c++ - boost::asio::async_read get end of file error -

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i've written program uses boost:asio library, transfers data between 2 tcp servers. 1 server uses following code send data:

std::shared_ptr<std::string> s =   std::make_shared<std::string>(message); boost::asio::async_write(socket_, boost::asio::buffer(*s),   std::bind(&tcpserver::handlewrite, shared_from_this(), s, _1, _2));

in tcpserver, when use async_read_until data, works fine, if replace async_read_until async_read, gives end of file error:

boost::asio::streambuf input_buffer; boost::asio::async_read_until(socket_, input_buffer, match_condition(),   std::bind(&tcpserver::handleread, shared_from_this(), _1)); //boost::asio::async_read(socket_, input_buffer, boost::asio::transfer_all(), //  std::bind(&tcpserver::handleread, shared_from_this(), _1));

if use boost::asio::transfer_at_least(1) in async_read, can expected result.

why did happen?

an eof error indicates writer side closed connection. data sent before should still available in tcpserver::handleread callback. check bytes_transferred parameter find out how data received reader.


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