public async Task <ActionResult <int> > PostPostItem(Post post)
{
var serializer = new DataContractJsonSerializer(typeof(List <Post>));
// send new post to backend
MemoryStream s = new MemoryStream();
serializer.WriteObject(s, post);
string stringData = System.Text.Encoding.UTF8.GetString(s.ToArray());
var contentData = new StringContent(stringData, System.Text.Encoding.UTF8, "application/json");
var response = await client.PostAsync("http://backend/v1/post", contentData);
// update top words
var postStream = await client.GetStreamAsync("http://backend/v1/post");
var posts = serializer.ReadObject(postStream) as List <Post>;
TextAnalyzer.AnalyseTextAndUpdateCache(posts, _cache);
return(0);
}