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http_session.ipp
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http_session.ipp
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//
// http_session.ipp
// ~~~~~~~~~~
//
// http_sessionの実装
//
#ifndef BOOSTCONNECT_SESSION_HTTP_IPP
#define BOOSTCONNECT_SESSION_HTTP_IPP
#include <boost/asio.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/karma.hpp>
#include <boost/fusion/include/std_pair.hpp>
#include "../http_session.hpp"
#include "../../application_layer/tcp_socket.hpp"
#include "../../application_layer/ssl_socket.hpp"
namespace bstcon{
namespace session{
bstcon::application_layer::socket_base::lowest_layer_type& http_session::lowest_layer()
{
return socket_->lowest_layer();
}
http_session::http_session(io_service& io_service): socket_busy_(false),read_timer_(io_service)
{
socket_ = new bstcon::application_layer::tcp_socket(io_service);
}
#ifdef USE_SSL_BOOSTCONNECT
typedef boost::asio::ssl::context context;
http_session::http_session(io_service& io_service,context& ctx): socket_busy_(false),read_timer_(io_service)
{
socket_ = new bstcon::application_layer::ssl_socket(io_service,ctx);
}
#endif
http_session::~http_session()
{
delete socket_;
}
void http_session::start(RequestHandler handler,CloseHandler c_handler)
{
if(socket_busy_) return; //例外予定
socket_busy_ = true;
handler_ = handler;
c_handler_ = c_handler;
#ifdef USE_SSL_BOOSTCONNECT
socket_->async_handshake(boost::asio::ssl::stream_base::server,
boost::bind(&http_session::handle_handshake,shared_from_this(),
boost::asio::placeholders::error));
#else
socket_->async_handshake(
boost::bind(&http_session::handle_handshake,shared_from_this(),
boost::asio::placeholders::error));
#endif
}
void http_session::end(CloseHandler c_handler)
{
socket_->close();
c_handler(static_cast<boost::shared_ptr<session_base>>(shared_from_this()));
return;
}
void http_session::handle_handshake(const error_code& ec)
{
if(!ec)
{
read_buf_.reset(new boost::asio::streambuf());
boost::asio::async_read_until(*socket_,*read_buf_.get(),
"\r\n\r\n",
boost::bind(&http_session::handle_header_read,shared_from_this(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
read_timer_.expires_from_now(boost::posix_time::seconds(5));
read_timer_.async_wait(
boost::bind(&http_session::read_timeout,shared_from_this(),boost::asio::placeholders::error));
}
//else delete this; //例外
}
void http_session::read_timeout(const error_code& ec)
{
this->end(c_handler_);
return;
}
void http_session::handle_header_read(const error_code& ec,std::size_t)
{
if(!ec)
{
std::string request_str(boost::asio::buffer_cast<const char*>(read_buf_->data()));
//リクエストヘッダーのパース
request_str.erase(0,request_header_parser(request_str,request_));
request_.body.append(request_str);
size_t byte = int_parser(find_return_or_default(request_.header,"Content-Length","0"));
if( byte != 0 )
{
//長さがある
read_buf_.reset(new boost::asio::streambuf());
boost::asio::async_read(
*socket_,
*read_buf_.get(),
boost::asio::transfer_at_least(byte - request_.body.length()),
boost::bind(&http_session::handle_body_read,shared_from_this(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
else
{
//長さがない -> 長さが分からないならこの先読み込むのは危ない
handle_request_read_complete();
}
}
else std::cout << ec.message() << std::endl;
//else delete this; //例外
}
void http_session::handle_body_read(const error_code& ec,std::size_t sz)
{
if(!ec)
{
std::string body_str(boost::asio::buffer_cast<const char*>(read_buf_->data()));
request_.body.append(body_str);
handle_request_read_complete();
}
//else delete this; //例外
}
void http_session::handle_request_read_complete()
{
keep_alive_ =
find_return_or_default(request_.header,"Connection","close") == "Keep-Alive" ||
find_return_or_default(request_.header,"Proxy-Connection","close") == "Keep-Alive";
response_type response;
handler_(request_,response);
write_buf_.reset(new boost::asio::streambuf());
//std::ostream os(write_buf_.get()); //TODO:
std::ostreambuf_iterator<char> out(write_buf_.get());
if(response_generater(out,response))
{
boost::asio::async_write(*socket_,*write_buf_.get(),
boost::bind(&http_session::handle_write,shared_from_this(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
//else delete this; //パース失敗
}
void http_session::handle_write(const error_code& ec,std::size_t sz)
{
if(!ec)
{
if(keep_alive_)
{
handle_handshake(error_code());
}
else
{
this->end(c_handler_);
return;
}
}
//else delete this; //例外
}
template<class OutputIterator>
bool http_session::response_generater(OutputIterator& sink,const response_type& response) const
{
namespace karma = boost::spirit::karma;
bool r = karma::generate(sink,
"HTTP/" << karma::string << ' ' << karma::int_ << ' ' << karma::string << "\r\n",
response.http_version,
response.status_code,
response.status_message);
if(!response.header.empty())
{
r = r && karma::generate(sink,
+(karma::string << ": " << karma::string << "\r\n"),
response.header);
}
if(!response.body.empty())
{
r = r && karma::generate(sink,
"\r\n" << karma::string,
response.body);
}
return r;
}
const int http_session::int_parser(const std::string& base) const
{
namespace qi = boost::spirit::qi;
int parsed = 0;
qi::parse(base.cbegin(),base.cend(),qi::int_,parsed);
return parsed;
}
const int http_session::request_header_parser(const std::string& request_str,bstcon::request& request_containar) const
{
namespace qi = boost::spirit::qi;
std::string::const_iterator it = request_str.cbegin();
qi::parse(
it,
request_str.cend(),
+(qi::char_-' ') >> ' ' >> +(qi::char_-' ') >> ' ' >> +(qi::char_-"\r\n") >> "\r\n",
request_containar.method, request_containar.uri, request_containar.http_version
);
qi::parse(
it,
request_str.cend(),
*( +(qi::char_-':') >> ": " >> +(qi::char_-"\r\n") >> "\r\n" ) >> "\r\n",
request_containar.header
);
return std::distance(request_str.cbegin(),it);
}
} // namespace session
} // namespace bstcon
#endif