[Mono-bugs] [Bug 491590] New: The FTPWebRequest class doesn't properly resume file downloads

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Thu Apr 2 13:16:11 EDT 2009


           Summary: The FTPWebRequest class doesn't properly resume file
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.4.x
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: System
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: josecoig at cae.net
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---

User-Agent:       Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0;
Trident/4.0; GTB5; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR
3.5.30729; .NET CLR 3.0.30618)

When trying to resume a download from an ftp server using the "ContentOffset"
property, the response stream returns the whole requested file, from its

Reproducible: Always

Steps to Reproduce:
This is the source code to reproduce the error:

FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create (ftpPath);
ftp.Credentials = new NetworkCredential (user, password);
ftp.Proxy = this.proxy;
ftp.Method = WebRequestMethods.Ftp.DownloadFile;
ftp.ContentOffset = offset;
FTPWebResponse response = (FtpWebResponse)ftp.GetResponse ();
Stream s = response.GetResponseStream ();

Actual Results:  
The stream starts at byte 0 of the requested file.

Expected Results:  
The stream should start at byte "offset".

I have observed this behaviour running on Mac OS X 10.5, and connecting to a
Windows FTP Server which has specific home directories for each FTP user. I
don't know if the problem occurs in other client operating systems, or with
different FTP server configurations.

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