speedtest-go/web/fs.go
2020-08-15 23:13:23 +08:00

55 lines
1.0 KiB
Go

package web
import (
"io"
"net/http"
"os"
)
// Credit: https://stackoverflow.com/questions/49589685/good-way-to-disable-directory-listing-with-http-fileserver-in-go
type justFilesFilesystem struct {
fs http.FileSystem
// readDirBatchSize - configuration parameter for `Readdir` func
readDirBatchSize int
}
func (fs justFilesFilesystem) Open(name string) (http.File, error) {
f, err := fs.fs.Open(name)
if err != nil {
return nil, err
}
return neuteredStatFile{File: f, readDirBatchSize: fs.readDirBatchSize}, nil
}
type neuteredStatFile struct {
http.File
readDirBatchSize int
}
func (e neuteredStatFile) Stat() (os.FileInfo, error) {
s, err := e.File.Stat()
if err != nil {
return nil, err
}
if s.IsDir() {
LOOP:
for {
fl, err := e.File.Readdir(e.readDirBatchSize)
switch err {
case io.EOF:
break LOOP
case nil:
for _, f := range fl {
if f.Name() == "index.html" {
return s, err
}
}
default:
return nil, err
}
}
return nil, os.ErrNotExist
}
return s, err
}