chore(errorHandler):new abortWithStatus method with Json body (#800)

context.go

@@ -120,6 +120,13 @@ func (c *Context) AbortWithStatus(code int) {
 	c.Abort()
 }
 
+// AbortWithStatusJSON calls `Abort()` and then `JSON` internally. This method stops the chain, writes the status code and return a JSON body
+// It also sets the Content-Type as "application/json".
+func (c *Context) AbortWithStatusJSON(code int, jsonObj interface{}) {
+	c.Abort()
+	c.JSON(code, jsonObj)
+}
+
 // AbortWithError calls `AbortWithStatus()` and `Error()` internally. This method stops the chain, writes the status code and
 // pushes the specified error to `c.Errors`.
 // See Context.Error() for more details.

context_test.go

@@ -788,6 +788,36 @@ func TestContextAbortWithStatus(t *testing.T) {
 	assert.True(t, c.IsAborted())
 }
 
+type testJSONAbortMsg struct {
+	Foo string `json:"foo"`
+	Bar string `json:"bar"`
+}
+
+func TestContextAbortWithStatusJSON(t *testing.T) {
+	w := httptest.NewRecorder()
+	c, _ := CreateTestContext(w)
+	c.index = 4
+
+	in := new(testJSONAbortMsg)
+	in.Bar = "barValue"
+	in.Foo = "fooValue"
+
+	c.AbortWithStatusJSON(415, in)
+
+	assert.Equal(t, c.index, abortIndex)
+	assert.Equal(t, c.Writer.Status(), 415)
+	assert.Equal(t, w.Code, 415)
+	assert.True(t, c.IsAborted())
+
+	contentType := w.Header().Get("Content-Type")
+	assert.Equal(t, contentType, "application/json; charset=utf-8")
+
+	buf := new(bytes.Buffer)
+	buf.ReadFrom(w.Body)
+	jsonStringBody := buf.String()
+	assert.Equal(t, fmt.Sprint(`{"foo":"fooValue","bar":"barValue"}`), jsonStringBody)
+}
+
 func TestContextError(t *testing.T) {
 	c, _ := CreateTestContext(httptest.NewRecorder())
 	assert.Empty(t, c.Errors)