/usr/include/autobahn/wamp_session.ipp is in autobahn-cpp-dev 17.5.1+git7cc5d37-2.
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//
// Copyright (c) Crossbar.io Technologies GmbH and contributors
//
// Boost Software License - Version 1.0 - August 17th, 2003
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
///////////////////////////////////////////////////////////////////////////////
#include "exceptions.hpp"
#include "wamp_call.hpp"
#include "wamp_event.hpp"
#include "wamp_invocation.hpp"
#include "wamp_message.hpp"
#include "wamp_message_type.hpp"
#include "wamp_publication.hpp"
#include "wamp_registration.hpp"
#include "wamp_register_request.hpp"
#include "wamp_subscribe_request.hpp"
#include "wamp_subscription.hpp"
#include "wamp_transport.hpp"
#include "wamp_unregister_request.hpp"
#include "wamp_unsubscribe_request.hpp"
#include "wamp_authenticate.hpp"
#include "wamp_challenge.hpp"
#include "wamp_auth_utils.hpp"
#if !(defined(_WIN32) || defined(WIN32))
#include <arpa/inet.h>
#include <unistd.h>
#endif
#include <boost/system/error_code.hpp>
#include <cstdint>
#include <exception>
#include <iostream>
#include <sstream>
#include <stdlib.h>
namespace autobahn {
inline wamp_session::wamp_session(
boost::asio::io_service& io_service,
bool debug_enabled)
: m_debug_enabled(debug_enabled)
, m_io_service(io_service)
, m_transport()
, m_request_id(0)
, m_session_id(0)
, m_goodbye_sent(false)
, m_running(false)
{
}
inline wamp_session::~wamp_session()
{
}
inline boost::future<void> wamp_session::start()
{
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
if (m_running) {
m_session_start.set_exception(boost::copy_exception(protocol_error("session already started")));
return;
}
if (!m_transport) {
m_session_start.set_exception(boost::copy_exception(no_transport_error()));
return;
}
m_running = true;
m_session_start.set_value();
});
return m_session_start.get_future();
}
inline boost::future<void> wamp_session::stop()
{
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
if (!m_running) {
m_session_stop.set_exception(boost::copy_exception(protocol_error("session already stopped")));
return;
}
if (!m_transport) {
m_session_start.set_exception(boost::copy_exception(no_transport_error()));
return;
}
if (m_session_id) {
m_session_stop.set_exception(boost::copy_exception(protocol_error("session still joined")));
return;
}
m_running = false;
m_session_stop.set_value();
});
return m_session_stop.get_future();
}
inline boost::future<uint64_t> wamp_session::join(
const std::string& realm,
const std::vector<std::string>& authentication_methods,
const std::string& authentication_id)
{
msgpack::zone zone;
std::unordered_map<std::string, msgpack::object> roles;
std::unordered_map<std::string, bool> caller_features;
caller_features["call_timeout"] = true;
std::unordered_map<std::string, msgpack::object> caller;
caller["features"] = msgpack::object(caller_features, zone);
roles["caller"] = msgpack::object(caller, zone);
std::unordered_map<std::string, bool> callee_features;
callee_features["call_timeout"] = true;
std::unordered_map<std::string, msgpack::object> callee;
callee["features"] = msgpack::object(callee_features, zone);
roles["callee"] = msgpack::object(callee, zone);
std::unordered_map<std::string, msgpack::object> publisher;
roles["publisher"] = msgpack::object(publisher, zone);
std::unordered_map<std::string, msgpack::object> subscriber;
roles["subscriber"] = msgpack::object(subscriber, zone);
std::unordered_map<std::string, msgpack::object> details;
details["roles"] = msgpack::object(roles, zone);
details["authmethods"] = msgpack::object(authentication_methods, zone);
details["authid"] = msgpack::object(authentication_id, zone);
auto message = std::make_shared<wamp_message>(3, std::move(zone));
message->set_field(0, static_cast<int>(message_type::HELLO));
message->set_field(1, realm);
message->set_field(2, details);
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
if (m_session_id) {
m_session_join.set_exception(boost::copy_exception(protocol_error("session already joined")));
return;
}
try {
send_message(std::move(*message), false);
} catch (const std::exception& e) {
m_session_join.set_exception(boost::copy_exception(e));
}
});
return m_session_join.get_future();
}
inline boost::future<std::string> wamp_session::leave(const std::string& reason)
{
auto message = std::make_shared<wamp_message>(3);
message->set_field(0, static_cast<int>(message_type::GOODBYE));
message->set_field(1, std::unordered_map<int, int>() /* No Details */);
message->set_field(2, reason);
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
if (m_goodbye_sent) {
m_session_leave.set_exception(boost::copy_exception(protocol_error("goodbye already sent")));
