icinga2/lib/remote/eventshandler.cpp

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/******************************************************************************
* Icinga 2 *
2016-01-12 08:29:59 +01:00
* Copyright (C) 2012-2016 Icinga Development Team (https://www.icinga.org/) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "remote/eventshandler.hpp"
#include "remote/httputility.hpp"
#include "remote/filterutility.hpp"
#include "config/configcompiler.hpp"
#include "config/expression.hpp"
#include "base/objectlock.hpp"
#include "base/json.hpp"
#include <boost/foreach.hpp>
#include <boost/algorithm/string/replace.hpp>
using namespace icinga;
REGISTER_URLHANDLER("/v1/events", EventsHandler);
bool EventsHandler::HandleRequest(const ApiUser::Ptr& user, HttpRequest& request, HttpResponse& response)
{
if (request.RequestUrl->GetPath().size() != 2)
return false;
if (request.RequestMethod != "POST")
return false;
if (request.ProtocolVersion == HttpVersion10) {
HttpUtility::SendJsonError(response, 400, "HTTP/1.0 not supported for event streams.");
return true;
}
Dictionary::Ptr params = HttpUtility::FetchRequestParameters(request);
Array::Ptr types = params->Get("types");
if (!types) {
HttpUtility::SendJsonError(response, 400, "'types' query parameter is required.");
return true;
}
{
ObjectLock olock(types);
BOOST_FOREACH(const String& type, types) {
FilterUtility::CheckPermission(user, "events/" + type);
}
}
String queueName = HttpUtility::GetLastParameter(params, "queue");
if (queueName.IsEmpty()) {
HttpUtility::SendJsonError(response, 400, "'queue' query parameter is required.");
return true;
}
String filter = HttpUtility::GetLastParameter(params, "filter");
Expression *ufilter = NULL;
if (!filter.IsEmpty())
ufilter = ConfigCompiler::CompileText("<API query>", filter);
/* create a new queue or update an existing one */
EventQueue::Ptr queue = EventQueue::GetByName(queueName);
if (!queue) {
queue = new EventQueue();
EventQueue::Register(queueName, queue);
}
queue->SetTypes(types->ToSet<String>());
queue->SetFilter(ufilter);
queue->AddClient(&request);
response.SetStatus(200, "OK");
response.AddHeader("Content-Type", "application/json");
for (;;) {
Dictionary::Ptr result = queue->WaitForEvent(&request);
if (!response.IsPeerConnected()) {
queue->RemoveClient(&request);
EventQueue::UnregisterIfUnused(queueName, queue);
return true;
}
if (!result)
continue;
String body = JsonEncode(result);
boost::algorithm::replace_all(body, "\n", "");
try {
response.WriteBody(body.CStr(), body.GetLength());
response.WriteBody("\n", 1);
} catch (const std::exception&) {
queue->RemoveClient(&request);
EventQueue::UnregisterIfUnused(queueName, queue);
throw;
}
}
}