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HttpClient.SendAsync() returns status code 200 even if the remote server is down

A simple login method that works just fine until I shut down my API. Then the try-catch block acts as intended, and an exception is thrown and caught but, _response comes out with a status code of "200, OK". For the love of me, I can't figure out why. Please help!
The code looks so bad mainly because of all the patching and testing I am doing on it to figure out what is happening.
HttpResponseMessage response = null;
public async Task<HttpResponseMessage> login(AuthModel model)
{
HttpResponseMessage response = null;
model.responseMessage = "";
var client = new HttpClient();
string text = "{\"email\": \""+model.email+"\",\"password\": \""+model.password+"\"}";
var request = new HttpRequestMessage
{
Method = HttpMethod.Post,
RequestUri = new Uri(_baseURL+"/api/user/login"),
Content = new StringContent(text, Encoding.UTF8, "application/json")
};
try
{
using (response = await client.SendAsync(request))
{
HttpResponseMessage _response = null;
//response.EnsureSuccessStatusCode();
if (response.IsSuccessStatusCode)
{
//_response = response;
var body = await response.Content.ReadAsStringAsync();
var token = response.Headers.GetValues("auth-token").FirstOrDefault();
model.authToken = token;
model.name = body;
model.responseMessage = "Congratulations!";
return _response;
}
else
{
model.name = "";
model.responseMessage = await response.Content.ReadAsStringAsync();
return _response;
}
}
}
catch(Exception e) {
// model.responseMessage = e.Message;
return _response;
}
}

using "HttpResponseMessage _response = new HttpResponseMessage();" was setting the _response.StatusCode to be as "200" and the code was not dealing with that.

API Works in Postman but while hitting from code no response is generated

I have Get API for getting data, when it is hitting from Postman it gives response properly,
but while hitting from the code it skipping the code. I am using HttpClient().
My code for hitting the api is below :
I didn't get the point here why this happening.
public async Task<string> GetAsync(string uri, string serverAddress = "")
{
try
{
string id = System.DateTime.Now.ToString("hhmmss");
HttpClient httpClient = new HttpClient();
httpClient.Timeout = new TimeSpan(0, 0, 0, 0, Timeout);
httpClient.BaseAddress = new Uri(serverAddress);
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/xml"));
var responseMessage = await httpClient.GetAsync(new Uri(uri));
var responseContent = await responseMessage.Content.ReadAsStringAsync();
if (!responseMessage.IsSuccessStatusCode)
{
throw new RestException
{
ResponseCode = (int)responseMessage.StatusCode,
ResponseContent = responseContent
};
}
return responseContent;
}
catch (Exception ex)
{
throw new Exception($"The Get request timed out. Exception :- {ex.Message}");
}
}
From this line -->
var responseMessage = await httpClient.GetAsync(new Uri(uri));
my code is skipping
Edit -->
After Testing more, I also got no exception after the timeout.

comment below line in your code
httpClient.BaseAddress = new Uri(serverAddress);
and pass full url instead of new Uri(uri) in below line
var responseMessage = await httpClient.GetAsync(new Uri(uri));

Try the following:
public async Task<string> GetAsync(string uri, string serverAddress = "")
{
try
{
string id = System.DateTime.Now.ToString("hhmmss");
HttpClient httpClient = new HttpClient();
httpClient.Timeout = new TimeSpan(0, 0, 0, 0, Timeout);
httpClient.BaseAddress = new Uri(serverAddress);
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/xml"));
var responseMessage = await httpClient.GetAsync(uri);
var responseContent = await responseMessage.Content.ReadAsStringAsync();
if (!responseMessage.IsSuccessStatusCode)
{
throw new RestException
{
ResponseCode = (int)responseMessage.StatusCode,
ResponseContent = responseContent
};
}
return responseContent;
}
catch (Exception ex)
{
throw new Exception($"The Get request timed out. Exception :- {ex.Message}");
}
}
Ensure you add await before calling this method in your code and check if the full URL that's actually called has been build correctly. You can just pass a string into the GetAsync() method, no need to create a new URI.

