Method Write

minify.go:321–344

Write intercepts any writes to the response writer. The first write will extract the Content-Type as the mediatype. Otherwise it falls back to the RequestURI extension.

(b []byte)

// Write intercepts any writes to the response writer.
// The first write will extract the Content-Type as the mediatype. Otherwise it falls back to the RequestURI extension.
func (w *responseWriter) Write(b []byte) (int, error) {
	if w.z == nil {
		// first write
		if mediatype := w.ResponseWriter.Header().Get("Content-Type"); mediatype != "" {
			w.mediatype = mediatype
		}
		if _, params, minifier := w.m.Match(w.mediatype); minifier != nil {
			pr, pw := io.Pipe()
			z := &writer{pw, sync.WaitGroup{}, false, nil}
			z.wg.Add(1)
			go func() {
				defer z.wg.Done()
				defer pr.Close()
				if err := minifier(w.m, w.ResponseWriter, pr, params); err != nil {
					z.err = err
				}
			}()
			w.z = z
		} else {
			w.z = w.ResponseWriter
		}
	}
	return w.z.Write(b)
}

// Close must be called when writing has finished. It returns the error from the minifier.
func (w *responseWriter) Close() error {