sending an ostringstream supported?

[Sec42]

Hi,

sorry if this issue is just a lack of my C++ understanding. But I could not find a way to send an ostringstream with the C++ interface.

std::ostringstream line;
line << "Hello World" << std::endl;

I tried different variants of passing the string that would not compile:

nng_sock.send(line.str());

I tried making a buffer view for it:

const std::string tmp = line.str();
const char* cstr = tmp.c_str();
nng_sock.send(nng::buffer(cstr,strlen(cstr)));

but that seems to try & free the pointer passed.

What I could get to work was calling the underlying nng_send

const std::string tmp = line.str();
const char* cstr = tmp.c_str();
int r = nng_send(nng_sock.get(),(void*)cstr,strlen(cstr),0);
if( r != 0 ) {
    throw nng::exception(r,"nng_send");
}

Is there a better way to do it?

Preferably without copying the data in memory.

[cwzx]

nng::buffer is not a view. Try this:

std::string tmp = line.str();
sock.send(nng::view(tmp.data(), tmp.size()));

[Sec42]

That seems to work fine. Thanks very much!