You must write ContentLength bytes to the request stream before calling [Begin]GetResponse.

Question

Hi guys,

I am having some very wired error. In one of my HttpWebRequest.GetResponse() I have the error in the title. However, I use the same idea for another method yet I get no error.

Here is the code I get the error:

 

HttpWebRequest SendInviteReq = WebRequest.Create(url8) as HttpWebRequest;
            SendInviteReq.Method = "POST";
            string postMessage = "{}";

            SendInviteReq.ContentType = "application/json;charset=utf-8";
            SendInviteReq.ContentLength = postMessage.Length;

            Stream inviteStream = SendInviteReq.GetRequestStream();
            UTF8Encoding encoder4 = new UTF8Encoding();
            byte[] bytes4 = encoder4.GetBytes(postMessage);
            inviteStream.Write(bytes4, 0, bytes4.Length);

            

            HttpWebResponse SendInviteRes = (HttpWebResponse)SendInviteReq.GetResponse();      <--- ERROR IS HERE AT .GetResponse();
            StreamReader SendInviteLog = new StreamReader(SendInviteRes.GetResponseStream());

Here is code pretty much identical, but I DO NOT get the error.

 

 

 

HttpWebRequest LogOutReq = WebRequest.Create(url4) as HttpWebRequest;
            LogOutReq.Method = "PUT";
            string postData1 = "{\"presenceState\":-1}";

            LogOutReq.ContentType = "application/json;charset=utf-8";
            LogOutReq.ContentLength = postData1.Length;

            Stream dataStream1 = LogOutReq.GetRequestStream();
            UTF8Encoding encoder1 = new UTF8Encoding();
            byte[] bytes1 = encoder1.GetBytes(postData1);
            dataStream1.Write(bytes1, 0, bytes1.Length);

            HttpWebResponse res = (HttpWebResponse)LogOutReq.GetResponse();
            StreamReader LogOffReader = new StreamReader(res.GetResponseStream());

Why when I execute the first code I get the error, but not for the second code?

 

 

Thank you

Answer 1

Hi,

I have the same error, but haven't resolved.

The error is raised in this method: 

WebResponse response = request.GetResponse();

Code is bellow:

WebRequest request = WebRequest.Create(new Uri(url));
request.Method = "POST";


byte[] dataBuffer = System.Text.Encoding.UTF8.GetBytes(xml);
request.ContentType = "text/xml";
request.ContentLength = dataBuffer.Length;

Stream stream = request.GetRequestStream();
stream.Write(dataBuffer, 0, dataBuffer.Length);
request.Timeout = 300000;

WebResponse response = request.GetResponse();
stream = response.GetResponseStream();

Regards,

JP.

Answer 2

Try using "GET" instead of "POST".  Also set data lenght to zero.  The GetRequestStream will set the return length.  It doesn't like any other value but zero.

Answer 3

It works for me here in a quick test. I'd close the request stream before calling GetResponse. So change to:

using (Stream stream = request.GetRequestStream()) {
   stream.Write(dataBuffer, 0, dataBuffer.Length);
}

---

http://www.alanjmcf.me.uk/ Please follow-up in the newsgroup. If I help, please vote and/or mark the question answered. Available for contract programming.

Answer 4

Hi,

I have resolved my problem using the following link:

http://msdn.microsoft.com/en-us/library/debx8sh9.aspx

Thanks for the responses,

JP.

Answer 5

Hi,

Unfortunately my code is not working, i had make the implementation above by the msdn link, it resolved me that problem, but i had a proxy problem that now is resolved, and now i have the begin problem. I have implemented Joel solution but it gives me the following error: "Cannot send a content-body with this verb-type", and with Alan solution it gives me the following error: "The remote server returned an error: (500) Internal Server Error".

If i use my code, it gives me this error: "You must write ContentLength bytes to the request stream before calling [Begin]GetResponse"

My code:

WebRequest request = WebRequest.Create(new Uri(webServiceAddress));
request.Method = "POST";

byte[] dataBuffer = System.Text.Encoding.UTF8.GetBytes(xmlIn);
request.ContentType = "text/xml";
request.ContentLength = dataBuffer.Length;

Stream stream = request.GetRequestStream();
stream.Write(dataBuffer, 0, dataBuffer.Length);
request.Timeout = 300000;

WebResponse response = request.GetResponse();
stream = response.GetResponseStream();

Thanks in for the responses.

JP.

Answer 6

Webrequest doesn't like POST.  Change to GET or remove statement.  I also think you will get an error setting the length and you should remove the statement.  I had both of these eerrors a few weeks ago and resolved it by removing the statements.  You can use POST for the GetResponse but not sure if it is necessary.

---

jdweng

Answer 7

Hi,

I have changed the request method to "GET" and i have removed, and it gives me the following error: "Cannot send a content-body with this verb-type", in this context i think its necessary to send with request method with POST.

What statement are you suggesting to be removed?

Other thing i have checked is that stream.Lenght and stream.Position are throwing the following exception: "System.NotSupportedException".

Thanks for the response.

JP.

Answer 8

Hi, 

I found the answer, if i put "stream.Close()" after "stream.write(....)", this works fine, i didnt understand why this works with this code.

Regards,

JP.