icinga2/lib/remote/filterutility.cpp

171 lines
5.3 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2015 Icinga Development Team (http://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/filterutility.hpp"
#include "remote/httputility.hpp"
#include "config/configcompiler.hpp"
#include "config/expression.hpp"
#include "base/json.hpp"
#include "base/configtype.hpp"
#include "base/logger.hpp"
#include <boost/foreach.hpp>
#include <boost/algorithm/string.hpp>
using namespace icinga;
Type::Ptr FilterUtility::TypeFromPluralName(const String& pluralName)
{
String uname = pluralName;
boost::algorithm::to_lower(uname);
BOOST_FOREACH(const ConfigType::Ptr& dtype, ConfigType::GetTypes()) {
Type::Ptr type = Type::GetByName(dtype->GetName());
ASSERT(type);
String pname = type->GetPluralName();
boost::algorithm::to_lower(pname);
if (uname == pname)
return type;
}
return Type::Ptr();
}
void ConfigObjectTargetProvider::FindTargets(const String& type, const boost::function<void (const Value&)>& addTarget) const
{
ConfigType::Ptr dtype = ConfigType::GetByName(type);
ASSERT(dtype);
BOOST_FOREACH(const ConfigObject::Ptr& object, dtype->GetObjects()) {
addTarget(object);
}
}
Value ConfigObjectTargetProvider::GetTargetByName(const String& type, const String& name) const
{
ConfigObject::Ptr obj = ConfigObject::GetObject(type, name);
if (!obj)
BOOST_THROW_EXCEPTION(std::invalid_argument("Object does not exist."));
return obj;
}
bool ConfigObjectTargetProvider::IsValidType(const String& type) const
{
return ConfigType::GetByName(type) != ConfigType::Ptr();
}
String ConfigObjectTargetProvider::GetPluralName(const String& type) const
{
return Type::GetByName(type)->GetPluralName();
}
static void FilteredAddTarget(ScriptFrame& frame, const String& varName, Expression *ufilter, std::vector<Value>& result, const Value& target)
{
frame.Locals->Set(varName, target);
if (Convert::ToBool(ufilter->Evaluate(frame)))
result.push_back(target);
}
std::vector<Value> FilterUtility::GetFilterTargets(const QueryDescription& qd, const Dictionary::Ptr& query)
{
std::vector<Value> result;
TargetProvider::Ptr provider;
if (qd.Provider)
provider = qd.Provider;
else
provider = new ConfigObjectTargetProvider();
BOOST_FOREACH(const String& type, qd.Types) {
String attr = type;
boost::algorithm::to_lower(attr);
if (attr == "type")
attr = "name";
if (query->Contains(attr))
result.push_back(provider->GetTargetByName(type, HttpUtility::GetLastParameter(query, attr)));
attr = provider->GetPluralName(type);
boost::algorithm::to_lower(attr);
if (query->Contains(attr)) {
Array::Ptr names = query->Get(attr);
if (names) {
ObjectLock olock(names);
BOOST_FOREACH(const String& name, names) {
result.push_back(provider->GetTargetByName(type, name));
}
}
}
}
if (query->Contains("filter") || result.empty()) {
if (!query->Contains("type"))
BOOST_THROW_EXCEPTION(std::invalid_argument("Type must be specified when using a filter."));
String filter;
if (!query->Contains("filter"))
filter = "true";
else
filter = HttpUtility::GetLastParameter(query, "filter");
String type = HttpUtility::GetLastParameter(query, "type");
Log(LogInformation, "FilterUtility", filter);
if (!provider->IsValidType(type))
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid type specified."));
if (qd.Types.find(type) == qd.Types.end())
BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid type specified for this query."));
Expression *ufilter = ConfigCompiler::CompileText("<API query>", filter);
ScriptFrame frame;
frame.Sandboxed = true;
Dictionary::Ptr filter_vars = query->Get("filter_vars");
if (filter_vars) {
ObjectLock olock(filter_vars);
BOOST_FOREACH(const Dictionary::Pair& kv, filter_vars) {
frame.Locals->Set(kv.first, kv.second);
}
}
String varName = type;
boost::algorithm::to_lower(varName);
try {
provider->FindTargets(type, boost::bind(&FilteredAddTarget, boost::ref(frame), varName, ufilter, boost::ref(result), _1));
} catch (const std::exception& ex) {
delete ufilter;
throw;
}
delete ufilter;
}
return result;
}