/// <param name="download_url">Url of file to download</param>
/// <param name="download_dest">Directory where to save the file</param>
/// <param name="checksumField">Checksum instance of file or null</param>
/// <returns>
/// An <see cref="Capuchin.Downloaders.AbstractDownloader" /> instance to
/// download the given file
/// </returns>
internal int DownloadFile(string download_url, string download_dest,
string signature, checksum checksumField)
{
Download dl = new Download(this.downloadsIndex, download_url, download_dest, signature, checksumField);
Downloaders.AbstractDownloader downloader = this.GetDownloader(this.downloadsIndex, dl);
downloader.Status += new Downloaders.StatusHandler( this.OnDownloadStatus );
downloader.Finished += new Downloaders.FinishedHandler( this.DownloadFinishedCallback );
Thread downloaderThread = new Thread( new ThreadStart(downloader.Download) );
dl.Downloader = downloaderThread;
lock (this) {
this.Downloads.Add( this.downloadsIndex, dl );
this.downloadsIndex++;
downloaderThread.Start();
}
Log.Info("Started downloading file {0} to {1} with id '{2}'",
download_url, download_dest, this.downloadsIndex-1);
return (this.downloadsIndex-1);
}
/// <summary>Check checksum and signature of the file</summary>
/// <param name="local_file">Path to the downloaded file</param>
/// <param name="signature">URL of the signature file</param>
/// <param name="checksumField">Checksum information</param>
internal void CheckFile(string local_file, string signature, checksum checksumField)
{
Log.Info ("Checking file");
if (checksumField != null)
{
FileStream fs = new FileStream( local_file, FileMode.Open );
ChecksumVerifier cv = new ChecksumVerifier( fs, checksumField );
fs.Close();
Log.Info("Checksum valid for {0}: {1}", local_file, cv.IsValid);
if (!cv.IsValid)
{
// Checksum is invalid
File.Delete(local_file);
return;
}
}
if (signature != null)
{
GnuPGVerifier gv = new GnuPGVerifier(local_file, signature);
Log.Info("Signature valid for {0}: {1}", local_file, gv.IsValid);
if (!gv.IsValid)
{
// Signature invalid
File.Delete(local_file);
return;
}
}
}