feat(webdav): support setting download proxy

middleware/auth.go

@@ -116,6 +116,11 @@ func WebDAVAuth() gin.HandlerFunc {
 			return
 		}
 
+		// 用户组已启用WebDAV代理？
+		if !expectedUser.Group.OptionsSerialized.WebDAVProxy {
+			webdav.UseProxy = false
+		}
+
 		c.Set("user", &expectedUser)
 		c.Set("webdav", webdav)
 		c.Next()

models/group.go

@@ -35,6 +35,7 @@ type GroupOption struct {
 	RedirectedSource bool                   `json:"redirected_source,omitempty"`
 	Aria2BatchSize   int                    `json:"aria2_batch,omitempty"`
 	AdvanceDelete    bool                   `json:"advance_delete,omitempty"`
+	WebDAVProxy      bool                   `json:"webdav_proxy,omitempty"`
 }
 
 // GetGroupByID 用ID获取用户组

models/webdav.go

@@ -12,6 +12,7 @@ type Webdav struct {
 	UserID   uint   `gorm:"unique_index:password_only_on"` // 用户ID
 	Root     string `gorm:"type:text"`                     // 根目录
 	Readonly bool   `gorm:"type:bool"`                     // 是否只读
+	UseProxy bool   `gorm:"type:bool"`                     // 是否进行反代
 }
 
 // Create 创建账户
@@ -41,7 +42,7 @@ func DeleteWebDAVAccountByID(id, uid uint) {
 	DB.Where("user_id = ? and id = ?", uid, id).Delete(&Webdav{})
 }
 
-// UpdateWebDAVAccountReadonlyByID 根据账户ID和UID更新账户的只读性
-func UpdateWebDAVAccountReadonlyByID(id, uid uint, readonly bool) {
-	DB.Model(&Webdav{Model: gorm.Model{ID: id}, UserID: uid}).UpdateColumn("readonly", readonly)
+// UpdateWebDAVAccountByID 根据账户ID和UID更新账户
+func UpdateWebDAVAccountByID(id, uid uint, updates map[string]interface{}) {
+	DB.Model(&Webdav{Model: gorm.Model{ID: id}, UserID: uid}).Updates(updates)
 }

pkg/filesystem/fsctx/context.go

@@ -37,4 +37,8 @@ const (
 	SlaveSrcPath
 	// Webdav目标名称
 	WebdavDstName
+	// WebDAVCtx WebDAV
+	WebDAVCtx
+	// WebDAV反代Url
+	WebDAVProxyUrlCtx
 )

pkg/serializer/user.go

@@ -42,6 +42,7 @@ type group struct {
 	WebDAVEnabled        bool   `json:"webdav"`
 	SourceBatchSize      int    `json:"sourceBatch"`
 	AdvanceDelete        bool   `json:"advanceDelete"`
+	AllowWebDAVProxy     bool   `json:"allowWebDAVProxy"`
 }
 
 type tag struct {
@@ -100,6 +101,7 @@ func BuildUser(user model.User) User {
 			ShareDownload:        user.Group.OptionsSerialized.ShareDownload,
 			CompressEnabled:      user.Group.OptionsSerialized.ArchiveTask,
 			WebDAVEnabled:        user.Group.WebDAVEnabled,
+			AllowWebDAVProxy:     user.Group.OptionsSerialized.WebDAVProxy,
 			SourceBatchSize:      user.Group.OptionsSerialized.SourceBatchSize,
 			AdvanceDelete:        user.Group.OptionsSerialized.AdvanceDelete,
 		},

pkg/webdav/webdav.go

@@ -10,6 +10,7 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
+	"net/http/httputil"
 	"net/url"
 	"path"
 	"strconv"
@@ -241,6 +242,23 @@ func (h *Handler) handleOptions(w http.ResponseWriter, r *http.Request, fs *file
 	return 0, nil
 }
 
+var proxy = &httputil.ReverseProxy{
+	Director: func(request *http.Request) {
+		if target, ok := request.Context().Value(fsctx.WebDAVProxyUrlCtx).(*url.URL); ok {
+			request.URL.Scheme = target.Scheme
+			request.URL.Host = target.Host
+			request.URL.Path = target.Path
+			request.URL.RawPath = target.RawPath
+			request.URL.RawQuery = target.RawQuery
+			request.Host = target.Host
+			request.Header.Del("Authorization")
+		}
+	},
+	ErrorHandler: func(writer http.ResponseWriter, request *http.Request, err error) {
+		writer.WriteHeader(http.StatusInternalServerError)
+	},
+}
+
 // OK
 func (h *Handler) handleGetHeadPost(w http.ResponseWriter, r *http.Request, fs *filesystem.FileSystem) (status int, err error) {
 	defer fs.Recycle()
@@ -279,7 +297,23 @@ func (h *Handler) handleGetHeadPost(w http.ResponseWriter, r *http.Request, fs *
 		return 0, nil
 	}
 
