在C＃中重用与HttpWebRequest的连接 [英] Reuse Connection with HttpWebRequest in C#

问题描述

我需要使用.Net发出POST请求。

I need to make a POST request using .Net.

我可以通过GET进行身份验证，因此我尝试在同一个连接上发出POST请求以保证我的身份验证。

I can authenticate by GET, and so I’m trying to make a POST request on the same connection to keep my authentication.

问题是我得到401 Not Authenticated异常，这意味着连接没有被重用。

The problem is I get a 401 Not Authenticated exception, which implies the connection hasn’t been reused.

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("my-server");
request.Credentials = new NetworkCredential("user", "password");

request.GetResponse().Close();  // Works fine

// Now the request I want to make...

request = (HttpWebRequest)WebRequest.Create("my-server");
request.Credentials = new NetworkCredential("user", "password");

request.Method = "post";

string postData = "param1=1&param2=2";
byte[] data = new ASCIIEncoding().GetBytes(postData);
request.ContentLength = data.Length;
request.ContentType = "application/x-www-form-urlencoded";

using (Stream stream = request.GetRequestStream())
{
    stream.Write(data, 0, data.Length);
    stream.Close();
    request.GetResponse().Close();      // This line gets a 401 Not Authorized error.
}

编辑：有一些建议我需要传输cookie。以下内容也不起作用：

There has been some suggestions that I need to transfer cookies. The following doesn’t work either:

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("my-server");
request.Credentials = new NetworkCredential("user", "password");

var response = (HttpWebResponse)request.GetResponse();

var cookieContainer = new CookieContainer();
foreach (Cookie cookie in response.Cookies)
{
    cookieContainer.Add(cookie);
}

response.Close();

// Now the request I want to make...

request = (HttpWebRequest)WebRequest.Create("my-server");
request.Credentials = new NetworkCredential("user", "password");
request.CookieContainer = cookieContainer;

request.Method = "post";

string postData = "param1=1&param2=2";
byte[] data = new ASCIIEncoding().GetBytes(postData);
request.ContentLength = data.Length;
request.ContentType = "application/x-www-form-urlencoded";

using (Stream stream = request.GetRequestStream())
{
    stream.Write(data, 0, data.Length);
    request.GetResponse().Close();      // This line gets a 401 Not Authorized error.
}

推荐答案

你不这样做的原因保持登录是因为你没有给HttpWebRequest一个CookieContainer来保持会话ID。

The reason you don't stay logged in is because you don't give the HttpWebRequest a CookieContainer to keep the session id in.

请参阅下面的StackOverflow Q& A的可能解决方案：

See the following to StackOverflow Q&A's for your possible solution:

C＃keep session id通过httpwebrequest

多个同一会话中的WebRequest

我希望这会有所帮助。

这篇关于在C＃中重用与HttpWebRequest的连接的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！