private void Worker(object task)
{
try
{
DownloadTask downloadTask = (DownloadTask)task;
WebClient webClient = new WebClient();
webClient.DownloadFile(downloadTask.Url, downloadTask.FileName);
Console.WriteLine("Downloading ..." + downloadTask.Url);
}
catch (Exception e)
{
Console.Error.WriteLine(e);
}
finally
{
semaphore.Release();
}
}
public Program(string[] args)
{
int threads = 1;
String date = args[0];
int tileMatrix = Int32.Parse(args[1]);
try
{
threads = Int32.Parse(args[2]);
}
catch { }
semaphore = new Semaphore(threads, threads);
Console.WriteLine("Threads: " + threads);
//Thread.Sleep(2000);
Console.WriteLine("Downloading Date: " + date + ", TileMatrix: " + tileMatrix);
double tileSize = 288 / Math.Pow(2, tileMatrix);
int maxCol = (int)(360 / tileSize);
int maxRow = (int)(180 / tileSize);
String url = "https://gibs-{a-c}.earthdata.nasa.gov/wmts/epsg4326/best/wmts.cgi?TIME=" + date + "T00:00:00Z&layer=VIIRS_SNPP_CorrectedReflectance_TrueColor&style=default&tilematrixset=250m&Service=WMTS&Request=GetTile&Version=1.0.0&Format=image/jpeg&TileMatrix=" + tileMatrix + "&TileCol={TileCol}&TileRow={TileRow}";
int totalFiles = maxRow * maxCol;
DirectoryInfo outDi = new DirectoryInfo("out");
if (!outDi.Exists)
{
outDi.Create();
}
DirectoryInfo dateDi = new DirectoryInfo(outDi.FullName + "\\" + date);
if (!dateDi.Exists)
{
dateDi.Create();
}
DirectoryInfo tileDi = new DirectoryInfo(dateDi.FullName + "\\TileMatrix" + tileMatrix);
if (!tileDi.Exists)
{
tileDi.Create();
}
char[] serverVariation = new char[] { 'a', 'b', 'c' };
Random r = new Random();
for (int row = 0; row < maxRow; row++)
{
for (int col = 0; col < maxCol; col++)
{
FileInfo fileInfo = new FileInfo(tileDi.FullName + "\\" + row + "_" + col + ".jpg");
int currentFile = row * maxCol + col;
double progress = ((double)currentFile) / totalFiles;
String downloadUrl = url.Replace("{TileCol}", "" + col)
.Replace("{TileRow}", "" + row).
Replace("{a-c}", "" + serverVariation[r.Next() % 3]);
//Console.WriteLine(String.Format("{0:P2}.", progress)+"\t"+downloadUrl);
Console.Write(String.Format("{0:P2}.", progress) + "\t" + date + "\t" + tileMatrix + "\t" + row + "\t" + col + "\t");
if (fileInfo.Exists && fileInfo.Length > 0)
{
Console.WriteLine("File exists, " + fileInfo.Length + " bytes, skipping...");
continue;
}
else
{
Console.Write("Download...\t");
DownloadTask downloadTask = new DownloadTask()
{
FileName = fileInfo.FullName, Url = downloadUrl
};
semaphore.WaitOne();
Thread t = new Thread(new ParameterizedThreadStart(Worker));
t.Start(downloadTask);
}
}
}
for (int i = 0; i < threads; i++)
{
semaphore.WaitOne();
}
}
