StatusMultipleChoices   = 300 // RFC 9110, 15.4.1
	StatusMovedPermanently  = 301 // RFC 9110, 15.4.2
	StatusFound             = 302 // RFC 9110, 15.4.3
	StatusSeeOther          = 303 // RFC 9110, 15.4.4
	StatusNotModified       = 304 // RFC 9110, 15.4.5
	StatusUseProxy          = 305 // RFC 9110, 15.4.6
	_                       = 306 // RFC 9110, 15.4.7 (Unused)
	StatusTemporaryRedirect = 307 // RFC 9110, 15.4.8

	// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/If-None-Match#directives
	if clientCachedHash := req.Header.Get("If-None-Match"); quotedHash == clientCachedHash {
		w.WriteHeader(http.StatusNotModified)
		return
	}

	responsewriters.WriteObjectNegotiated(
		serializer,
		DiscoveryEndpointRestrictions,
		targetGV,
		w,
		req,
		http.StatusOK,
		object,
		true,
	)
}

		r.writeCGIHeader(p)
	}
	return r.w.Write(p)
}

func (r *response) WriteHeader(code int) {
	if r.wroteHeader {
		return
	}
	r.wroteHeader = true
	r.code = code
	if code == http.StatusNotModified {
		// Must not have body.
		r.header.Del("Content-Type")
		r.header.Del("Content-Length")
		r.header.Del("Transfer-Encoding")
	}
	if r.header.Get("Date") == "" {

	if ifNoneMatchETagHeader != "" {
		if isETagEqual(objInfo.ETag, ifNoneMatchETagHeader) {
			// If the object ETag matches with the specified ETag.
			writeHeadersPrecondition(w, objInfo)
			w.WriteHeader(http.StatusNotModified)
			return true
		}
	}

	// If-Modified-Since : Return the object only if it has been modified since the specified time,
	// otherwise return a 304 (not modified).

	second, secondBody, _ := fetchPath(manager, "application/json", discoveryPath, initial.Header.Get("ETag"))

	assert.Equal(t, http.StatusOK, initial.StatusCode, "initial response should be 200 OK")
	assert.Equal(t, http.StatusNotModified, second.StatusCode, "second response should be 304 Not Modified")
	assert.Equal(t, initial.Header.Get("ETag"), second.Header.Get("ETag"), "ETag of both requests should be equal")

	"Moved Permanently":               http.StatusMovedPermanently,
	"Found":                           http.StatusFound,
	"See Other":                       http.StatusSeeOther,
	"Not Modified":                    http.StatusNotModified,
	"Use Proxy":                       http.StatusUseProxy,
	"Temporary Redirect":              http.StatusTemporaryRedirect,
	"Permanent Redirect":              http.StatusPermanentRedirect,

	delete(h, "Content-Length")
	delete(h, "Content-Encoding")
	if h.Get("Etag") != "" {
		delete(h, "Last-Modified")
	}
	w.WriteHeader(StatusNotModified)
}

// checkPreconditions evaluates request preconditions and reports whether a precondition
// resulted in sending StatusNotModified or StatusPreconditionFailed.
func checkPreconditions(w ResponseWriter, r *Request, modtime time.Time) (done bool, rangeHeader string) {

				return
			}

			okSt := (ci.StatusCode == http.StatusOK || ci.StatusCode == http.StatusPartialContent ||
				ci.StatusCode == http.StatusPreconditionFailed || ci.StatusCode == http.StatusNotModified)
			if okSt {
				ci.WriteHeaders(w, func() {
					// set common headers
					setCommonHeaders(w)
				}, func() {
					okSt := (ci.StatusCode == http.StatusOK || ci.StatusCode == http.StatusPartialContent)

	c.Assert(err, nil)
	// Since the "If-Modified-Since" header was ahead in time compared to the actual
	// modified time of the object expecting the response status to be http.StatusNotModified.
	c.Assert(response.StatusCode, http.StatusNotModified)

	// Again, obtain the object info.
	// This time setting "If-Unmodified-Since" to a time after the object is modified.

func Test304Responses(t *testing.T) { run(t, test304Responses) }
func test304Responses(t *testing.T, mode testMode) {
	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		w.WriteHeader(StatusNotModified)
		_, err := w.Write([]byte("illegal body"))
		if err != ErrBodyNotAllowed {
			t.Errorf("on Write, expected ErrBodyNotAllowed, got %v", err)
		}
	}))
	defer cst.close()
	res, err := cst.c.Get(cst.ts.URL)