9 files changed, 230 insertions, 308 deletions

diff --git a/vendor/github.com/labstack/echo/v4/CHANGELOG.md b/vendor/github.com/labstack/echo/v4/CHANGELOG.md
index 2fcb2ff7..e8f42200 100644
--- a/vendor/github.com/labstack/echo/v4/CHANGELOG.md
+++ b/vendor/github.com/labstack/echo/v4/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## v4.9.0 - 2022-09-04
+
+**Security**
+
+* Fix open redirect vulnerability in handlers serving static directories (e.Static, e.StaticFs, echo.StaticDirectoryHandler) [#2260](https://github.com/labstack/echo/pull/2260)
+
+**Enhancements**
+
+* Allow configuring ErrorHandler in CSRF middleware [#2257](https://github.com/labstack/echo/pull/2257)
+* Replace HTTP method constants in tests with stdlib constants [#2247](https://github.com/labstack/echo/pull/2247)
+
+
 ## v4.8.0 - 2022-08-10
 
 **Most notable things**
diff --git a/vendor/github.com/labstack/echo/v4/context_fs.go b/vendor/github.com/labstack/echo/v4/context_fs.go
index 11ee84bc..1038f892 100644
--- a/vendor/github.com/labstack/echo/v4/context_fs.go
+++ b/vendor/github.com/labstack/echo/v4/context_fs.go
@@ -1,33 +1,49 @@
-//go:build !go1.16
-// +build !go1.16
-
 package echo
 
 import (
+	"errors"
+	"io"
+	"io/fs"
 	"net/http"
-	"os"
 	"path/filepath"
 )
 
-func (c *context) File(file string) (err error) {
-	f, err := os.Open(file)
+func (c *context) File(file string) error {
+	return fsFile(c, file, c.echo.Filesystem)
+}
+
+// FileFS serves file from given file system.
+//
+// When dealing with `embed.FS` use `fs := echo.MustSubFS(fs, "rootDirectory") to create sub fs which uses necessary
+// prefix for directory path. This is necessary as `//go:embed assets/images` embeds files with paths
+// including `assets/images` as their prefix.
+func (c *context) FileFS(file string, filesystem fs.FS) error {
+	return fsFile(c, file, filesystem)
+}
+
+func fsFile(c Context, file string, filesystem fs.FS) error {
+	f, err := filesystem.Open(file)
 	if err != nil {
-		return NotFoundHandler(c)
+		return ErrNotFound
 	}
 	defer f.Close()
 
