Method CopyTo

context/response_recorder.go:216–261

CopyTo writes a response writer (temp: status code, headers and body) to another response writer

(res ResponseWriter)

// CopyTo writes a response writer (temp: status code, headers and body) to another response writer
func (w *ResponseRecorder) CopyTo(res ResponseWriter) {
	if to, ok := res.(*ResponseRecorder); ok {

		// set the status code, to is first ( probably an error? (context.StatusCodeNotSuccessful, defaults to >=400).
		if statusCode := w.ResponseWriter.StatusCode(); statusCode == defaultStatusCode {
			to.WriteHeader(statusCode)
		}

		if beforeFlush := w.ResponseWriter.GetBeforeFlush(); beforeFlush != nil {
			// if to had a before flush, lets combine them
			if to.GetBeforeFlush() != nil {
				nextBeforeFlush := beforeFlush
				prevBeforeFlush := to.GetBeforeFlush()
				to.SetBeforeFlush(func() {
					prevBeforeFlush()
					nextBeforeFlush()
				})
			} else {
				to.SetBeforeFlush(w.ResponseWriter.GetBeforeFlush())
			}
		}

		// if "to" is *responseWriter and it never written before (if -1),
		// set the "w"'s written length.
		if resW, ok := to.ResponseWriter.(*responseWriter); ok {
			if resW.Written() != StatusCodeWritten {
				resW.written = w.ResponseWriter.Written()
			}
		}

		// append the headers
		for k, values := range w.headers {
			for _, v := range values {
				if to.headers.Get(v) == "" {
					to.headers.Add(k, v)
				}
			}
		}

		// append the body
		if len(w.chunks) > 0 {
			// ignore error
			to.Write(w.chunks)
		}
	}
}

// Flush sends any buffered data to the client.
func (w *ResponseRecorder) Flush() {