远程服务器返回错误 (400) Bad Request, status ProtocolError

Question

我在其他类似问题中找不到解决方案。 我收到 The remote server returned an error: (400) Bad Request error while running the following code.

string url = @"http://api.dwaybill.com/" + cid + 
               "/orders.json?v=" + version + "&key=" + key + 
               "&customer_number=" + customer_number + 
               "&password=" + password;

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
UTF8Encoding encoding = new UTF8Encoding();

byte[] bytes1 = encoding.GetBytes(@"{"Here is the json text that i testet and is correct"}");

request.Method = "POST";
request.ContentType = "application/json";
request.ContentLength = bytes1.Length;

using (Stream sendStream = request.GetRequestStream())
{
    sendStream.Write(bytes1, 0, bytes1.Length);
}
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
    using (Stream stream = response.GetResponseStream())
    {
        using (StreamReader reader = new StreamReader(stream))
        {
            html = reader.ReadToEnd();
        }
    }
}
Console.WriteLine(html);

在通过 (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) 获得响应时，我收到 400 Bad Request 错误。

我该如何解决这个问题？我该怎么办？

编辑：这是我试图发出帖子请求的 API：https://github.com/digwaybill/Digital-Waybill-API

Answer 1

似乎错误是因为缺少标题。

请在请求前添加以下标头，格式为：

request.Headers["X-My-Custom-Header"] = "the-value";

对于您的示例，它将是：

request.Headers["Accept"] = " application/json";

请如下更新 JSON 行。 Json 需要一个键和值。随时将name 更新为任何其他字符串。双引号也干扰了字符串格式，必须转义。

byte[] bytes1 = encoding.GetBytes("{\"name\":\"Here is the json text that i testet and is correct\"}");