public PACDaemon(PACSettings pACSettings, string workingDirectory, string dlcPath)
{
_PACSettings = pACSettings;
_geositeUpdater = new GeositeUpdater(dlcPath);
TouchPACFile();
TouchUserRuleFile();
WatchPacFile(workingDirectory);
WatchUserRuleFile(workingDirectory);
}
public async Task UpdatePACFromGeosite(PACSettings pACSettings)
{
string geositeUrl = GEOSITE_URL;
string geositeSha256sumUrl = GEOSITE_SHA256SUM_URL;
SHA256 mySHA256 = SHA256.Create();
bool blacklist = pACSettings.PACDefaultToDirect;
var httpClient = Locator.Current.GetService <HttpClient>();
if (!string.IsNullOrWhiteSpace(pACSettings.CustomGeositeUrl))
{
this.Log().Info("Found custom Geosite URL in config file");
geositeUrl = pACSettings.CustomGeositeUrl;
}
this.Log().Info($"Checking Geosite from {geositeUrl}");
try
{
// download checksum first
var geositeSha256sum = await httpClient.GetStringAsync(geositeSha256sumUrl);
geositeSha256sum = geositeSha256sum.Substring(0, 64).ToUpper();
this.Log().Info($"Got Sha256sum: {geositeSha256sum}");
// compare downloaded checksum with local geositeDB
byte[] localDBHashBytes = mySHA256.ComputeHash(geositeDB);
string localDBHash = BitConverter.ToString(localDBHashBytes).Replace("-", String.Empty);
this.Log().Info($"Local Sha256sum: {localDBHash}");
// if already latest
if (geositeSha256sum == localDBHash)
{
this.Log().Info("Local GeoSite DB is up to date.");
return;
}
// not latest. download new DB
var downloadedBytes = await httpClient.GetByteArrayAsync(geositeUrl);
// verify sha256sum
byte[] downloadedDBHashBytes = mySHA256.ComputeHash(downloadedBytes);
string downloadedDBHash = BitConverter.ToString(downloadedDBHashBytes).Replace("-", String.Empty);
this.Log().Info($"Actual Sha256sum: {downloadedDBHash}");
if (geositeSha256sum != downloadedDBHash)
{
this.Log().Info("Sha256sum Verification: FAILED. Downloaded GeoSite DB is corrupted. Aborting the update.");
throw new Exception("Sha256sum mismatch");
}
else
{
this.Log().Info("Sha256sum Verification: PASSED. Applying to local GeoSite DB.");
}
// write to geosite file
using (FileStream geositeFileStream = File.Create(DATABASE_PATH))
await geositeFileStream.WriteAsync(downloadedBytes, 0, downloadedBytes.Length);
// update stuff
geositeDB = downloadedBytes;
LoadGeositeList();
bool pacFileChanged = MergeAndWritePACFile(pACSettings.GeositeDirectGroups, pACSettings.GeositeProxiedGroups, blacklist);
UpdateCompleted?.Invoke(null, new GeositeResultEventArgs(pacFileChanged));
}
catch (Exception e)
{
this.Log().Error(e, "An error occurred while updating PAC.");
}
}