我正在尝试使用 HttpWebRequest 发布表单，但出现内部服务器错误。我尝试在请求中设置 useragent 但没有成功。
这是获得表格的网址。
https://portal.llg.de/tracking/xml/sender.asp?cust=anonym_
这是我的示例代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
namespace postdata
{
public class RequestManager
{
public static string LastResponse { protected set; get; }
public static void Main(string[] args)
{
System.Net.ServicePointManager.Expect100Continue = false;
string content = "XML=<VORGANG><KUNDE>6400320</KUNDE><LIEFADR>..... Tokio, Japan</LIEFADR><POS NUMMER='1'><ARTNR>9000032</ARTNR><MENGE>10</MENGE><BESTAND>25</BESTAND></POS><POS NUMMER='2'><ARTNR>9161161</ARTNR><MENGE>100</MENGE><BESTAND>33</BESTAND><TERMIN>20050401</TERMIN><PREIS>80.00</PREIS></POS><VERSAND>80.00</VERSAND></VORGANG>";
string url = "https://portal.llg.de/tracking/xml/receiver.asp?cust=_anonym_";
var response = SendPOSTRequest(url, content, true);
var responsecontent = GetResponseContent(response);
}
public static string GetResponseContent(HttpWebResponse response)
{
if (response == null)
{
throw new ArgumentNullException("response");
}
Stream dataStream = null;
StreamReader reader = null;
string responseFromServer = null;
try
{
// Get the stream containing content returned by the server.
dataStream = response.GetResponseStream();
// Open the stream using a StreamReader for easy access.
reader = new StreamReader(dataStream);
// Read the content.
responseFromServer = reader.ReadToEnd();
// Cleanup the streams and the response.
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
if (reader != null)
{
reader.Close();
}
if (dataStream != null)
{
dataStream.Close();
}
response.Close();
}
LastResponse = responseFromServer;
return responseFromServer;
}
public static HttpWebResponse SendPOSTRequest(string uri, string content, bool allowAutoRedirect)
{
HttpWebRequest request = GeneratePOSTRequest(uri, content, allowAutoRedirect);
return GetResponse(request);
}
public static HttpWebRequest GeneratePOSTRequest(string uri, string content, bool allowAutoRedirect)
{
return GenerateRequest(uri, content, "POST", null, null, allowAutoRedirect);
}
internal static HttpWebRequest GenerateRequest(string uri, string content, string method, string login, string password, bool allowAutoRedirect)
{
if (uri == null)
{
throw new ArgumentNullException("uri");
}
// Create a request using a URL that can receive a post.
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
// Set the Method property of the request to POST.
request.Method = method;
// Set cookie container to maintain cookies
// request.CookieContainer = cookies;
request.AllowAutoRedirect = false;
// If login is empty use defaul credentials
if (string.IsNullOrEmpty(login))
{
// request.Credentials = CredentialCache.DefaultNetworkCredentials;
request.Credentials = CredentialCache.DefaultCredentials;
}
else
{
request.Credentials = new NetworkCredential(login, password);
}
if (method == "POST")
{
// Convert POST data to a byte array.
byte[] byteArray = Encoding.UTF8.GetBytes(content);
// Set the ContentType property of the WebRequest.
request.ContentType = "application/x-www-form-urlencoded";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)";
// Set the ContentLength property of the WebRequest.
request.ContentLength = byteArray.Length;
// Get the request stream.
Stream dataStream = request.GetRequestStream();
// Write the data to the request stream.
dataStream.Write(byteArray, 0, byteArray.Length);
// Close the Stream object.
dataStream.Close();
}
return request;
}
internal static HttpWebResponse GetResponse(HttpWebRequest request)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
HttpWebResponse response = null;
try
{
response = (HttpWebResponse)request.GetResponse();
}
catch (WebException ex)
{
Console.WriteLine("Web exception occurred. Status code: {0}", ex.Status);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return response;
}
}
}