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Fix Single Page Application example in README.md file #678

Merged
merged 10 commits into from
Aug 16, 2023
15 changes: 3 additions & 12 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -247,20 +247,11 @@ type spaHandler struct {
// file located at the index path on the SPA handler will be served. This
// is suitable behavior for serving an SPA (single page application).
func (h spaHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// get the absolute path to prevent directory traversal
path, err := filepath.Abs(r.URL.Path)
if err != nil {
// if we failed to get the absolute path respond with a 400 bad request
// and stop
http.Error(w, err.Error(), http.StatusBadRequest)
return
}

// prepend the path with the path to the static directory
path = filepath.Join(h.staticPath, path)
// Join internally call path.Clean to prevent directory traversal
path := filepath.Join(h.staticPath, path)

// check whether a file exists at the given path
_, err = os.Stat(path)
_, err := os.Stat(path)
if os.IsNotExist(err) {
// file does not exist, serve index.html
http.ServeFile(w, r, filepath.Join(h.staticPath, h.indexPath))
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