char?d1[128];
size_t?bytes_transferred = sock.receive(asio::buffer(d1));

string?str =?" hello world "?;
size_t?bytes_transferred = sock.send(asio::buffer(str));

asio::buffer(std::vector<char>(128));
asio::buffer(std::array<char,128>());

char* p1 = asio::buffer_cast<char*>(buffer);

size_t?s1 = asio::buffer_size(buf);

std::array<char, 128> buf;
sock.read_some(asio::buffer(buf));

size_t?bytes_transfered = asio::read(sock, asio::buffer(buf),?asio::transfer_all(), err);

    //通過streambuf發(fā)送數(shù)據(jù)
    asio::streambuf b;
    std::ostream os(&b);
    os << "Hello, World!\n";

    size_t n = sock.send(b.data());    // try sending some data in input sequence
    b.consume(n); // sent data is removed from input sequence

 

    //通過streambuf讀數(shù)據(jù)
    asio::streambuf b;
    asio::streambuf::mutable_buffers_type bufs = b.prepare(512);    // reserve 512 bytes in output sequence
    size_t n = sock.receive(bufs);
    b.commit(n);    // received data is "committed" from output sequence to input sequence

    std::istream is(&b);
    std::string s;
    is >> s;

size_t?n = asio::read_until(sock, stream,?'\n');
asio::streambuf::const_buffers_type?bufs = sb.data();
std::string?line(asio::buffers_begin(bufs), asio::buffers_begin(bufs) + n);