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/*
* Copyright (C) 2003-2005 Tommi Maekitalo
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "tnt/dispatcher.h"
#include <tnt/httperror.h>
#include <functional>
#include <iterator>
#include <algorithm>
#include <cxxtools/log.h>
log_define("tntnet.dispatcher")
namespace tnt
{
Dispatcher::CompidentType& Dispatcher::addUrlMapEntry(const std::string& vhost,
const std::string& url, const CompidentType& ci)
{
cxxtools::WriteLock lock(mutex);
log_debug("map vhost <" << vhost << "> url <" << url << "> to <" << ci << '>');
urlmap.push_back(urlmap_type::value_type(VHostRegex(vhost, url), ci));
return urlmap.back().second;
}
Compident Dispatcher::mapComp(const std::string& vhost,
const std::string& compUrl) const
{
urlmap_type::const_iterator pos = urlmap.begin();
return mapCompNext(vhost, compUrl, pos);
}
namespace {
class regmatch_formatter : public std::unary_function<const std::string&, std::string>
{
public:
cxxtools::RegexSMatch what;
std::string operator() (const std::string& s) const
{ return what.format(s); }
};
}
Dispatcher::urlMapCacheType::size_type Dispatcher::maxUrlMapCache = 8192;
Dispatcher::CompidentType Dispatcher::mapCompNext(const std::string& vhost,
const std::string& compUrl, Dispatcher::urlmap_type::const_iterator& pos) const
{
// check cache
cxxtools::ReadLock lock(urlMapCacheMutex, false);
urlMapCacheType::key_type cacheKey;
if (maxUrlMapCache > 0)
{
lock.lock();
cacheKey = urlMapCacheType::key_type(vhost, compUrl, pos);
urlMapCacheType::const_iterator um = urlMapCache.find(cacheKey);
if (um != urlMapCache.end())
{
log_debug("vhost <" << vhost << "> url <" << compUrl << "> match regex <" << um->second.pos->first.getRegex() << "> (cached) => " << um->second.ci);
pos = um->second.pos;
return um->second.ci;
}
}
// no cache hit
regmatch_formatter formatter;
for (; pos != urlmap.end(); ++pos)
{
if (pos->first.match(vhost, compUrl, formatter.what))
{
const CompidentType& src = pos->second;
CompidentType ci;
ci.libname = formatter(src.libname);
ci.compname = formatter(src.compname);
if (src.hasPathInfo())
ci.setPathInfo(formatter(src.getPathInfo()));
std::transform(src.getArgs().begin(), src.getArgs().end(),
std::back_inserter(ci.getArgsRef()), formatter);
if (maxUrlMapCache > 0)
{
// clear cache after maxUrlMapCache distinct requests
if (urlMapCache.size() >= maxUrlMapCache)
{
log_warn("clear url-map-cache");
urlMapCache.clear();
}
lock.unlock();
cxxtools::WriteLock wlock(urlMapCacheMutex);
urlMapCache.insert(urlMapCacheType::value_type(cacheKey, UrlMapCacheValue(ci, pos)));
}
log_debug("vhost <" << vhost << "> url <" << compUrl << "> match regex <" << pos->first.getRegex() << "> => " << ci);
return ci;
}
else
{
log_debug("vhost <" << vhost << "> url <" << compUrl << "> does not match regex <" << pos->first.getRegex() << '>');
}
}
throw NotFoundException(compUrl);
}
Dispatcher::CompidentType Dispatcher::PosType::getNext()
{
if (first)
first = false;
else
++pos;
return dis.mapCompNext(vhost, url, pos);
}
}
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