icinga2/lib/icinga/macroprocessor.cpp

124 lines
4.2 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-present 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 "icinga/macroprocessor.h"
#include "icinga/macroresolver.h"
#include "base/utility.h"
#include "base/array.h"
#include "base/objectlock.h"
#include "base/logger_fwd.h"
#include "base/context.h"
#include <boost/foreach.hpp>
using namespace icinga;
Value MacroProcessor::ResolveMacros(const Value& str, const std::vector<MacroResolver::Ptr>& resolvers,
const CheckResult::Ptr& cr, const MacroProcessor::EscapeCallback& escapeFn, const Array::Ptr& escapeMacros)
{
Value result;
if (str.IsEmpty())
return Empty;
if (str.IsScalar()) {
result = InternalResolveMacros(str, resolvers, cr, escapeFn, escapeMacros);
} else if (str.IsObjectType<Array>()) {
Array::Ptr resultArr = make_shared<Array>();
Array::Ptr arr = str;
ObjectLock olock(arr);
BOOST_FOREACH(const Value& arg, arr) {
/* Note: don't escape macros here. */
resultArr->Add(InternalResolveMacros(arg, resolvers, cr, EscapeCallback(), Array::Ptr()));
}
result = resultArr;
} else {
BOOST_THROW_EXCEPTION(std::invalid_argument("Command is not a string or array."));
}
return result;
}
bool MacroProcessor::ResolveMacro(const String& macro, const std::vector<MacroResolver::Ptr>& resolvers,
const CheckResult::Ptr& cr, String *result)
{
CONTEXT("Resolving macro '" + macro + "'");
BOOST_FOREACH(const MacroResolver::Ptr& resolver, resolvers) {
if (resolver->ResolveMacro(macro, cr, result))
return true;
}
return false;
}
String MacroProcessor::InternalResolveMacros(const String& str, const std::vector<MacroResolver::Ptr>& resolvers,
const CheckResult::Ptr& cr, const MacroProcessor::EscapeCallback& escapeFn, const Array::Ptr& escapeMacros)
{
CONTEXT("Resolving macros for string '" + str + "'");
size_t offset, pos_first, pos_second;
offset = 0;
String result = str;
while ((pos_first = result.FindFirstOf("$", offset)) != String::NPos) {
pos_second = result.FindFirstOf("$", pos_first + 1);
if (pos_second == String::NPos)
BOOST_THROW_EXCEPTION(std::runtime_error("Closing $ not found in macro format string."));
String name = result.SubStr(pos_first + 1, pos_second - pos_first - 1);
String resolved_macro;
bool found = ResolveMacro(name, resolvers, cr, &resolved_macro);
/* $$ is an escape sequence for $. */
if (name.IsEmpty()) {
resolved_macro = "$";
found = true;
}
if (!found)
Log(LogWarning, "icinga", "Macro '" + name + "' is not defined.");
if (escapeFn && escapeMacros) {
bool escape = false;
ObjectLock olock(escapeMacros);
BOOST_FOREACH(const String& escapeMacro, escapeMacros) {
if (escapeMacro == name) {
escape = true;
break;
}
}
if (escape)
resolved_macro = escapeFn(resolved_macro);
}
result.Replace(pos_first, pos_second - pos_first + 1, resolved_macro);
offset = pos_first + resolved_macro.GetLength();
}
return result;
}