}
try {
send_message(std::move(*message), false);
m_goodbye_sent = true;
} catch (const std::exception& e) {
m_session_leave.set_exception(boost::copy_exception(e));
}
m_session_id = 0;
});
return m_session_leave.get_future();
}
inline boost::future<void> wamp_session::publish(const std::string& topic,const wamp_publish_options& options)
{
uint64_t request_id = ++m_request_id;
auto message = std::make_shared<wamp_message>(4);
message->set_field(0, static_cast<int>(message_type::PUBLISH));
message->set_field(1, request_id);
message->set_field(2, options);
message->set_field(3, topic);
auto result = std::make_shared<boost::promise<void>>();
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message));
result->set_value();
} catch (const std::exception& e) {
result->set_exception(boost::copy_exception(e));
}
});
return result->get_future();
}
template <typename List>
inline boost::future<void> wamp_session::publish(const std::string& topic, const List& arguments,const wamp_publish_options& options)
{
uint64_t request_id = ++m_request_id;
auto message = std::make_shared<wamp_message>(5);
message->set_field(0, static_cast<int>(message_type::PUBLISH));
message->set_field(1, request_id);
message->set_field(2, options);
message->set_field(3, topic);
message->set_field(4, arguments);
auto result = std::make_shared<boost::promise<void>>();
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message));
result->set_value();
} catch (const std::exception& e) {
result->set_exception(boost::copy_exception(e));
}
});
return result->get_future();
}
template <typename List, typename Map>
inline boost::future<void> wamp_session::publish(
const std::string& topic, const List& arguments, const Map& kw_arguments,const wamp_publish_options& options)
{
uint64_t request_id = ++m_request_id;
auto message = std::make_shared<wamp_message>(6);
message->set_field(0, static_cast<int>(message_type::PUBLISH));
message->set_field(1, request_id);
message->set_field(2, options);
message->set_field(3, topic);
message->set_field(4, arguments);
message->set_field(5, kw_arguments);
auto result = std::make_shared<boost::promise<void>>();
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message));
result->set_value();
} catch (const std::exception& e) {
result->set_exception(boost::copy_exception(e));
}
});
return result->get_future();
}
inline boost::future<wamp_subscription> wamp_session::subscribe(
const std::string& topic,
const wamp_event_handler& handler,
const wamp_subscribe_options& options)
{
uint64_t request_id = ++m_request_id;
auto message = std::make_shared<wamp_message>(4);
message->set_field(0, static_cast<int>(message_type::SUBSCRIBE));
message->set_field(1, request_id);
message->set_field(2, options);
message->set_field(3, topic);
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
auto subscribe_request = std::make_shared<wamp_subscribe_request>(handler);
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message));
m_subscribe_requests.emplace(request_id, subscribe_request);
} catch (const std::exception& e) {
subscribe_request->response().set_exception(boost::copy_exception(e));
}
});
return subscribe_request->response().get_future();
}
inline boost::future<void> wamp_session::unsubscribe(const wamp_subscription& subscription)
{
uint64_t request_id = ++m_request_id;
auto message = std::make_shared<wamp_message>(3);
message->set_field(0, static_cast<int>(message_type::UNSUBSCRIBE));
message->set_field(1, request_id);
message->set_field(2, subscription.id());
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
auto unsubscribe_request = std::make_shared<wamp_unsubscribe_request>(subscription);
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message));
m_unsubscribe_requests.emplace(request_id, unsubscribe_request);
} catch (const std::exception& e) {
unsubscribe_request->response().set_exception(boost::copy_exception(e));
}
});
return unsubscribe_request->response().get_future();
}
inline boost::future<wamp_call_result> wamp_session::call(
const std::string& procedure,
const wamp_call_options& options)
{
uint64_t request_id = ++m_request_id;
auto message = std::make_shared<wamp_message>(4);
message->set_field(0, static_cast<int>(message_type::CALL));
message->set_field(1, request_id);
message->set_field(2, options);
message->set_field(3, procedure);
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
auto call = std::make_shared<wamp_call>();
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message));
m_calls.emplace(request_id, call);
} catch (const std::exception& e) {
call->result().set_exception(boost::copy_exception(e));
}
});
return call->result().get_future();
}
template<typename List>
inline boost::future<wamp_call_result> wamp_session::call(