 	fi, _ := f.Stat()
 	if fi.IsDir() {
-		file = filepath.Join(file, indexPage)
-		f, err = os.Open(file)
+		file = filepath.ToSlash(filepath.Join(file, indexPage)) // ToSlash is necessary for Windows. fs.Open and os.Open are different in that aspect.
+		f, err = filesystem.Open(file)
 		if err != nil {
-			return NotFoundHandler(c)
+			return ErrNotFound
 		}
 		defer f.Close()
 		if fi, err = f.Stat(); err != nil {
-			return
+			return err
 		}
 	}
-	http.ServeContent(c.Response(), c.Request(), fi.Name(), fi.ModTime(), f)
-	return
+	ff, ok := f.(io.ReadSeeker)
+	if !ok {
+		return errors.New("file does not implement io.ReadSeeker")
+	}
+	http.ServeContent(c.Response(), c.Request(), fi.Name(), fi.ModTime(), ff)
+	return nil
 }
diff --git a/vendor/github.com/labstack/echo/v4/context_fs_go1.16.go b/vendor/github.com/labstack/echo/v4/context_fs_go1.16.go
deleted file mode 100644
index c1c724af..00000000
--- a/vendor/github.com/labstack/echo/v4/context_fs_go1.16.go
+++ /dev/null
@@ -1,52 +0,0 @@
-//go:build go1.16
-// +build go1.16
-
-package echo
-
-import (
-	"errors"
-	"io"
-	"io/fs"
-	"net/http"
-	"path/filepath"
-)
-
-func (c *context) File(file string) error {
-	return fsFile(c, file, c.echo.Filesystem)
-}
-
-// FileFS serves file from given file system.
-//
-// When dealing with `embed.FS` use `fs := echo.MustSubFS(fs, "rootDirectory") to create sub fs which uses necessary
-// prefix for directory path. This is necessary as `//go:embed assets/images` embeds files with paths
-// including `assets/images` as their prefix.
-func (c *context) FileFS(file string, filesystem fs.FS) error {
-	return fsFile(c, file, filesystem)
-}
-
-func fsFile(c Context, file string, filesystem fs.FS) error {
-	f, err := filesystem.Open(file)
-	if err != nil {
-		return ErrNotFound
-	}
-	defer f.Close()
-
-	fi, _ := f.Stat()
-	if fi.IsDir() {
-		file = filepath.ToSlash(filepath.Join(file, indexPage)) // ToSlash is necessary for Windows. fs.Open and os.Open are different in that aspect.
-		f, err = filesystem.Open(file)
-		if err != nil {
-			return ErrNotFound
-		}
-		defer f.Close()
-		if fi, err = f.Stat(); err != nil {
-			return err
-		}
-	}
-	ff, ok := f.(io.ReadSeeker)
-	if !ok {
-		return errors.New("file does not implement io.ReadSeeker")
-	}
-	http.ServeContent(c.Response(), c.Request(), fi.Name(), fi.ModTime(), ff)
-	return nil
-}
diff --git a/vendor/github.com/labstack/echo/v4/echo.go b/vendor/github.com/labstack/echo/v4/echo.go
index 291c4047..5ae8a142 100644
--- a/vendor/github.com/labstack/echo/v4/echo.go
+++ b/vendor/github.com/labstack/echo/v4/echo.go
@@ -248,7 +248,7 @@ const (
 
 const (
 	// Version of Echo
-	Version = "4.8.0"
+	Version = "4.9.0"
 	website = "https://echo.labstack.com"
 	// http://patorjk.com/software/taag/#p=display&f=Small%20Slant&t=Echo
 	banner = `
diff --git a/vendor/github.com/labstack/echo/v4/echo_fs.go b/vendor/github.com/labstack/echo/v4/echo_fs.go
index c3790545..b8526da9 100644
--- a/vendor/github.com/labstack/echo/v4/echo_fs.go
+++ b/vendor/github.com/labstack/echo/v4/echo_fs.go
@@ -1,62 +1,175 @@
-//go:build !go1.16
-// +build !go1.16
-
 package echo
 
 import (
+	"fmt"
+	"io/fs"
 	"net/http"
 	"net/url"
 	"os"
 	"path/filepath"
+	"runtime"
+	"strings"
 )
 
 type filesystem struct {
+	// Filesystem is file system used by Static and File handlers to access files.
+	// Defaults to os.DirFS(".")
+	//
+	// When dealing with `embed.FS` use `fs := echo.MustSubFS(fs, "rootDirectory") to create sub fs which uses necessary
+	// prefix for directory path. This is necessary as `//go:embed assets/images` embeds files with paths
+	// including `assets/images` as their prefix.
+	Filesystem fs.FS
 }
 
 func createFilesystem() filesystem {
-	return filesystem{}
+	return filesystem{
+		Filesystem: newDefaultFS(),
+	}
 }
 
-// Static registers a new route with path prefix to serve static files from the
-// provided root directory.
-func (e *Echo) Static(prefix, root string) *Route {
-	if root == "" {
-		root = "." // For security we want to restrict to CWD.
-	}
-	return e.static(prefix, root, e.GET)
+// Static registers a new route with path prefix to serve static files from the provided root directory.
+func (e *Echo) Static(pathPrefix, fsRoot string) *Route {
+	subFs := MustSubFS(e.Filesystem, fsRoot)
+	return e.Add(
+		http.MethodGet,
+		pathPrefix+"*",
+		StaticDirectoryHandler(subFs, false),
+	)
 }
 
