// name is '/'-separated, not filepath.Separator.
func (fserver *FileServer) serveFile(
logger termlog.Logger,
w http.ResponseWriter,
r *http.Request,
name string,
redirect bool,
) {
const indexPage = "/index.html"
// redirect .../index.html to .../
// can't use Redirect() because that would make the path absolute,
// which would be a problem running under StripPrefix
if strings.HasSuffix(r.URL.Path, indexPage) {
logger.SayAs(
"debug", "debug fileserver: redirecting %s -> ./", indexPage,
)
localRedirect(w, r, "./")
return
}
f, err := fserver.Root.Open(name)
if err != nil {
logger.WarnAs("debug", "debug fileserver: %s", err)
if err := fserver.notFound(logger, w, r, name, nil); err != nil {
logger.Shout("Internal error: %s", err)
}
return
}
defer func() { _ = f.Close() }()
d, err1 := f.Stat()
if err1 != nil {
logger.WarnAs("debug", "debug fileserver: %s", err)
if err := fserver.notFound(logger, w, r, name, nil); err != nil {
logger.Shout("Internal error: %s", err)
}
return
}
if redirect {
// redirect to canonical path: / at end of directory url
url := r.URL.Path
if !strings.HasPrefix(url, "/") {
url = "/" + url
}
if d.IsDir() {
if url[len(url)-1] != '/' {
localRedirect(w, r, path.Base(url)+"/")
return
}
} else if url[len(url)-1] == '/' {
localRedirect(w, r, "../"+path.Base(url))
return
}
}
// use contents of index.html for directory, if present
if d.IsDir() {
index := name + indexPage
ff, err := fserver.Root.Open(index)
if err == nil {
defer func() { _ = ff.Close() }()
dd, err := ff.Stat()
if err == nil {
name = index
d = dd
f = ff
}
}
}
// Still a directory? (we didn't find an index.html file)
if d.IsDir() {
if err := fserver.notFound(logger, w, r, name, &f); err != nil {
logger.Shout("Internal error: %s", err)
}
return
}
// serverContent will check modification time
sizeFunc := func() (int64, error) { return d.Size(), nil }
err = serveContent(fserver.Inject, w, r, d.Name(), d.ModTime(), sizeFunc, f)
if err != nil {
logger.Warn("Error serving file: %s", err)
}
}
