X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=src%2Ffilter_z3950_client.cpp;h=0dcadcb8ae667d8721f99e2e43d04cab11ac9272;hb=4bfec20c393570a81471c644fad6268eed3dba29;hp=0c775e74fe1659d10c6c1ddfc67e56f19ff57270;hpb=79100c2ae2dac4bdde4f4d46b69e147562b4ec6c;p=metaproxy-moved-to-github.git diff --git a/src/filter_z3950_client.cpp b/src/filter_z3950_client.cpp index 0c775e7..0dcadcb 100644 --- a/src/filter_z3950_client.cpp +++ b/src/filter_z3950_client.cpp @@ -1,15 +1,26 @@ -/* $Id: filter_z3950_client.cpp,v 1.24 2006-03-16 10:40:59 adam Exp $ - Copyright (c) 2005-2006, Index Data. +/* This file is part of Metaproxy. + Copyright (C) 2005-2011 Index Data -%LICENSE% - */ +Metaproxy 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, or (at your option) any later +version. + +Metaproxy 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 "config.hpp" -#include "filter.hpp" -#include "package.hpp" -#include "util.hpp" #include "filter_z3950_client.hpp" +#include +#include #include #include @@ -18,15 +29,16 @@ #include #include +#include #include #include #include #include -#include -#include -#include +#include +#include +#include namespace mp = metaproxy_1; namespace yf = mp::filter; @@ -54,15 +66,22 @@ namespace metaproxy_1 { bool m_waiting; bool m_destroyed; bool m_connected; + bool m_has_closed; int m_queue_len; int m_time_elapsed; int m_time_max; + int m_time_connect_max; std::string m_host; }; class Z3950Client::Rep { public: + // number of seconds to wait before we give up request int m_timeout_sec; + int m_max_sockets; + bool m_force_close; + std::string m_default_target; + std::string m_force_target; boost::mutex m_mutex; boost::condition m_cond_session_ready; std::map m_clients; @@ -82,8 +101,9 @@ yf::Z3950Client::Assoc::Assoc(yazpp_1::SocketManager *socket_manager, : Z_Assoc(PDU_Observable), m_socket_manager(socket_manager), m_PDU_Observable(PDU_Observable), m_package(0), m_in_use(true), m_waiting(false), - m_destroyed(false), m_connected(false), m_queue_len(1), - m_time_elapsed(0), m_time_max(timeout_sec), + m_destroyed(false), m_connected(false), m_has_closed(false), + m_queue_len(1), + m_time_elapsed(0), m_time_max(timeout_sec), m_time_connect_max(10), m_host(host) { // std::cout << "create assoc " << this << "\n"; @@ -122,7 +142,8 @@ void yf::Z3950Client::Assoc::failNotify() void yf::Z3950Client::Assoc::timeoutNotify() { m_time_elapsed++; - if (m_time_elapsed >= m_time_max) + if ((m_connected && m_time_elapsed >= m_time_max) + || (!m_connected && m_time_elapsed >= m_time_connect_max)) { m_waiting = false; @@ -166,6 +187,8 @@ yazpp_1::IPDU_Observer *yf::Z3950Client::Assoc::sessionNotify( yf::Z3950Client::Z3950Client() : m_p(new yf::Z3950Client::Rep) { m_p->m_timeout_sec = 30; + m_p->m_max_sockets = 0; + m_p->m_force_close = false; } yf::Z3950Client::~Z3950Client() { @@ -179,19 +202,21 @@ yf::Z3950Client::Assoc *yf::Z3950Client::Rep::get_assoc(Package &package) std::map::iterator it; Z_GDU *gdu = package.request().get(); - // only deal with Z39.50 - if (!gdu || gdu->which != Z_GDU_Z3950) - { - package.move(); - return 0; - } + + int max_sockets = package.origin().get_max_sockets(); + if (max_sockets == 0) + max_sockets = m_max_sockets; + + std::string host; + it = m_clients.find(package.session()); if (it != m_clients.end()) { it->second->m_queue_len++; - while(true) + while (true) { #if 0 + // double init .. NOT working yet if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which == Z_APDU_initRequest) { @@ -210,6 +235,11 @@ yf::Z3950Client::Assoc *yf::Z3950Client::Rep::get_assoc(Package &package) m_cond_session_ready.wait(lock); } } + if (!gdu || gdu->which != Z_GDU_Z3950) + { + package.move(); + return 0; + } // new Z39.50 session .. Z_APDU *apdu = gdu->u.z3950; // check that it is init. If not, close @@ -224,40 +254,98 @@ yf::Z3950Client::Assoc *yf::Z3950Client::Rep::get_assoc(Package &package) package.session().close(); return 0; } - std::list vhosts; - mp::util::get_vhost_otherinfo(&apdu->u.initRequest->otherInfo, - true, vhosts); - size_t no_vhosts = vhosts.size(); - if (no_vhosts == 0) - { - mp::odr odr; - package.response() = odr.create_initResponse( - apdu, - YAZ_BIB1_INIT_NEGOTIATION_OPTION_REQUIRED, - "z3950_client: No virtal host given"); - - package.session().close(); - return 