-func (common) static(prefix, root string, get func(string, HandlerFunc, ...MiddlewareFunc) *Route) *Route {
-	h := func(c Context) error {
-		p, err := url.PathUnescape(c.Param("*"))
-		if err != nil {
-			return err
+// StaticFS registers a new route with path prefix to serve static files from the provided file system.
+//
+// When dealing with `embed.FS` use `fs := echo.MustSubFS(fs, "rootDirectory") to create sub fs which uses necessary
+// prefix for directory path. This is necessary as `//go:embed assets/images` embeds files with paths
+// including `assets/images` as their prefix.
+func (e *Echo) StaticFS(pathPrefix string, filesystem fs.FS) *Route {
+	return e.Add(
+		http.MethodGet,
+		pathPrefix+"*",
+		StaticDirectoryHandler(filesystem, false),
+	)
+}
+
+// StaticDirectoryHandler creates handler function to serve files from provided file system
+// When disablePathUnescaping is set then file name from path is not unescaped and is served as is.
+func StaticDirectoryHandler(fileSystem fs.FS, disablePathUnescaping bool) HandlerFunc {
+	return func(c Context) error {
+		p := c.Param("*")
+		if !disablePathUnescaping { // when router is already unescaping we do not want to do is twice
+			tmpPath, err := url.PathUnescape(p)
+			if err != nil {
+				return fmt.Errorf("failed to unescape path variable: %w", err)
+			}
+			p = tmpPath
 		}
 
-		name := filepath.Join(root, filepath.Clean("/"+p)) // "/"+ for security
-		fi, err := os.Stat(name)
+		// fs.FS.Open() already assumes that file names are relative to FS root path and considers name with prefix `/` as invalid
+		name := filepath.ToSlash(filepath.Clean(strings.TrimPrefix(p, "/")))
+		fi, err := fs.Stat(fileSystem, name)
 		if err != nil {
-			// The access path does not exist
-			return NotFoundHandler(c)
+			return ErrNotFound
 		}
 