const std::string& procedure,
const List& arguments,
const wamp_call_options& options)
{
uint64_t request_id = ++m_request_id;
auto message = std::make_shared<wamp_message>(5);
message->set_field(0, static_cast<int>(message_type::CALL));
message->set_field(1, request_id);
message->set_field(2, options);
message->set_field(3, procedure);
message->set_field(4, arguments);
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
auto call = std::make_shared<wamp_call>();
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message));
m_calls.emplace(request_id, call);
} catch (const std::exception& e) {
call->result().set_exception(boost::copy_exception(e));
}
});
return call->result().get_future();
}
template<typename List, typename Map>
inline boost::future<wamp_call_result> wamp_session::call(
const std::string& procedure,
const List& arguments,
const Map& kw_arguments,
const wamp_call_options& options)
{
uint64_t request_id = ++m_request_id;
auto message = std::make_shared<wamp_message>(6);
message->set_field(0, static_cast<int>(message_type::CALL));
message->set_field(1, request_id);
message->set_field(2, options);
message->set_field(3, procedure);
message->set_field(4, arguments);
message->set_field(5, kw_arguments);
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
auto call = std::make_shared<wamp_call>();
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message));
m_calls.emplace(request_id, call);
} catch (const std::exception& e) {
call->result().set_exception(boost::copy_exception(e));
}
});
return call->result().get_future();
}
inline boost::future<wamp_registration> wamp_session::provide(
const std::string& name,
const wamp_procedure& procedure,
const provide_options& options)
{
uint64_t request_id = ++m_request_id;
auto message = std::make_shared<wamp_message>(4);
message->set_field(0, static_cast<int>(message_type::REGISTER));
message->set_field(1, request_id);
message->set_field(2, options);
message->set_field(3, name);
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
auto register_request = std::make_shared<wamp_register_request>(procedure);
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message));
m_register_requests.emplace(request_id, register_request);
} catch (const std::exception& e) {
register_request->response().set_exception(boost::copy_exception(e));
}
});
return register_request->response().get_future();
}
inline boost::future<void> wamp_session::unprovide(const wamp_registration& registration)
{
uint64_t request_id = ++m_request_id;
auto message = std::make_shared<wamp_message>(3);
message->set_field(0, static_cast<int>(message_type::UNREGISTER));
message->set_field(1, request_id);
message->set_field(2, registration.id());
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
auto unregister_request = std::make_shared<wamp_unregister_request>(registration);
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message));
m_unregister_requests.emplace(request_id, unregister_request);
}
catch (const std::exception& e) {
unregister_request->response().set_exception(boost::copy_exception(e));
}
});
return unregister_request->response().get_future();
}
inline boost::future<wamp_authenticate> wamp_session::on_challenge(const wamp_challenge& challenge)
{
// a dummy implementation
boost::promise<wamp_authenticate> dummy;
dummy.set_value( wamp_authenticate( "" ) );
return dummy.get_future();
}
inline void wamp_session::on_attach(const std::shared_ptr<wamp_transport>& transport)
{
// FIXME: We should be deferring this operation to the io service. This
// will almost certainly require us to return a future here to
// all the caller to sync up with the actual attaching of the
// transport.
if (m_transport) {
throw protocol_error("Transport already attached to session");
}
// This should never be possible as you cannot start a session without
// having a transport already attached.
assert(!m_running);
m_transport = transport;
}
inline void wamp_session::on_detach(bool was_clean, const std::string& reason)
{
// FIXME: We should be deferring this operation to the io service. This
// will almost certainly require us to return a future here to
// all the caller to sync up with the actual detaching of the
// transport.
if (!m_transport) {
throw protocol_error("Transport already detached from session");
}
// FIXME: Figure out what to do if we are detaching a transport
// from a session that is still running. Ideally we would
// not detach the transport until m_session_stop is satisfied.
// Perhaps we could use the same promise/future discussed above.
// One side effect here will be if the transport is re-used for
// another session as it may still receive messages for the old
// session.
