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package http
import (
"net/http"
"strings"
"path"
"github.com/sirupsen/logrus"
"os"
"path/filepath"
)
var (
forbiddenFiles = []string{".php", ".htaccess"}
)
// staticServer serves static files
type staticServer struct {
root http.Dir
}
// serve attempts to serve static file and returns true in case of success, will return false in case if file not
// found, not allowed or on read error.
func (svr *staticServer) serve(w http.ResponseWriter, r *http.Request) bool {
fpath := r.URL.Path
if !strings.HasPrefix(fpath, "/") {
fpath = "/" + fpath
}
fpath = path.Clean(fpath)
if svr.forbidden(fpath) {
logrus.Warningf("attempt to access forbidden file %s", fpath) // todo: better logs
return false
}
f, err := svr.root.Open(fpath)
if err != nil {
if !os.IsNotExist(err) {
logrus.Error(err) //todo: rr or access error
}
return false
}
defer f.Close()
d, err := f.Stat()
if err != nil {
logrus.Error(err) //todo: rr or access error
return false
}
if d.IsDir() {
// do not serve directories
return false
}
http.ServeContent(w, r, d.Name(), d.ModTime(), f)
return true
}
// forbidden returns true if file has forbidden extension.
func (svr *staticServer) forbidden(path string) bool {
ext := strings.ToLower(filepath.Ext(path))
for _, exl := range forbiddenFiles {
if ext == exl {
return true
}
}
return false
}
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