#pragma warning disable CS1998
static async Task DoDownload(FileStream fs, Stream webStream, DownloadStatus status)
{
var buf = new byte [16384];
int nread;
Log.DebugLine("Downloading...");
while ((nread = webStream.Read(buf, 0, buf.Length)) > 0)
{
status.Update((ulong)nread);
fs.Write(buf, 0, nread);
}
fs.Flush();
}
protected override async Task <bool> Execute(Context context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
Uri nugetUrl = Configurables.Urls.NugetUri;
string localNugetPath = Configurables.Paths.LocalNugetPath;
if (Utilities.FileExists(localNugetPath))
{
Log.StatusLine($"NuGet already downloaded ({localNugetPath})");
return(true);
}
Utilities.CreateDirectory(Path.GetDirectoryName(localNugetPath));
Log.StatusLine("Downloading NuGet");
(bool success, ulong size, HttpStatusCode status) = await Utilities.GetDownloadSizeWithStatus(nugetUrl);
if (!success)
{
if (status == HttpStatusCode.NotFound)
{
Log.ErrorLine("NuGet URL not found");
}
else
{
Log.ErrorLine("Failed to obtain NuGet size. HTTP status code: {status} ({(int)status})");
}
return(false);
}
DownloadStatus downloadStatus = Utilities.SetupDownloadStatus(context, size, context.InteractiveSession);
Log.StatusLine($" {context.Characters.Link} {nugetUrl}", ConsoleColor.White);
await Download(context, nugetUrl, localNugetPath, "NuGet", Path.GetFileName(localNugetPath), downloadStatus);
if (!File.Exists(localNugetPath))
{
Log.ErrorLine($"Download of NuGet from {nugetUrl} failed");
return(false);
}
return(true);
}
static async Task DoDownload(Uri url, string targetFile, DownloadStatus status)
{
using (var httpClient = new HttpClient()) {
httpClient.Timeout = WebRequestTimeout;
Log.DebugLine("Calling GetAsync");
HttpResponseMessage resp = await httpClient.GetAsync(url, HttpCompletionOption.ResponseHeadersRead);
Log.DebugLine("GetAsync finished");
resp.EnsureSuccessStatusCode();
string dir = Path.GetDirectoryName(targetFile);
CreateDirectory(dir);
using (var fs = File.Open(targetFile, FileMode.Create, FileAccess.Write)) {
using (var webStream = await resp.Content.ReadAsStreamAsync()) {
status.Start();
WriteWithProgress(fs, webStream, status);
}
}
}
}
public static async Task <bool> Download(Uri url, string targetFile, DownloadStatus status)
{
if (url == null)
{
throw new ArgumentNullException(nameof(url));
}
if (String.IsNullOrEmpty(targetFile))
{
throw new ArgumentException("must not be null or empty", nameof(targetFile));
}
if (status == null)
{
throw new ArgumentNullException(nameof(status));
}
using (var httpClient = new HttpClient()) {
httpClient.Timeout = WebRequestTimeout;
HttpResponseMessage resp;
try {
Log.DebugLine("Calling GetAsync");
resp = await httpClient.GetAsync(url, HttpCompletionOption.ResponseHeadersRead);
Log.DebugLine("GetAsync finished");
} catch (Exception ex) {
Log.DebugLine($"Exception: {ex}");
throw;
}
resp.EnsureSuccessStatusCode();
string dir = Path.GetDirectoryName(targetFile);
CreateDirectory(dir);
using (var fs = File.Open(targetFile, FileMode.Create, FileAccess.Write)) {
using (var webStream = await resp.Content.ReadAsStreamAsync()) {
status.Start();
await DoDownload(fs, webStream, status);
}
}
}
return(true);
}
async Task <bool> DownloadCorretto(Context context, string localPackagePath, Uri url)
{
if (File.Exists(localPackagePath))
{
if (await Utilities.VerifyArchive(localPackagePath))
{
Log.StatusLine("Corretto archive already downloaded and valid");
return(true);
}
Utilities.DeleteFileSilent(localPackagePath);
}
Log.StatusLine("Downloading Corretto from ", url.ToString(), tailColor: ConsoleColor.White);
(bool success, ulong size, HttpStatusCode status) = await Utilities.GetDownloadSizeWithStatus(url);