assert(!m_running);
m_transport.reset();
}
inline void wamp_session::on_message(wamp_message&& message)
{
// FIXME: Move this check into the transport
//if (obj.type != msgpack::type::ARRAY) {
// throw protocol_error("invalid message structure - message is not an array");
//}
if (message.size() < 1) {
throw protocol_error("invalid message structure - missing message code");
}
if (!message.is_field_type(0, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("invalid message code type - not an integer");
}
message_type code = static_cast<message_type>(message.field<int>(0));
switch (code) {
case message_type::HELLO:
throw protocol_error("received HELLO message unexpected for WAMP client roles");
case message_type::WELCOME:
process_welcome(std::move(message));
break;
case message_type::ABORT:
process_abort(std::move(message));
break;
case message_type::CHALLENGE:
process_challenge(std::move(message));
break;
case message_type::AUTHENTICATE:
throw protocol_error("received AUTHENTICATE message unexpected for WAMP client roles");
case message_type::GOODBYE:
process_goodbye(std::move(message));
break;
case message_type::HEARTBEAT:
// FIXME
break;
case message_type::ERROR:
process_error(std::move(message));
break;
case message_type::PUBLISH:
throw protocol_error("received PUBLISH message unexpected for WAMP client roles");
case message_type::PUBLISHED:
// FIXME
break;
case message_type::SUBSCRIBE:
throw protocol_error("received SUBSCRIBE message unexpected for WAMP client roles");
case message_type::SUBSCRIBED:
process_subscribed(std::move(message));
break;
case message_type::UNSUBSCRIBE:
throw protocol_error("received UNSUBSCRIBE message unexpected for WAMP client roles");
case message_type::UNSUBSCRIBED:
process_unsubscribed(std::move(message));
break;
case message_type::EVENT:
process_event(std::move(message));
break;
case message_type::CALL:
throw protocol_error("received CALL message unexpected for WAMP client roles");
case message_type::CANCEL:
throw protocol_error("received CANCEL message unexpected for WAMP client roles");
case message_type::RESULT:
process_call_result(std::move(message));
break;
case message_type::REGISTER:
throw protocol_error("received REGISTER message unexpected for WAMP client roles");
case message_type::REGISTERED:
process_registered(std::move(message));
break;
case message_type::UNREGISTER:
throw protocol_error("received UNREGISTER message unexpected for WAMP client roles");
case message_type::UNREGISTERED:
// FIXME
break;
case message_type::INVOCATION:
process_invocation(std::move(message));
break;
case message_type::INTERRUPT:
throw protocol_error("received INTERRUPT message - not implemented");
case message_type::YIELD:
throw protocol_error("received YIELD message unexpected for WAMP client roles");
}
}
inline void wamp_session::process_challenge(wamp_message&& message)
{
// kind of authentication
std::string whatAuth = message.field<std::string>(1);
/////////////////////////////////////////
// wampcra authentication
/////////////////////////////////////////
wamp_challenge challenge_object("");
if (whatAuth == "wampcra") {
if (!message.is_field_type(2, msgpack::type::MAP)) {
throw protocol_error("CHALLENGE - Details must be a dictionary");
}
std::string challenge, salt;
int iterations = 0 , keylen = 0;
// parse the details, and fill variables above
try {
std::unordered_map<std::string, msgpack::object> details;
message.field(2).convert(details);
auto itr = details.find("challenge");
if (itr != details.end()) {
challenge = itr->second.as<std::string>();
} else {
throw protocol_error("wampcra must always introduce a challenge ( in details )");
}
itr = details.find("salt");
if (itr != details.end()) {
// ok we must salt our secret
salt = itr->second.as<std::string>();
itr = details.find("iterations");
if (itr == details.end()) {
throw protocol_error("wampcra must always tell a number of iterations when introducing salting ( in details )");
}
iterations = itr->second.as<int>();
itr = details.find("keylen");
if (itr == details.end()) {
throw protocol_error("wampcra must always tell a key length (keylen) when introducing salting ( in details )");
}
keylen = itr->second.as<int>();
}
// make the challenge object
challenge_object = wamp_challenge("wampcra",challenge,salt,iterations,keylen);
} catch (const std::exception&) {
if (m_debug_enabled) {
std::cerr << "failed to parse challenge details" << std::endl;
}
throw protocol_error("wampcra authentication: Failed parse challange details");
};
/////////////////////////////////////////
// ticket authentication
/////////////////////////////////////////
} else if ( whatAuth == "ticket" ) {
// make the challenge object
challenge_object = wamp_challenge("ticket");
}
else {
throw protocol_error("not supported challenge type - can now only handle 'wampcra' and 'ticket'");
}
// I am not sure if this is neccesary. Looking at other
// comments in this code and the examples, it seems like the
// context_response should live at least until the end of
// the lambda callback - below
std::shared_ptr< boost::future< void > > context_response = std::make_shared< boost::future<void> >();
// call the context, to get a signature...
(*context_response) = on_challenge(challenge_object).then([=]( boost::future<wamp_authenticate> fu_auth) {
try {
const wamp_authenticate sig = fu_auth.get();
auto message = std::make_shared<wamp_message>(3);
message->set_field(0, static_cast<int>(message_type::AUTHENTICATE));
message->set_field(1, sig.signature());
message->set_field(2, std::unordered_map<int, int>() /* No Extra/Dict */);
auto weak_self = std::weak_ptr<wamp_session>(this->shared_from_this());
m_io_service.dispatch([=]() {
auto shared_self = weak_self.lock();
if (!shared_self) {
return;
}
try {
send_message(std::move(*message), false);
} catch (const std::exception&) {
if (m_debug_enabled) {
std::cerr << "failed to handle authentication" << std::endl;
}
throw protocol_error("authentication error: failed send signature");
}
});
// make sure the context_response is copied into this lambda...
