I'm trying to debug my problem. My sending side I can see the number of
bytes which results in 55 from:
bytes.size()
And the receiving side I can see it received the same number of bytes, 55.
len
Is there a shortcut way to print the contents of what was received. Some
way to print the sending side serialized data of words.asBytes() and the
receiving serialized data, words?
I feel like the error of not containing a root pointer means it's not
finding/reading the serialized data somehow correctly.
On Thursday, March 10, 2022 at 7:14:42 PM UTC-6 William Zumwalt wrote:
> Hello,
> I am getting the following error.
>
> Exception in setting up a receiver: capnp/message.c++:99: failed: expected
> setment != nullptr && segment->checkObject(segment->getStartPtr(), ONE *
> WORDS); Message did not contain a root pointer.
>
> Here is how I send a byte array.
>
> auto msg_builder = builder.initRoot<SomeMsg>();
> msg_builder.setVal(val);
>
> auto words = messageToFlatArray(msg_builder);
> auto bytes = words.asBytes();
>
> peer.send(bytes);
>
> And then receive it on the other end.
> string msg;
> peer.get(msg);
>
> MallocMessageBuilder builder;
> const void* arr = msg.c_str();
> int len = msg.size();
>
> auto words = kj::heapArray<capnp::word>(len / sizeof(capnp::word));
> memcpy(words.begin(), arr, len);
>
> FlatArrayMessageReader reader(words);
>
> // error happens on this call
> auto m = reader.getRoot<SomeMsg>();
>
> Any thoughts/hints at what's wrong? Thanks
>
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