/// <summary>
/// Set the current AppHost as a single-file bundle.
/// </summary>
/// <param name="appHostPath">The path of Apphost template, which has the place holder</param>
/// <param name="bundleHeaderOffset">The offset to the location of bundle header</param>
public static void SetAsBundle(
string appHostPath,
long bundleHeaderOffset)
{
byte[] bundleHeaderPlaceholder =
{
// 8 bytes represent the bundle header-offset
// Zero for non-bundle apphosts (default).
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
// 32 bytes represent the bundle signature: SHA-256 for ".net core bundle"
0x8b, 0x12, 0x02, 0xb9, 0x6a, 0x61, 0x20, 0x38,
0x72, 0x7b, 0x93, 0x02, 0x14, 0xd7, 0xa0, 0x32,
0x13, 0xf5, 0xb9, 0xe6, 0xef, 0xae, 0x33, 0x18,
0xee, 0x3b, 0x2d, 0xce, 0x24, 0xb3, 0x6a, 0xae
};
// Re-write the destination apphost with the proper contents.
RetryUtil.RetryOnIOError(() =>
BinaryUtils.SearchAndReplace(appHostPath,
bundleHeaderPlaceholder,
BitConverter.GetBytes(bundleHeaderOffset),
pad0s: false));
RetryUtil.RetryOnIOError(() =>
MachOUtils.AdjustHeadersForBundle(appHostPath));
// Memory-mapped write does not updating last write time
RetryUtil.RetryOnIOError(() =>
File.SetLastWriteTimeUtc(appHostPath, DateTime.UtcNow));
}
/// <summary>
/// Create an AppHost with embedded configuration of app binary location
/// </summary>
/// <param name="appHostSourceFilePath">The path of Apphost template, which has the place holder</param>
/// <param name="appHostDestinationFilePath">The destination path for desired location to place, including the file name</param>
/// <param name="appBinaryFilePath">Full path to app binary or relative path to the result apphost file</param>
/// <param name="windowsGraphicalUserInterface">Specify whether to set the subsystem to GUI. Only valid for PE apphosts.</param>
/// <param name="assemblyToCopyResorcesFrom">Path to the intermediate assembly, used for copying resources to PE apphosts.</param>
public static void CreateAppHost(
string appHostSourceFilePath,
string appHostDestinationFilePath,
string appBinaryFilePath,
bool windowsGraphicalUserInterface = false,
string assemblyToCopyResorcesFrom = null)
{
var bytesToWrite = Encoding.UTF8.GetBytes(appBinaryFilePath);
if (bytesToWrite.Length > 1024)
{
throw new AppNameTooLongException(appBinaryFilePath);
}
BinaryUtils.CopyFile(appHostSourceFilePath, appHostDestinationFilePath);
bool appHostIsPEImage = false;
void RewriteAppHost()
{
// Re-write the destination apphost with the proper contents.
using (var memoryMappedFile = MemoryMappedFile.CreateFromFile(appHostDestinationFilePath))
{
using (MemoryMappedViewAccessor accessor = memoryMappedFile.CreateViewAccessor())
{
BinaryUtils.SearchAndReplace(accessor, AppBinaryPathPlaceholderSearchValue, bytesToWrite);
appHostIsPEImage = BinaryUtils.IsPEImage(accessor);
if (windowsGraphicalUserInterface)
{
if (!appHostIsPEImage)
{
throw new AppHostNotPEFileException();
}
BinaryUtils.SetWindowsGraphicalUserInterfaceBit(accessor);
}
}
}
}
void UpdateResources()
{
if (assemblyToCopyResorcesFrom != null && appHostIsPEImage)
{
if (ResourceUpdater.IsSupportedOS())
{
// Copy resources from managed dll to the apphost
new ResourceUpdater(appHostDestinationFilePath)
.AddResourcesFromPEImage(assemblyToCopyResorcesFrom)
.Update();
}
else
{
throw new AppHostCustomizationUnsupportedOSException();
}
}
}
void RemoveSignatureIfMachO()
{
MachOUtils.RemoveSignature(appHostDestinationFilePath);
}
void SetLastWriteTime()
{
// Memory-mapped write does not updating last write time
File.SetLastWriteTimeUtc(appHostDestinationFilePath, DateTime.UtcNow);
}
try
{
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
var filePermissionOctal = Convert.ToInt32("755", 8); // -rwxr-xr-x
const int EINTR = 4;
int chmodReturnCode = 0;
do
{
chmodReturnCode = chmod(appHostDestinationFilePath, filePermissionOctal);
}while (chmodReturnCode == -1 && Marshal.GetLastWin32Error() == EINTR);
if (chmodReturnCode == -1)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), $"Could not set file permission {filePermissionOctal} for {appHostDestinationFilePath}.");
}
}
RetryUtil.RetryOnIOError(RewriteAppHost);
RetryUtil.RetryOnWin32Error(UpdateResources);
RetryUtil.RetryOnIOError(RemoveSignatureIfMachO);
RetryUtil.RetryOnIOError(SetLastWriteTime);
