private static void GetSizeAndSource(DownloadOptions options)
{
var client = new SimpleHttpGetByRangeClient(options.Uri);
var response = client.Get(options.Uri, 0, 1);
if (response != null)
{
if (response.IsStatusCodeRedirect && !String.IsNullOrWhiteSpace(response.Location))
{
if (response.Location != options.Uri.AbsoluteUri)
{
options.Uri = new Uri(response.Location);
Console.WriteLine("Detected Redirect: " + options.Uri);
GetSizeAndSource(options);
}
else
{
throw new ArgumentException("Supplied Url has no source");
}
}
else if (response.WasSuccessful && response.ContentRangeLength >= 0)
{
options.FileSize = response.ContentRangeLength;
}
else
{
throw new Exception("Response was not successful, status code: " + response.StatusCode);
}
}
}
private static OptionSet CreateOptions(DownloadOptions options)
{
var optionSet = new OptionSet()
{
{"h|?|help", "Show available options", o => options.ShowHelp = true},
{"i|interactive", "interactive mode, no exit codes",o => options.IsInteractive = true},
{"fs|filesize|size=", "The expected file size", (long o) => options.FileSize = o},
{
"mc|maxchunksize|maxchunk|chunkschnizzle=", "Max Chunk Size",
(int o) => options.MaxChunkSize = o
},
{
"mt|maxthreads|threadschnizzle=", "Max thread count",
(int o) => options.MaxThreads = o
},
{"q|quit", "Quit", v => options.ShouldExit = true},
{
"f|file=", "the file to be created, will overwrite if exists",
f => options.OutputFile = f.Replace(@"""", "")
},
{
"<>", "the url to retrieve", f =>
{
try
{
options.Uri = new Uri(f.Replace(@"""", ""));
}
catch (Exception e)
{
options.Exception = e;
}
}
}
};
return optionSet;
}
private static bool ProcessArgs(string[] args)
{
var options = new DownloadOptions();
try
{
var optionSet = CreateOptions(options);
optionSet.Parse(args);
if (options.ShowHelp || (options.Uri == null))
{
optionSet.WriteOptionDescriptions(Console.Out);
}
else if (options.HasException)
{
Console.WriteLine(options.Exception.Message);
}
else
{
//go get file size
GetSizeAndSource(options);
LargeFileDownloadParameters parameters = null;
if (options.Uri != null && options.FileSize.HasValue && options.FileSize.Value > 0)
{
parameters = new LargeFileDownloadParameters(options.Uri, options.OutputFile,
options.FileSize.Value,
options.MaxThreads, options.MaxChunkSize);
}
if (parameters != null)
{
Action<string> logger = (message) => Debug.WriteLine(message);
var token = new CancellationToken();
var watch = new Stopwatch();
watch.Start();
IAsyncProgress<LargeFileDownloadProgressChangedEventArgs> progress =new AsyncProgress<LargeFileDownloadProgressChangedEventArgs>(Handler);
var task = parameters.DownloadAsync(token, progress, logger);
task.Wait();
watch.Stop();
ClearCurrentConsoleLine();
Console.WriteLine("done in {0}ms ({1}m {2}s {3}ms", watch.ElapsedMilliseconds, watch.Elapsed.Minutes, watch.Elapsed.Seconds, watch.Elapsed.Milliseconds);
if (options.IsInteractive)
{
return true;
}
Environment.Exit(0);
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
if (options.IsInteractive)
{
return true;
}
Environment.Exit(-1);
}
return !options.ShouldExit;
}