if (!success)
{
if (status == HttpStatusCode.NotFound)
{
Log.ErrorLine("Corretto archive URL not found");
}
else
{
Log.ErrorLine($"Failed to obtain Corretto size. HTTP status code: {status} ({(int)status})");
}
return(false);
}
DownloadStatus downloadStatus = Utilities.SetupDownloadStatus(context, size, context.InteractiveSession);
Log.StatusLine($" {context.Characters.Link} {url}", ConsoleColor.White);
await Download(context, url, localPackagePath, "Corretto", Path.GetFileName(localPackagePath), downloadStatus);
if (!File.Exists(localPackagePath))
{
Log.ErrorLine($"Download of Corretto from {url} failed.");
return(false);
}
return(true);
}
public static async Task <bool> Download(Uri url, string targetFile, DownloadStatus status)
{
if (url == null)
{
throw new ArgumentNullException(nameof(url));
}
if (String.IsNullOrEmpty(targetFile))
{
throw new ArgumentException("must not be null or empty", nameof(targetFile));
}
if (status == null)
{
throw new ArgumentNullException(nameof(status));
}
bool succeeded = false;
const int retries = 5;
for (int i = 0; i < retries; i++)
{
try {
await DoDownload(url, targetFile, status);
succeeded = true;
break;
} catch (Exception ex) {
Log.DebugLine($"Exception: {ex}");
if (i < retries - 1)
{
Log.StatusLine($"'{ex.Message}'. Retrying...", ConsoleColor.Yellow);
await Task.Delay(1000);
}
}
}
return(succeeded);
}
protected override async Task <bool> Execute(Context context)
{
if (context.ForceRuntimesBuild)
{
if (osSupportsMonoBuild)
{
Log.InfoLine("Rebuilding Mono runtimes as requested");
return(false);
}
Log.InfoLine($"Forced Mono runtimes rebuild requested but rebuilding on {context.OS.Type} is currently not supported.");
}
string localPackagePath = Configurables.Paths.BundleArchivePath;
Log.DebugLine($"Local bundle path: {localPackagePath}");
if (await Utilities.VerifyArchive(localPackagePath))
{
Log.StatusLine("Xamarin.Android Bundle archive already downloaded and valid");
}
else
{
if (!String.IsNullOrEmpty(context.XABundlePath))
{
// User indicated they wanted to use a specific bundle that's supposed to be on disk. It's not (or
// it's invalid) and that means we have no way of getting it - we can't download the default one
// since that was not the intention behind overriding the location. Thus, we error out.
Log.DebugLine($"Bundle directory from command line: {context.XABundlePath}");
throw new InvalidOperationException($"Xamarin.Android bundle indicated on the command line does not exist ({context.XABundlePath})");
}
var bundleUrl = new Uri(BundleUriPrefix, BundleFileName);
Log.StatusLine("Bundle URL: ", $"{bundleUrl}", tailColor: ConsoleColor.Cyan);
HttpStatusCode status;
bool success;
ulong size;
(success, size, status) = await Utilities.GetDownloadSizeWithStatus(bundleUrl);
if (!success)
{
if (status == HttpStatusCode.NotFound)
{
if (osSupportsMonoBuild)
{
Log.StatusLine(" not found, will need to rebuild");
}
else
{
Log.ErrorLine($" not found, rebuilding on {context.OS.Type} is not currently supported");
}
return(false);
}
if (String.IsNullOrEmpty(bundle404Message))
{
throw new InvalidOperationException($"Failed to access bundle at {bundleUrl} (HTTP status: {status})");
}
else
{
throw new InvalidOperationException(bundle404Message);
}
}
DownloadStatus downloadStatus = Utilities.SetupDownloadStatus(context, size, context.InteractiveSession);
Log.StatusLine($" {context.Characters.Link} {bundleUrl}", ConsoleColor.White);
await Download(context, bundleUrl, localPackagePath, "Xamarin.Android Bundle", Path.GetFileName(localPackagePath), downloadStatus);
if (!File.Exists(localPackagePath))
{
Log.ErrorLine($"Download of Xamarin.Android Bundle from {bundleUrl} failed.");
