为什么我得到411长度所需错误？ [英] Why I get 411 Length required error?

问题描述

这是我如何调用使用.NET服务：

This is how I call a service with .NET:

var requestedURL = "https://accounts.google.com/o/oauth2/token?code=" + code + "&client_id=" + client_id + "&client_secret=" + client_secret + "&redirect_uri=" + redirect_uri + "&grant_type=authorization_code";
HttpWebRequest authRequest = (HttpWebRequest)WebRequest.Create(requestedURL);
authRequest.ContentType = "application/x-www-form-urlencoded";
authRequest.Method = "POST";
WebResponse authResponseTwitter = authRequest.GetResponse();

但调用此方法时，我得到：

but when this method is invoked, I get:

异常详细信息：System.Net.WebException：远程服务器返回
错误：（411）所需的长度

Exception Details: System.Net.WebException: The remote server returned an error: (411) Length Required.

我应该怎么办？

推荐答案

当你使用HttpWebRequest和POST方法，你必须通过RequestStream（如果你喜欢或身体）设置内容。但是，根据你的代码，使用authRequest.Method =GET应该够了。

When you're using HttpWebRequest and POST method, you have to set a content (or a body if you prefer) via the RequestStream. But, according to your code, using authRequest.Method = "GET" should be enough.

在如果你想知道关于POST格式，这里是你必须做的事

In case you're wondering about POST format, here's what you have to do :

ASCIIEncoding encoder = new ASCIIEncoding();
byte[] data = encoder.GetBytes(serializedObject); // a json object, or xml, whatever...

HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/json";
request.ContentLength = data.Length;
request.Expect = "application/json";

request.GetRequestStream().Write(data, 0, data.Length);

HttpWebResponse response = request.GetResponse() as HttpWebResponse;

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