 		// If the request is for a directory and does not end with "/"
 		p = c.Request().URL.Path // path must not be empty.
-		if fi.IsDir() && p[len(p)-1] != '/' {
+		if fi.IsDir() && len(p) > 0 && p[len(p)-1] != '/' {
 			// Redirect to ends with "/"
-			return c.Redirect(http.StatusMovedPermanently, p+"/")
+			return c.Redirect(http.StatusMovedPermanently, sanitizeURI(p+"/"))
 		}
-		return c.File(name)
-	}
-	// Handle added routes based on trailing slash:
-	// 	/prefix  => exact route "/prefix" + any route "/prefix/*"
-	// 	/prefix/ => only any route "/prefix/*"
-	if prefix != "" {
-		if prefix[len(prefix)-1] == '/' {
-			// Only add any route for intentional trailing slash
-			return get(prefix+"*", h)
+		return fsFile(c, name, fileSystem)
+	}
+}
+
+// FileFS registers a new route with path to serve file from the provided file system.
+func (e *Echo) FileFS(path, file string, filesystem fs.FS, m ...MiddlewareFunc) *Route {
+	return e.GET(path, StaticFileHandler(file, filesystem), m...)
+}
+
+// StaticFileHandler creates handler function to serve file from provided file system
+func StaticFileHandler(file string, filesystem fs.FS) HandlerFunc {
+	return func(c Context) error {
+		return fsFile(c, file, filesystem)
+	}
+}
+
+// defaultFS exists to preserve pre v4.7.0 behaviour where files were open by `os.Open`.
+// v4.7 introduced `echo.Filesystem` field which is Go1.16+ `fs.Fs` interface.
+// Difference between `os.Open` and `fs.Open` is that FS does not allow opening path that start with `.`, `..` or `/`
+// etc. For example previously you could have `../images` in your application but `fs := os.DirFS("./")` would not
+// allow you to use `fs.Open("../images")` and this would break all old applications that rely on being able to
+// traverse up from current executable run path.
+// NB: private because you really should use fs.FS implementation instances
+type defaultFS struct {
+	prefix string
+	fs     fs.FS
+}
+
+func newDefaultFS() *defaultFS {
+	dir, _ := os.Getwd()
+	return &defaultFS{
+		prefix: dir,
+		fs:     nil,
+	}
+}
+
+func (fs defaultFS) Open(name string) (fs.File, error) {
+	if fs.fs == nil {
+		return os.Open(name)
+	}
+	return fs.fs.Open(name)
+}
+
+func subFS(currentFs fs.FS, root string) (fs.FS, error) {
+	root = filepath.ToSlash(filepath.Clean(root)) // note: fs.FS operates only with slashes. `ToSlash` is necessary for Windows
+	if dFS, ok := currentFs.(*defaultFS); ok {
+		// we need to make exception for `defaultFS` instances as it interprets root prefix differently from fs.FS.
+		// fs.Fs.Open does not like relative paths ("./", "../") and absolute paths at all but prior echo.Filesystem we
+		// were able to use paths like `./myfile.log`, `/etc/hosts` and these would work fine with `os.Open` but not with fs.Fs
+		if isRelativePath(root) {
+			root = filepath.Join(dFS.prefix, root)
 		}
-		get(prefix, h)
+		return &defaultFS{
+			prefix: root,
+			fs:     os.DirFS(root),
+		}, nil
+	}
+	return fs.Sub(currentFs, root)
+}
+
+func isRelativePath(path string) bool {
+	if path == "" {
+		return true
+	}
+	if path[0] == '/' {
+		return false
+	}
+	if runtime.GOOS == "windows" && strings.IndexByte(path, ':') != -1 {
+		// https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file?redirectedfrom=MSDN#file_and_directory_names
+		// https://docs.microsoft.com/en-us/dotnet/standard/io/file-path-formats
+		return false
+	}
+	return true
+}
+
+// MustSubFS creates sub FS from current filesystem or panic on failure.
+// Panic happens when `fsRoot` contains invalid path according to `fs.ValidPath` rules.
+//
+// MustSubFS is helpful when dealing with `embed.FS` because for example `//go:embed assets/images` embeds files with
