public static void OfflineDownload(string url, string path, CookieAwareWebClient client = null)
{
FileStream fileStream = null;
OfflineDownloadTask task = null;
try
{
var retried = false;
retry:
var request = WebRequest.Create(url);
var httpWebRequest = request as HttpWebRequest;
if (httpWebRequest != null)
{
httpWebRequest.Referer = url;
httpWebRequest.ReadWriteTimeout = Timeout.Infinite;
if (client != null) client.ProcessRequest(request);
}
request.Timeout = Timeout.Infinite;
var response = request.GetResponse();
if (!retried && url.StartsWith("http://goo.im", true, CultureInfo.InvariantCulture)
&& response.ContentType == "text/html")
{
retried = true;
Thread.Sleep(15000);
goto retry;
}
var stream = response.GetResponseStream();
var disposition = response.Headers["Content-Disposition"] ?? string.Empty;
var pos = disposition.IndexOf("filename=", StringComparison.Ordinal);
long? fileLength;
if (stream.CanSeek) fileLength = stream.Length;
else
try
{
fileLength = response.ContentLength;
}
catch
{
fileLength = null;
}
if (fileLength < 0) fileLength = null;
var fileName = (pos >= 0 ? disposition.Substring(pos + 9).Trim('"', '\'').UrlDecode()
: GetFileName(url)).ToValidPath();
string mime, extension;
try
{
mime = Helper.GetMime(response.ContentType);
extension = Helper.GetDefaultExtension(mime);
}
catch
{
extension = Path.GetExtension(fileName);
mime = Helper.GetDefaultExtension(extension);
}
if (Directory.Exists(FileHelper.GetFilePath(path)))
{
if (!string.IsNullOrEmpty(extension) && !fileName.EndsWith(extension, StringComparison.Ordinal))
fileName += extension;
path = FileHelper.Combine(path, fileName);
}
task = new OfflineDownloadTask(url, path) { PID = Process.GetCurrentProcess().Id };
if (!string.IsNullOrWhiteSpace(mime)) task.Mime = mime;
if (fileLength != null) task.FileLength = fileLength;
task.Save();
stream.CopyTo(fileStream = File.Create(FileHelper.GetFilePath(path)));
task.Finish();
}
catch (Exception exc)
{
if (task == null) throw;
task.ErrorMessage = exc.Message;
task.Save();
if (client != null) throw;
}
finally
{
if (fileStream != null) fileStream.Close();
}
}
public static void OfflineDownload(string url, string path, CookieAwareWebClient client = null)
{
FileStream fileStream = null;
OfflineDownloadTask task = null;
try
{
var retried = false;
retry:
var request = WebRequest.Create(url);
var httpWebRequest = request as HttpWebRequest;
if (httpWebRequest != null)
{
httpWebRequest.Referer = url;
httpWebRequest.ReadWriteTimeout = Timeout.Infinite;
if (client != null)
{
client.ProcessRequest(request);
}
}
request.Timeout = Timeout.Infinite;
var response = request.GetResponse();
if (!retried && url.StartsWith("http://goo.im", true, CultureInfo.InvariantCulture) &&
response.ContentType == "text/html")
{
retried = true;
Thread.Sleep(15000);
goto retry;
}
var stream = response.GetResponseStream();
var disposition = response.Headers["Content-Disposition"] ?? string.Empty;
var pos = disposition.IndexOf("filename=", StringComparison.Ordinal);
long?fileLength;
if (stream.CanSeek)
{
fileLength = stream.Length;
}
else
{
try
{
fileLength = response.ContentLength;
}
catch
{
fileLength = null;
}
}
if (fileLength < 0)
{
fileLength = null;
}
var fileName = (pos >= 0 ? disposition.Substring(pos + 9).Trim('"', '\'').UrlDecode()
: GetFileName(url)).ToValidPath();
string mime, extension;
try
{
mime = Helper.GetMime(response.ContentType);
extension = Helper.GetDefaultExtension(mime);
}
catch
{
extension = Path.GetExtension(fileName);
mime = Helper.GetDefaultExtension(extension);
}
if (Directory.Exists(FileHelper.GetFilePath(path)))
{
if (!string.IsNullOrEmpty(extension) && !fileName.EndsWith(extension, StringComparison.Ordinal))
{
fileName += extension;
}
path = FileHelper.Combine(path, fileName);
}
task = new OfflineDownloadTask(url, path)
{
PID = Process.GetCurrentProcess().Id
};
if (!string.IsNullOrWhiteSpace(mime))
{
task.Mime = mime;
}
if (fileLength != null)
{
task.FileLength = fileLength;
}
task.Save();
stream.CopyTo(fileStream = File.Create(FileHelper.GetFilePath(path)));
task.Finish();
}
catch (Exception exc)
{
if (task == null)
{
throw;
}
task.ErrorMessage = exc.Message;
task.Save();
if (client != null)
{
throw;
}
}
finally
{
if (fileStream != null)
{
fileStream.Close();
}
}
}