feat: file proxy handle

internal/fs/copy.go

@@ -85,7 +85,7 @@ func copyFileBetween2Accounts(tsk *task.Task[uint64], srcAccount, dstAccount dri
 	if err != nil {
 		return errors.WithMessagef(err, "failed get src [%s] file", srcFilePath)
 	}
-	link, err := operations.Link(tsk.Ctx, srcAccount, srcFilePath, model.LinkArgs{})
+	link, _, err := operations.Link(tsk.Ctx, srcAccount, srcFilePath, model.LinkArgs{})
 	if err != nil {
 		return errors.WithMessagef(err, "failed get [%s] link", srcFilePath)
 	}

internal/fs/fs.go

@@ -30,13 +30,13 @@ func Get(ctx context.Context, path string) (model.Obj, error) {
 	return res, nil
 }
 
-func Link(ctx context.Context, path string, args model.LinkArgs) (*model.Link, error) {
+func Link(ctx context.Context, path string, args model.LinkArgs) (*model.Link, model.Obj, error) {
-	res, err := link(ctx, path, args)
+	res, file, err := link(ctx, path, args)
 	if err != nil {
 		log.Errorf("failed link %s: %+v", path, err)
-		return nil, err
+		return nil, nil, err
 	}
-	return res, nil
+	return res, file, nil
 }
 
 func MakeDir(ctx context.Context, path string) error {

internal/fs/link.go

@@ -7,10 +7,10 @@ import (
 	"github.com/pkg/errors"
 )
 
-func link(ctx context.Context, path string, args model.LinkArgs) (*model.Link, error) {
+func link(ctx context.Context, path string, args model.LinkArgs) (*model.Link, model.Obj, error) {
 	account, actualPath, err := operations.GetAccountAndActualPath(path)
 	if err != nil {
-		return nil, errors.WithMessage(err, "failed get account")
+		return nil, nil, errors.WithMessage(err, "failed get account")
 	}
 	return operations.Link(ctx, account, actualPath, args)
 }

internal/operations/fs.go

@@ -115,19 +115,19 @@ var linkCache = cache.NewMemCache(cache.WithShards[*model.Link](16))
 var linkG singleflight.Group[*model.Link]
 
 // Link get link, if is an url. should have an expiry time
-func Link(ctx context.Context, account driver.Driver, path string, args model.LinkArgs) (*model.Link, error) {
+func Link(ctx context.Context, account driver.Driver, path string, args model.LinkArgs) (*model.Link, model.Obj, error) {
+	file, err := Get(ctx, account, path)
+	if err != nil {
+		return nil, nil, errors.WithMessage(err, "failed to get file")
+	}
+	if file.IsDir() {
+		return nil, nil, errors.WithStack(errs.NotFile)
+	}
 	key := stdpath.Join(account.GetAccount().VirtualPath, path)
 	if link, ok := linkCache.Get(key); ok {
-		return link, nil
+		return link, file, nil
 	}
 	fn := func() (*model.Link, error) {
-		file, err := Get(ctx, account, path)
-		if err != nil {
-			return nil, errors.WithMessage(err, "failed to get file")
-		}
-		if file.IsDir() {
-			return nil, errors.WithStack(errs.NotFile)
-		}
 		link, err := account.Link(ctx, file, args)
 		if err != nil {
 			return nil, errors.WithMessage(err, "failed get link")
@@ -138,7 +138,7 @@ func Link(ctx context.Context, account driver.Driver, path string, args model.Li
 		return link, nil
 	}
 	link, err, _ := linkG.Do(key, fn)
-	return link, err
+	return link, file, err
 }
 
 func MakeDir(ctx context.Context, account driver.Driver, path string) error {

internal/sign/sign.go

@@ -10,6 +10,15 @@ import (
 var once sync.Once
 var instance sign.Sign
 
+func Sign(data string) string {
+	expire := setting.GetIntSetting("link_expiration", 0)
+	if expire == 0 {
+		return NotExpired(data)
+	} else {
+		return WithDuration(data, time.Duration(expire)*time.Hour)
+	}
+}
+
 func WithDuration(data string, d time.Duration) string {
 	once.Do(Instance)
 	return instance.Sign(data, time.Now().Add(d).Unix())

server/common/sign.go

@@ -0,0 +1,13 @@
+package common
+
+import (
+	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/internal/sign"
+)
+
+func Sign(obj model.Obj) string {
+	if obj.IsDir() {
+		return ""
+	}
+	return sign.Sign(obj.GetName())
+}

server/controllers/down.go

@@ -1,66 +1,33 @@
 package controllers
 
 import (
+	"fmt"
+	"github.com/alist-org/alist/v3/internal/sign"
 	stdpath "path"
 	"strings"
 
