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string hosturl = "http://sharepoint";
string weburl = "/websites";
string fileurl = "Dokumente/test.pdf";
bool overwrite = true;
string title = "test";

string serviceName = hosturl + weburl + "/_vti_bin/_vti_aut/author.dll";


//RequestBody zusammenbasteln            
string method = "put document: 12.0.0.000";
string document = fileurl;
string metaInfo = string.Empty;
string putOption = overWrite ? "overwrite" : "edit";
string keepCheckedOutOption = "false";
string comment = string.Empty;
string returnStr = string.Empty;
byte[] data;
string returnError = string.Empty;

string fpRPCCallStr = "method={0}&service_name={1}&document=[document_name={2};meta_info=[{3}]]&put_option={4}&comment={5}&keep_checked_out={6}";

method = HttpUtility.UrlEncode(method);
putOption = HttpUtility.UrlEncode(putOption);
metaInfo = "vti_title;SW|" + title;
fpRPCCallStr = String.Format(fpRPCCallStr, method, serviceName, document, metaInfo, putOption, comment, keepCheckedOutOption);

//add line feed character to delimit end of command 
byte[] fpRPCCall = System.Text.Encoding.UTF8.GetBytes(fpRPCCallStr + "\n");

//webrequest "konfigurieren"
WebRequest wReq = WebRequest.Create(serviceName);
wReq.Credentials = nwc;
wReq.Method = "POST";
wReq.Proxy = GetDefaultProxy(nwc);
wReq.ContentType = "application/x-vermeer-urlencoded";
wReq.Headers.Add("X-Vermeer-Content-Type", "application/x-vermeer-urlencoded");
wReq.Timeout = Timeout.Infinite;
wReq.ContentLength = fpRPCCall.Length + fileBinary.Length;

Stream requestStream = wReq.GetRequestStream();

//den fp RPC call abstezen
requestStream.WriteTimeout = System.Threading.Timeout.Infinite;
requestStream.Write(fpRPCCall, 0, fpRPCCall.Length);

requestStream.Flush();

// buffer definieren
int bytesRead = 0;
int chunkSize = 4096;
int tailSize;
int chunkNum = Math.DivRem((int)fileBinary.Length, chunkSize, out tailSize);


int sleep = 10;

// daten hochschieben
for (int j = 0; j < chunkNum; j++)
{
  data = new byte[chunkSize];
  bytesRead = fileBinary.Read(data, 0, chunkSize);

  requestStream.Write(data, 0, chunkSize);
  requestStream.Flush();
  if(((j+1)*chunkSize%(1024*1024))==0)
    Console.WriteLine((j + 1) * chunkSize / 1024 + "kB");
  Thread.Sleep(sleep);
}

//send the remainde if any. 
if (tailSize > 0)
{
  data = new byte[tailSize];
  bytesRead = fileBinary.Read(data, 0, tailSize);
  
  requestStream.Write(data, 0, tailSize);
  requestStream.Flush();
}

requestStream.Flush();
requestStream.Close();
requestStream.Dispose();

//Response anfordern - jetzt schickt er nochmal alle daten mit, d.h. ein 20 mb file erzeugt 40 mb traffic
WebResponse response = wReq.GetResponse();