+	if err != nil {
+		common.ErrorResp(c, err, 403)
+		return
+	}
+	for _, url := range req.Urls {
+		err := qbittorrent.AddURL(c, url, reqPath)
+		if err != nil {
+			common.ErrorResp(c, err, 500)
+			return
+		}
+	}
+	common.SuccessResp(c)
+}