/// <summary>
/// Performs a feed search query using the <see cref="Config.FeedMirror"/>.
/// </summary>
/// <param name="config">The current configuration determining which mirror server to query.</param>
/// <param name="keywords">The keywords to search for.</param>
public static SearchQuery Perform([NotNull] Config config, [CanBeNull] string keywords)
{
#region Sanity checks
if (config == null) throw new ArgumentNullException(nameof(config));
#endregion
if (string.IsNullOrEmpty(keywords)) return new SearchQuery();
var url = new Uri(
config.FeedMirror.EnsureTrailingSlash(),
new Uri("search/?q=" + Uri.EscapeUriString(keywords), UriKind.Relative));
Log.Info("Performing search query: " + url.ToStringRfc());
using (var webClient = new WebClientTimeout())
{
var result = XmlStorage.FromXmlString<SearchQuery>(webClient.DownloadString(url));
result.Keywords = keywords;
return result;
}
}
/// <summary>
/// Adds a feed to the list of custom feeds.
/// </summary>
private void AddCustomFeed(string input)
{
FeedUri feedUri;
try
{
feedUri = new FeedUri(input);
}
catch (UriFormatException ex)
{
Msg.Inform(this, ex.Message, MsgSeverity.Error);
return;
}
if (_interfaceUri.IsFile)
{
if (!File.Exists(_interfaceUri.LocalPath))
{
Msg.Inform(this, string.Format(Resources.FileOrDirNotFound, _interfaceUri.LocalPath), MsgSeverity.Warn);
return;
}
}
else
{
Feed feed = null;
try
{
using (var handler = new GuiTaskHandler(this))
{
handler.RunTask(new SimpleTask(Resources.CheckingFeed,
delegate
{
using (var webClient = new WebClientTimeout())
feed = XmlStorage.FromXmlString<Feed>(webClient.DownloadString(feedUri));
}));
}
}
#region Error handling
catch (OperationCanceledException)
{
return;
}
catch (IOException ex)
{
Msg.Inform(this, ex.Message, MsgSeverity.Error);
return;
}
catch (InvalidDataException ex)
{
Msg.Inform(this, ex.Message, MsgSeverity.Error);
return;
}
catch (WebException ex)
{
Msg.Inform(this, ex.Message, MsgSeverity.Error);
return;
}
catch (UnauthorizedAccessException ex)
{
Msg.Inform(this, ex.Message, MsgSeverity.Error);
return;
}
#endregion
// Ensure a matching <feed-for> is present for online feeds
if (feed.FeedFor.All(entry => entry.Target != _interfaceUri))
if (!Msg.YesNo(this, Resources.IgnoreMissingFeedFor, MsgSeverity.Warn)) return;
}
var reference = new FeedReference {Source = feedUri};
if (_interfacePreferences.Feeds.Contains(reference)) return;
_interfacePreferences.Feeds.Add(reference);
listBoxFeeds.Items.Add(reference);
}
//--------------------//
#region Sync
/// <summary>
/// Synchronize the <see cref="AppList"/> with the sync server and (un)apply <see cref="AccessPoint"/>s accordingly.
/// </summary>
/// <param name="resetMode">Controls how synchronization data is reset.</param>
/// <exception cref="OperationCanceledException">The user canceled the task.</exception>
/// <exception cref="InvalidDataException">A problem occurred while deserializing the XML data or the specified crypto key was wrong.</exception>
/// <exception cref="WebException">A problem occured while communicating with the sync server or while downloading additional data (such as icons).</exception>
/// <exception cref="IOException">A problem occurs while writing to the filesystem or registry.</exception>
/// <exception cref="UnauthorizedAccessException">Write access to the filesystem or registry is not permitted.</exception>
public void Sync(SyncResetMode resetMode = SyncResetMode.None)
{
if (!_server.IsValid) throw new InvalidDataException(Resources.PleaseConfigSync);
var appListUri = new Uri(_server.Uri, new Uri(MachineWide ? "app-list-machine" : "app-list", UriKind.Relative));
using (var webClient = new WebClientTimeout
{
Credentials = _server.Credentials,
CachePolicy = new RequestCachePolicy(RequestCacheLevel.NoCacheNoStore)
})
{
ExceptionUtils.Retry<WebRaceConditionException>(delegate
{
Handler.CancellationToken.ThrowIfCancellationRequested();
byte[] appListData;
try
{
appListData = DownloadAppList(appListUri, webClient, resetMode);
}
#region Error handling
catch (WebException ex)
when (ex.Status == WebExceptionStatus.ProtocolError && (ex.Response as HttpWebResponse)?.StatusCode == HttpStatusCode.Unauthorized)
{
Handler.CancellationToken.ThrowIfCancellationRequested();
throw new WebException(Resources.SyncCredentialsInvalid, ex, ex.Status, ex.Response);
}
#endregion
HandleDownloadedAppList(resetMode, appListData);
try
{
UploadAppList(appListUri, webClient, resetMode);
}
#region Error handling
catch (WebException ex)
when (ex.Status == WebExceptionStatus.ProtocolError && (ex.Response as HttpWebResponse)?.StatusCode == HttpStatusCode.PreconditionFailed)
{
Handler.CancellationToken.ThrowIfCancellationRequested();
throw new WebRaceConditionException(ex);
}
#endregion
}, maxRetries: 3);
}
// Save reference point for future syncs
AppList.SaveXml(AppListPath + AppListLastSyncSuffix);
Handler.CancellationToken.ThrowIfCancellationRequested();
}
/// <summary>
/// Synchronize the <see cref="AppList"/> with the sync server and (un)apply <see cref="AccessPoint"/>s accordingly.
