private static async Task <HttpResponse <T> > InternalGetAsync(HttpResponseMessage response,
bool ensureSuccess, OnSuccessAsync <T> onSuccess, OnFailAsync <T> onFail, Type genericType)
{
var res = new HttpResponse <T>(response);
var content = response.Content;
if (content == null)
{
throw new UnirestRequestException("HttpResponseMessage.Content was null!");
}
if (!res.IsSuccess)
{
if (onFail != null)
{
await onFail(new PartialHttpResponse <T>(res, response));
// we return here to avoid misleading exceptions after executing code when onFail is present; since
// onFinish must also be present we shouldn't "bubble up" the result to the outside, as that voids
// the entire point of using onFail, as it could throw an exception when parsing malformed JSON.
// also, this will make GetAsync dispose the response, which is what we want, since we're finished
// with it.
return(null);
}
if (ensureSuccess)
{
throw new UnirestResponseException <T>(
$"Request failed with status code {res.Code} ({res.CodeType})",
new PartialHttpResponse <T>(res, response));
}
}
if (genericType == typeof(byte[]))
{
res.Body = (T)(object)await content.ReadAsByteArrayAsync();
}
else if (genericType == typeof(string))
{
res.Body = (T)(object)await content.ReadAsStringAsync();
}
else if (genericType == typeof(Stream))
{
res.Body = (T)(object)await content.ReadAsStreamAsync();
}
else
{
res.Body = JsonConvert.DeserializeObject <T>(await content.ReadAsStringAsync());
}
// ReSharper disable once InvertIf
if (res.IsSuccess && onSuccess != null)
{
await onSuccess(res.Body);
// return null here since there's no point keeping the response, so we want GetAsync to dispose it
return(null);
}
return(res);
}
// the value of the Task should always be dropped when onSuccess/onFail are provided!
internal static async Task <HttpResponse <T> > GetAsync(HttpResponseMessage response,
bool ensureSuccess, OnSuccessAsync <T> onSuccess, OnFailAsync <T> onFail)
{
var genericType = typeof(T);
HttpResponse <T> res = null;
try
{
// we need to use await to capture the variable and support finally
res = await InternalGetAsync(response, ensureSuccess, onSuccess, onFail, genericType);
}
finally
{
// if res == null then either the call threw (and there was no result) or it called onSuccess/onFail
// (which return null) so we dispose of the response.
// if res is a type that's not stream, it's already buffered, so we dispose of the response.
// if res is a stream and it isn't using onSuccess/onFail then we want to give the return value access
// to the stream, so we don't want to close the response.
if (genericType == typeof(Stream) && res != null)
{
res._dispose = response;
}
// if ensureSuccess is true, we want the partial response content to be available to the exception
// handler, so don't dispose it in that case
else if (!ensureSuccess)
{
// Content is automatically disposed, see
// dotnet/corefx/blob/8c0487bfeff9229beca93dc480028b83d8e39705/src/System.Net.Http/src/System/Net/Http/HttpResponseMessage.cs#L213
response.Dispose();
}
}
return(res);
}
