我需要使用 .Net 发出 POST 请求。
我可以通过 GET 进行身份验证,因此我尝试在同一连接上发出 POST 请求以保持身份验证。
问题是我收到 401 Not Authenticated 异常,这意味着连接尚未被重用。
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¶m2=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:有人建议我需要传输cookie。以下也不起作用:
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¶m2=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.
}
您不保持登录状态的原因是您没有为 HttpWebRequest 提供 CookieContainer 来保存会话 ID。
请参阅以下 StackOverflow 问答,了解您可能的解决方案:
C# 通过 httpwebrequest 保留会话 ID
同一会话中的多个 WebRequest
我希望这有帮助。
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