//------------------------------------------------------------------------------ /* This file is part of rippled: https://github.com/ripple/rippled Copyright (c) 2012, 2013 Ripple Labs Inc. Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ //============================================================================== #include namespace ripple { namespace HTTP { Peer::Peer (ServerImpl& impl, Port const& port) : impl_ (impl) , strand_ (impl_.get_io_service()) , data_timer_ (impl_.get_io_service()) , request_timer_ (impl_.get_io_service()) , buffer_ (bufferSize) , writesPending_ (0) , closed_ (false) , callClose_ (false) , errorCode_ (0) , detached_ (0) { tag = nullptr; int flags = MultiSocket::Flag::server_role; switch (port.security) { default: bassertfalse; case Port::no_ssl: break; case Port::allow_ssl: flags |= MultiSocket::Flag::ssl; break; case Port::require_ssl: flags |= MultiSocket::Flag::ssl_required; break; } socket_.reset (MultiSocket::New ( impl_.get_io_service(), port.context->get(), flags)); impl_.add (*this); } Peer::~Peer () { if (callClose_) impl_.handler().onClose (session(), errorCode_); impl_.remove (*this); } //-------------------------------------------------------------------------- // Returns the Content-Body as a single buffer. // VFALCO NOTE This is inefficient... std::string Peer::content() { std::string s; beast::DynamicBuffer const& body ( parser_.request()->body ()); s.resize (body.size ()); boost::asio::buffer_copy ( boost::asio::buffer (&s[0], s.size()), body.data ()); return s; } // Send a copy of the data. void Peer::write (void const* buffer, std::size_t bytes) { // Make sure this happens on an io_service thread. impl_.get_io_service().dispatch (strand_.wrap ( std::bind (&Peer::async_write, shared_from_this(), SharedBuffer (static_cast (buffer), bytes)))); } // Make the Session asynchronous void Peer::detach () { if (detached_.exchange (1) == 0) { bassert (! work_); bassert (detach_ref_ == nullptr); // Maintain an additional reference while detached detach_ref_ = shared_from_this(); // Prevent the io_service from running out of work. // The work object will be destroyed with the Peer // after the Session is closed and handlers complete. // work_ = boost::in_place (std::ref ( impl_.get_io_service())); } } // Called by the Handler to close the session. void Peer::close () { // Make sure this happens on an io_service thread. impl_.get_io_service().dispatch (strand_.wrap ( std::bind (&Peer::handle_close, shared_from_this()))); } //-------------------------------------------------------------------------- // Called when the handshake completes // void Peer::handle_handshake (error_code ec) { if (ec == boost::asio::error::operation_aborted) return; if (ec != 0) { failed (ec); return; } async_read_some(); } // Called when the data timer expires // void Peer::handle_data_timer (error_code ec) { if (ec == boost::asio::error::operation_aborted) return; if (closed_) return; if (ec != 0) { failed (ec); return; } failed (boost::system::errc::make_error_code ( boost::system::errc::timed_out)); } // Called when the request timer expires // void Peer::handle_request_timer (error_code ec) { if (ec == boost::asio::error::operation_aborted) return; if (closed_) return; if (ec != 0) { failed (ec); return; } failed (boost::system::errc::make_error_code ( boost::system::errc::timed_out)); } // Called when async_write completes. void Peer::handle_write (error_code ec, std::size_t bytes_transferred, SharedBuffer const& buf) { if (ec == boost::asio::error::operation_aborted) return; if (ec != 0) { failed (ec); return; } bassert (writesPending_ > 0); if (--writesPending_ == 0 && closed_) socket_->shutdown (socket::shutdown_send, ec); } // Called when async_read_some completes. void Peer::handle_read (error_code ec, std::size_t bytes_transferred) { if (ec == boost::asio::error::operation_aborted) return; if (ec != 0 && ec != boost::asio::error::eof) { failed (ec); return; } std::size_t const bytes_parsed (parser_.process ( buffer_.getData(), bytes_transferred)); if (parser_.error() || bytes_parsed != bytes_transferred) { failed (boost::system::errc::make_error_code ( boost::system::errc::bad_message)); return; } if (ec == boost::asio::error::eof) { parser_.process_eof(); ec = error_code(); } if (parser_.error()) { failed (boost::system::errc::make_error_code ( boost::system::errc::bad_message)); return; } if (! parser_.finished()) { // Feed some headers to the callback if (parser_.fields().size() > 0) { handle_headers(); if (closed_) return; } } if (parser_.finished ()) { data_timer_.cancel(); // VFALCO NOTE: Should we cancel this one? request_timer_.cancel(); if (! socket_->needs_handshake()) socket_->shutdown (socket::shutdown_receive, ec); handle_request (); return; } async_read_some(); } // Called when we have some new headers. void Peer::handle_headers () { impl_.handler().onHeaders (session()); } // Called when we have a complete http request. void Peer::handle_request () { // This is to guarantee onHeaders is called at least once. handle_headers(); if (closed_) return; // Process the HTTPRequest impl_.handler().onRequest (session()); } // Called to close the session. void Peer::handle_close () { closed_ = true; // Release our additional reference detach_ref_.reset(); } //-------------------------------------------------------------------------- // // Peer // // Called when the acceptor accepts our socket. void Peer::accept () { callClose_ = true; impl_.handler().onAccept (session()); if (closed_) { cancel(); return; } request_timer_.expires_from_now ( boost::posix_time::seconds ( requestTimeoutSeconds)); request_timer_.async_wait (strand_.wrap (std::bind ( &Peer::handle_request_timer, shared_from_this(), beast::asio::placeholders::error))); if (socket_->needs_handshake ()) { socket_->async_handshake (beast::asio::abstract_socket::server, strand_.wrap (std::bind (&Peer::handle_handshake, shared_from_this(), beast::asio::placeholders::error))); } else { async_read_some(); } } // Cancel all pending i/o and timers and send tcp shutdown. void Peer::cancel () { error_code ec; data_timer_.cancel (ec); request_timer_.cancel (ec); socket_->cancel (ec); socket_->shutdown (socket::shutdown_both, ec); } // Called by a completion handler when error is not eof or aborted. void Peer::failed (error_code const& ec) { errorCode_ = ec.value(); bassert (errorCode_ != 0); cancel (); } // Call the async_read_some initiating function. void Peer::async_read_some () { // re-arm the data timer // (this cancels the previous wait, if any) // data_timer_.expires_from_now ( boost::posix_time::seconds ( dataTimeoutSeconds)); data_timer_.async_wait (strand_.wrap (std::bind ( &Peer::handle_data_timer, shared_from_this(), beast::asio::placeholders::error))); // issue the read // boost::asio::mutable_buffers_1 buf ( buffer_.getData (), buffer_.getSize ()); socket_->async_read_some (buf, strand_.wrap ( std::bind (&Peer::handle_read, shared_from_this(), beast::asio::placeholders::error, beast::asio::placeholders::bytes_transferred))); } // Send a shared buffer void Peer::async_write (SharedBuffer const& buf) { bassert (buf.get().size() > 0); ++writesPending_; // Send the copy. We pass the SharedBuffer in the last parameter // so that a reference is maintained as the handler gets copied. // When the final completion function returns, the reference // count will drop to zero and the buffer will be freed. // boost::asio::async_write (*socket_, boost::asio::const_buffers_1 (&(*buf)[0], buf->size()), strand_.wrap (std::bind (&Peer::handle_write, shared_from_this(), beast::asio::placeholders::error, beast::asio::placeholders::bytes_transferred, buf))); } } }