Extract the application/json mime type into a const

oauthproxy.go

@@ -30,6 +30,8 @@ const (
 	// Cookies are limited to 4kb including the length of the cookie name,
 	// the cookie name can be up to 256 bytes
 	maxCookieLength = 3840
+
+	applicationJSON = "application/json"
 )
 
 // SignatureHeaders contains the headers to be signed by the hmac algorithm
@@ -908,7 +910,7 @@ func (p *OAuthProxy) isAjax(req *http.Request) bool {
 	if !ok {
 		acceptValues = req.Header["Accept"]
 	}
-	const ajaxReq = "application/json"
+	const ajaxReq = applicationJSON
 	for _, v := range acceptValues {
 		if v == ajaxReq {
 			return true
@@ -919,6 +921,6 @@ func (p *OAuthProxy) isAjax(req *http.Request) bool {
 
 // ErrorJSON returns the error code witht an application/json mime type
 func (p *OAuthProxy) ErrorJSON(rw http.ResponseWriter, code int) {
-	rw.Header().Set("Content-Type", "application/json")
+	rw.Header().Set("Content-Type", applicationJSON)
 	rw.WriteHeader(code)
 }

oauthproxy_test.go

@@ -903,35 +903,35 @@ func (test *ajaxRequestTest) getEndpoint(endpoint string, header http.Header) (i
 
 func testAjaxUnauthorizedRequest(t *testing.T, header http.Header) {
 	test := newAjaxRequestTest()
-	const endpoint = "/test"
+	endpoint := "/test"
 
 	code, rh, err := test.getEndpoint(endpoint, header)
 	assert.NoError(t, err)
 	assert.Equal(t, http.StatusUnauthorized, code)
 	mime := rh.Get("Content-Type")
-	assert.Equal(t, "application/json", mime)
+	assert.Equal(t, applicationJSON, mime)
 }
 func TestAjaxUnauthorizedRequest1(t *testing.T) {
 	header := make(http.Header)
-	header.Add("accept", "application/json")
+	header.Add("accept", applicationJSON)
 
 	testAjaxUnauthorizedRequest(t, header)
 }
 
 func TestAjaxUnauthorizedRequest2(t *testing.T) {
 	header := make(http.Header)
-	header.Add("Accept", "application/json")
+	header.Add("Accept", applicationJSON)
 
 	testAjaxUnauthorizedRequest(t, header)
 }
 
 func TestAjaxForbiddendRequest(t *testing.T) {
 	test := newAjaxRequestTest()
-	const endpoint = "/test"
+	endpoint := "/test"
 	header := make(http.Header)
 	code, rh, err := test.getEndpoint(endpoint, header)
 	assert.NoError(t, err)
 	assert.Equal(t, http.StatusForbidden, code)
 	mime := rh.Get("Content-Type")
-	assert.NotEqual(t, "application/json", mime)
+	assert.NotEqual(t, applicationJSON, mime)
 }