-	"github.com/alist-org/alist/v3/internal/db"
 	"github.com/alist-org/alist/v3/internal/driver"
-	"github.com/alist-org/alist/v3/internal/errs"
 	"github.com/alist-org/alist/v3/internal/fs"
 	"github.com/alist-org/alist/v3/internal/model"
 	"github.com/alist-org/alist/v3/internal/setting"
-	"github.com/alist-org/alist/v3/internal/sign"
 	"github.com/alist-org/alist/v3/pkg/utils"
 	"github.com/alist-org/alist/v3/server/common"
 	"github.com/gin-gonic/gin"
-	"github.com/pkg/errors"
 )
 
 func Down(c *gin.Context) {
-	rawPath := parsePath(c.Param("path"))
+	rawPath := c.MustGet("path").(string)
 	filename := stdpath.Base(rawPath)
-	meta, err := db.GetNearestMeta(rawPath)
-	if err != nil {
-		if !errors.Is(errors.Cause(err), errs.MetaNotFound) {
-			common.ErrorResp(c, err, 500, true)
-			return
-		}
-	}
-	// verify sign
-	if needSign(meta, rawPath) {
-		s := c.Param("sign")
-		err = sign.Verify(filename, s)
-		if err != nil {
-			common.ErrorResp(c, err, 401)
-			return
-		}
-	}
 	account, err := fs.GetAccount(rawPath)
 	if err != nil {
 		common.ErrorResp(c, err, 500)
 		return
 	}
-	if needProxy(account, filename) {
+	if shouldProxy(account, filename) {
-		link, err := fs.Link(c, rawPath, model.LinkArgs{
+		Proxy(c)
-			Header: c.Request.Header,
+		return
-		})
-		if err != nil {
-			common.ErrorResp(c, err, 500)
-			return
-		}
-		obj, err := fs.Get(c, rawPath)
-		if err != nil {
-			common.ErrorResp(c, err, 500)
-			return
-		}
-		err = common.Proxy(c.Writer, c.Request, link, obj)
-		if err != nil {
-			common.ErrorResp(c, err, 500, true)
-			return
-		}
 	} else {
-		link, err := fs.Link(c, rawPath, model.LinkArgs{
+		link, _, err := fs.Link(c, rawPath, model.LinkArgs{
 			IP:     c.ClientIP(),
 			Header: c.Request.Header,
 		})
@@ -72,25 +39,49 @@ func Down(c *gin.Context) {
 	}
 }
 
-// TODO: implement
+func Proxy(c *gin.Context) {
-// path maybe contains # ? etc.
+	rawPath := c.MustGet("path").(string)
-func parsePath(path string) string {
+	filename := stdpath.Base(rawPath)
-	return utils.StandardizePath(path)
+	account, err := fs.GetAccount(rawPath)
+	if err != nil {
+		common.ErrorResp(c, err, 500)
+		return
+	}
+	if canProxy(account, filename) {
+		downProxyUrl := account.GetAccount().DownProxyUrl
+		if downProxyUrl != "" {
+			_, ok := c.GetQuery("d")
+			if ok {
+				URL := fmt.Sprintf("%s%s?sign=%s", strings.Split(downProxyUrl, "\n")[0], rawPath, sign.Sign(filename))
+				c.Redirect(302, URL)
+				return
+			}
+		}
+		link, file, err := fs.Link(c, rawPath, model.LinkArgs{
+			Header: c.Request.Header,
+		})
+		if err != nil {
+			common.ErrorResp(c, err, 500)
+			return
+		}
+		err = common.Proxy(c.Writer, c.Request, link, file)
+		if err != nil {
+			common.ErrorResp(c, err, 500, true)
+			return
+		}
+	} else {
+		common.ErrorStrResp(c, "proxy not allowed", 403)
+		return
+	}
 }
 