context_response.get();
} catch (const std::exception&) {
if (m_debug_enabled) {
std::cerr << "failed to handle authentication" << std::endl;
}
throw protocol_error("authentication error: failed send signature");
}
});
}
inline void wamp_session::process_welcome(wamp_message&& message)
{
m_session_id = message.field<uint64_t>(1);
message.field(2).convert(m_welcome_details);
m_session_join.set_value(m_session_id);
}
inline void wamp_session::process_abort(wamp_message&& message)
{
// [ABORT, Details|dict, Reason|uri]
if (message.size() != 3 ) {
throw protocol_error("ABORT - length must be 3");
}
// Details|dict
if (!message.is_field_type(1, msgpack::type::MAP)) {
throw protocol_error("ABORT - Details must be a dictionary");
}
// Reason|uri
if (!message.is_field_type(2, msgpack::type::STR)) {
throw protocol_error("ABORT - REASON must be a string (URI)");
}
std::string uri = message.field<std::string>(2);
m_session_join.set_exception(boost::copy_exception(abort_error(uri)));
}
inline void wamp_session::process_goodbye(wamp_message&& message)
{
m_session_id = 0;
// if we did not initiate closing, reply ..
if (!m_goodbye_sent) {
// [GOODBYE, Details|dict, Reason|uri]
wamp_message goodbye(3);
goodbye.set_field(0, static_cast<int>(message_type::GOODBYE));
goodbye.set_field(1, std::unordered_map<int,int>() /* No Details */);
goodbye.set_field(2, std::string("wamp.error.goodbye_and_out"));
send_message(std::move(goodbye));
} else {
// we previously initiated closing, so this
// is the peer reply.
}
std::string reason = message.field<std::string>(2);
m_session_leave.set_value(reason);
}
inline void wamp_session::process_error(wamp_message&& message)
{
// [ERROR, REQUEST.Type|int, REQUEST.Request|id, Details|dict, Error|uri]
// [ERROR, REQUEST.Type|int, REQUEST.Request|id, Details|dict, Error|uri, Arguments|list]
// [ERROR, REQUEST.Type|int, REQUEST.Request|id, Details|dict, Error|uri, Arguments|list, ArgumentsKw|dict]
if (message.size() < 5 || message.size() > 7) {
throw protocol_error("invalid ERROR message structure - length must be 5, 6 or 7");
}
// REQUEST.Type|int
//
if (!message.is_field_type(1, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("invalid ERROR message structure - REQUEST.Type must be an integer");
}
auto request_type = static_cast<message_type>(message.field<int>(1));
if (request_type != message_type::CALL &&
request_type != message_type::REGISTER &&
request_type != message_type::UNREGISTER &&
request_type != message_type::PUBLISH &&
request_type != message_type::SUBSCRIBE &&
request_type != message_type::UNSUBSCRIBE) {
throw protocol_error("invalid ERROR message - ERROR.Type must one of CALL, REGISTER, UNREGISTER, SUBSCRIBE, UNSUBSCRIBE");
}
// REQUEST.Request|id
if (!message.is_field_type(2, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("invalid ERROR message structure - REQUEST.Request must be an integer");
}
auto request_id = message.field<uint64_t>(2);
// Details
if (!message.is_field_type(3, msgpack::type::MAP)) {
throw protocol_error("invalid ERROR message structure - Details must be a dictionary");
}
// Error|uri
if (!message.is_field_type(4, msgpack::type::STR)) {
throw protocol_error("invalid ERROR message - Error must be a string (URI)");
}
auto error = message.field<std::string>(4);
// Arguments|list
if (message.size() > 5) {
if (!message.is_field_type(5, msgpack::type::ARRAY)) {
throw protocol_error("invalid ERROR message structure - Arguments must be a list");
}
}
// ArgumentsKw|list
if (message.size() > 6) {
if (!message.is_field_type(6, msgpack::type::MAP)) {
throw protocol_error("invalid ERROR message structure - ArgumentsKw must be a dictionary");
}
try {
auto kw_args = message.field<std::unordered_map<std::string, std::string>>(6);
const auto itr = kw_args.find("what");
if (itr != kw_args.end()) {
error += ": ";
error += itr->second;
}
} catch (const std::exception&) {
if (m_debug_enabled) {
std::cerr << "failed to parse error message keyword arguments" << std::endl;
}
error += ": unknown exception";
}
}
switch (request_type) {
case message_type::CALL:
{
//
// process CALL ERROR
//
auto call_itr = m_calls.find(request_id);
if (call_itr != m_calls.end()) {
// FIXME: Forward all error info.