}
catch (Exception ex)
{
// Delete the destination file so we don't leave an unmodified apphost
try
{
File.Delete(appHostDestinationFilePath);
}
catch (Exception failedToDeleteEx)
{
throw new AggregateException(ex, failedToDeleteEx);
}
throw;
}
}
/// <summary>
/// Create an AppHost with embedded configuration of app binary location
/// </summary>
/// <param name="appHostSourceFilePath">The path of Apphost template, which has the place holder</param>
/// <param name="appHostDestinationFilePath">The destination path for desired location to place, including the file name</param>
/// <param name="appBinaryFilePath">Full path to app binary or relative path to the result apphost file</param>
/// <param name="windowsGraphicalUserInterface">Specify whether to set the subsystem to GUI. Only valid for PE apphosts.</param>
/// <param name="assemblyToCopyResorcesFrom">Path to the intermediate assembly, used for copying resources to PE apphosts.</param>
public static void CreateAppHost(
string appHostSourceFilePath,
string appHostDestinationFilePath,
string appBinaryFilePath,
bool windowsGraphicalUserInterface = false,
string assemblyToCopyResorcesFrom = null)
{
var bytesToWrite = Encoding.UTF8.GetBytes(appBinaryFilePath);
if (bytesToWrite.Length > 1024)
{
throw new AppNameTooLongException(appBinaryFilePath);
}
bool appHostIsPEImage = false;
void RewriteAppHost(MemoryMappedViewAccessor accessor)
{
// Re-write the destination apphost with the proper contents.
BinaryUtils.SearchAndReplace(accessor, AppBinaryPathPlaceholderSearchValue, bytesToWrite);
appHostIsPEImage = PEUtils.IsPEImage(accessor);
if (windowsGraphicalUserInterface)
{
if (!appHostIsPEImage)
{
throw new AppHostNotPEFileException();
}
PEUtils.SetWindowsGraphicalUserInterfaceBit(accessor);
}
}
void UpdateResources()
{
if (assemblyToCopyResorcesFrom != null && appHostIsPEImage)
{
if (ResourceUpdater.IsSupportedOS())
{
// Copy resources from managed dll to the apphost
new ResourceUpdater(appHostDestinationFilePath)
.AddResourcesFromPEImage(assemblyToCopyResorcesFrom)
.Update();
}
else
{
throw new AppHostCustomizationUnsupportedOSException();
}
}
}
try
{
RetryUtil.RetryOnIOError(() =>
{
FileStream appHostSourceStream = null;
MemoryMappedFile memoryMappedFile = null;
MemoryMappedViewAccessor memoryMappedViewAccessor = null;
try
{
// Open the source host file.
appHostSourceStream = new FileStream(appHostSourceFilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
memoryMappedFile = MemoryMappedFile.CreateFromFile(appHostSourceStream, null, 0, MemoryMappedFileAccess.Read, HandleInheritability.None, true);
memoryMappedViewAccessor = memoryMappedFile.CreateViewAccessor(0, 0, MemoryMappedFileAccess.CopyOnWrite);
// Get the size of the source app host to ensure that we don't write extra data to the destination.
// On Windows, the size of the view accessor is rounded up to the next page boundary.
long sourceAppHostLength = appHostSourceStream.Length;
// Transform the host file in-memory.
RewriteAppHost(memoryMappedViewAccessor);
// Save the transformed host.
using (FileStream fileStream = new FileStream(appHostDestinationFilePath, FileMode.Create))
{
BinaryUtils.WriteToStream(memoryMappedViewAccessor, fileStream, sourceAppHostLength);
// Remove the signature from MachO hosts.
if (!appHostIsPEImage)
{
MachOUtils.RemoveSignature(fileStream);
}
}
}
finally
{
memoryMappedViewAccessor?.Dispose();
memoryMappedFile?.Dispose();
appHostSourceStream?.Dispose();
}
});
RetryUtil.RetryOnWin32Error(UpdateResources);
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
var filePermissionOctal = Convert.ToInt32("755", 8); // -rwxr-xr-x
const int EINTR = 4;
int chmodReturnCode = 0;
do
{
chmodReturnCode = chmod(appHostDestinationFilePath, filePermissionOctal);
}while (chmodReturnCode == -1 && Marshal.GetLastWin32Error() == EINTR);
if (chmodReturnCode == -1)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), $"Could not set file permission {filePermissionOctal} for {appHostDestinationFilePath}.");
}
}
}
catch (Exception ex)
{
// Delete the destination file so we don't leave an unmodified apphost
try
{
File.Delete(appHostDestinationFilePath);
}
catch (Exception failedToDeleteEx)
{
throw new AggregateException(ex, failedToDeleteEx);
}
throw;
}
}
