javascript - 为什么我收到此请求的 415

Question

我有一个 Controller ，

[Route("api/[controller]")]
public class ResponsesController : Controller
{
    [HttpPost]
    public void Data([FromBody] MyModel value)
    {
        var temp = value;
    }
}

[JsonObject]
[Serializable]
public class MyModel
{
    public string Url { get; set; }
}

我正在使用 chrome 开发者控制台像这样发帖，

function post_to_url(path, params, method) {
    method = method || "post";

    var form = document.createElement("form");

    //Move the submit function to another variable
    //so that it doesn't get overwritten.
    form._submit_function_ = form.submit;

    form.setAttribute("Content-Type", "application/json;charset=utf-8");
    form.setAttribute("method", method);
    form.setAttribute("action", path);

    for(var key in params) {
        var hiddenField = document.createElement("input");
        hiddenField.setAttribute("type", "hidden");
        hiddenField.setAttribute("name", key);
        hiddenField.setAttribute("value", params[key]);

        form.appendChild(hiddenField);
    }

    document.body.appendChild(form);
    form._submit_function_(); //Call the renamed function.
}
var j = {"Url":"hello"};
post_to_url("http://localhost:63984/api/responses", j );

我收到的错误是 415，但我不确定出了什么问题，我实际上想接收 myModel[]

Answer 1

来自 MDN

In a POST request, resulting from an HTML form submission, the Content-Type of the request is specified by the enctype attribute on the element.

您应该从 post_to_url 中删除 form.setAttribute("Content-Type", "application/json;charset=utf8")。如果您要以这种方式提交数据，您可能必须将服务配置为接受 url 编码的表单数据。对于这么简单的事情，它可能开箱即用。