feat(storage policy): set deny/allow list for file extension and custom regexp （#2695）

inventory/types/types.go

@@ -41,6 +41,12 @@ type (
 		Token string `json:"token"`
 		// 允许的文件扩展名
 		FileType []string `json:"file_type"`
+		// IsFileTypeDenyList Whether above list is a deny list.
+		IsFileTypeDenyList bool `json:"is_file_type_deny_list,omitempty"`
+		// FileRegexp 文件扩展名正则表达式
+		NameRegexp string `json:"file_regexp,omitempty"`
+		// IsNameRegexp Whether above regexp is a deny list.
+		IsNameRegexpDenyList bool `json:"is_name_regexp_deny_list,omitempty"`
 		// OauthRedirect Oauth 重定向地址
 		OauthRedirect string `json:"od_redirect,omitempty"`
 		// CustomProxy whether to use custom-proxy to get file content

pkg/filemanager/fs/dbfs/manage.go

@@ -120,6 +120,20 @@ func (f *DBFS) Create(ctx context.Context, path *fs.URI, fileType types.FileType
 
 			ancestor = newFile(ancestor, newFolder)
 		} else {
+			// valide file name
+			policy, err := f.getPreferredPolicy(ctx, ancestor, 0)
+			if err != nil {
+				return nil, err
+			}
+
+			if err := validateExtension(desired[i], policy); err != nil {
+				return nil, fs.ErrIllegalObjectName.WithError(err)
+			}
+
+			if err := validateFileNameRegexp(desired[i], policy); err != nil {
+				return nil, fs.ErrIllegalObjectName.WithError(err)
+			}
+
 			file, err := f.createFile(ctx, ancestor, desired[i], fileType, o)
 			if err != nil {
 				return nil, err
@@ -170,6 +184,10 @@ func (f *DBFS) Rename(ctx context.Context, path *fs.URI, newName string) (fs.Fil
 		if err := validateExtension(newName, policy); err != nil {
 			return nil, fs.ErrIllegalObjectName.WithError(err)
 		}
+
+		if err := validateFileNameRegexp(newName, policy); err != nil {
+			return nil, fs.ErrIllegalObjectName.WithError(err)
+		}
 	}
 
 	// Lock target

pkg/filemanager/fs/dbfs/validator.go

@@ -3,10 +3,12 @@ package dbfs
 import (
 	"context"
 	"fmt"
+	"regexp"
+	"strings"
+
 	"github.com/cloudreve/Cloudreve/v4/ent"
 	"github.com/cloudreve/Cloudreve/v4/pkg/filemanager/fs"
 	"github.com/cloudreve/Cloudreve/v4/pkg/util"
-	"strings"
 )
 
 const MaxFileNameLength = 256
@@ -30,18 +32,35 @@ func validateFileName(name string) error {
 
 // validateExtension validates the file extension.
 func validateExtension(name string, policy *ent.StoragePolicy) error {
-	// 不需要验证
 	if len(policy.Settings.FileType) == 0 {
 		return nil
 	}
 
-	if !util.IsInExtensionList(policy.Settings.FileType, name) {
+	inList := util.IsInExtensionList(policy.Settings.FileType, name)
+	if (policy.Settings.IsFileTypeDenyList && inList) || (!policy.Settings.IsFileTypeDenyList && !inList) {
 		return fmt.Errorf("file extension is not allowed")
 	}
 
 	return nil
 }
 
+func validateFileNameRegexp(name string, policy *ent.StoragePolicy) error {
+	if policy.Settings.NameRegexp == "" {
+		return nil
+	}
+
+	match, err := regexp.MatchString(policy.Settings.NameRegexp, name)
+	if err != nil {
+		return fmt.Errorf("invalid file name regexp: %s", err)
+	}
+
+	if (policy.Settings.IsNameRegexpDenyList && match) || (!policy.Settings.IsNameRegexpDenyList && !match) {
+		return fmt.Errorf("file name is not allowed by regexp")
+	}
+
+	return nil
+}
+
 // validateFileSize validates the file size.
 func validateFileSize(size int64, policy *ent.StoragePolicy) error {
 	if policy.MaxSize == 0 {
@@ -56,11 +75,15 @@ func validateFileSize(size int64, policy *ent.StoragePolicy) error {
 // validateNewFile validates the upload request.
 func validateNewFile(fileName string, size int64, policy *ent.StoragePolicy) error {
 	if err := validateFileName(fileName); err != nil {
-		return err
+		return fs.ErrIllegalObjectName.WithError(err)
 	}
 
 	if err := validateExtension(fileName, policy); err != nil {
-		return err
+		return fs.ErrIllegalObjectName.WithError(err)
+	}
+
+	if err := validateFileNameRegexp(fileName, policy); err != nil {
+		return fs.ErrIllegalObjectName.WithError(err)
 	}
 
 	if err := validateFileSize(size, policy); err != nil {

service/explorer/response.go

@@ -250,12 +250,15 @@ type DirectLink struct {
 }
 
 type StoragePolicy struct {
-	ID            string           `json:"id"`
-	Name          string           `json:"name"`
-	AllowedSuffix []string         `json:"allowed_suffix,omitempty"`
-	Type          types.PolicyType `json:"type"`
-	MaxSize       int64            `json:"max_size"`
-	Relay         bool             `json:"relay,omitempty"`
+	ID                string           `json:"id"`
+	Name              string           `json:"name"`
+	AllowedSuffix     []string         `json:"allowed_suffix,omitempty"`
+	DeniedSuffix      []string         `json:"denied_suffix,omitempty"`
+	AllowedNameRegexp string           `json:"allowed_name_regexp,omitempty"`
+	DeniedNameRegexp  string           `json:"denied_name_regexp,omitempty"`
+	Type              types.PolicyType `json:"type"`
+	MaxSize           int64            `json:"max_size"`
+	Relay             bool             `json:"relay,omitempty"`
 }
 
 type Entity struct {
@@ -442,14 +445,30 @@ func BuildStoragePolicy(sp *ent.StoragePolicy, hasher hashid.Encoder) *StoragePo
 	if sp == nil {
 		return nil
 	}
-	return &StoragePolicy{
-		ID:            hashid.EncodePolicyID(hasher, sp.ID),
-		Name:          sp.Name,
-		Type:          types.PolicyType(sp.Type),
-		MaxSize:       sp.MaxSize,
-		AllowedSuffix: sp.Settings.FileType,
-		Relay:         sp.Settings.Relay,
+
+	res := &StoragePolicy{
+		ID:      hashid.EncodePolicyID(hasher, sp.ID),
+		Name:    sp.Name,
+		Type:    types.PolicyType(sp.Type),
+		MaxSize: sp.MaxSize,
+		Relay:   sp.Settings.Relay,
+	}
+
+	if sp.Settings.IsFileTypeDenyList {
+		res.DeniedSuffix = sp.Settings.FileType
+	} else {
+		res.AllowedSuffix = sp.Settings.FileType
+	}
+
+	if sp.Settings.NameRegexp != "" {
+		if sp.Settings.IsNameRegexpDenyList {
+			res.DeniedNameRegexp = sp.Settings.NameRegexp
+		} else {
+			res.AllowedNameRegexp = sp.Settings.NameRegexp
+		}
 	}
+
+	return res
 }
 
 func WriteEventSourceHeader(c *gin.Context) {