/// </summary>
/// <param name="resetMode">Controls how synchronization data is reset.</param>
/// <exception cref="OperationCanceledException">The user canceled the task.</exception>
/// <exception cref="InvalidDataException">A problem occurred while deserializing the XML data or if the specified crypto key was wrong.</exception>
/// <exception cref="WebException">A problem occured while downloading additional data (such as icons).</exception>
/// <exception cref="IOException">A problem occurs while writing to the filesystem or registry.</exception>
/// <exception cref="UnauthorizedAccessException">Write access to the filesystem or registry is not permitted.</exception>
public void Sync(SyncResetMode resetMode)
{
if (!_server.IsValid) throw new InvalidDataException(Resources.PleaseConfigSync);
var appListUri = new Uri(_server.Uri, new Uri(MachineWide ? "app-list-machine" : "app-list", UriKind.Relative));
using (var webClient = new WebClientTimeout
{
Credentials = _server.Credentials,
CachePolicy = new RequestCachePolicy(RequestCacheLevel.NoCacheNoStore)
})
{
ExceptionUtils.Retry<TimeoutException>(delegate
{
Handler.CancellationToken.ThrowIfCancellationRequested();
byte[] appListData;
try
{
appListData = DownloadAppList(appListUri, webClient, resetMode);
}
#region Error handling
catch (WebException ex)
{
switch (ex.Status)
{
case WebExceptionStatus.ProtocolError:
var response = ex.Response as HttpWebResponse;
if (response != null && response.StatusCode == HttpStatusCode.Unauthorized)
throw new WebException(Resources.SyncCredentialsInvalid, ex);
else throw;
case WebExceptionStatus.Timeout:
throw new TimeoutException(ex.Message, ex);
default:
if (ex.InnerException != null && ex.InnerException.InnerException is FileNotFoundException) appListData = new byte[0];
else throw;
break;
}
}
#endregion
HandleDownloadedAppList(resetMode, appListData);
try
{
UploadAppList(appListUri, webClient, resetMode);
}
#region Error handling
catch (WebException ex)
{
if (ex.Status == WebExceptionStatus.ProtocolError)
{
var response = ex.Response as HttpWebResponse;
if (response != null && response.StatusCode == HttpStatusCode.PreconditionFailed)
{
Handler.CancellationToken.ThrowIfCancellationRequested();
throw new TimeoutException("Race condition encountered while syncing.");
}
}
else throw;
}
#endregion
}, maxRetries: 3);
}
// Save reference point for future syncs
AppList.SaveXml(AppListPath + AppListLastSyncSuffix);
Handler.CancellationToken.ThrowIfCancellationRequested();
}
private void CheckCryptoKey()
{
var appListUri = new Uri(_server.Uri, new Uri("app-list", UriKind.Relative));
using (var webClient = new WebClientTimeout
{
Credentials = _server.Credentials,
CachePolicy = new RequestCachePolicy(RequestCacheLevel.NoCacheNoStore)
})
{
try
{
AppList.LoadXmlZip(new MemoryStream(webClient.DownloadData(appListUri)), _cryptoKey);
}
#region Error handling
catch (WebException ex)
when (ex.Status == WebExceptionStatus.ProtocolError && (ex.Response as HttpWebResponse)?.StatusCode == HttpStatusCode.Unauthorized)
{
// Wrap exception to add context information
throw new WebException(Resources.SyncCredentialsInvalid, ex, ex.Status, ex.Response);
}
catch (ZipException ex)
{
// Wrap exception to add context information
if (ex.Message == "Invalid password for AES") throw new InvalidDataException(Resources.SyncCryptoKeyInvalid);
else throw new InvalidDataException(Resources.SyncServerDataDamaged, ex);
}
#endregion
}
}