call_itr->second->result().set_exception(boost::copy_exception(std::runtime_error(error)));
m_calls.erase(call_itr);
} else {
throw protocol_error("bogus ERROR message for non-pending CALL request ID: " + error);
}
}
break;
case message_type::REGISTER:
{
auto reg_itr = m_register_requests.find(request_id);
if (reg_itr != m_register_requests.end())
{
reg_itr->second->response().set_exception(boost::copy_exception(std::runtime_error(error)));
m_register_requests.erase(reg_itr);
} else {
throw protocol_error("bogus ERROR message for non-pending REGISTER request ID: " + error);
}
}
break;
case message_type::UNREGISTER:
{
auto unreg_itr = m_unregister_requests.find(request_id);
if (unreg_itr != m_unregister_requests.end())
{
unreg_itr->second->response().set_exception(boost::copy_exception(std::runtime_error(error)));
m_unregister_requests.erase(unreg_itr);
} else {
throw protocol_error("bogus ERROR message for non-pending UNREGISTER request ID: " + error);
}
}
break;
case message_type::PUBLISH:
{
//TODO: there's currently no way to get to the future returned by the publish function
// but there needs to be something more sensibly then just propagating the error to the
// function running the io_service
throw protocol_error("Received ERROR for a PUBLISH request: " + error);
}
break;
case message_type::SUBSCRIBE:
{
auto sub_itr = m_subscribe_requests.find(request_id);
if (sub_itr != m_subscribe_requests.end())
{
sub_itr->second->response().set_exception(boost::copy_exception(std::runtime_error(error)));
m_subscribe_requests.erase(sub_itr);
} else {
throw protocol_error("bogus ERROR message for non-pending SUBSCRIBE request ID: " + error);
}
}
break;
case message_type::UNSUBSCRIBE:
{
auto unsub_itr = m_unsubscribe_requests.find(request_id);
if (unsub_itr != m_unsubscribe_requests.end())
{
unsub_itr->second->response().set_exception(boost::copy_exception(std::runtime_error(error)));
m_unsubscribe_requests.erase(unsub_itr);
} else {
throw protocol_error("bogus ERROR message for non-pending UNSUBSCRIBE request ID: " + error);
}
}
break;
default:
throw protocol_error("unhandled ERROR message: " + error);
break;
}
}
inline void wamp_session::process_invocation(wamp_message&& message)
{
// [INVOCATION, Request|id, REGISTERED.Registration|id, Details|dict]
// [INVOCATION, Request|id, REGISTERED.Registration|id, Details|dict, CALL.Arguments|list]
// [INVOCATION, Request|id, REGISTERED.Registration|id, Details|dict, CALL.Arguments|list, CALL.ArgumentsKw|dict]
if (message.size() < 4 || message.size() > 6) {
throw protocol_error("INVOCATION message length must be 4, 5 or 6");
}
if (!message.is_field_type(1, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("INVOCATION.Request must be an integer");
}
uint64_t request_id = message.field<uint64_t>(1);
if (!message.is_field_type(2, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("INVOCATION.Registration must be an integer");
}
uint64_t registration_id = message.field<uint64_t>(2);
auto procedure_itr = m_procedures.find(registration_id);
if (procedure_itr != m_procedures.end()) {
if (!message.is_field_type(3, msgpack::type::MAP)) {
throw protocol_error("INVOCATION.Details must be a map");
}
wamp_invocation invocation = std::make_shared<wamp_invocation_impl>();
invocation->set_request_id(request_id);
invocation->set_details(message.field(3));
if (message.size() > 4) {
if (!message.is_field_type(4, msgpack::type::ARRAY)) {
throw protocol_error("INVOCATION.Arguments must be an array/vector");
}
invocation->set_arguments(message.field(4));
if (message.size() > 5) {
if (!message.is_field_type(5, msgpack::type::MAP)) {
throw protocol_error("INVOCATION.KwArguments must be a map");
}
invocation->set_kw_arguments(message.field(5));
}
}
invocation->set_zone(std::move(message.zone()));
auto weak_this = std::weak_ptr<wamp_session>(this->shared_from_this());
auto send_result_fn = [weak_this] (const std::shared_ptr<wamp_message>& message) {
// Make sure the session still exists, since the invocation could run
// on a different thread.
auto shared_this = weak_this.lock();
if (!shared_this) {
return; // FIXME: or throw exception?
}
// Send to the io_service thread, and make sure the session still exists (again).
shared_this->m_io_service.dispatch([weak_this, message] {
auto shared_this = weak_this.lock();
if (!shared_this) {
return; // FIXME: or throw exception?
