Func <HttpClient, CancellationToken, object[], Task <T> > BuildCancellableTaskFuncForMethod <T>(RestMethodInfo restMethod)
{
return(async(client, ct, paramList) => {
if (client.BaseAddress == null)
{
throw new InvalidOperationException("BaseAddress must be set on the HttpClient instance");
}
var factory = BuildRequestFactoryForMethod(restMethod.Name, client.BaseAddress.AbsolutePath, restMethod.CancellationToken != null);
var rq = factory(paramList);
HttpResponseMessage resp = null;
var disposeResponse = true;
try
{
resp = await client.SendAsync(rq, HttpCompletionOption.ResponseHeadersRead, ct).ConfigureAwait(false);
if (restMethod.SerializedReturnType == typeof(HttpResponseMessage))
{
disposeResponse = false; // caller has to dispose
// NB: This double-casting manual-boxing hate crime is the only way to make
// this work without a 'class' generic constraint. It could blow up at runtime
// and would be A Bad Idea if we hadn't already vetted the return type.
return (T)(object)resp;
}
if (!resp.IsSuccessStatusCode)
{
disposeResponse = false;
throw await ApiException.Create(rq.RequestUri, restMethod.HttpMethod, resp, restMethod.RefitSettings).ConfigureAwait(false);
}
if (restMethod.SerializedReturnType == typeof(HttpContent))
{
disposeResponse = false; // caller has to clean up the content
return (T)(object)resp.Content;
}
if (restMethod.SerializedReturnType == typeof(Stream))
{
disposeResponse = false; // caller has to dispose
return (T)(object)await resp.Content.ReadAsStreamAsync().ConfigureAwait(false);
}
using (var stream = await resp.Content.ReadAsStreamAsync().ConfigureAwait(false))
using (var reader = new StreamReader(stream))
{
if (restMethod.SerializedReturnType == typeof(string))
{
return (T)(object)await reader.ReadToEndAsync().ConfigureAwait(false);
}
using (var jsonReader = new JsonTextReader(reader))
{
return serializer.Deserialize <T>(jsonReader);
}
}
}
finally
{
// Ensure we clean up the request
// Especially important if it has open files/streams
rq.Dispose();
if (disposeResponse)
{
resp?.Dispose();
}
}
});
}
ValidationApiException(ApiException apiException) :
base(apiException.RequestMessage, apiException.HttpMethod, apiException.StatusCode, apiException.ReasonPhrase, apiException.Headers, apiException.RefitSettings)
{
}
Func <HttpClient, CancellationToken, object[], Task <T> > BuildCancellableTaskFuncForMethod <T, TBody>(RestMethodInfo restMethod)
{
return(async(client, ct, paramList) =>
{
if (client.BaseAddress == null)
{
throw new InvalidOperationException("BaseAddress must be set on the HttpClient instance");
}
var factory = BuildRequestFactoryForMethod(restMethod, client.BaseAddress.AbsolutePath, restMethod.CancellationToken != null);
var rq = await factory(paramList).ConfigureAwait(false);
HttpResponseMessage resp = null;
HttpContent content = null;
var disposeResponse = true;
try
{
resp = await client.SendAsync(rq, HttpCompletionOption.ResponseHeadersRead, ct).ConfigureAwait(false);
content = resp.Content ?? new StringContent(string.Empty);
if (restMethod.SerializedReturnType == typeof(HttpResponseMessage))
{
disposeResponse = false; // caller has to dispose
// NB: This double-casting manual-boxing hate crime is the only way to make
// this work without a 'class' generic constraint. It could blow up at runtime
// and would be A Bad Idea if we hadn't already vetted the return type.
return (T)(object)resp;
}
if (!resp.IsSuccessStatusCode)
{
disposeResponse = false;
var exception = await ApiException.Create(rq, restMethod.HttpMethod, resp, restMethod.RefitSettings).ConfigureAwait(false);
if (restMethod.IsApiResponse)
{
return ApiResponse.Create <T>(resp, default(T), exception);
}
throw exception;
}
var serializedReturnType = restMethod.IsApiResponse ? restMethod.SerializedGenericArgument : restMethod.SerializedReturnType;
if (serializedReturnType == typeof(HttpContent))
{
disposeResponse = false; // caller has to clean up the content
if (restMethod.IsApiResponse)
{
return ApiResponse.Create <T>(resp, content);
}
return (T)(object)content;
}
if (serializedReturnType == typeof(Stream))
{
disposeResponse = false; // caller has to dispose
var stream = (object)await content.ReadAsStreamAsync().ConfigureAwait(false);
if (restMethod.IsApiResponse)
{
return ApiResponse.Create <T>(resp, stream);
}
return (T)stream;
}
if (serializedReturnType == typeof(string))
{
using (var stream = await content.ReadAsStreamAsync().ConfigureAwait(false))
using (var reader = new StreamReader(stream))
{
var str = (object)await reader.ReadToEndAsync().ConfigureAwait(false);
if (restMethod.IsApiResponse)
{
return ApiResponse.Create <T>(resp, str);
}
return (T)str;
}
}
var body = await serializer.DeserializeAsync <TBody>(content);
if (restMethod.IsApiResponse)
{
return ApiResponse.Create <T>(resp, body);
}
// Unfortunate side-effect of having no 'class' or 'T : TBody' constraints.
// However, we know that T must be the same as TBody because IsApiResponse != true so
// this code is safe at runtime.
return (T)(object)body;
}
finally
{
// Ensure we clean up the request
// Especially important if it has open files/streams
rq.Dispose();
if (disposeResponse)
{
resp?.Dispose();
content?.Dispose();
}
}
});
}
internal static T Create <T>(HttpResponseMessage resp, object content, ApiException error = null)
{
return((T)Activator.CreateInstance(typeof(T), resp, content, error));
}
/// <summary>
/// Creates a new instance of a ValidationException from an existing ApiException.
/// </summary>
/// <param name="exception">An instance of an ApiException to use to build a ValidationException.</param>
/// <returns>ValidationApiException</returns>
public static ValidationApiException Create(ApiException exception)
{
return(new ValidationApiException(exception));
}