return(false);
}
}
Log.StatusLine($"Unpacking bundle to {Utilities.GetRelativePath (BuildPaths.XamarinAndroidSourceRoot, Configurables.Paths.BundleInstallDir)}");
string tempDir = $"{Configurables.Paths.BundleInstallDir}-bundle.temp";
try {
if (!await Utilities.Unpack(localPackagePath, tempDir, cleanDestinatioBeforeUnpacking: true))
{
Log.WarningLine("Failed to unpack bundle, will need to rebuild");
return(false);
}
Log.DebugLine($"Moving unpacked bundle from {tempDir} to {Configurables.Paths.BundleInstallDir}");
Utilities.MoveDirectoryContentsRecursively(tempDir, Configurables.Paths.BundleInstallDir, resetFileTimestamp: true, ignoreDeletionErrors: true);
} finally {
Utilities.DeleteDirectorySilent(tempDir);
}
string managedRuntime = context.Properties.GetRequiredValue(KnownProperties.ManagedRuntime);
bool haveManagedRuntime = !String.IsNullOrEmpty(managedRuntime);
if (!await Utilities.BuildRemapRef(context, haveManagedRuntime, managedRuntime))
{
return(false);
}
Utilities.PropagateXamarinAndroidCecil(context);
if (String.IsNullOrEmpty(context.XABundleCopyDir))
{
return(HaveEverything());
}
string destPackagePath = Path.Combine(context.XABundleCopyDir, Path.GetFileName(localPackagePath));
Log.DebugLine($"Copy of the XA bundle was requested to be created at {destPackagePath}");
if (Utilities.FileExists(destPackagePath))
{
Log.DebugLine("Bundle copy already exists");
return(HaveEverything());
}
// Utilities.FileExists above will return `false` for a dangling symlink at `destPackagePath`, doesn't hurt
// to remove it here just in case
Utilities.DeleteFileSilent(destPackagePath);
Utilities.CopyFile(localPackagePath, destPackagePath);
return(HaveEverything());
bool HaveEverything()
{
bool ret = MonoRuntimesHelpers.AllBundleItemsPresent(new Runtimes());
if (!ret)
{
Log.Instance.StatusLine($"Some bundle files are missing, download/rebuild/reinstall forced");
}
return(ret);
}
}
protected override async Task <bool> Execute(Context context)
{
string localPackagePath = Configurables.Paths.AntArchivePath;
if (await Utilities.VerifyArchive(localPackagePath))
{
Log.StatusLine("Ant archive already downloaded and valid");
}
else
{
Uri antUrl = new Uri(Configurables.Urls.AntBaseUri, Configurables.Paths.AntArchiveName);
Log.StatusLine("Ant URL: ", $"{antUrl}", tailColor: ConsoleColor.Cyan);
HttpStatusCode status;
bool success;
ulong size;
(success, size, status) = await Utilities.GetDownloadSizeWithStatus(antUrl);
if (!success)
{
Log.ErrorLine($"Failed to access Ant at {antUrl} (HTTP status: {status})");
return(false);
}
DownloadStatus downloadStatus = Utilities.SetupDownloadStatus(context, size, context.InteractiveSession);
Log.StatusLine($" {context.Characters.Link} {antUrl}", ConsoleColor.White);
await Download(context, antUrl, localPackagePath, "Apache Ant", Path.GetFileName(localPackagePath), downloadStatus);
if (!File.Exists(localPackagePath))
{
Log.ErrorLine($"Download of Xamarin.Android Bundle from {antUrl} failed.");
return(false);
}
}
Log.StatusLine($"Unpacking Ant to {Configurables.Paths.AntInstallDir}");
string tempDir = $"{Configurables.Paths.AntInstallDir}-ant.temp";
try {
if (!await Utilities.Unpack(localPackagePath, tempDir, cleanDestinatioBeforeUnpacking: true))
{
Log.ErrorLine("Failed to unpack Ant");
return(false);
}
Log.DebugLine($"Moving unpacked Ant from {tempDir} to {Configurables.Paths.AntInstallDir}");
// There should be just a single subdirectory
List <string> subdirs = Directory.EnumerateDirectories(tempDir).ToList();
if (subdirs.Count > 1)
{
throw new InvalidOperationException($"Unexpected contents layout of the Ant archive - expected a single subdirectory, instead found {subdirs.Count}");
