/// <summary>
/// Attempts to download a patchlist from a given url, then read as string and returned to caller.
/// If download failed, will throw an exception.
/// </summary>
/// <param name="url"></param>
/// <param name="attempts">Causes the download to be retried as much as the number allows, with exponential backoff algorithm.</param>
/// <returns></returns>
private async Task <string> DownloadPatchlist(string url, int attempts = 4)
{
if (attempts < 1)
{
attempts = 1;
}
for (int i = 0; i < attempts; i++)
{
await ExponentialBackoff(i, url);
var client = new AquaClient();
var download = client.DownloadStringTaskAsync(url);
Output.OnDownloadStart(url, client);
try
{
var response = await download;
if (string.IsNullOrEmpty(response))
{
throw new Exception("Empty response!");
}
Output.OnDownloadFinish(url);
return(response);
}
catch (Exception Ex)
{
Output.AppendLog($"Download failed {url} because: {Ex.Message}");
}
}
Output.OnDownloadAborted(url);
throw new Exception("Unable to download " + url);
}
/// <summary>
/// Attempts to download a patch into a target directory.
/// </summary>
/// <param name="target"></param>
/// <param name="directory"></param>
/// <param name="successLog">If provided, will write a line containing the patch file name then flush immediately into the log when a download is successful.</param>
/// <param name="attempts">Causes the download to be retried as much as the number allows, with exponential backoff algorithm</param>
/// <returns>True if download is successful, else false.</returns>
public async Task <bool> DownloadGamePatch(PatchInfo target, string directory, StreamWriter successLog = null, int attempts = 4)
{
if (SkipList.Contains(target.File))
{
Output.AppendLog($"Skipping download: {target.File}");
return(true);
}
if (attempts < 1)
{
attempts = 1;
}
var file = Path.Combine(directory, target.File);
var folder = new FileInfo(file).DirectoryName;
//Directory.CreateDirectory(folder);
var baseUrl = target.Old ? OldPatchBaseUrl : PatchBaseUrl;
var url = baseUrl + target.File + ".pat";
for (int i = 0; i < attempts; i++)
{
await ExponentialBackoff(i, url);
var client = new AquaClient();
var download = client.DownloadFileTaskAsync(url, file);
Output.AppendLog($"Downloading a file from {url} to {file}");
Output.OnDownloadStart(url, client);
try
{
await download;
if (new FileInfo(file).Length == 0)
{
throw new Exception("Empty response!");
}
Output.OnDownloadFinish(url);
if (successLog != null)
{
lock (UpdateManager.DownloadSuccessLogLock)
{
successLog.WriteLine(target.File);
successLog.Flush();
}
}
return(true);
}
catch (Exception Ex)
{
Output.AppendLog($"Download failed {url} because: {Ex.Message}");
}
}
Output.OnDownloadAborted(url);
return(false);
//throw new Exception("Unable to download " + url);
}