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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 <tnt/httprequest.h>
#include <tnt/tntconfig.h>
#include <functional>
#include <iterator>
#include <algorithm>
#include <sstream>
#include <cxxtools/log.h>
log_define("tntnet.dispatcher")
namespace tnt
{
namespace
{
std::ostream& operator<< (std::ostream& out, const Mapping& r)
{
out << r.getVHost() << ':'
<< r.getUrl();
if (r.getSsl() != SSL_ALL || !r.getMethod().empty())
out << ':' << r.getMethod();
if (r.getSsl() == SSL_NO)
out << ":NOSSL";
else if (r.getSsl() == SSL_YES)
out << ":SSL";
return out;
}
}
Mapping::Mapping(const std::string& vhost, const std::string& url,
const std::string& method, int ssl, const Maptarget& target)
: _vhost(vhost),
_url(url),
_method(method),
_ssl(ssl),
_regexVhost(vhost),
_regexUrl(url),
_regexMethod(method),
_target(target)
{ }
Mapping& Mapping::pushArg(const std::string& value)
{
std::ostringstream k;
k << "arg" << _target.getArgs().size();
return setArg(k.str(), value);
}
bool Mapping::match(const HttpRequest& request, cxxtools::RegexSMatch& smatch) const
{
return (_vhost.empty() || _regexVhost.match(request.getHost()))
&& (_url.empty() || _regexUrl.match(request.getUrl(), smatch))
&& (_method.empty() || _regexMethod.match(request.getMethod()))
&& (_ssl == SSL_ALL
|| (_ssl == SSL_YES && request.isSsl())
|| (_ssl == SSL_NO && !request.isSsl()));
}
Dispatcher::UrlMapCacheKey::UrlMapCacheKey(const HttpRequest& request, urlmap_type::size_type pos)
: _vhost(request.getHost()),
_url(request.getUrl()),
_method(request.getMethod()),
_ssl(request.isSsl()),
_pos(pos)
{
}
bool Dispatcher::UrlMapCacheKey::operator< (const UrlMapCacheKey& other) const
{
int c;
c = _vhost.compare(other._vhost);
if (c != 0)
return c < 0;
c = _url.compare(other._url);
if (c != 0)
return c < 0;
c = _method.compare(other._method);
if (c != 0)
return c < 0;
if (_ssl != other._ssl)
return _ssl < other._ssl;
return _pos < other._pos;
}
Mapping& Dispatcher::addUrlMapEntry(const std::string& vhost,
const std::string& url, const std::string& method, int ssl, const Maptarget& ci)
{
cxxtools::WriteLock lock(_mutex);
log_debug("map vhost <" << vhost << "> url <" << url << "> method <" << method << "> ssl <" << ssl << "> to <" << ci << '>');
_urlmap.push_back(Mapping(vhost, url, method, ssl, ci));
return _urlmap.back();
}
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); }
};
}
Maptarget Dispatcher::mapCompNext(const HttpRequest& request,
Dispatcher::urlmap_type::size_type& pos) const
{
std::string vhost = request.getHost();
std::string compUrl = request.getUrl();
if (pos < _urlmap.size())
{
// check cache
cxxtools::ReadLock lock(_urlMapCacheMutex, false);
urlMapCacheType::key_type cacheKey(request, pos);
log_debug("host=\"" << cacheKey.getHost() << "\" url=\"" << cacheKey.getUrl() << "\" method=\"" << cacheKey.getMethod() << "\" ssl=" << cacheKey.getSsl() << " pos=" << cacheKey.getPos());
if (TntConfig::it().maxUrlMapCache > 0)
{
lock.lock();
urlMapCacheType::const_iterator um = _urlMapCache.find(cacheKey);
if (um != _urlMapCache.end())
{
pos = um->second.pos;
log_debug("match <" << _urlmap[pos] << "> => " << um->second.ci << " (cached)");
return um->second.ci;
}
log_debug("entry not found in cache");
}
else
log_debug("cache disabled");
// no cache hit
regmatch_formatter formatter;
for (; pos < _urlmap.size(); ++pos)
{
if (_urlmap[pos].match(request, formatter.what))
{
const Maptarget& src = _urlmap[pos].getTarget();
Maptarget ci;
ci.libname = formatter(src.libname);
ci.compname = formatter(src.compname);
ci.setHttpReturn(src.getHttpReturn());
if (src.hasPathInfo())
ci.setPathInfo(formatter(src.getPathInfo()));
for (Maptarget::args_type::const_iterator it = src.getArgs().begin(); it != src.getArgs().end(); ++it)
ci._args[it->first] = formatter(it->second);
if (TntConfig::it().maxUrlMapCache > 0)
{
lock.unlock();
cxxtools::WriteLock wlock(_urlMapCacheMutex);
// clear cache after maxUrlMapCache distinct requests
if (_urlMapCache.size() > TntConfig::it().maxUrlMapCache)
{
log_warn("clear url-map-cache");
_urlMapCache.clear();
}
_urlMapCache.insert(urlMapCacheType::value_type(cacheKey, UrlMapCacheValue(ci, pos)));
}
log_debug("match <" << _urlmap[pos] << "> => " << ci);
return ci;
}
else
{
log_debug("no match <" << _urlmap[pos] << '>');
}
}
}
throw NotFoundException(compUrl, vhost);
}
Maptarget Dispatcher::PosType::getNext()
{
if (_first)
_first = false;
else
++_pos;
return _dis.mapCompNext(_request, _pos);
}
}
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