id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12875	ip::tcp::iostream flush() doesn't clear the buffer.  Neither does clear();	ericrsoldan@…	chris_kohlhoff	"Code something like the below shows the issue:

std::string postData = ""This is my post data."";

ip::tcp::iostream stream;

stream.expires_from_now(boost::posix_time::seconds(10));

stream.connect(""192.168.1.128"", ""http"");

stream << ""POST /myRestfulPath HTTP/1.1\r\n"";

stream << ""Content-Type: application/x-www-form-urlencoded\r\n"";

stream << ""Host: 192.168.1.128:8080\r\n"";

stream << ""Content-Length: "" << postData.size() << ""\r\n"";

stream << ""Connection: Close\r\n\r\n"";

stream.flush();

stream << postData.c_str();

stream.flush();


Using Wireshark, the headers show up with the first flush, 
but also show up from the second, with the postData appended.

I understand that I do not need the first flush in this example.
However, the server requires an ""Expect: 100-Continue"" so
therefore I need to send before the postData, and then receive
the ""Continue"", and then send the postData.  (Not shown.)

stream.clear() doesn't clear what flush left behind, either.


"	Bugs	new	To Be Determined	asio	Boost 1.63.0	Problem		tcp iostream flush clear