Method attach

Libraries/Http/HttpWebSocket.cpp:1279–1315

    Span<const char> encodedHeader;
    SC_TRY(writer.beginFrame(header, storage, encodedHeader));
    SC_TRY_MSG(storage.sizeInBytes() >= encodedHeader.sizeInBytes() + payload.sizeInBytes(),
               "HttpWebSocketEndpoint frame storage too small");

    if (payload.sizeInBytes() > 0)
    {
        Span<char> destinationPayload = {storage.data() + encodedHeader.sizeInBytes(), payload.sizeInBytes()};
        ::memcpy(destinationPayload.data(), payload.data(), payload.sizeInBytes());
        SC_TRY(writer.writePayload(destinationPayload));
    }
    SC_TRY(writer.finishFrame());

    encodedFrame = {storage.data(), encodedHeader.sizeInBytes() + payload.sizeInBytes()};
    return Result(true);
}

Result HttpWebSocketEndpoint::sendData(HttpWebSocketOpcode opcode, Span<const char> payload, bool fin,
                                       const uint8_t* maskKey, Span<char> storage, Span<const char>& encodedFrame)
{
    SC_TRY_MSG(opcode == HttpWebSocketOpcode::Text or opcode == HttpWebSocketOpcode::Binary or
                   opcode == HttpWebSocketOpcode::Continuation,
               "HttpWebSocketEndpoint sendData requires a data opcode");
    HttpWebSocketFrameHeaderView header;
    header.opcode        = opcode;
    header.fin           = fin;
    header.payloadLength = payload.sizeInBytes();
    SC_TRY(applyOutgoingMask(header, maskKey));
    return sendFrame(header, payload, storage, encodedFrame);
}

Result HttpWebSocketEndpoint::sendPing(Span<const char> payload, const uint8_t* maskKey, Span<char> storage,
                                       Span<const char>& encodedFrame)
{
    SC_TRY_MSG(payload.sizeInBytes() <= sizeof(controlPayload), "HttpWebSocketEndpoint ping payload too large");
    HttpWebSocketFrameHeaderView header;
    header.opcode        = HttpWebSocketOpcode::Ping;
    header.fin           = true;
    header.payloadLength = payload.sizeInBytes();
    SC_TRY(applyOutgoingMask(header, maskKey));
    return sendFrame(header, payload, storage, encodedFrame);
}