XamarinHttpClientHttpResponseMessage-Content --- Getting HTML instead of JSON

Question

HttpClient myClient = new HttpClient();
myClient.BaseAddress = new Uri(URL);

Base address already specified on client it's URL.

var encodedObject = JsonConvert.SerializeObject(Obj);
myClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
HttpResponseMessage response = await myClient.PostAsync("test.php/yourAPI",new StringContent(encodedObject, System.Text.Encoding.UTF8, "application/json"));
if (response.IsSuccessStatusCode)
{
  var responseContent =  response.ToString();
  var responsebody = response.Content.ToString();
  Stream receiveStream = response.GetResponseStream();
  string responseBodyAsText = response.Content.ReadAsStringAsync().Result;
}

In away Yes ! it's not a Public server ! to answer your question — Mohamed Aymen Haddad, Jul 05 '16 at 12:12
In a lot of these cases the server is throwing an error and defaulting to the error page (html). the endpoint you are calling. Is it a web api or normal Asp.Net MVC — Nkosi, Jul 05 '16 at 12:17
I have tested the API with POSTMAN and it's working fine, still it's not the case with Xamarin. Additionnaly "response" get a response code 200 OK but the content is NO JSON it's HTML. I am using a Web API — Mohamed Aymen Haddad, Jul 05 '16 at 12:22
You are probably going to have to show some more details about your setup to get a better assessment of the problem. check how to provide a [mcve] — Nkosi, Jul 05 '16 at 12:38
You say it works with post man. inspect the request being sent by portman and then inspect/compare the request being sent by your code. — Nkosi, Jul 05 '16 at 12:43
thats not all the code. its a snippet. you say the client is created and that base address is added. that is not in the code you showed in the example. Show a complete example so that the code can be used to replicate your problem. At this point others will have to guess what you have before the code you have displayed. you can always replace the url with a fake one. — Nkosi, Jul 05 '16 at 13:01

score 0 · Answer 1 · answered Jul 05 '16 at 12:30

Could be a content negotiation issue. Try clearing the Accept header before adding the json media type

myClient.DefaultRequestHeaders.Accept.Clear();
myClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
//...other code removed for brevity.

this code sets the Accept header to "application/json", which tells the server to send data in JSON format.

Reference source: Calling a Web API From a .NET Client in ASP.NET Web API 2

Already Tried it. Same issue. HTML content instead of JSON Content — Mohamed Aymen Haddad, Jul 05 '16 at 12:36

score 0 · Accepted Answer · answered Jul 06 '16 at 15:08

the Method PostAsync has as first argument the complete URI of The API. Therefore, it should be like follow :

    HttpResponseMessage response = await myClient.PostAsync("http://bla-bla-bla/test.php/test",new StringContent(encodedObject, System.Text.Encoding.UTF8, "application/json"));

And there is no need to define the BaseAddress.

Xamarin__HttpClient__HttpResponseMessage-Content --- Getting HTML instead of JSON

2 Answers2

XamarinHttpClientHttpResponseMessage-Content --- Getting HTML instead of JSON