c# - 收到此错误 : "The remote server returned an error: (422) Unprocessable Entity." when doing post from C# to RoR

Question

此代码用于 outlook 插件。我们正在尝试 POST 到一个页面并收到此错误:

The remote server returned an error: (422) Unprocessable Entity.

C#代码在这里:

webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
        ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding();
        Byte[] postData = asciiEncoding.GetBytes("email=e2@email.com&password=hunter2");
        char[] resultHTML = asciiEncoding.GetChars(webClient.UploadData("http://url", "POST", postData));
        string convertedResultHTML = new string(resultHTML);

知道是什么原因造成的吗？

Answer 1

如果您发送的字符不在 ASCII 范围内，则 POST 数据必须在作为 ASCII 发送出去之前进行编码。你应该尝试这样的事情:

Byte[] postData = asciiEncoding.GetBytes(HttpUtility.UrlEncode("email=e2@email.com&password=hunter2"));