Sascha Seewald wrote:

Hi Boosters,

I´m playing around with the great boost::asio library but have problems using the boost::asio::ip::tcp::iostream.

I try to implement a very simple nntp-client:

<code>

void connect_and_retrieve_list_of_newsgroups() {

std::string line;

// connect to server boost::asio::ip::tcp::iostream s("news.gmane.org", "nntp"); if (!s) return;

// read connection ack std::getline(s, line);

// log std::cout << line;

// check return code here. we assume everything is fine. // ...

// send LIST command to request a list of newsgroups (see rfc 977) // the server will respond with one or more lines s << "LIST\r\n";

Try adding s.flush() here.

// read response std::getline(s, line); // <-- waits here 'til server timeout

... }

</code>

For some reason I don't get a response to the LIST command. After a few minutes of waiting the server send a timeout notification. It is like I had never sent the request. The same code using sockets and asio::write() works ok.

So my questions are: - In what way differ tcp::iostreams sending from asio::write() sending? - Do tcp::iostreams append (or convert or drop) any characters of the given string before sending? - Is there a way to gain direct access to tcp::iostreams underlying socket (at least for testing)? - What am I doing wrong?

Any help would be much appreciated!

Cheers Sascha