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,