// heavily copy-pasted from Everest.Updater!
private static void downloadMod(ModUpdateInfo update, TextMenu.Button button, string zipPath)
{
Logger.Log("UpdateChecker", $"Downloading {update.URL} to {zipPath}");
DateTime timeStart = DateTime.Now;
if (File.Exists(zipPath))
{
File.Delete(zipPath);
}
// Manual buffered copy from web input to file output.
// Allows us to measure speed and progress.
using (WebClient wc = new WebClient())
using (Stream input = wc.OpenRead(update.URL))
using (FileStream output = File.OpenWrite(zipPath)) {
long length;
if (input.CanSeek)
{
length = input.Length;
}
else
{
length = _ContentLength(update.URL);
}
byte[] buffer = new byte[4096];
DateTime timeLastSpeed = timeStart;
int read = 1;
int readForSpeed = 0;
int pos = 0;
int speed = 0;
int count = 0;
TimeSpan td;
while (read > 0)
{
count = length > 0 ? (int)Math.Min(buffer.Length, length - pos) : buffer.Length;
read = input.Read(buffer, 0, count);
output.Write(buffer, 0, read);
pos += read;
readForSpeed += read;
td = DateTime.Now - timeLastSpeed;
if (td.TotalMilliseconds > 100)
{
speed = (int)((readForSpeed / 1024D) / td.TotalSeconds);
readForSpeed = 0;
timeLastSpeed = DateTime.Now;
}
if (length > 0)
{
button.Label = $"{update.Name} ({((int)Math.Floor(100D * (pos / (double)length)))}% @ {speed} KiB/s)";
}
else
{
button.Label = $"{update.Name} ({((int)Math.Floor(pos / 1000D))}KiB @ {speed} KiB/s)";
}
}
}
}
private static void installMod(ModUpdateInfo update, EverestModuleMetadata mod, string zipPath)
{
// let's close the zip, as we will replace it now.
foreach (ModContent content in Everest.Content.Mods)
{
if (content.GetType() == typeof(ZipModContent) && (content as ZipModContent).Mod.Name == mod.Name)
{
ZipModContent modZip = content as ZipModContent;
Logger.Log("UpdateChecker", $"Closing mod .zip: {modZip.Path}");
modZip.Dispose();
}
}
// delete the old zip, and move the new one.
Logger.Log("UpdateChecker", $"Deleting mod .zip: {mod.PathArchive}");
File.Delete(mod.PathArchive);
Logger.Log("UpdateChecker", $"Moving {zipPath} to {mod.PathArchive}");
File.Move(zipPath, mod.PathArchive);
}
private void downloadModUpdate(ModUpdateInfo update, EverestModuleMetadata mod, TextMenu.Button button)
{
task = new Task(() => {
// we will download the mod to Celeste_Directory/mod-update.zip at first.
string zipPath = Path.Combine(Everest.PathGame, "mod-update.zip");
try {
// download it...
button.Label = $"{update.Name} ({Dialog.Clean("UPDATECHECKER_DOWNLOADING")})";
downloadMod(update, button, zipPath);
// verify its checksum
string actualHash = BitConverter.ToString(Everest.GetChecksum("mod-update.zip")).Replace("-", "").ToLowerInvariant();
string expectedHash = update.xxHash[0];
Logger.Log("UpdateChecker", $"Verifying checksum: actual hash is {actualHash}, expected hash is {expectedHash}");
if (expectedHash != actualHash)
{
throw new IOException($"Checksum error: expected {expectedHash}, got {actualHash}");
}
// mark restarting as required, as we will do weird stuff like closing zips afterwards.
if (!shouldRestart)
{
shouldRestart = true;
subHeader.TextColor = Color.OrangeRed;
subHeader.Title = $"{Dialog.Clean("UPDATECHECKER_MENU_HEADER")} ({Dialog.Clean("UPDATECHECKER_WILLRESTART")})";
}
// install it
button.Label = $"{update.Name} ({Dialog.Clean("UPDATECHECKER_INSTALLING")})";
installMod(update, mod, zipPath);
// done!
button.Label = $"{update.Name} ({Dialog.Clean("UPDATECHECKER_UPDATED")})";
// select another enabled option: the next one, or the last one if there is no next one.
if (menu.Selection + 1 > menu.LastPossibleSelection)
{
menu.Selection = menu.LastPossibleSelection;
}
else
{
menu.Selection++;
}
} catch (Exception e) {
// update failed
button.Label = $"{update.Name} ({Dialog.Clean("UPDATECHECKER_FAILED")})";
Logger.Log("UpdateChecker", $"Updating {update.Name} failed");
Logger.LogDetailed(e);
button.Disabled = false;
// try to delete mod-update.zip if it still exists.
if (File.Exists(zipPath))
{
try {
Logger.Log("UpdateChecker", $"Deleting temp file {zipPath}");
File.Delete(zipPath);
} catch (Exception) {
Logger.Log("UpdateChecker", $"Removing {zipPath} failed");
}
}
}
// give the menu control back to the player
menu.Focused = true;
});
task.Start();
}
