LibWeb: Handle TextDecoder's fatal flag

cubiclove · May 27, 2024 · 3029406 · 3029406
1 parent f8ac883
commit 3029406
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/Userland/Libraries/LibWeb/Encoding/TextDecoder.cpp b/Userland/Libraries/LibWeb/Encoding/TextDecoder.cpp
@@ -56,7 +56,10 @@ WebIDL::ExceptionOr<String> TextDecoder::decode(Optional<JS::Handle<WebIDL::Buff
  if (data_buffer_or_error.is_error())
  return WebIDL::OperationError::create(realm(), "Failed to copy bytes from ArrayBuffer"_fly_string);
  auto& data_buffer = data_buffer_or_error.value();
- return TRY_OR_THROW_OOM(vm(), m_decoder.to_utf8({ data_buffer.data(), data_buffer.size() }));
+ auto result = TRY_OR_THROW_OOM(vm(), m_decoder.to_utf8({ data_buffer.data(), data_buffer.size() }));
+ if (this->fatal() && result.contains(0xfffd))
+ return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, "Decoding failed"sv };
+ return result;
 }
 
 }