+// paths including `assets/images` as their prefix. In that case use `fs := echo.MustSubFS(fs, "rootDirectory") to
+// create sub fs which uses necessary prefix for directory path.
+func MustSubFS(currentFs fs.FS, fsRoot string) fs.FS {
+	subFs, err := subFS(currentFs, fsRoot)
+	if err != nil {
+		panic(fmt.Errorf("can not create sub FS, invalid root given, err: %w", err))
+	}
+	return subFs
+}
+
+func sanitizeURI(uri string) string {
+	// double slash `\\`, `//` or even `\/` is absolute uri for browsers and by redirecting request to that uri
+	// we are vulnerable to open redirect attack. so replace all slashes from the beginning with single slash
+	if len(uri) > 1 && (uri[0] == '\\' || uri[0] == '/') && (uri[1] == '\\' || uri[1] == '/') {
+		uri = "/" + strings.TrimLeft(uri, `/\`)
 	}
-	return get(prefix+"/*", h)
+	return uri
 }
diff --git a/vendor/github.com/labstack/echo/v4/echo_fs_go1.16.go b/vendor/github.com/labstack/echo/v4/echo_fs_go1.16.go
deleted file mode 100644
index eb17768a..00000000
--- a/vendor/github.com/labstack/echo/v4/echo_fs_go1.16.go
+++ /dev/null
@@ -1,169 +0,0 @@
-//go:build go1.16
-// +build go1.16
-
-package echo
-
-import (
-	"fmt"
-	"io/fs"
-	"net/http"
-	"net/url"
-	"os"
-	"path/filepath"
-	"runtime"
-	"strings"
-)
-
-type filesystem struct {
-	// Filesystem is file system used by Static and File handlers to access files.
-	// Defaults to os.DirFS(".")
-	//
-	// When dealing with `embed.FS` use `fs := echo.MustSubFS(fs, "rootDirectory") to create sub fs which uses necessary
-	// prefix for directory path. This is necessary as `//go:embed assets/images` embeds files with paths
-	// including `assets/images` as their prefix.
-	Filesystem fs.FS
-}
-
-func createFilesystem() filesystem {
-	return filesystem{
-		Filesystem: newDefaultFS(),
-	}
-}
-
-// Static registers a new route with path prefix to serve static files from the provided root directory.
-func (e *Echo) Static(pathPrefix, fsRoot string) *Route {
-	subFs := MustSubFS(e.Filesystem, fsRoot)
-	return e.Add(
-		http.MethodGet,
-		pathPrefix+"*",
-		StaticDirectoryHandler(subFs, false),
-	)
-}
-
-// StaticFS registers a new route with path prefix to serve static files from the provided file system.
-//
-// When dealing with `embed.FS` use `fs := echo.MustSubFS(fs, "rootDirectory") to create sub fs which uses necessary
-// prefix for directory path. This is necessary as `//go:embed assets/images` embeds files with paths
-// including `assets/images` as their prefix.
-func (e *Echo) StaticFS(pathPrefix string, filesystem fs.FS) *Route {
-	return e.Add(
-		http.MethodGet,
-		pathPrefix+"*",
-		StaticDirectoryHandler(filesystem, false),
-	)
-}
-
-// StaticDirectoryHandler creates handler function to serve files from provided file system
-// When disablePathUnescaping is set then file name from path is not unescaped and is served as is.
-func StaticDirectoryHandler(fileSystem fs.FS, disablePathUnescaping bool) HandlerFunc {
-	return func(c Context) error {
-		p := c.Param("*")
-		if !disablePathUnescaping { // when router is already unescaping we do not want to do is twice
-			tmpPath, err := url.PathUnescape(p)
-			if err != nil {
-				return fmt.Errorf("failed to unescape path variable: %w", err)
-			}
-			p = tmpPath
-		}
-
-		// fs.FS.Open() already assumes that file names are relative to FS root path and considers name with prefix `/` as invalid
-		name := filepath.ToSlash(filepath.Clean(strings.TrimPrefix(p, "/")))
-		fi, err := fs.Stat(fileSystem, name)
-		if err != nil {
-			return ErrNotFound
-		}
-
-		// If the request is for a directory and does not end with "/"
-		p = c.Request().URL.Path // path must not be empty.
-		if fi.IsDir() && len(p) > 0 && p[len(p)-1] != '/' {
-			// Redirect to ends with "/"
