internal static ImageflowException FromContext(JobContextHandle c, ulong defaultBufferSize = 2048)
{
var result = ErrorFetchResult.BufferTooSmall;
for (var bufferSize = defaultBufferSize; bufferSize < MaxBufferSize; bufferSize *= 2)
{
result = TryGetErrorString(c, bufferSize, out var message);
switch (result)
{
case ErrorFetchResult.Success:
return(new ImageflowException(message));
case ErrorFetchResult.ContextInvalid:
return(null);
case ErrorFetchResult.NoError:
return(null);
case ErrorFetchResult.BufferTooSmall: break;
default:
throw new ArgumentOutOfRangeException();
}
}
if (result == ErrorFetchResult.BufferTooSmall)
{
throw new ImageflowAssertionFailed(
$"Imageflow error and stacktrace exceeded {MaxBufferSize} bytes");
}
return(null);
}
private static ErrorFetchResult TryGetErrorString(JobContextHandle c, ulong bufferSize, out string message)
{
message = null;
if (c.IsClosed || c.IsInvalid)
{
return(ErrorFetchResult.ContextInvalid);
}
if (!NativeMethods.imageflow_context_has_error(c))
{
return(ErrorFetchResult.NoError);
}
var buffer = new byte[bufferSize];
var pinned = GCHandle.Alloc(buffer, GCHandleType.Pinned);
try
{
var everythingWritten = NativeMethods.imageflow_context_error_write_to_buffer(c,
pinned.AddrOfPinnedObject(), new UIntPtr((ulong)buffer.LongLength), out var bytesWritten);
message = bytesWritten.ToUInt64() > 0
? Encoding.UTF8.GetString(buffer, 0, (int)Math.Min(bytesWritten.ToUInt64(), bufferSize))
: "";
return(everythingWritten ? ErrorFetchResult.Success : ErrorFetchResult.BufferTooSmall);
}
finally
{
pinned.Free();
}
}
internal static ImageflowException FromContext(JobContextHandle c, ulong defaultBufferSize = 2048)
{
if (c.IsClosed || c.IsInvalid || !NativeMethods.imageflow_context_has_error(c))
{
return(null);
}
var buffer = new byte[defaultBufferSize];
var pinned = GCHandle.Alloc(buffer, GCHandleType.Pinned);
bool everythingWritten;
string message = null;
try
{
everythingWritten = NativeMethods.imageflow_context_error_write_to_buffer(c,
pinned.AddrOfPinnedObject(), new UIntPtr((ulong)buffer.LongLength), out var bytesWritten);
if (bytesWritten.ToUInt64() > 0)
{
message = Encoding.UTF8.GetString(buffer, 0, (int)Math.Min(bytesWritten.ToUInt64(), defaultBufferSize)).Replace("\n", "");
message = message + message.Length;
Debug.WriteLine(message);
Console.WriteLine(message);
}
}
finally
{
pinned.Free();
}
if (everythingWritten)
{
return(new ImageflowException(message ?? "Empty error and stacktrace"));
}
if (defaultBufferSize < MaxBufferSize)
{
return(FromContext(c, MaxBufferSize));
}
throw new ImageflowAssertionFailed(
$"Imageflow error and stacktrace exceeded {MaxBufferSize} bytes");
}
public static extern bool imageflow_json_response_read(JobContextHandle context, JsonResponseHandle responseIn,
out int statusCodeOut, out IntPtr bufferUtf8NoNullsOut, out UIntPtr bufferSizeOut);
public static extern bool imageflow_context_print_and_exit_if_error(JobContextHandle context);
public static extern int imageflow_context_error_as_http_code(JobContextHandle context);
public static extern bool imageflow_context_error_try_clear(JobContextHandle context);
public static extern bool imageflow_json_response_read(JobContextHandle context, JsonResponseHandle response_in,
out int status_code_out, out IntPtr buffer_utf8_no_nulls_out, out UIntPtr buffer_size_out);
public static extern bool imageflow_context_error_write_to_buffer(JobContextHandle context, IntPtr buffer,
UIntPtr bufferLength,
out UIntPtr bytesWritten);
public static extern bool imageflow_context_get_output_buffer_by_id(JobContextHandle context,
int ioId, out IntPtr resultBuffer, out UIntPtr resultBufferLength);
public static extern bool imageflow_context_add_output_buffer(JobContextHandle context, int ioId);
public static extern bool imageflow_context_add_input_buffer(JobContextHandle context, int ioId, IntPtr buffer,
UIntPtr bufferByteCount, Lifetime lifetime);
public static extern IntPtr imageflow_context_memory_allocate(JobContextHandle context, IntPtr bytes,
IntPtr filename, int line);
public static extern bool imageflow_json_response_destroy(JobContextHandle context, IntPtr response);
public static extern bool imageflow_context_begin_terminate(JobContextHandle context);
public static extern bool imageflow_context_memory_free(JobContextHandle context, IntPtr pointer,
IntPtr filename, int line);
public static extern bool imageflow_context_has_error(JobContextHandle context);
public static extern IntPtr imageflow_context_send_json(JobContextHandle context, IntPtr method,
IntPtr jsonBuffer, UIntPtr jsonBufferSize);
public static extern bool imageflow_context_error_recoverable(JobContextHandle context);
public JobContext()
{
_handle = new JobContextHandle();
}
public JsonResponseHandle(JobContextHandle parent, IntPtr ptr)
: base(true)
{
ParentContext = parent ?? throw new ArgumentNullException(nameof(parent));
SetHandle(ptr);
}