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package main
import (
type fsTransport struct {
fs http.Dir
func newFsTransport() fsTransport {
return fsTransport{fs: http.Dir(conf.LocalFileSystemRoot)}
func (t fsTransport) RoundTrip(req *http.Request) (resp *http.Response, err error) {
f, err := t.fs.Open(req.URL.Path)
if err != nil {
return nil, err
fi, err := f.Stat()
if err != nil {
return nil, err
if fi.IsDir() {
return nil, fmt.Errorf("%s is a directory", req.URL.Path)
return &http.Response{
Status: "200 OK",
StatusCode: 200,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Header: make(http.Header),
ContentLength: fi.Size(),
Body: f,
Close: true,
Request: req,
}, nil
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