-			return c.Redirect(http.StatusMovedPermanently, p+"/")
-		}
-		return fsFile(c, name, fileSystem)
-	}
-}
-
-// FileFS registers a new route with path to serve file from the provided file system.
-func (e *Echo) FileFS(path, file string, filesystem fs.FS, m ...MiddlewareFunc) *Route {
-	return e.GET(path, StaticFileHandler(file, filesystem), m...)
-}
-
-// StaticFileHandler creates handler function to serve file from provided file system
-func StaticFileHandler(file string, filesystem fs.FS) HandlerFunc {
-	return func(c Context) error {
-		return fsFile(c, file, filesystem)
-	}
-}
-
-// defaultFS exists to preserve pre v4.7.0 behaviour where files were open by `os.Open`.
-// v4.7 introduced `echo.Filesystem` field which is Go1.16+ `fs.Fs` interface.
-// Difference between `os.Open` and `fs.Open` is that FS does not allow opening path that start with `.`, `..` or `/`
-// etc. For example previously you could have `../images` in your application but `fs := os.DirFS("./")` would not
-// allow you to use `fs.Open("../images")` and this would break all old applications that rely on being able to
-// traverse up from current executable run path.
-// NB: private because you really should use fs.FS implementation instances
-type defaultFS struct {
-	prefix string
-	fs     fs.FS
-}
-
-func newDefaultFS() *defaultFS {
-	dir, _ := os.Getwd()
-	return &defaultFS{
-		prefix: dir,
-		fs:     nil,
-	}
-}
-
-func (fs defaultFS) Open(name string) (fs.File, error) {
-	if fs.fs == nil {
-		return os.Open(name)
-	}
-	return fs.fs.Open(name)
-}
-
-func subFS(currentFs fs.FS, root string) (fs.FS, error) {
-	root = filepath.ToSlash(filepath.Clean(root)) // note: fs.FS operates only with slashes. `ToSlash` is necessary for Windows
-	if dFS, ok := currentFs.(*defaultFS); ok {
-		// we need to make exception for `defaultFS` instances as it interprets root prefix differently from fs.FS.
-		// fs.Fs.Open does not like relative paths ("./", "../") and absolute paths at all but prior echo.Filesystem we
-		// were able to use paths like `./myfile.log`, `/etc/hosts` and these would work fine with `os.Open` but not with fs.Fs
-		if isRelativePath(root) {
-			root = filepath.Join(dFS.prefix, root)
-		}
-		return &defaultFS{
-			prefix: root,
-			fs:     os.DirFS(root),
-		}, nil
-	}
-	return fs.Sub(currentFs, root)
-}
-
-func isRelativePath(path string) bool {
-	if path == "" {
-		return true
-	}
-	if path[0] == '/' {
-		return false
-	}
-	if runtime.GOOS == "windows" && strings.IndexByte(path, ':') != -1 {
-		// https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file?redirectedfrom=MSDN#file_and_directory_names
-		// https://docs.microsoft.com/en-us/dotnet/standard/io/file-path-formats
-		return false
-	}
-	return true
-}
-
-// MustSubFS creates sub FS from current filesystem or panic on failure.
-// Panic happens when `fsRoot` contains invalid path according to `fs.ValidPath` rules.
-//
-// MustSubFS is helpful when dealing with `embed.FS` because for example `//go:embed assets/images` embeds files with
-// paths including `assets/images` as their prefix. In that case use `fs := echo.MustSubFS(fs, "rootDirectory") to
-// create sub fs which uses necessary prefix for directory path.
-func MustSubFS(currentFs fs.FS, fsRoot string) fs.FS {
-	subFs, err := subFS(currentFs, fsRoot)
-	if err != nil {
-		panic(fmt.Errorf("can not create sub FS, invalid root given, err: %w", err))
-	}
-	return subFs
-}
diff --git a/vendor/github.com/labstack/echo/v4/group_fs.go b/vendor/github.com/labstack/echo/v4/group_fs.go
index 0a1ce4a9..aedc4c6a 100644
--- a/vendor/github.com/labstack/echo/v4/group_fs.go
+++ b/vendor/github.com/labstack/echo/v4/group_fs.go
@@ -1,9 +1,30 @@
-//go:build !go1.16
-// +build !go1.16
-
 package echo
 
