public static BadRequestObjectResult ValidationError <T>(this HttpResponseBody <T> responseBody)
{
var problem = new ValidationProblemDetails {
Title = "Validation failed",
Detail = "One or more properties do not have expected values.",
Type = "https://alanta.nl/error/input-invalid",
Status = 400
};
foreach (var validation in responseBody.ValidationResults)
{
problem.Errors.Add(string.Join(", ", validation.MemberNames), new [] { validation.ErrorMessage });
}
var error = new BadRequestObjectResult(problem);
error.ContentTypes.Add("application/problem+json");
return(error);
}
/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="request"></param>
/// <returns></returns>
public static async Task <HttpResponseBody <T> > GetBodyAsync <T>(this HttpRequest request)
{
var body = new HttpResponseBody <T>();
var bodyString = await request.ReadAsStringAsync();
if (bodyString?.Length == 0)
{
body.IsValid = false;
body.ValidationResults = new List <ValidationResult>()
{
new ValidationResult("Request was empty")
};
}
body.Value = JsonConvert.DeserializeObject <T>(bodyString);
var results = new List <ValidationResult>();
body.IsValid = Validator.TryValidateObject(body.Value !, new ValidationContext(body.Value !, null, null),
results, true);
body.ValidationResults = results;
return(body);
}
/// <summary>
/// Attempts to bind a form collection to a model of type <typeparamref name="T" />.
/// </summary>
/// <typeparam name="T">The model type. Must have a public parameterless constructor.</typeparam>
/// <param name="form">The form data to bind.</param>
/// <param name="request">The request.</param>
/// <returns>A new instance of type <typeparamref name="T" /> containing the form data.</returns>
public static async Task <HttpResponseBody <T> > GetFormAsync <T>(this HttpRequest request) where T : new()
{
// based on https://stackoverflow.com/a/60284398/64096
var body = new HttpResponseBody <T>();
var form = await request.ReadFormAsync();
if (form == null || form?.Count == 0)
{
body.IsValid = false;
body.ValidationResults = new List <ValidationResult>()
{
new ValidationResult("Request was empty")
};
}
var props = typeof(T).GetProperties().ToDictionary(p => p.Name, StringComparer.OrdinalIgnoreCase);
var instance = body.Value = Activator.CreateInstance <T>();
foreach (var key in form !.Keys)
{
if (!props.TryGetValue(key, out var prop) || !prop.CanWrite)
{
continue;
}
// assuming single values and primitive values only
var value = form[key].FirstOrDefault();
prop.SetValue(instance, Convert.ChangeType(value, prop.PropertyType));
}
var results = new List <ValidationResult>();
body.IsValid = Validator.TryValidateObject(body.Value !, new ValidationContext(body.Value !, null, null),
results, true);
body.ValidationResults = results;
return(body);
}
