private async Task <TResponse> PerformHttp <TRequest, TResponse>(string path, HttpMethod method, TRequest requestBody, CancellationToken token) where TResponse : class
{
HttpClient httpClient = _httpClientProducer.CreateClient();
using HttpRequestMessage req = new HttpRequestMessage(method, path);
if (requestBody != null)
{
req.Content = new JsonContent <TRequest>(_serializer, requestBody);
}
// Login if needed, then sign the request
await _requestSigner.LoginIfNeeded(this, token);
await _requestSigner.Sign(httpClient, req, token);
// Issue the request
using HttpResponseMessage resp = await httpClient.SendAsync(req, HttpCompletionOption.ResponseContentRead, token);
if (resp.Content.Headers.ContentType.MediaType != "application/json")
{
throw new Exception($"API request did not result in a Json object. Path: '{path}'.");
}
if (_logger.IsEnabled(LogLevel.Trace))
{
// Log request / Response
// Note: It should be fine to read the content twice, as HttpCompletionOption.ResponseContentRead is set
string responseBody = await resp.Content.ReadAsStringAsync();
_logger.LogTrace("Received {Code} for {Path}, with body: {Body}", resp.StatusCode, req.RequestUri, responseBody);
}
JObject obj = Parse <JObject>(await resp.Content.ReadAsStreamAsync());
if (obj.ContainsKey("errorMessage") /* && obj.ContainsKey("errorType")*/)
{
// This is an error, regardless of what the status code is
throw new Exception($"API responded with an error: {obj.Value<string>("errorMessage")}. Path: '{path}'.");
}
if (resp.StatusCode == HttpStatusCode.OK)
{
return(obj.ToObject <TResponse>());
}
// Something is wrong, try fetching a message
if (obj.TryGetValue("errorMessage", out JToken errorMsg) || obj.TryGetValue("message", out errorMsg))
{
throw new Exception($"API resulted in a non-success status code. Message: {errorMsg}. Path: '{path}'.");
}
throw new Exception($"API resulted in a non-success status code. No futher details available. Path: '{path}'.");
}
/// <inheritdoc />
protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
await _requestSigner.Sign(request).ConfigureAwait(false);
return(await base.SendAsync(request, cancellationToken).ConfigureAwait(false));
}