+import (
+	"io/fs"
+	"net/http"
+)
+
 // Static implements `Echo#Static()` for sub-routes within the Group.
-func (g *Group) Static(prefix, root string) {
-	g.static(prefix, root, g.GET)
+func (g *Group) Static(pathPrefix, fsRoot string) {
+	subFs := MustSubFS(g.echo.Filesystem, fsRoot)
+	g.StaticFS(pathPrefix, subFs)
+}
+
+// StaticFS implements `Echo#StaticFS()` for sub-routes within the Group.
+//
+// When dealing with `embed.FS` use `fs := echo.MustSubFS(fs, "rootDirectory") to create sub fs which uses necessary
+// prefix for directory path. This is necessary as `//go:embed assets/images` embeds files with paths
+// including `assets/images` as their prefix.
+func (g *Group) StaticFS(pathPrefix string, filesystem fs.FS) {
+	g.Add(
+		http.MethodGet,
+		pathPrefix+"*",
+		StaticDirectoryHandler(filesystem, false),
+	)
+}
+
+// FileFS implements `Echo#FileFS()` for sub-routes within the Group.
+func (g *Group) FileFS(path, file string, filesystem fs.FS, m ...MiddlewareFunc) *Route {
+	return g.GET(path, StaticFileHandler(file, filesystem), m...)
 }
diff --git a/vendor/github.com/labstack/echo/v4/group_fs_go1.16.go b/vendor/github.com/labstack/echo/v4/group_fs_go1.16.go
deleted file mode 100644
index 2ba52b5e..00000000
--- a/vendor/github.com/labstack/echo/v4/group_fs_go1.16.go
+++ /dev/null
@@ -1,33 +0,0 @@
-//go:build go1.16
-// +build go1.16
-
-package echo
-
-import (
-	"io/fs"
-	"net/http"
-)
-
-// Static implements `Echo#Static()` for sub-routes within the Group.
-func (g *Group) Static(pathPrefix, fsRoot string) {
-	subFs := MustSubFS(g.echo.Filesystem, fsRoot)
-	g.StaticFS(pathPrefix, subFs)
-}
-
-// StaticFS implements `Echo#StaticFS()` for sub-routes within the Group.
-//
-// When dealing with `embed.FS` use `fs := echo.MustSubFS(fs, "rootDirectory") to create sub fs which uses necessary
-// prefix for directory path. This is necessary as `//go:embed assets/images` embeds files with paths
-// including `assets/images` as their prefix.
-func (g *Group) StaticFS(pathPrefix string, filesystem fs.FS) {
-	g.Add(
-		http.MethodGet,
-		pathPrefix+"*",
-		StaticDirectoryHandler(filesystem, false),
-	)
-}
-
-// FileFS implements `Echo#FileFS()` for sub-routes within the Group.
-func (g *Group) FileFS(path, file string, filesystem fs.FS, m ...MiddlewareFunc) *Route {
-	return g.GET(path, StaticFileHandler(file, filesystem), m...)
-}
diff --git a/vendor/github.com/labstack/echo/v4/middleware/csrf.go b/vendor/github.com/labstack/echo/v4/middleware/csrf.go
index 61299f5c..ea90fdba 100644
--- a/vendor/github.com/labstack/echo/v4/middleware/csrf.go
+++ b/vendor/github.com/labstack/echo/v4/middleware/csrf.go
@@ -61,7 +61,13 @@ type (
 		// Indicates SameSite mode of the CSRF cookie.
 		// Optional. Default value SameSiteDefaultMode.
 		CookieSameSite http.SameSite `yaml:"cookie_same_site"`
+
+		// ErrorHandler defines a function which is executed for returning custom errors.
+		ErrorHandler CSRFErrorHandler
 	}
+
+	// CSRFErrorHandler is a function which is executed for creating custom errors.
+	CSRFErrorHandler func(err error, c echo.Context) error
 )
 
 // ErrCSRFInvalid is returned when CSRF check fails
@@ -154,8 +160,9 @@ func CSRFWithConfig(config CSRFConfig) echo.MiddlewareFunc {
 						lastTokenErr = ErrCSRFInvalid
 					}
 				}
+				var finalErr error
 				if lastTokenErr != nil {
-					return lastTokenErr
+					finalErr = lastTokenErr
 				} else if lastExtractorErr != nil {
 					// ugly part to preserve backwards compatible errors. someone could rely on them
 					if lastExtractorErr == errQueryExtractorValueMissing {
@@ -167,7 +174,14 @@ func CSRFWithConfig(config CSRFConfig) echo.MiddlewareFunc {
 					} else {
 						lastExtractorErr = echo.NewHTTPError(http.StatusBadRequest, lastExtractorErr.Error())
 					}
-					return lastExtractorErr
+					finalErr = lastExtractorErr
+				}
+
+				if finalErr != nil {
+					if config.ErrorHandler != nil {
+						return config.ErrorHandler(finalErr, c)
+					}
+					return finalErr
 				}
 			}