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fileserver: properly handle escaped/non-ascii paths (#4332)

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* fileserver: properly handle escaped/non-ascii paths

* fileserver: tests: accommodate Windows hate of colons in files names
This commit is contained in:
Mohammed Al Sahaf
2021-09-16 23:40:31 +03:00
committed by GitHub
parent 2ebfda1ae9
commit 33c70f418f
6 changed files with 62 additions and 3 deletions
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11
modules/caddyhttp/fileserver/staticfiles.go
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@ -19,6 +19,7 @@ import (
weakrand "math/rand"
"mime"
"net/http"
"net/url"
"os"
"path"
"path/filepath"
@ -165,6 +166,16 @@ func (fsrv *FileServer) ServeHTTP(w http.ResponseWriter, r *http.Request, next c
filesToHide := fsrv.transformHidePaths(repl)
root := repl.ReplaceAll(fsrv.Root, ".")
// PathUnescape returns an error if the escapes aren't well-formed,
// meaning the count % matches the RFC. Return early if the escape is
// improper.
if _, err := url.PathUnescape(r.URL.Path); err != nil {
fsrv.logger.Debug("improper path escape",
zap.String("site_root", root),
zap.String("request_path", r.URL.Path),
zap.Error(err))
return err
}
filename := caddyhttp.SanitizedPathJoin(root, r.URL.Path)
fsrv.logger.Debug("sanitized path join",