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<TITLE> [Mono-bugs] [Bug 478451] New: WebClient.UploadData throws &quot;ProtocolViolationException&quot; on FTP upload
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<H1>[Mono-bugs] [Bug 478451] New: WebClient.UploadData throws &quot;ProtocolViolationException&quot; on FTP upload</H1>
<B>bugzilla_noreply at novell.com</B>
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TITLE="[Mono-bugs] [Bug 478451] New: WebClient.UploadData throws &quot;ProtocolViolationException&quot; on FTP upload">bugzilla_noreply at novell.com
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<I>Sat Feb 21 05:46:57 EST 2009</I>
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<PRE><A HREF="https://bugzilla.novell.com/show_bug.cgi?id=478451">https://bugzilla.novell.com/show_bug.cgi?id=478451</A>
Summary: WebClient.UploadData throws
&quot;ProtocolViolationException&quot; on FTP upload
Classification: Mono
Product: Mono: Class Libraries
Version: SVN
Platform: 32bit
OS/Version: Ubuntu
Status: NEW
Severity: Normal
Priority: P5 - None
Component: System
AssignedTo: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at lists.ximian.com</A>
ReportedBy: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">martijndijksterhuis at gmail.com</A>
QAContact: <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">mono-bugs at lists.ximian.com</A>
Found By: ---
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.5)
Gecko/2008121622 Ubuntu/8.10 (intrepid) Firefox/3.0.5
Trying to upload an FTP file through the WebClient class results in an
exception:
[System.Net.ProtocolViolationException: Operation is not valid due to the
current state of the object at System.Net.FtpWebRequest.BeginGetRequestStream
(System.AsyncCallback callback, System.Object state) [0x00000]]
I have tried the code included below on Mono SVN (fails), Mono 1.9.1 (fails)
and Visual C# studio 2008 (succeeds)
Reproducible: Always
Steps to Reproduce:
1.Use the code below to upload a file
2.Watch it fail with the above exception
Actual Results:
System.Net.WebException: An error occurred performing a WebClient request. ---&gt;
System.Net.ProtocolViolationException: Operation is not valid due to the
current state of the object
at System.Net.FtpWebRequest.BeginGetRequestStream (System.AsyncCallback
callback, System.Object state) [0x00000]
at System.Net.FtpWebRequest.GetRequestStream () [0x00000]
at System.Net.WebClient.UploadDataCore (System.Uri address, System.String
method, System.Byte[] data, System.Object userToken) [0x00000]
at System.Net.WebClient.UploadData (System.Uri address, System.String method,
System.Byte[] data) [0x00000] --- End of inner exception stack trace ---
at System.Net.WebClient.UploadData (System.Uri address, System.String method,
System.Byte[] data) [0x00000]
at System.Net.WebClient.UploadData (System.Uri address, System.Byte[] data)
[0x00000]
at (wrapper remoting-invoke-with-check) System.Net.WebClient:UploadData
(System.Uri,byte[])
at BasicFTPClientNamespace.BasicFTPClient.UploadData (System.String path,
System.Byte[] Data) [0x0001d] in
/home/nis/martijn/Projects/BasicFTP/BasicFTP/Main.cs:83
at BasicFTPClientNamespace.BasicFTPClient.UploadFile (System.String ftppath,
System.String srcfile) [0x00056] in
/home/nis/martijn/Projects/BasicFTP/BasicFTP/Main.cs:109
at BasicFTPClientNamespace.MainClass.Main (System.String[] args) [0x0002f] in
/home/nis/martijn/Projects/BasicFTP/BasicFTP/Main.cs:127
Expected Results:
Successful upload of the file to the FTP server.
// Main.cs created with MonoDevelop
// User: martijn at 4:39 PM 2/18/2009
//
// To change standard headers go to Edit-&gt;Preferences-&gt;Coding-&gt;Standard Headers
//
using System;
using System.Net;
using System.IO;
namespace BasicFTPClientNamespace
{
class BasicFTPClient
{
public string Username;
public string Password;
public string Host;
public int Port;
public BasicFTPClient()
{
Username = &quot;anonymous&quot;;
Password = &quot;<A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">anonymous at internet.com</A>&quot;;
Port = 21;
Host = &quot;&quot;;
}
public BasicFTPClient(string theUser,string thePassword,string theHost)
{
Username = theUser;
Password = thePassword;
Host = theHost;
Port = 21;
}
private Uri BuildServerUri(string Path)
{
return new Uri(String.Format(&quot;<A HREF="ftp://{0}:{1}/{2}&quot;,Host,Port,Path">ftp://{0}:{1}/{2}&quot;,Host,Port,Path</A>));
}
public byte[] UploadData(string path,byte[] Data)
{
// Get the object used to communicate with the server.
WebClient request = new WebClient();
// Logon to the server using username + password
request.Credentials = new NetworkCredential (Username,Password);
return request.UploadData(BuildServerUri(path),Data);
}
public byte[] UploadFile(string ftppath,string srcfile)
{
// Read the data from disk
FileStream fs = new FileStream(srcfile, FileMode.Open);
byte [] FileData = new byte[fs.Length];
int numBytesToRead = (int)fs.Length;
int numBytesRead = 0;
while (numBytesToRead &gt; 0)
{
// Read may return anything from 0 to numBytesToRead.
int n = fs.Read(FileData, numBytesRead, numBytesToRead);
// Break when the end of the file is reached.
if (n == 0) break;
numBytesRead += n;
numBytesToRead -= n;
}
numBytesToRead = FileData.Length;
fs.Close();
// Upload the data from the buffer
return UploadData(ftppath,FileData);
}
}
class MainClass
{
public static void Main(string[] args)
{
BasicFTPClient MyClient = new BasicFTPClient();
MyClient.Host=&quot;myserver&quot;;
MyClient.Port=21;
MyClient.Username=&quot;myusername&quot;;
MyClient.Password=&quot;mypassword&quot;;
try
{
MyClient.UploadFile(&quot;upload.test&quot;,&quot;/tmp/output.txt&quot;);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
}
}
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