BadRequest 自定义错误消息未返回给客户端？

Question

我正在开发 Web API 2 应用程序，并且正在实施请求验证。我包含了一个验证检查，如下所示：

if (string.IsNullOrEmpty(userCredentials.UserName))
    return BadRequest("UserCredentials.UserName is required");

按预期返回了 400 响应代码，但提供的消息似乎未包含在返回给客户端的响应中。我是不是在实现中遗漏了一些东西，或者我是否需要一种特殊的方式来处理客户端收到的响应？

更新

BadRequest 消息返回给 Postman，但是当我通过控制台应用程序使用 C# 调用它时，我找不到验证消息。这是我在控制台应用程序中使用的代码：

static async Task<User> Authenticate(string domain, string userName, string password)
{
    using (var client = GetHttpClient())
    {
        var encoding = Encoding.GetEncoding("iso-8859-1");
        var userName64 = Convert.ToBase64String(encoding.GetBytes(userName));
        var password64 = Convert.ToBase64String(encoding.GetBytes(password));
        var credentials = new { DomainName = domain, UserName = userName64 /*, Password = password64*/ };
        var response = await client.PostAsJsonAsync("api/v1/auth", credentials);
        var user = await response.Content.ReadAsAsync<User>();
        return user;
        //return response.Content.ReadAsAsync<User>();
    }
}

Answer 1

您没有检查不良反应。您似乎假设所有响应都是 200，因为您没有检查，只是尝试将响应内容解析为您的 return 类型。

//...

var response = await client.PostAsJsonAsync("api/v1/auth", credentials);
if(response.IsSuccessStatusCode) { // If 200 OK
    //parse response body to desired
    var user = await response.Content.ReadAsAsync<User>();
    return user;
} else {
    //Not 200. You could also consider checking for if status code is 400
    var message = await response.Content.ReadAsStringAsync();
    //Do something with message like
    //throw new Exception(message);
}

//...

Answer 2

using(var response = await client.PostAsJsonAsync("api/v1/auth", credentials)){
    if(response.IsSuccessStatusCode) { 
        //This Code is Executed in Case of Success
        var user = await response.Content.ReadAsAsync<User>();
        return user;
    } 
    else {
        //This Code is Executed in Case of In Case of Other Than Success
        var message = await response.Content.ReadAsStringAsync();
    }
}

You Can use this refactored code, If you want to catch the error message in case of bad request or NotFound etc.

BadRequest 自定义错误消息未返回给客户端？

BadRequest custom error message not returned to client?

.net

c#

asp.net-web-api

asp.net-web-api2