public FileInfo DownloadFileFromURLToPath(string url, string path, long fileSize)
{
if (comms.Cancel)
{
return(null);
}
if (string.IsNullOrEmpty(url) || string.IsNullOrEmpty(path))
{
return(null);
}
downloadHandler.DownloadedFilePath = path;
downloadHandler.DownloadedFilename = Path.GetFileName(path);
downloadHandler.DownloadedFileSize = fileSize;
if (comms.LogProgress)
{
downloadHandler.Progress = new DownloadProgress(downloadHandler);
comms.SetProgress(downloadHandler.Progress);
}
if (IsGoogleDriveURL(url))
{
url = PatchUtils.GetGoogleDriveDownloadLinkFromUrl(url);
verifyDownloadSize = false;
return(DownloadGoogleDriveFileFromURLToPath(url, path));
}
else
{
verifyDownloadSize = true;
return(DownloadFileFromURLToPathInternal(url, path));
}
}
public string DownloadTextFromURL(string url)
{
if (string.IsNullOrEmpty(url))
{
return(null);
}
if (IsGoogleDriveURL(url))
{
url = PatchUtils.GetGoogleDriveDownloadLinkFromUrl(url);
}
for (int i = 0; i < PatchParameters.FailedDownloadsRetryLimit; i++)
{
if (comms.Cancel)
{
return(null);
}
try
{
var syncObject = new object();
lock ( syncObject )
{
downloadHandler.DownloadString(url, syncObject);
Monitor.Wait(syncObject);
}
if (comms.Cancel)
{
return(null);
}
if (downloadStringResult == null)
{
Thread.Sleep(PatchParameters.FailedDownloadsCooldownMillis);
continue;
}
return(downloadStringResult);
}
catch (WebException e)
{
comms.LogToFile(e);
Thread.Sleep(PatchParameters.FailedDownloadsCooldownMillis);
}
catch (UriFormatException e)
{
comms.LogToFile(e);
return(null);
}
}
return(null);
}
// Credit: http://stackoverflow.com/questions/1460273/how-to-check-if-a-file-exists-on-an-webserver-by-its-url
// Credit: http://stackoverflow.com/questions/3614034/system-net-webexception-http-status-code
public bool FileExistsAtUrl(string url, out long fileSize)
{
if (string.IsNullOrEmpty(url))
{
fileSize = 0L;
return(false);
}
if (IsGoogleDriveURL(url))
{
url = PatchUtils.GetGoogleDriveDownloadLinkFromUrl(url);
}
WebRequest request = WebRequest.Create(url);
request.Method = "HEAD";
request.Timeout = PatchParameters.FileAvailabilityCheckTimeout;
try
{
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
fileSize = response.ContentLength;
return(response.StatusCode == HttpStatusCode.OK);
}
}
catch (WebException e)
{
fileSize = 0L;
if (e.Response != null && e.Response is HttpWebResponse)
{
using (HttpWebResponse exResponse = (HttpWebResponse)e.Response)
{
if (exResponse.StatusCode == HttpStatusCode.ServiceUnavailable)
{
// Drive returns 503 error while requesting HEAD for valid download links
if (IsGoogleDriveURL(url))
{
return(true);
}
}
}
}
comms.LogToFile(e);
return(false);
}
}