}
shared_this->send_message(std::move(*message));
});
};
invocation->set_send_result_fn(std::move(send_result_fn));
try {
if (m_debug_enabled) {
std::cerr << "Invoking procedure registered under " << registration_id << std::endl;
}
procedure_itr->second(invocation);
}
// FIXME: implement Autobahn-specific exception with error URI
catch (const std::exception& e) {
// we can at least describe the error with e.what()
//
if (invocation->sendable()) {
std::map<std::string, std::string> error_kw_arguments;
error_kw_arguments["what"] = e.what();
invocation->error("wamp.error.runtime_error", EMPTY_ARGUMENTS, error_kw_arguments);
}
}
catch (...) {
// no information available on actual error
//
if (invocation->sendable()) {
invocation->error("wamp.error.runtime_error");
}
}
} else {
throw protocol_error("bogus INVOCATION message for non-registered registration ID");
}
}
inline void wamp_session::process_call_result(wamp_message&& message)
{
// [RESULT, CALL.Request|id, Details|dict]
// [RESULT, CALL.Request|id, Details|dict, YIELD.Arguments|list]
// [RESULT, CALL.Request|id, Details|dict, YIELD.Arguments|list, YIELD.ArgumentsKw|dict]
if (message.size() < 3 || message.size() > 5) {
throw protocol_error("RESULT - length must be 3, 4 or 5");
}
if (!message.is_field_type(1, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("RESULT - CALL.Request must be an id");
}
uint64_t request_id = message.field<uint64_t>(1);
auto call_itr = m_calls.find(request_id);
if (call_itr != m_calls.end()) {
if (!message.is_field_type(2, msgpack::type::MAP)) {
throw protocol_error("RESULT - Details must be a dictionary");
}
wamp_call_result result(std::move(message.zone()));
if (message.size() > 3) {
if (!message.is_field_type(3, msgpack::type::ARRAY)) {
throw protocol_error("RESULT - YIELD.Arguments must be a list");
}
result.set_arguments(message.field(3));
if (message.size() > 4) {
if (!message.is_field_type(4, msgpack::type::MAP)) {
throw protocol_error("RESULT - YIELD.ArgumentsKw must be a dictionary");
}
result.set_kw_arguments(message.field(4));
}
}
call_itr->second->set_result(std::move(result));
m_calls.erase(call_itr);
} else {
throw protocol_error("bogus RESULT message for non-pending request ID");
}
}
inline void wamp_session::process_subscribed(wamp_message&& message)
{
// [SUBSCRIBED, SUBSCRIBE.Request|id, Subscription|id]
if (message.size() != 3) {
throw protocol_error("SUBSCRIBED - length must be 3");
}
if (!message.is_field_type(1, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("SUBSCRIBED - SUBSCRIBED.Request must be an integer");
}
uint64_t request_id = message.field<uint64_t>(1);
auto subscribe_request_itr = m_subscribe_requests.find(request_id);
if (subscribe_request_itr != m_subscribe_requests.end()) {
if (!message.is_field_type(2, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("SUBSCRIBED - SUBSCRIBED.Subscription must be an integer");
}
uint64_t subscription_id = message.field<uint64_t>(2);
m_subscription_handlers.insert(
std::make_pair(subscription_id, subscribe_request_itr->second->handler()));
subscribe_request_itr->second->set_response(wamp_subscription(subscription_id));
m_subscribe_requests.erase(request_id);
} else {
throw protocol_error("SUBSCRIBED - no pending request ID");
}
}
inline void wamp_session::process_unsubscribed(wamp_message&& message)
{
// [UNSUBSCRIBED, UNSUBSCRIBE.Request|id]
if (message.size() != 2) {
throw protocol_error("UNSUBSCRIBED - length must be 2");
}
if (!message.is_field_type(1, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("UNSUBSCRIBED - UNSUBSCRIBED.Request must be an integer");
}
uint64_t request_id = message.field<uint64_t>(1);
auto unsubscribe_request_itr = m_unsubscribe_requests.find(request_id);
if (unsubscribe_request_itr != m_unsubscribe_requests.end()) {
uint64_t subscription_id = unsubscribe_request_itr->second->subscription().id();
m_subscription_handlers.erase(subscription_id);
unsubscribe_request_itr->second->set_response();
m_unsubscribe_requests.erase(request_id);
} else {
throw protocol_error("UNSUBSCRIBED - no pending request ID");
}
}
inline void wamp_session::process_event(wamp_message&& message)
{
// [EVENT, SUBSCRIBED.Subscription|id, PUBLISHED.Publication|id, Details|dict]
// [EVENT, SUBSCRIBED.Subscription|id, PUBLISHED.Publication|id, Details|dict, PUBLISH.Arguments|list]
// [EVENT, SUBSCRIBED.Subscription|id, PUBLISHED.Publication|id, Details|dict, PUBLISH.Arguments|list, PUBLISH.ArgumentsKw|dict]
