HttpWebRequest的 - 远程服务器返回错误：（400）错误的请求 [英] HttpWebRequest-The remote server returned an error: (400) Bad Request

问题描述

我正的远程服务器返回错误：（400）错误的请求错误，而运行以下code。 我想上传XML文件的HTTP服务器上。 我的XML文件中包含标记为用户名，密码和域名，当我试图连接是手动，我能够进行连接，但使用相同的凭据，当我试图通过这个code将其连接，我得到400错误的请求错误。 请建议我如何克服这个问题。 谢谢  `

 公共静态无效UploadHttp（XML字符串）
    {

        字符串为txtResults =的String.Empty;
        尝试
        {
            字符串的URL =htt​​p://my.server.com/upload.aspx;
            HttpWebRequest的要求=（HttpWebRequest的）HttpWebRequest.Create（URL）;
            request.KeepAlive = FALSE;
            request.SendChunked = TRUE;
            request.AllowAutoRedirect = TRUE;
            request.Method =邮报;
            request.ContentType =为text / xml;
            变种EN codeR =新UTF8Encoding（）;
            VAR数据= EN coder.GetBytes（XML）;
            request.ContentLength = data.Length;
            变种reqStream = request.GetRequestStream（）;
            reqStream.Write（数据，0，data.Length）;
            reqStream.Close（）;
            WebResponse的响应= NULL;
            响应= request.GetResponse（）;
            VAR读卡器=新的StreamReader（response.GetResponseStream（））;
            VAR海峡= reader.ReadToEnd（）;
        }
        赶上（WebException前）
        {
            如果（ex.Status == WebExceptionStatus.ProtocolError）
            {
                HttpWebResponse ERR = ex.Response为HttpWebResponse;
                如果（ERR！= NULL）
                {
                    串htmlResponse =新的StreamReader（err.GetResponseStream（））ReadToEnd（）。
                    为txtResults =的String.Format（{0} {1}，err.StatusDescription，htmlResponse）;
                }
            }
            其他
            {

            }
        }
        赶上（例外前）
        {
            为txtResults = ex.ToString（）;
        }
    }`
 

解决方案

您确定您应该使用POST不放？

POST通常用于应用程序/ x-WWW-urlen codeD 格式。如果您使用的是REST API，你也许应该是使用PUT？如果你上传的文件，你可能需要使用的multipart / form-data的。并非总是如此，但通常，这是正确的事情。

另外你似乎没有使用凭据登录 - 你需要使用HttpWebRequest对象的凭据属性发送用户名和密码

。

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 `

  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();
        }
    }`

解决方案

Are you sure you should be using POST not PUT?

POST is usually used with application/x-www-urlencoded formats. 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..

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.

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