/// <summary>
/// Deserialize the content of the HTTP content as a <see cref="MvcProblemDetails" />. Returns <c>Null</c>
/// where there is the content is empty or does not have the ProblemDetails media type
/// </summary>
/// <remarks>
/// A "best-effort" attempt will be made to discover whether to deserialize to a
/// <see cref="ValidationProblemDetails" /> where there is an errors field that has the shape of the
/// <see cref="ValidationProblemDetails.Errors" /> dictionary. Otherwise the content will be
/// deserialized as a <see cref="MvcProblemDetails" /> instance
/// </remarks>
/// <param name="content">The content to deserialize</param>
public static async Task <MvcProblemDetails> ReadAsProblemDetailsAsync(this HttpContent content)
{
if (!content.IsProblemDetails())
{
return(await Task.FromResult <MvcProblemDetails>(null));
}
var rawProblem = await content.ReadAsStringAsync();
if (rawProblem.Contains(ErrorsFieldKey, StringComparison.OrdinalIgnoreCase))
{
ValidationProblemDetails validationProblem = null;
try
{
validationProblem = JsonProblemDetailsConverter.Deserialize <ValidationProblemDetails>(rawProblem);
}
catch (JsonSerializationException)
{
// we're going to fallback so ignore this exception
}
return(validationProblem == null || validationProblem.Errors.Count == 0
// the response wasn't really a ValidationProblemDetails, therefore fallback
? JsonProblemDetailsConverter.Deserialize <MvcProblemDetails>(rawProblem)
: validationProblem);
}
return(JsonProblemDetailsConverter.Deserialize(rawProblem));
}
/// <summary>
/// Deserialize the content of the HTTP content as a <see cref="MvcProblemDetails" />. Returns <c>Null</c>
/// where there is the content is empty or does not have the ProblemDetails media type
/// </summary>
/// <param name="content">The content to deserialize</param>
/// <typeparam name="T">The target type to deserialize</typeparam>
public static async Task <T> ReadAsProblemDetailsAsync <T>(this HttpContent content) where T : MvcProblemDetails
{
if (!content.IsProblemDetails())
{
return(await Task.FromResult <T>(null));
}
var rawProblem = await content.ReadAsStringAsync();
return(JsonProblemDetailsConverter.Deserialize <T>(rawProblem));
}