public void DownloadFile(string remoteFileName, string localFileName)
{
if (string.IsNullOrEmpty(localFileName))
{
localFileName = Path.GetFileName(remoteFileName.Replace("\\", "/"));
}
if (string.IsNullOrEmpty(localFileName))
{
return;
}
var completeFilePath = Path.Combine(Scanner.Configuration.Proxy.MirrorRoot, VersionName, localFileName);
var fileDirectory = Path.GetDirectoryName(completeFilePath);
if (string.IsNullOrEmpty(fileDirectory))
{
return;
}
if (!Directory.CreateDirectory(fileDirectory).Exists)
{
return;
}
if (File.Exists(completeFilePath))
{
return;
}
var fileEntry = GetEntry(remoteFileName);
if (fileEntry == null)
{
return;
}
using (var blte = new BLTE(CDN.Hosts[0]))
{
if (fileEntry.ArchiveIndex != -1)
{
blte.AddHeader("Range", $"bytes={fileEntry.Offset}-{fileEntry.Offset + fileEntry.Size - 1}");
}
var archiveName = fileEntry.Hash.ToHexString();
if (fileEntry.ArchiveIndex != -1)
{
archiveName = Indices.Archives[fileEntry.ArchiveIndex].ToHexString();
}
blte.Send($"/{CDN.Path}/data/{archiveName.Substring(0, 2)}/{archiveName.Substring(2, 2)}/{archiveName}");
Scanner.WriteLine($"[{VersionName}] Downloading {localFileName} from {blte.URL} ...");
using (var fileStream = File.OpenWrite(completeFilePath))
blte.PipeTo(fileStream);
}
}
private static void Process(HttpListenerContext context)
{
var tokens = context.Request.Url.AbsolutePath.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
if (tokens.Length == 0)
{
WriteError(context, "Badly formatted request.", HttpStatusCode.BadRequest);
return;
}
var buildName = tokens[0];
var fileHash = ulong.Parse(tokens[1]);
var fileName = tokens[2];
var buildInfo = RemoteBuildManager.GetBuild(buildName);
if (buildInfo == null)
{
WriteError(context, "Unknown build.", HttpStatusCode.BadRequest);
return;
}
var fileEntry = buildInfo.GetEntry(fileHash);
if (fileEntry == null)
{
WriteError(context, "This build is currently loading. Try again later.", HttpStatusCode.BadRequest);
return;
}
try
{
using (var blte = new BLTE(buildInfo.CDN.Hosts[0]))
{
if (fileEntry.ArchiveIndex != -1)
{
blte.AddHeader("Range", $"bytes={fileEntry.Offset}-{fileEntry.Offset + fileEntry.Size - 1}");
}
var archiveName = fileEntry.Hash.ToHexString();
if (fileEntry.ArchiveIndex != -1)
{
archiveName = buildInfo.Indices.Archives[fileEntry.ArchiveIndex].ToHexString();
}
blte.Send($"/{buildInfo.CDN.Path}/data/{archiveName.Substring(0, 2)}/{archiveName.Substring(2, 2)}/{archiveName}");
Scanner.WriteLine($"[PROXY] Serving {fileName} through {blte.URL}.");
if (!blte.Failed)
{
context.Response.ContentType = "application/octet-stream";
context.Response.ContentLength64 = blte.DecompressedLength;
context.Response.AddHeader("Date", blte.ResponseHeaders.Get("Date"));
context.Response.AddHeader("ETag", blte.ResponseHeaders.Get("ETag"));
context.Response.AddHeader("Last-Modified", DateTime.Now.ToString("r"));
context.Response.AddHeader("Connection", "Keep-Alive");
context.Response.StatusCode = (int)HttpStatusCode.OK;
Scanner.WriteLine($"[PROXY] Serving {fileName} to {context.Request.RemoteEndPoint} - {archiveName}");
blte.PipeTo(context.Response.OutputStream);
}
else
{
var sBuilder = new StringBuilder();
sBuilder.AppendLine($"File {fileName} cannot be downloaded - it might be an encrypted archive...");
sBuilder.AppendLine();
sBuilder.AppendLine($"Requested archive: {blte.URL}");
if (fileEntry.ArchiveIndex != -1)
{
sBuilder.AppendLine($"Range: {fileEntry.Offset}-{fileEntry.Offset + fileEntry.Size - 1}");
}
WriteError(context, sBuilder.ToString(), HttpStatusCode.InternalServerError);
}
}
}
catch (IOException ioe)
{
Scanner.WriteLine("[PROXY] Remote client closed the connection.");
}
catch (Exception e)
{
Scanner.WriteLine(e.ToString());
WriteError(context, e.ToString(), HttpStatusCode.InternalServerError);
}
}