C# HttpWebRequest-远程服务器返回错误：(400) Bad Request
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HttpWebRequest-The remote server returned an error: (400) Bad Request
提问by user1301587
I am getting The remote server returned an error: (400) Bad Request error while running the following code. I am trying to upload xml file on the http server. My xml file contains tag for the username,password and domain and when i am trying to connect is manually i am able to connect it,but using same credentials when i am trying to connect it through this code, i am getting 400 Bad Request error. Please suggest me how to overcome this issue. Thanks `
我收到远程服务器返回错误：(400) 运行以下代码时出现错误请求错误。我正在尝试在 http 服务器上上传 xml 文件。我的 xml 文件包含用户名、密码和域的标签，当我尝试手动连接时，我可以连接它，但是当我尝试通过此代码连接时使用相同的凭据，我收到 400 Bad Request 错误. 请建议我如何克服这个问题。谢谢`
public static void UploadHttp(string xml)
{
string txtResults = string.Empty;
try
{
string url = "http://my.server.com/upload.aspx ";
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
request.KeepAlive = false;
request.SendChunked = true;
request.AllowAutoRedirect = true;
request.Method = "Post";
request.ContentType = "text/xml";
var encoder = new UTF8Encoding();
var data = encoder.GetBytes(xml);
request.ContentLength = data.Length;
var reqStream = request.GetRequestStream();
reqStream.Write(data, 0, data.Length);
reqStream.Close();
WebResponse response = null;
response = request.GetResponse();
var reader = new StreamReader(response.GetResponseStream());
var str = reader.ReadToEnd();
}
catch (WebException ex)
{
if (ex.Status == WebExceptionStatus.ProtocolError)
{
HttpWebResponse err = ex.Response as HttpWebResponse;
if (err != null)
{
string htmlResponse = new StreamReader(err.GetResponseStream()).ReadToEnd();
txtResults = string.Format("{0} {1}", err.StatusDescription, htmlResponse);
}
}
else
{
}
}
catch (Exception ex)
{
txtResults = ex.ToString();
}
}`
采纳答案by Ben
Are you sure you should be using POST not PUT?
您确定应该使用 POST 而不是 PUT 吗？
POST is usually used with application/x-www-urlencodedformats. If you are using a REST API, you should maybe be using PUT? If you are uploading a file you probably need to use multipart/form-data. Not always, but usually, that is the right thing to do..
POST 通常与application/x-www-urlencoded格式一起使用。如果您使用的是 REST API，您可能应该使用 PUT？如果您要上传文件，您可能需要使用multipart/form-data. 并非总是如此，但通常，这是正确的做法。
Also you don't seem to be using the credentials to log in - you need to use the Credentials property of the HttpWebRequest object to send the username and password.
此外，您似乎没有使用凭据登录 - 您需要使用 HttpWebRequest 对象的 Credentials 属性来发送用户名和密码。
回答by YvesR
What type of authentication do you use? Send the credentials using the properties Ben said before and setup a cookie handler. You already allow redirection, check your webserver if any redirection occurs (NTLM auth does for sure). If there is a redirection you need to store the session which is mostly stored in a session cookie.
您使用什么类型的身份验证？使用 Ben 之前所说的属性发送凭据并设置 cookie 处理程序。您已经允许重定向，如果发生任何重定向，请检查您的网络服务器（NTLM 身份验证确实如此）。如果有重定向，您需要存储主要存储在会话 cookie 中的会话。
回答by tamil
400 Bad request Error will be thrown due to incorrect authentication entries.
由于不正确的身份验证条目，将抛出 400 Bad request 错误。
- Check if your API URL is correct or wrong. Don't append or prepend spaces.
- Verify that your username and password are valid. Please check any spelling mistake(s) while entering.
- 检查您的 API URL 是否正确。不要附加或前置空格。
- 验证您的用户名和密码是否有效。输入时请检查任何拼写错误。
Note: Mostly due to Incorrect authentication entries due to spell changes will occur 400 Bad request.
注意：主要是由于拼写更改导致的不正确的身份验证条目会出现 400 Bad request。
