IObservable <UpdateInfo> checkForUpdate(bool ignoreDeltaUpdates = false, IObserver <int> progress = null) { var localReleases = Enumerable.Empty <ReleaseEntry>(); progress = progress ?? new Subject <int>(); try { var file = fileSystem.GetFileInfo(LocalReleaseFile).OpenRead(); // NB: sr disposes file using (var sr = new StreamReader(file, Encoding.UTF8)) { localReleases = ReleaseEntry.ParseReleaseFile(sr.ReadToEnd()); } } catch (Exception ex) { // Something has gone wrong, we'll start from scratch. log.WarnException("Failed to load local release list", ex); initializeClientAppDirectory(); } IObservable <string> releaseFile; // Fetch the remote RELEASES file, whether it's a local dir or an // HTTP URL try { if (isHttpUrl(updateUrlOrPath)) { log.Info("Downloading RELEASES file from {0}", updateUrlOrPath); releaseFile = urlDownloader.DownloadUrl(String.Format("{0}/{1}", updateUrlOrPath, "RELEASES"), progress) .Catch <string, TimeoutException>(ex => { log.Info("Download timed out (returning blank release list)"); return(Observable.Return(String.Empty)); }) .Catch <string, WebException>(ex => { log.InfoException("Download resulted in WebException (returning blank release list)", ex); return(Observable.Return(String.Empty)); }); } else { log.Info("Reading RELEASES file from {0}", updateUrlOrPath); if (!fileSystem.GetDirectoryInfo(updateUrlOrPath).Exists) { var message = String.Format( "The directory {0} does not exist, something is probably broken with your application", updateUrlOrPath); var ex = new SquirrelConfigurationException(message); return(Observable.Throw <UpdateInfo>(ex)); } var fi = fileSystem.GetFileInfo(Path.Combine(updateUrlOrPath, "RELEASES")); if (!fi.Exists) { var message = String.Format( "The file {0} does not exist, something is probably broken with your application", fi.FullName); log.Warn(message); var packages = fileSystem.GetDirectoryInfo(updateUrlOrPath).GetFiles("*.nupkg"); if (packages.Length == 0) { var ex = new SquirrelConfigurationException(message); return(Observable.Throw <UpdateInfo>(ex)); } // NB: Create a new RELEASES file since we've got a directory of packages ReleaseEntry.WriteReleaseFile( packages.Select(x => ReleaseEntry.GenerateFromFile(x.FullName)), fi.FullName); } using (var sr = new StreamReader(fi.OpenRead(), Encoding.UTF8)) { var text = sr.ReadToEnd(); releaseFile = Observable.Return(text); } progress.OnNext(100); progress.OnCompleted(); } } catch (Exception ex) { progress.OnCompleted(); return(Observable.Throw <UpdateInfo>(ex)); } // Return null if no updates found var ret = releaseFile .Select(ReleaseEntry.ParseReleaseFile) .SelectMany(releases => releases.Any() ? determineUpdateInfo(localReleases, releases, ignoreDeltaUpdates) : Observable.Return <UpdateInfo>(null)) .PublishLast(); ret.Connect(); return(ret); }
IObservable<UpdateInfo> checkForUpdate(bool ignoreDeltaUpdates = false, IObserver<int> progress = null) { var localReleases = Enumerable.Empty<ReleaseEntry>(); progress = progress ?? new Subject<int>(); try { var file = fileSystem.GetFileInfo(LocalReleaseFile).OpenRead(); // NB: sr disposes file using (var sr = new StreamReader(file, Encoding.UTF8)) { localReleases = ReleaseEntry.ParseReleaseFile(sr.ReadToEnd()); } } catch (Exception ex) { // Something has gone wrong, we'll start from scratch. log.WarnException("Failed to load local release list", ex); initializeClientAppDirectory(); } IObservable<string> releaseFile; // Fetch the remote RELEASES file, whether it's a local dir or an // HTTP URL try { if (isHttpUrl(updateUrlOrPath)) { log.Info("Downloading RELEASES file from {0}", updateUrlOrPath); releaseFile = urlDownloader.DownloadUrl(String.Format("{0}/{1}", updateUrlOrPath, "RELEASES"), progress); } else { log.Info("Reading RELEASES file from {0}", updateUrlOrPath); if (!fileSystem.GetDirectoryInfo(updateUrlOrPath).Exists) { var message = String.Format( "The directory {0} does not exist, something is probably broken with your application", updateUrlOrPath); var ex = new SquirrelConfigurationException(message); return Observable.Throw<UpdateInfo>(ex); } var fi = fileSystem.GetFileInfo(Path.Combine(updateUrlOrPath, "RELEASES")); if (!fi.Exists) { var message = String.Format( "The file {0} does not exist, something is probably broken with your application", fi.FullName); log.Warn(message); var packages = fileSystem.GetDirectoryInfo(updateUrlOrPath).GetFiles("*.nupkg"); if (packages.Length == 0) { var ex = new SquirrelConfigurationException(message); return Observable.Throw<UpdateInfo>(ex); } // NB: Create a new RELEASES file since we've got a directory of packages ReleaseEntry.WriteReleaseFile( packages.Select(x => ReleaseEntry.GenerateFromFile(x.FullName)), fi.FullName); } using (var sr = new StreamReader(fi.OpenRead(), Encoding.UTF8)) { var text = sr.ReadToEnd(); releaseFile = Observable.Return(text); } progress.OnNext(100); progress.OnCompleted(); } } catch (Exception ex) { progress.OnCompleted(); return Observable.Throw<UpdateInfo>(ex); } var ret = releaseFile .Select(ReleaseEntry.ParseReleaseFile) .SelectMany(releases => determineUpdateInfo(localReleases, releases, ignoreDeltaUpdates)) .PublishLast(); ret.Connect(); return ret; }