邮递员将错误的整数值传递给 API 控制器

Question

我在邮递员中发现了一个奇怪的问题。在下面的请求金额是整数字段。

{ "merchantId": 49, "amount": 020 }

当我通过数量 020 而不是 20 时。在 API 控制器中，我收到数量 16。当我通过 0100 时，我收到 64。

如果我传入像“020”或“0100”这样的双引号。然后我得到 20 和 100。

下面是控制器方法和请求类：

    [HttpPost]
    public IHttpActionResult Post(XXXXXXXXCommand command)
    {
        IHttpActionResult result = null;

        using (_logger.PushWeb())
        {
            _logger.Info("POST request to /transactions/debits/accountsetup", command);
            try
            {

            }

            catch (MerchantNotFoundException ex)
            {
                _logger.Error("XXXX", ex);


            }

        }
        return result;
    }


[DataContract(Name = "XXXXCommand")]
public class XXXXXXCommand : CommandBase
{
    /// <summary>
    /// Merchant ID 
    /// </summary>
    [DataMember(Name = "merchantId", Order = 1)]
    public int MerchantId { get; set; }

    /// <summary>
    /// Transaction amount
    /// </summary>
    [DataMember(Name = "amount", Order = 2)]
    public int Amount { get; set; }
}

它看起来像邮递员错误。

Answer 1

Prefixing a number with 0 makes it interpreted as an octal number.

Octal number syntax uses a leading zero. If the digits after the 0 are outside the range 0 through 7, the number will be interpreted as a decimal number.

var n = 0755; // 493
var m = 0644; // 420

For more information see this link.