if (message.size() < 4 || message.size() > 6) {
throw protocol_error("EVENT - length must be 4, 5 or 6");
}
if (!message.is_field_type(1, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("EVENT - SUBSCRIBED.Subscription must be an integer");
}
uint64_t subscription_id = message.field<uint64_t>(1);
auto subscription_handlers_itr = m_subscription_handlers.lower_bound(subscription_id);
auto subscription_handlers_end = m_subscription_handlers.upper_bound(subscription_id);
if (subscription_handlers_itr != m_subscription_handlers.end() &&
subscription_handlers_itr != subscription_handlers_end) {
if (!message.is_field_type(2, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("EVENT - PUBLISHED.Publication must be an id");
}
//uint64_t publication_id = message[2].as<uint64_t>();
if (!message.is_field_type(3, msgpack::type::MAP)) {
throw protocol_error("EVENT - Details must be a dictionary");
}
wamp_event event(std::move(message.zone()));
event.set_details(message.field(3));
if (message.size() > 4) {
if (!message.is_field_type(4, msgpack::type::ARRAY)) {
throw protocol_error("EVENT - EVENT.Arguments must be a list");
}
event.set_arguments(message.field(4));
if (message.size() > 5) {
if (!message.is_field_type(5, msgpack::type::MAP)) {
throw protocol_error("EVENT - EVENT.ArgumentsKw must be a dictionary");
}
event.set_kw_arguments(message.field(5));
}
}
try {
// now trigger the user supplied event handler ..
//
while (subscription_handlers_itr != subscription_handlers_end) {
(subscription_handlers_itr->second)(event);
++subscription_handlers_itr;
}
} catch (...) {
if (m_debug_enabled) {
std::cerr << "Warning: event handler threw exception" << std::endl;
}
}
} else {
// silently swallow EVENT for non-existent subscription IDs.
// We may have just unsubscribed, this EVENT might be have
// already been in-flight.
if (m_debug_enabled) {
std::cerr << "EVENT - non-existent subscription ID " << subscription_id << std::endl;
}
}
}
inline void wamp_session::process_registered(wamp_message&& message)
{
// [REGISTERED, REGISTER.Request|id, Registration|id]
if (message.size() != 3) {
throw protocol_error("REGISTERED - length must be 3");
}
if (!message.is_field_type(1, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("REGISTERED - REGISTERED.Request must be an integer");
}
uint64_t request_id = message.field<uint64_t>(1);
auto register_request_itr = m_register_requests.find(request_id);
if (register_request_itr != m_register_requests.end()) {
if (!message.is_field_type(2, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("REGISTERED - REGISTERED.Registration must be an integer");
}
uint64_t registration_id = message.field<uint64_t>(2);
m_procedures[registration_id] = register_request_itr->second->procedure();
register_request_itr->second->set_response(wamp_registration(registration_id));
m_register_requests.erase(register_request_itr);
} else {
throw protocol_error("REGISTERED - no pending request ID");
}
}
inline void wamp_session::process_unregistered(wamp_message&& message)
{
// [UNREGISTERED, UNREGISTER.Request|id]
if (message.size() != 2) {
throw protocol_error("UNREGISTERED - length must be 2");
}
if (!message.is_field_type(1, msgpack::type::POSITIVE_INTEGER)) {
throw protocol_error("UNREGISTERED - UNREGISTERED.Request must be an integer");
}
uint64_t request_id = message.field<uint64_t>(1);
auto unregister_request_itr = m_unregister_requests.find(request_id);
if (unregister_request_itr != m_unregister_requests.end()) {
uint64_t registration_id = unregister_request_itr->second->registration().id();
m_procedures.erase(registration_id);
unregister_request_itr->second->set_response();
m_unregister_requests.erase(request_id);
} else {
throw protocol_error("UNREGISTERED - no pending request ID");
}
}
inline void wamp_session::send_message(wamp_message&& message, bool session_established)
{
if (!m_running) {
throw protocol_error("session not running");
}
if (!m_transport) {
throw no_transport_error();
}
if (!m_transport->is_connected()) {
throw no_transport_error();
}
if (session_established && !m_session_id) {
throw no_session_error();
}
m_transport->send_message(std::move(message));
}
inline const std::unordered_map<std::string, msgpack::object>& wamp_session::welcome_details()
{
return m_welcome_details;
}
} // namespace autobahn
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