使用ValidateAntiforgerytoken的.net Core 2.0 Web API 400错误 [英] .net Core 2.0 web api 400 error using Validateantiforgerytoken

问题描述

我有两个.Net Core应用程序，一个Web API和一个Client.使用以下命令从客户端发送帖子:

I have two .Net Core applications, a Web API and Client. Sending Post from the client using :

<form asp-action="Create" method="post">
     @Html.AntiForgeryToken()
     .....
</form>

客户端控制器:

public async Task<IActionResult> Create([Bind("QuestionId,TheQuestion")] SecurityQuestion securityQuestion)
{
    _session.SetString(SessionsKeys.Directory, "/SecurityQuestions");
    if (ModelState.IsValid)
    {
        var data = await _theService.PostWebApi(securityQuestion);
        if (data.Item3 == "True")
        {
            return RedirectToAction(nameof(Index));
        }
        return View(data.Item1);
    }
    return View(securityQuestion);
}

与Web API通信的方法:

Method to communicate with the Web API:

public async Task<(object, string, string)> PostWebApi(TObject model)
{
    var dir = _session.GetString(SessionsKeys.Directory);
    using (HttpClient client = new HttpClient())
    {
        client.BaseAddress = new Uri(_webApiData.WebApiitems.Url);
        MediaTypeWithQualityHeaderValue contentType = new MediaTypeWithQualityHeaderValue("application/json");
        client.DefaultRequestHeaders.Accept.Add(contentType);
        string stringData = JsonConvert.SerializeObject(model);
        var contentData = new StringContent(stringData, System.Text.Encoding.UTF8, "application/json");
        HttpResponseMessage response = client.PostAsync(dir + "/", contentData).Result;
        var msg = await response.Content.ReadAsStringAsync();
        var theresponse = response.IsSuccessStatusCode.ToString();
        return (model,msg,theresponse);
    }
}

Web API控制器:

Web API Controller:

[HttpPost]
[ValidateAntiForgeryToken]
public async Task<IActionResult> PostSecurityQuestion([FromRoute] SecurityQuestion securityQuestion)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }
    _context.SecurityQuestion.Add(securityQuestion);
    await _context.SaveChangesAsync();
    return CreatedAtAction("GetSecurityQuestion", new { id = securityQuestion.QuestionId }, securityQuestion);
}

如果我删除了 [ValidateAntiForgeryToken] ，它会起作用.我还尝试删除了 [Form] ，但仍然出现400错误.

If I remove [ValidateAntiForgeryToken], it works. I also tried to remove [Form], still I get 400 error.

我是否缺少启动配置中的其他任何设置?

Am I missing any additional settings in the Startup configurations?

推荐答案

防伪令牌用于确保客户提交的表单与您签发的表单相同-即，它不是伪造的.

Anti-forgery tokens are used to ensure the form your client submits is the form you issued it---that is, it is not forged.

在您的情况下，您的客户端应用正在通过 @ Html.AntiForgeryToken()生成自己的防伪令牌.但是，它不会传递给您创建的用于与Web API对话的 HttpClient .但是，即使您设法将该防伪令牌传递到Web API，由于它不是由Web API发行的，也很可能会被拒绝.

In your case, your client app is generating its own anti-forgery token via the @Html.AntiForgeryToken(). But then, it does not get passed to the HttpClient you create to talk to your Web API. But even if you manage to pass that anti-forgery token to your Web API, it will likely be rejected since it was not issued by the Web API.

您应该更改Web API，以允许客户端获取令牌.这是斯科特·艾伦(Scott Allen)的博客，介绍如何做到这一点:

You should change your Web API to allow your client to get a token. Here is a blog by Scott Allen on how you can do that:

• 查看全文