public static void SelectFields_Should_Throws_Exception_When_Param_Is_Null()
{
// act & assert
Assert.Throws <ArgumentNullException>(() => JsonFieldSelectorExtension.SelectFieldsFromObject <object>(null, new string[] { })); // by obj
Assert.Throws <ArgumentNullException>(() => JsonFieldSelectorExtension.SelectFieldsFromJToken(null, new string[] { })); // by jtoken
Assert.Throws <ArgumentNullException>(() => JsonFieldSelectorExtension.SelectFieldsFromString(null, new string[] { })); // by string
}
public async Task Invoke(HttpContext context)
{
await this.Next(context);
if (context.Request.Query.Any(r => r.Key.ToLowerInvariant() == this.PropertyName))
{
var json = context.Response.Body.AsString();
if (string.IsNullOrWhiteSpace(json))
{
return;
}
try
{
var fields = context.Request.Query
.FirstOrDefault(r => r.Key.ToLowerInvariant() == this.PropertyName)
.Value.ToString();
if (string.IsNullOrWhiteSpace(fields))
{
json = "{ }";
}
else
{
json = JsonFieldSelectorExtension.SelectFieldsFromString(json, fields);
}
}
catch
{
json = "{ }";
}
var length = Encoding.UTF8.GetBytes(json ?? "").Length;
context.Response.Body.SetLength(length);
context.Response.ContentLength = length;
await context.Response.WriteAsync(json);
}
}
