private void InstallGameAsync()
{
//This value is filled with either a path to the last downloaded file, or with an exception message
//this message is used in the main UI to determine how it responds to a failed download.
string fileReturn = "";
try
{
FTPHandler FTP = new FTPHandler();
ManifestHandler manifestHandler = new ManifestHandler();
List <ManifestEntry> Manifest = manifestHandler.Manifest;
//create the .install file to mark that an installation has begun
//if it exists, do nothing.
ConfigHandler.CreateInstallCookie();
//raise the progress changed event by binding to the
//event in the FTP class
FTP.FileProgressChanged += OnDownloadProgressChanged;
//in order to be able to resume downloading, we check if there is an entry
//stored in the install cookie.
ManifestEntry lastDownloadedFile = null;
string installCookiePath = ConfigHandler.GetInstallCookiePath();
//attempt to parse whatever is inside the install cookie
if (ManifestEntry.TryParse(File.ReadAllText(installCookiePath), out lastDownloadedFile))
{
//loop through all the entries in the manifest until we encounter
//an entry which matches the one in the install cookie
foreach (ManifestEntry Entry in Manifest)
{
if (lastDownloadedFile == Entry)
{
//remove all entries before the one we were last at.
Manifest.RemoveRange(0, Manifest.IndexOf(Entry));
}
}
}
//then, start downloading the entries that remain in the manifest.
foreach (ManifestEntry Entry in Manifest)
{
string RemotePath = String.Format("{0}{1}",
Config.GetGameURL(true),
Entry.RelativePath);
string LocalPath = String.Format("{0}{1}{2}",
Config.GetGamePath(true),
System.IO.Path.DirectorySeparatorChar,
Entry.RelativePath);
//make sure we have a game directory to put files in
Directory.CreateDirectory(Path.GetDirectoryName(LocalPath));
//write the current file progress to the install cookie
TextWriter textWriterProgress = new StreamWriter(ConfigHandler.GetInstallCookiePath());
textWriterProgress.WriteLine(Entry.ToString());
textWriterProgress.Close();
if (File.Exists(LocalPath))
{
FileInfo fileInfo = new FileInfo(LocalPath);
if (fileInfo.Length != Entry.Size)
{
//Resume the download of this partial file.
OnProgressChanged();
fileReturn = FTP.DownloadFTPFile(RemotePath, LocalPath, fileInfo.Length, false);
//Now verify the file
string localHash = MD5Handler.GetFileHash(File.OpenRead(LocalPath));
if (localHash != Entry.Hash)
{
Console.WriteLine("InstallGameAsync: Resumed file hash was invalid, downloading fresh copy from server.");
OnProgressChanged();
fileReturn = FTP.DownloadFTPFile(RemotePath, LocalPath, false);
}
}
}
else
{
//no file, download it
OnProgressChanged();
fileReturn = FTP.DownloadFTPFile(RemotePath, LocalPath, false);
}
if (ChecksHandler.IsRunningOnUnix())
{
//if we're dealing with a file that should be executable,
string gameName = Config.GetGameName();
bool bFileIsGameExecutable = (Path.GetFileName(LocalPath).EndsWith(".exe")) || (Path.GetFileNameWithoutExtension(LocalPath) == gameName);
if (bFileIsGameExecutable)
{
//set the execute bits
UnixHandler.MakeExecutable(LocalPath);
}
}
}
//we've finished the download, so empty the cookie
File.WriteAllText(ConfigHandler.GetInstallCookiePath(), String.Empty);
//raise the finished event
OnGameDownloadFinished();
//clear out the event handler
FTP.FileProgressChanged -= OnDownloadProgressChanged;
}
catch (IOException ioex)
{
Console.WriteLine("IOException in InstallGameAsync(): " + ioex.Message);
DownloadFailedArgs.Result = "1";
DownloadFailedArgs.ResultType = "Install";
DownloadFinishedArgs.Metadata = fileReturn;
OnGameDownloadFailed();
}
}