-func needSign(meta *model.Meta, path string) bool {
+// TODO need optimize
-	if meta == nil || meta.Password == "" {
+// when should be proxy?
-		return false
+// 1. config.MustProxy()
-	}
+// 2. account.WebProxy
-	if !meta.SubFolder && path != meta.Path {
+// 3. proxy_types
-		return false
+func shouldProxy(account driver.Driver, filename string) bool {
-	}
+	if account.Config().MustProxy() || account.GetAccount().WebProxy {
-	return true
-}
-
-func needProxy(account driver.Driver, filename string) bool {
-	config := account.Config()
-	if config.MustProxy() {
 		return true
 	}
 	proxyTypes := setting.GetByKey("proxy_types")
@@ -99,3 +90,25 @@ func needProxy(account driver.Driver, filename string) bool {
 	}
 	return false
 }
+
+// TODO need optimize
+// when can be proxy?
+// 1. text file
+// 2. config.MustProxy()
+// 3. account.WebProxy
+// 4. proxy_types
+// solution: text_file + shouldProxy()
+func canProxy(account driver.Driver, filename string) bool {
+	if account.Config().MustProxy() || account.GetAccount().WebProxy {
+		return true
+	}
+	proxyTypes := setting.GetByKey("proxy_types")
+	if strings.Contains(proxyTypes, utils.Ext(filename)) {
+		return true
+	}
+	textTypes := setting.GetByKey("text_types")
+	if strings.Contains(textTypes, utils.Ext(filename)) {
+		return true
+	}
+	return false
+}

server/controllers/fsget.go

@@ -53,7 +53,7 @@ func FsGet(c *gin.Context) {
 			Size:     obj.GetSize(),
 			IsDir:    obj.IsDir(),
 			Modified: obj.ModTime(),
-			Sign:     Sign(obj),
+			Sign:     common.Sign(obj),
 		},
 		// TODO: set raw url
 	})

server/controllers/fslist.go

@@ -9,7 +9,6 @@ import (
 	"github.com/alist-org/alist/v3/internal/fs"
 	"github.com/alist-org/alist/v3/internal/model"
 	"github.com/alist-org/alist/v3/internal/setting"
-	"github.com/alist-org/alist/v3/internal/sign"
 	"github.com/alist-org/alist/v3/pkg/utils"
 	"github.com/alist-org/alist/v3/server/common"
 	"github.com/gin-gonic/gin"
@@ -108,20 +107,8 @@ func toObjResp(objs []model.Obj, path string, baseURL string) []ObjResp {
 			Size:     obj.GetSize(),
 			IsDir:    obj.IsDir(),
 			Modified: obj.ModTime(),
-			Sign:     Sign(obj),
+			Sign:     common.Sign(obj),
 		})
 	}
 	return resp
 }
-
-func Sign(obj model.Obj) string {
-	if obj.IsDir() {
-		return ""
-	}
-	expire := setting.GetIntSetting("link_expiration", 0)
-	if expire == 0 {
-		return sign.NotExpired(obj.GetName())
-	} else {
-		return sign.WithDuration(obj.GetName(), time.Duration(expire)*time.Hour)
-	}
-}

server/middlewares/down.go

@@ -0,0 +1,54 @@
+package middlewares
+
+import (
+	"github.com/alist-org/alist/v3/internal/db"
+	"github.com/alist-org/alist/v3/internal/errs"
+	"github.com/alist-org/alist/v3/internal/model"
+	"github.com/alist-org/alist/v3/internal/sign"
+	"github.com/alist-org/alist/v3/pkg/utils"
+	"github.com/alist-org/alist/v3/server/common"
+	"github.com/gin-gonic/gin"
+	"github.com/pkg/errors"
+	stdpath "path"
+)
+
+func Down(c *gin.Context) {
+	rawPath := parsePath(c.Param("path"))
+	c.Set("path", rawPath)
+	filename := stdpath.Base(rawPath)
+	meta, err := db.GetNearestMeta(rawPath)
+	if err != nil {
+		if !errors.Is(errors.Cause(err), errs.MetaNotFound) {
+			common.ErrorResp(c, err, 500, true)
+			return
+		}
+	}
+	c.Set("meta", meta)
+	// verify sign
+	if needSign(meta, rawPath) {
+		s := c.Param("sign")
+		err = sign.Verify(filename, s)
+		if err != nil {
+			common.ErrorResp(c, err, 401)
+			c.Abort()
+			return
+		}
+	}
+	c.Next()
+}
+
+// TODO: implement
+// path maybe contains # ? etc.
+func parsePath(path string) string {
+	return utils.StandardizePath(path)
+}
+
+func needSign(meta *model.Meta, path string) bool {
+	if meta == nil || meta.Password == "" {
+		return false
+	}
+	if !meta.SubFolder && path != meta.Path {
+		return false
+	}
+	return true
+}

server/router.go

@@ -13,7 +13,8 @@ func Init(r *gin.Engine) {
 	common.SecretKey = []byte(conf.Conf.JwtSecret)
 	Cors(r)
 
-	r.GET("/d/*path", controllers.Down)
+	r.GET("/d/*path", middlewares.Down, controllers.Down)
+	r.GET("/p/*path", middlewares.Down, controllers.Proxy)
 
 	api := r.Group("/api", middlewares.Auth)
 	api.POST("/auth/login", controllers.Login)