}
Utilities.MoveDirectoryContentsRecursively(subdirs [0], Configurables.Paths.AntInstallDir);
} finally {
Utilities.DeleteDirectorySilent(tempDir);
}
return(true);
}
protected override async Task <bool> Execute(Context context)
{
string sdkRoot = context.Properties.GetRequiredValue(KnownProperties.AndroidSdkDirectory);
string ndkRoot = context.Properties.GetRequiredValue(KnownProperties.AndroidNdkDirectory);
string packageCacheDir = context.Properties.GetRequiredValue(KnownProperties.AndroidToolchainCacheDirectory);
RefreshSdk = context.ComponentsToRefresh.HasFlag(RefreshableComponent.AndroidSDK);
RefreshNdk = context.ComponentsToRefresh.HasFlag(RefreshableComponent.AndroidNDK);
Log.StatusLine("Android SDK location: ", sdkRoot, tailColor: Log.DestinationColor);
Log.StatusLine("Android NDK location: ", ndkRoot, tailColor: Log.DestinationColor);
Log.DebugLine($"Toolchain cache directory: {packageCacheDir}");
var toolchain = new AndroidToolchain();
var toInstall = new List <AndroidPackage> ();
toolchain.Components.ForEach(c => Check(context, packageCacheDir, sdkRoot, c, toInstall, 4));
if (toInstall.Count == 0)
{
return(GatherNDKInfo(context, ndkRoot));
}
Log.MessageLine();
toInstall.ForEach(p => Log.DebugLine($"Missing Android component: {p.Component.Name}"));
string tempDir = Path.Combine(context.Properties.GetRequiredValue(KnownProperties.AndroidToolchainDirectory), "temp");
Log.DebugLine($"Toolchain temporary directory: {tempDir}");
if (Directory.Exists(tempDir))
{
Log.DebugLine("Temporary directory exists, cleaning it up");
Utilities.DeleteDirectorySilent(tempDir);
}
Directory.CreateDirectory(tempDir);
Log.MessageLine("Installing missing components");
var toDownload = new List <AndroidPackage> ();
toInstall.ForEach(c => CheckPackageStatus(context, packageCacheDir, c, toDownload));
if (toDownload.Count > 0)
{
ulong totalDownloadSize = 0;
foreach (AndroidPackage pkg in toDownload)
{
Log.DebugLine($"Android component '{pkg.Component.Name}' will be downloaded from {pkg.Url}");
(bool success, ulong size) = await Utilities.GetDownloadSize(pkg.Url);
if (!success)
{
continue;
}
totalDownloadSize += size;
}
toDownload.ForEach(p => Log.StatusLine($" {context.Characters.Link} {p.Url}", ConsoleColor.White));
DownloadStatus downloadStatus = Utilities.SetupDownloadStatus(context, totalDownloadSize, context.InteractiveSession);
await Task.WhenAll(toDownload.Select(p => Download(context, p.Url, p.LocalPackagePath, p.Component.Name, p.PackageName, downloadStatus)));
}
foreach (AndroidPackage p in toInstall)
{
await Unpack(context, tempDir, p);
}
if (!AcceptLicenses(context, sdkRoot))
{
Log.ErrorLine("Failed to accept Android SDK licenses");
return(false);
}
return(GatherNDKInfo(context, ndkRoot));
}
protected override async Task <bool> Execute(Context context)
{
if (context.ForceRuntimesBuild)
{
if (osSupportsMonoBuild)
{
Log.InfoLine("Rebuilding Mono runtimes as requested");
return(false);
}
Log.InfoLine($"Forced Mono runtimes rebuild requested but rebuilding on {context.OS.Type} is currently not supported.");
}
string localPackagePath = Path.Combine(Configurables.Paths.BundleArchivePath);
if (await Utilities.VerifyArchive(localPackagePath))
{
Log.StatusLine("Xamarin.Android Bundle archive already downloaded and valid");
}
else
{
if (!String.IsNullOrEmpty(context.XABundlePath))
{
// User indicated they wanted to use a specific bundle that's supposed to be on disk. It's not (or
// it's invalid) and that means we have no way of getting it - we can't download the default one
// since that was not the intention behind overriding the location. Thus, we error out.