StatusCode: 405, ReasonPhrase: 'Method Not Allowed' while using POST METHOD

I keep getting this error when trying to use POST Method.
I need to get from the API a list of certificates into a LIST, I know that "lista" is null right now, since I can´t get the API to bring me the lists yet.
public async Task<List<Certificaciones>> grillaCertificadosAsync(int id)
{
List<Certificaciones> lista = new List<Certificaciones>();
var cert = new jsonCert()
{
idProyecto = id
};
var id1 = JsonConvert.SerializeObject(cert);
var content = new StringContent(id1, Encoding.UTF8, "application/json");
content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var result = await client.PostAsync("https://certificacionesbuho.mendoza.gov.ar/api/BuhoBlanco/GetInfoCert", content);
var responseBody = await result.Content.ReadAsStringAsync().ConfigureAwait(false);
return lista;
This is the API.
[Route("Api/BuhoBlanco/GetInfoCert")]
[System.Web.Http.ActionName("GetInfoCert")]
[System.Web.Http.HttpPost]
public Respuesta GetInfoCert([FromBody]infoCertRequest infoCert)
{
Respuesta rta = new Respuesta();
try
{
BuhoServicio.ServicioBuhoBlanco _servicio = new BuhoServicio.ServicioBuhoBlanco();
rta.Exito = true;
rta.StatusCode = HttpStatusCode.OK;
rta.Data = _servicio.infoCertificados(infoCert.idProyecto);
//((IDisposable)_servicio).Dispose();
return rta;
}
catch (Exception ex)
{
rta.Error = ex.Message;
rta.Exito = false;
rta.StatusCode = HttpStatusCode.InternalServerError;
return rta;
}
}

IMHO route should be like this
[HttpPost("~/Api/BuhoBlanco/GetInfoCert")]
public Respuesta GetInfoCert([FromBody]infoCertRequest infoCert)

HttpClient.PostAsJsonAsync crushed without exception

I am trying to call an api(POST method) with HttpClient.PostAsJsonAsync. However, it stopped at httpClient.PostAsJsonAsync without any exception.
The source code as below:
public static async Task<oResult> PostApi(string JSON_sObject, string sEnd_Url) {
oResult oResult = new oResult();
var Data = JsonConvert.DeserializeObject(JSON_sObject);
var Url = "http://localhost:44340/" + sEnd_Url;
HttpClient httpClient = new HttpClient();
try {
httpClient.DefaultRequestHeaders.Accept.Clear();
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
HttpResponseMessage response = await httpClient.PostAsJsonAsync(new Uri(Url), Data); // it stopped here
if (response.IsSuccessStatusCode)
{
var sResponse_content = await response.Content.ReadAsStringAsync();
return JsonConvert.DeserializeObject<oResult>(sResponse_content);
}
else
{
return oResult;
}
}
catch (Exception ex)
{
LogFile(ex);
return oResult;
}
}
Please advice me if any issue from the source code.
Thank you

you should not trying serialize deserialize twice
remove from your code
var Data = JsonConvert.DeserializeObject(JSON_sObject);
and replace
HttpResponseMessage response = await httpClient.PostAsJsonAsync(new Uri(Url), Data);
with this
var content = new StringContent(JSON_sObject, Encoding.UTF8, "application/json");
var response = await client.PostAsync(sEnd_Url, content);
also fix base httpclient address
var baseUri= #"http://localhost:44340";
using HttpClient client = new HttpClient { BaseAddress = new Uri(baseUri) };
try {

why await does not wait untill httpclient postasync complets?

Im creating http client for consume some api.
Here is my client method calling to api endpoint.
public async Task<HttpResponseMessage> SendRequestAsync()
{
string adaptiveUri = "https://some-api/api/Authentication/AuthenticateThirdPartyUserAsync";
using (HttpClient httpClient = new HttpClient())
{
var json = JsonConvert.SerializeObject(new { userName = "uname", password = "123", applicantCode = "hello" });
var payload = new StringContent(json, Encoding.UTF8, "application/json");
HttpResponseMessage responseMessage = null;
try
{
responseMessage = await httpClient.PostAsync(adaptiveUri, payload);
}
catch (Exception ex)
{
if (responseMessage == null)
{
responseMessage = new HttpResponseMessage();
}
responseMessage.StatusCode = HttpStatusCode.InternalServerError;
responseMessage.ReasonPhrase = string.Format("RestHttpClient.SendRequest failed: {0}", ex);
}
return responseMessage;
}
}
calling method is as follows
public async Task<IBaseStatus> Handle(InspectionAddedEvent domainEvent)
{
var tk = await _iAClient.SendRequestAsync();
return something;
}
but await does not wait untill postasync completes.
but when i use
httpClient.PostAsync(adaptiveUri, payload).GetAwaiter().GetResult()
it waits until post is complets.
can anyone have idea about this?
Thanks.

await _iAClient.SendRequestAsync(); definitely waits for the PostAsync.
I think the problem is that your are receiving an exception in SendRequestAsync and confuse the result.
Remove completely the try/carch block
public async Task<HttpResponseMessage> SendRequestAsync()
{
string adaptiveUri ="https://someapi/api/Authentication/AuthenticateThirdPartyUserAsync";
using (HttpClient httpClient = new HttpClient())
{
var json = JsonConvert.SerializeObject(new { userName = "uname", password = "123", applicantCode = "hello" });
var payload = new StringContent(json, Encoding.UTF8, "application/json");
return await httpClient.PostAsync(adaptiveUri, payload);
}
}
And try to catch it in the caller:
public async Task<IBaseStatus> Handle(InspectionAddedEvent domainEvent)
{
try
{
var tk = await _iAClient.SendRequestAsync();
return something;
}
catch(Exception ex)
{
//Probably return some IBaseStatus
}
}