/// <summary>
/// If we can successfully download the update version table for the current channel,
/// we return true and set the TextContentsOfTable property. Otherwise we return false and
/// an UpdateTableLookupResult with an embedded error as an 'out' param.
/// This internal method enables testing of captive portal situations
/// </summary>
/// <param name="client"></param>
/// <param name="errorResult"></param>
/// <returns></returns>
internal bool CanGetVersionTableFromWeb(IBloomWebClient client, out UpdateTableLookupResult errorResult)
{
errorResult = null;
try
{
Logger.WriteEvent("Channel is '" + ApplicationUpdateSupport.ChannelName + "'");
Logger.WriteEvent("UpdateVersionTable looking for UpdateVersionTable URL: " + GetUrlOfTable());
TextContentsOfTable = client.DownloadString(GetUrlOfTable());
//things like captive portals will return an html page rather than the text file what we asked for, if the user isn't
//logged in.
if (TextContentsOfTable.ToLower().Contains("<html"))
{
LogTableContents();
var msg = "Internet connection did not allow check for update.";
NonFatalProblem.Report(ModalIf.Alpha, PassiveIf.All, msg); // hopefully this will just 'toast'
errorResult = new UpdateTableLookupResult {
URL = string.Empty, Error = new WebException(msg)
};
return(false);
}
}
catch (WebException e)
{
Logger.WriteEvent("***Error (WebException) in CanGetVersionTableFromWeb: " + e.Message);
if (e.Status == WebExceptionStatus.ProtocolError)
{
if (e.Response is HttpWebResponse resp && resp.StatusCode == HttpStatusCode.NotFound)
{
Logger.WriteEvent(
$"***Error: UpdateVersionTable failed to find a file at {GetUrlOfTable()} (channel='{ApplicationUpdateSupport.ChannelName}'");
}
}
else if (IsConnectionError(e))
{
Logger.WriteEvent("***Error: UpdateVersionTable could not connect to the server");
}
errorResult = new UpdateTableLookupResult()
{
Error = e
};
return(false);
}
catch (Exception e)
{
// We're getting some kind of exception thrown on some alpha users' machines, but we don't know why (BL-9211).
// It isn't a WebException. I'm adding this catch block at least long enough to diagnose the problem,
// but it is probably better to be here, anyway, since without it, Bloom crashes silently.
Logger.WriteError("***Error (Exception) in CanGetVersionTableFromWeb:", e);
errorResult = new UpdateTableLookupResult()
{
Error = new WebException(e.Message)
};
return(false);
}
return(true); // no error yet anyway!
}
/// <summary>
/// If we can successfully download the update version table for the current channel,
/// we return true and set the TextContentsOfTable property. Otherwise we return false and
/// an UpdateTableLookupResult with an embedded error as an 'out' param.
/// This internal method enables testing of captive portal situations
/// </summary>
/// <param name="client"></param>
/// <param name="errorResult"></param>
/// <returns></returns>
internal bool CanGetVersionTableFromWeb(IBloomWebClient client, out UpdateTableLookupResult errorResult)
{
errorResult = null;
try
{
Logger.WriteEvent("Channel is '" + ApplicationUpdateSupport.ChannelName + "'");
Logger.WriteEvent("UpdateVersionTable looking for UpdateVersionTable URL: " + GetUrlOfTable());
TextContentsOfTable = client.DownloadString(GetUrlOfTable());
//things like captive portals will return an html page rather than the text file what we asked for, if the user isn't
//logged in.
if (TextContentsOfTable.ToLower().Contains("<html"))
{
LogTableContents();
var msg = "Internet connection did not allow check for update.";
NonFatalProblem.Report(ModalIf.Alpha, PassiveIf.All, msg); // hopefully this will just 'toast'
errorResult = new UpdateTableLookupResult {
URL = string.Empty, Error = new WebException(msg)
};
return(false);
}
}
catch (WebException e)
{
Logger.WriteEvent("***Error in LookupURLOfUpdate: " + e.Message);
if (e.Status == WebExceptionStatus.ProtocolError)
{
var resp = e.Response as HttpWebResponse;
if (resp != null && resp.StatusCode == HttpStatusCode.NotFound)
{
Logger.WriteEvent(String.Format("***Error: UpdateVersionTable failed to find a file at {0} (channel='{1}'",
GetUrlOfTable(), ApplicationUpdateSupport.ChannelName));
}
}
else if (IsConnectionError(e))
{
Logger.WriteEvent("***Error: UpdateVersionTable could not connect to the server");
}
errorResult = new UpdateTableLookupResult()
{
Error = e
};
return(false);
}
return(true); // no error yet anyway!
}