throw new InvalidOperationException($"Xamarin.Android bundle indicated on the command line does not exist ({context.XABundlePath})");
}
var bundleUrl = new Uri(BundleUriPrefix, BundleFileName);
Log.StatusLine("Bundle URL: ", $"{bundleUrl}", tailColor: ConsoleColor.Cyan);
HttpStatusCode status;
bool success;
ulong size;
(success, size, status) = await Utilities.GetDownloadSizeWithStatus(bundleUrl);
if (!success)
{
if (status == HttpStatusCode.NotFound)
{
if (osSupportsMonoBuild)
{
Log.StatusLine(" not found, will need to rebuild");
}
else
{
Log.ErrorLine($" not found, rebuilding on {context.OS.Type} is not currently supported");
}
return(false);
}
if (String.IsNullOrEmpty(bundle404Message))
{
throw new InvalidOperationException($"Failed to access bundle at {bundleUrl} (HTTP status: {status})");
}
else
{
throw new InvalidOperationException(bundle404Message);
}
}
DownloadStatus downloadStatus = Utilities.SetupDownloadStatus(context, size, context.InteractiveSession);
Log.StatusLine($" {context.Characters.Link} {bundleUrl}", ConsoleColor.White);
await Download(context, bundleUrl, localPackagePath, "Xamarin.Android Bundle", Path.GetFileName(localPackagePath), downloadStatus);
if (!File.Exists(localPackagePath))
{
Log.ErrorLine($"Download of Xamarin.Android Bundle from {bundleUrl} failed.");
return(false);
}
}
Log.StatusLine($"Unpacking bundle to {Utilities.GetRelativePath (BuildPaths.XamarinAndroidSourceRoot, Configurables.Paths.BundleInstallDir)}");
string tempDir = $"{Configurables.Paths.BundleInstallDir}-bundle.temp";
try {
if (!await Utilities.Unpack(localPackagePath, tempDir, cleanDestinatioBeforeUnpacking: true))
{
Log.WarningLine("Failed to unpack bundle, will need to rebuild");
return(false);
}
Log.DebugLine("Moving unpacked bundle from {tempDir} to {Configurables.Paths.Bundle_InstallDir}");
Utilities.MoveDirectoryContentsRecursively(tempDir, Configurables.Paths.BundleInstallDir, resetFileTimestamp: true);
} finally {
Utilities.DeleteDirectorySilent(tempDir);
}
return(true);
}
async Task <bool> InstallDotNetAsync(Context context, string dotnetPath, string version, bool runtimeOnly = false)
{
if (Directory.Exists(Path.Combine(dotnetPath, "sdk", version)) && !runtimeOnly)
{
Log.Status($"dotnet SDK version ");
Log.Status(version, ConsoleColor.Yellow);
Log.StatusLine(" already installed in: ", Path.Combine(dotnetPath, "sdk", version), tailColor: ConsoleColor.Cyan);
return(true);
}
if (Directory.Exists(Path.Combine(dotnetPath, "shared", "Microsoft.NETCore.App", version)) && runtimeOnly)
{
Log.Status($"dotnet runtime version ");
Log.Status(version, ConsoleColor.Yellow);
Log.StatusLine(" already installed in: ", Path.Combine(dotnetPath, "shared", "Microsoft.NETCore.App", version), tailColor: ConsoleColor.Cyan);
return(true);
}
Uri dotnetScriptUrl = Configurables.Urls.DotNetInstallScript;
string dotnetScriptPath = Path.Combine(dotnetPath, Path.GetFileName(dotnetScriptUrl.LocalPath));
if (File.Exists(dotnetScriptPath))
{
Utilities.DeleteFile(dotnetScriptPath);
}
Log.StatusLine("Downloading dotnet-install...");
(bool success, ulong size, HttpStatusCode status) = await Utilities.GetDownloadSizeWithStatus(dotnetScriptUrl);
if (!success)
{
if (status == HttpStatusCode.NotFound)
{
Log.ErrorLine("dotnet-install URL not found");
}
else
{
Log.ErrorLine("Failed to obtain dotnet-install size. HTTP status code: {status} ({(int)status})");
}
return(false);
}
DownloadStatus downloadStatus = Utilities.SetupDownloadStatus(context, size, context.InteractiveSession);
Log.StatusLine($" {context.Characters.Link} {dotnetScriptUrl}", ConsoleColor.White);
await Download(context, dotnetScriptUrl, dotnetScriptPath, "dotnet-install", Path.GetFileName(dotnetScriptUrl.LocalPath), downloadStatus);