-	http.Redirect(w, r, rs.URL, 301)
+	if application, ok := r.Context().Value(fsctx.WebDAVCtx).(*model.Webdav); ok && application.UseProxy {
+		target, err := url.Parse(rs.URL)
+		if err != nil {
+			return http.StatusInternalServerError, err
+		}
+
+		r = r.Clone(context.WithValue(r.Context(), fsctx.WebDAVProxyUrlCtx, target))
+		// 忽略反向代理在传输错误时报错
+		defer func() {
+			if err := recover(); err != nil && err != http.ErrAbortHandler {
+				panic(err)
+			}
+		}()
+		proxy.ServeHTTP(w, r)
+	} else {
+		http.Redirect(w, r, rs.URL, 301)
+	}
 
 	return 0, nil
 }

routers/controllers/webdav.go

@@ -1,8 +1,10 @@
 package controllers
 
 import (
+	"context"
 	model "github.com/cloudreve/Cloudreve/v3/models"
 	"github.com/cloudreve/Cloudreve/v3/pkg/filesystem"
+	"github.com/cloudreve/Cloudreve/v3/pkg/filesystem/fsctx"
 	"github.com/cloudreve/Cloudreve/v3/pkg/util"
 	"github.com/cloudreve/Cloudreve/v3/pkg/webdav"
 	"github.com/cloudreve/Cloudreve/v3/service/setting"
@@ -49,6 +51,9 @@ func ServeWebDAV(c *gin.Context) {
 				return
 			}
 		}
+
+		// 更新Context
+		c.Request = c.Request.WithContext(context.WithValue(c.Request.Context(), fsctx.WebDAVCtx, application))
 	}
 
 	handler.ServeHTTP(c.Writer, c.Request, fs)
@@ -76,9 +81,9 @@ func DeleteWebDAVAccounts(c *gin.Context) {
 	}
 }
 
-// UpdateWebDAVAccountsReadonly 更改WebDAV账户只读性
-func UpdateWebDAVAccountsReadonly(c *gin.Context) {
-	var service setting.WebDAVAccountUpdateReadonlyService
+// UpdateWebDAVAccounts 更改WebDAV账户只读性和是否使用代理服务
+func UpdateWebDAVAccounts(c *gin.Context) {
+	var service setting.WebDAVAccountUpdateService
 	if err := c.ShouldBindJSON(&service); err == nil {
 		res := service.Update(c, CurrentUser(c))
 		c.JSON(200, res)

routers/router.go

@@ -721,8 +721,8 @@ func InitMasterRouter() *gin.Engine {
 				webdav.POST("accounts", controllers.CreateWebDAVAccounts)
 				// 删除账号
 				webdav.DELETE("accounts/:id", controllers.DeleteWebDAVAccounts)
-				// 更新账号可读性
-				webdav.PATCH("accounts", controllers.UpdateWebDAVAccountsReadonly)
+				// 更新账号可读性和是否使用代理服务
+				webdav.PATCH("accounts", controllers.UpdateWebDAVAccounts)
 			}
 
 		}

service/setting/webdav.go

@@ -22,10 +22,11 @@ type WebDAVAccountCreateService struct {
 	Name string `json:"name" binding:"required,min=1,max=255"`
 }
 
-// WebDAVAccountUpdateReadonlyService WebDAV 修改只读性服务
-type WebDAVAccountUpdateReadonlyService struct {
-	ID       uint `json:"id" binding:"required,min=1"`
-	Readonly bool `json:"readonly"`
+// WebDAVAccountUpdateService WebDAV 修改只读性和是否使用代理服务
+type WebDAVAccountUpdateService struct {
+	ID       uint  `json:"id" binding:"required,min=1"`
+	Readonly *bool `json:"readonly" binding:"required_without=UseProxy"`
+	UseProxy *bool `json:"use_proxy" binding:"required_without=Readonly"`
 }
 
 // WebDAVMountCreateService WebDAV 挂载创建服务
@@ -62,12 +63,17 @@ func (service *WebDAVAccountService) Delete(c *gin.Context, user *model.User) se
 	return serializer.Response{}
 }
 
-// Update 修改WebDAV账户的只读性
-func (service *WebDAVAccountUpdateReadonlyService) Update(c *gin.Context, user *model.User) serializer.Response {
-	model.UpdateWebDAVAccountReadonlyByID(service.ID, user.ID, service.Readonly)
-	return serializer.Response{Data: map[string]bool{
-		"readonly": service.Readonly,
-	}}
+// Update 修改WebDAV账户只读性和是否使用代理服务
+func (service *WebDAVAccountUpdateService) Update(c *gin.Context, user *model.User) serializer.Response {
+	var updates = make(map[string]interface{})
+	if service.Readonly != nil {
+		updates["readonly"] = *service.Readonly
+	}
+	if service.UseProxy != nil {
+		updates["use_proxy"] = *service.UseProxy
+	}
+	model.UpdateWebDAVAccountByID(service.ID, user.ID, updates)
+	return serializer.Response{Data: updates}
 }
 
 // Accounts 列出WebDAV账号