/// <summary>
/// Downloads a file from the specified <paramref name="url"/>,
/// storing in <paramref name="path"/>, under name <paramref name="uncompressedFileName"/>.
/// </summary>
///
/// <param name="url">The URL where the file should be downloaded from.</param>
/// <param name="path">The path where the file will be stored localy.</param>
/// <param name="uncompressedFileName">The generated name of the uncompressed file.</param>
///
/// <returns><c>true</c> if the download succeeded, <c>false</c> otherwise.</returns>
///
public static bool Download(string url, string path, out string uncompressedFileName)
{
string name = System.IO.Path.GetFileName(url);
string downloadedFileName = System.IO.Path.Combine(path, name);
if (!File.Exists(downloadedFileName))
{
Directory.CreateDirectory(path);
using (var client = new WebClient())
client.DownloadFile(url, downloadedFileName);
}
// If the file is compressed, decompress it to disk
if (downloadedFileName.EndsWith(".bz2", StringComparison.InvariantCultureIgnoreCase))
{
uncompressedFileName = downloadedFileName.Remove(downloadedFileName.Length - 4);
if (!File.Exists(uncompressedFileName))
{
using (var compressedFile = new FileStream(downloadedFileName, FileMode.Open))
using (var uncompressedFile = new FileStream(uncompressedFileName, FileMode.CreateNew))
{
BZip2.Decompress(compressedFile, uncompressedFile, false);
}
}
}
else if (downloadedFileName.EndsWith(".gz", StringComparison.InvariantCultureIgnoreCase))
{
uncompressedFileName = downloadedFileName.Remove(downloadedFileName.Length - 3);
if (!File.Exists(uncompressedFileName))
{
using (var compressedFile = new FileStream(downloadedFileName, FileMode.Open))
using (var decompressedFile = new GZipInputStream(compressedFile))
using (var uncompressedFile = new FileStream(uncompressedFileName, FileMode.CreateNew))
{
decompressedFile.CopyTo(uncompressedFile);
}
}
}
else if (downloadedFileName.EndsWith(".Z", StringComparison.InvariantCultureIgnoreCase))
{
uncompressedFileName = downloadedFileName.Remove(downloadedFileName.Length - 2);
if (!File.Exists(uncompressedFileName))
{
using (var compressedFile = new FileStream(downloadedFileName, FileMode.Open))
using (var decompressedFile = new Accord.IO.Compression.LzwInputStream(compressedFile))
using (var uncompressedFile = new FileStream(uncompressedFileName, FileMode.CreateNew))
{
decompressedFile.CopyTo(uncompressedFile);
}
}
}
else
{
uncompressedFileName = downloadedFileName;
}
return(true);
}
/// <summary>
/// Downloads a file from the specified <paramref name="url"/>,
/// storing in <paramref name="localPath"/>, under name <paramref name="uncompressedFileName"/>.
/// </summary>
///
/// <param name="url">The URL where the file should be downloaded from.</param>
/// <param name="localPath">The path where the file will be stored localy.</param>
/// <param name="localFileName">The local file name to be used for the download.</param>
/// <param name="uncompressedFileName">The generated name of the uncompressed file.</param>
///
/// <returns><c>true</c> if the download succeeded, <c>false</c> otherwise.</returns>
///
public static bool Download(string url, string localPath, string localFileName, out string uncompressedFileName)
{
if (String.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
if (String.IsNullOrEmpty(localPath))
{
throw new ArgumentNullException("localPath");
}
if (String.IsNullOrEmpty(localFileName))
{
throw new ArgumentNullException("localFileName");
}
string downloadedFullFilePath = System.IO.Path.Combine(localPath, localFileName);
if (!File.Exists(downloadedFullFilePath))
{
Directory.CreateDirectory(localPath);
using (var client = ExtensionMethods.NewWebClient())
client.DownloadFileWithRetry(url, downloadedFullFilePath);
}
// If the file is compressed, decompress it to disk
if (endsWith(localFileName, ".bz2"))
{
uncompressedFileName = downloadedFullFilePath.Remove(downloadedFullFilePath.Length - 4);
if (!File.Exists(uncompressedFileName))
{
using (var compressedFile = new FileStream(downloadedFullFilePath, FileMode.Open, FileAccess.Read))
using (var uncompressedFile = new FileStream(uncompressedFileName, FileMode.CreateNew, FileAccess.Write))
{
BZip2.Decompress(compressedFile, uncompressedFile, false);
}
}
}
else if (endsWith(localFileName, ".gz"))
{
uncompressedFileName = downloadedFullFilePath.Remove(downloadedFullFilePath.Length - 3);
if (!File.Exists(uncompressedFileName))
{
using (var compressedFile = new FileStream(downloadedFullFilePath, FileMode.Open, FileAccess.Read))
using (var decompressedFile = new GZipInputStream(compressedFile))
using (var uncompressedFile = new FileStream(uncompressedFileName, FileMode.CreateNew, FileAccess.Write))
{
decompressedFile.CopyTo(uncompressedFile);
}
}
}
else if (endsWith(downloadedFullFilePath, ".Z"))
{
uncompressedFileName = downloadedFullFilePath.Remove(downloadedFullFilePath.Length - 2);
if (!File.Exists(uncompressedFileName))
{
using (var compressedFile = new FileStream(downloadedFullFilePath, FileMode.Open, FileAccess.Read))
using (var decompressedFile = new Accord.IO.Compression.LzwInputStream(compressedFile))
using (var uncompressedFile = new FileStream(uncompressedFileName, FileMode.CreateNew, FileAccess.Write))
{
decompressedFile.CopyTo(uncompressedFile);
}
}
}
else
{
uncompressedFileName = downloadedFullFilePath;
}
return(true);
}