if (!File.Exists(dotnetScriptPath))
{
Log.ErrorLine($"Download of dotnet-install from {dotnetScriptUrl} failed");
return(false);
}
Log.StatusLine($"Installing dotnet SDK/runtime '{version}'...");
if (Context.IsWindows)
{
var args = new List <string> {
"-NoProfile", "-ExecutionPolicy", "unrestricted", "-file", dotnetScriptPath,
"-Version", version, "-InstallDir", dotnetPath, "-Verbose"
};
if (runtimeOnly)
{
args.AddRange(new string [] { "-Runtime", "dotnet" });
}
return(Utilities.RunCommand("powershell.exe", args.ToArray()));
}
else
{
var args = new List <string> {
dotnetScriptPath, "--version", version, "--install-dir", dotnetPath, "--verbose"
};
if (runtimeOnly)
{
args.AddRange(new string [] { "-Runtime", "dotnet" });
}
return(Utilities.RunCommand("bash", args.ToArray()));
}
}
async Task <bool> DownloadAndUpackIfNeeded(Context context, string name, string customUrl, string localPath, string archiveFileName, string destinationDirectory)
{
if (File.Exists(localPath))
{
Log.StatusLine($"{name} archive already downloaded");
}
else
{
Utilities.DeleteFileSilent(localPath);
var url = string.IsNullOrEmpty(customUrl) ?
new Uri(Configurables.Urls.MonoArchive_BaseUri, archiveFileName) :
new Uri(customUrl);
Log.StatusLine($"Downloading {name} archive from {url}");
(bool success, ulong size, HttpStatusCode status) = await Utilities.GetDownloadSizeWithStatus(url);
if (!success)
{
if (status == HttpStatusCode.NotFound)
{
Log.Info($"{name} archive URL not found");
}
else
{
Log.Info($"Failed to obtain {name} archive size. HTTP status code: {status} ({(int)status})");
}
Log.InfoLine(". Mono runtimes will be rebuilt");
return(false);
}
DownloadStatus downloadStatus = Utilities.SetupDownloadStatus(context, size, context.InteractiveSession);
Log.StatusLine($" {context.Characters.Link} {url}", ConsoleColor.White);
await Download(context, url, localPath, $"{name} Archive", archiveFileName, downloadStatus);
if (!File.Exists(localPath))
{
Log.InfoLine($"Download of {name} archive from {url} failed");
return(false);
}
}
string tempDir = $"{destinationDirectory}.tmp";
if (!await Utilities.Unpack(localPath, tempDir, cleanDestinatioBeforeUnpacking: true))
{
Utilities.DeleteFileSilent(localPath);
Utilities.DeleteDirectorySilent(destinationDirectory);
Log.WarningLine($"Failed to unpack {name} archive {localPath}");
Utilities.DeleteFileSilent(localPath);
return(false);
}
Log.DebugLine($"Moving unpacked Mono archive from {tempDir} to {destinationDirectory}");
try {
Utilities.MoveDirectoryContentsRecursively(tempDir, destinationDirectory, resetFileTimestamp: true);
} finally {
Utilities.DeleteDirectorySilent(tempDir);
// Clean up zip after extraction if running on a hosted azure pipelines agent.
if (context.IsRunningOnHostedAzureAgent)
{
Utilities.DeleteFileSilent(localPath);
}
}
return(true);
}
protected async Task Download (Context context, Uri url, string destinationFilePath, string descriptiveName, string fileName, DownloadStatus downloadStatus)
{
bool fancyLogging = context.InteractiveSession;
Log.DebugLine ($"{descriptiveName} URL: {url}");
if (!context.InteractiveSession)
LogStatus ($"downloading {fileName} ", 4, ConsoleColor.Gray);
bool success;
Exception downloadEx = null;
try {
Log.DebugLine ("About to start downloading");
success = await Utilities.Download (url, destinationFilePath, downloadStatus);
} catch (Exception ex) {
Log.DebugLine ($"Caught exception: {ex}");
downloadEx = ex;
success = false;
}
Log.Debug ($"success == {success}");
if (success)
return;
string message = $"Failed to download {url}";
if (downloadEx != null)
throw new InvalidOperationException ($"{message}: {downloadEx.Message}", downloadEx);
throw new InvalidOperationException (message);
}