public async Task RequestToDownloadContainer(RequestDownloadContainerInfo info)
{
ServerResponse response = new ServerResponse()
{
payload = new Dictionary <string, string>()
};
response.payload.Add("Status", "request received.");
await SendResponse(response);
_packageService = _serviceAccessor("ContainerService");
string resourceName = await _packageService.DownloadPackageAsync(Context.ConnectionId, info);
string downloadUrl = $"./download/file?name={resourceName}";
response.payload.Clear();
response.payload.Add("Status", "download completed.");
response.payload.Add("DownloadUrl", downloadUrl);
await SendResponse(response);
}
public async Task <string> DownloadPackageAsync(string connectionID, RequestDownloadInfo requestInfo)
{
// cast
RequestDownloadContainerInfo info = (RequestDownloadContainerInfo)requestInfo;
// server response
ServerResponse response = new ServerResponse()
{
payload = new Dictionary <string, string>()
};
string _outputDirectory = $"{_environment.ContentRootPath}/wwwroot/{_configuration.GetValue<string>("DownloadPath")}";
// check if output directory exists
if (!Directory.Exists(_outputDirectory))
{
Directory.CreateDirectory(_outputDirectory);
}
string fileName = info.image.Replace("/", "-").Replace(":", "-");
string connectionSubName = $"container-{fileName}-{connectionID}-{DateTime.Now:yyyymmddHHmmss}";
// send message
response.payload.Clear();
response.payload.Add("Resource", $"{connectionSubName} created.");
await _downloadHubContext.Clients.Client(connectionID).Response(response);
// docker pull
Process compiler = new Process();
compiler.StartInfo.FileName = "docker";
compiler.StartInfo.Arguments = $"pull {info.image}";
compiler.StartInfo.UseShellExecute = false;
compiler.StartInfo.RedirectStandardOutput = true;
compiler.OutputDataReceived += async(sender, args) => await sendMessageAsync(connectionID, args.Data);
compiler.Start();
compiler.BeginOutputReadLine();
compiler.WaitForExit();
// send message
response.payload.Clear();
response.payload.Add("DownloadCounter", $"download finished.");
await _downloadHubContext.Clients.Client(connectionID).Response(response);
// docker save
Process compiler2 = new Process();
compiler2.StartInfo.FileName = "docker";
compiler2.StartInfo.Arguments = $"save -o {_outputDirectory}/{connectionSubName}.zip {info.image}";
compiler2.StartInfo.UseShellExecute = false;
compiler2.StartInfo.RedirectStandardOutput = true;
compiler2.OutputDataReceived += (sender, args) => Console.WriteLine("received output: {0}", args.Data);
compiler2.Start();
compiler2.BeginOutputReadLine();
compiler2.WaitForExit();
string readableSize = FileUtil.getFileHumanReadableSize($"{_outputDirectory}/{connectionSubName}.zip");
// send message
response.payload.Clear();
response.payload.Add("CompressStatus", $"compressed ok, file sieze: {readableSize}.");
await _downloadHubContext.Clients.Client(connectionID).Response(response);
// delete image
Process compiler3 = new Process();
compiler3.StartInfo.FileName = "docker";
compiler3.StartInfo.Arguments = $"rmi {info.image}";
compiler3.StartInfo.UseShellExecute = false;
compiler3.Start();
compiler3.WaitForExit();
return(connectionSubName);
}