0; - } - if (no_vhosts > 1) + std::string target = m_force_target; + if (!target.length()) { - mp::odr odr; - package.response() = odr.create_initResponse( - apdu, - YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP, - "z3950_client: Can not cope with multiple vhosts"); - package.session().close(); - return 0; + target = m_default_target; + std::list vhosts; + mp::util::remove_vhost_otherinfo(&apdu->u.initRequest->otherInfo, + vhosts); + size_t no_vhosts = vhosts.size(); + if (no_vhosts == 1) + { + std::list::const_iterator v_it = vhosts.begin(); + target = *v_it; + } + else if (no_vhosts == 0) + { + if (!target.length()) + { + // no default target. So we don't know where to connect + mp::odr odr; + package.response() = odr.create_initResponse( + apdu, + YAZ_BIB1_INIT_NEGOTIATION_OPTION_REQUIRED, + "z3950_client: No vhost given"); + + package.session().close(); + return 0; + } + } + else if (no_vhosts > 1) + { + mp::odr odr; + package.response() = odr.create_initResponse( + apdu, + YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP, + "z3950_client: Can not cope with multiple vhosts"); + package.session().close(); + return 0; + } } - std::list::const_iterator v_it = vhosts.begin(); + std::list dblist; - std::string host; - mp::util::split_zurl(*v_it, host, dblist); + mp::util::split_zurl(target, host, dblist); if (dblist.size()) { ; // z3950_client: Databases in vhost ignored } + + // see if we have reached max number of clients (max-sockets) + + while (max_sockets) + { + int no_not_in_use = 0; + int number = 0; + it = m_clients.begin(); + for (; it != m_clients.end(); it++) + { + yf::Z3950Client::Assoc *as = it->second; + if (!strcmp(as->m_host.c_str(), host.c_str())) + { + number++; + if (!as->m_in_use) + no_not_in_use++; + } + } + yaz_log(YLOG_LOG, "Found %d/%d connections for %s", number, max_sockets, + host.c_str()); + if (number < max_sockets) + break; + if (no_not_in_use == 0) // all in use.. + { + mp::odr odr; + + package.response() = odr.create_initResponse( + apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, "max sessions"); + package.session().close(); + return 0; + } + boost::xtime xt; + xtime_get(&xt, boost::TIME_UTC); + + xt.sec += 15; + if (!m_cond_session_ready.timed_wait(lock, xt)) + { + mp::odr odr; + + package.response() = odr.create_initResponse( + apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, "max sessions"); + package.session().close(); + return 0; + } + } yazpp_1::SocketManager *sm = new yazpp_1::SocketManager; yazpp_1::PDU_Assoc *pdu_as = new yazpp_1::PDU_Assoc(sm); @@ -271,21 +359,35 @@ yf::Z3950Client::Assoc *yf::Z3950Client::Rep::get_assoc(Package &package) void yf::Z3950Client::Rep::send_and_receive(Package &package, yf::Z3950Client::Assoc *c) { - Z_GDU *gdu = package.request().get(); - if (c->m_destroyed) return; + c->m_package = &package; + + if (package.session().is_closed() && c->m_connected && !c->m_has_closed + && m_force_close) + { + mp::odr odr; + + package.request() = odr.create_close( + 0, Z_Close_finished, "z3950_client"); + c->m_package = 0; // don't inspect response + } + Z_GDU *gdu = package.request().get(); + if (!gdu || gdu->which != Z_GDU_Z3950) return; + if (gdu->u.z3950->which == Z_APDU_close) + c->m_has_closed = true; + + // prepare connect c->m_time_elapsed = 0; - c->m_package = &package; c->m_waiting = true; if (!c->m_connected) { c->client(c->m_host.c_str()); - c->timeout(1); + c->timeout(1); // so timeoutNotify gets called once per second while (!c->m_destroyed && c->m_waiting && c->m_socket_manager->processEvent() > 0) @@ -304,7 +406,7 @@ void yf::Z3950Client::Rep::send_and_receive(Package &package, int len; c->send_GDU(gdu, &len); - switch(gdu->u.z3950->which) + switch (gdu->u.z3950->which) { case Z_APDU_triggerResourceControlRequest: // request only.. @@ -326,28 +428,20 @@ void yf::Z3950Client::Rep::release_assoc(Package &package) it = m_clients.find(package.session()); if (it != m_clients.end()) { - Z_GDU *gdu = package.request().get(); - if (gdu && gdu->which == Z_GDU_Z3950) - { // only Z39.50 packages lock in get_assoc.. release it - it->second->m_in_use = false; - it->second->m_queue_len--; - } + it->second->m_in_use = false; + it->second->m_queue_len--; if (package.session().is_closed()) { // destroy hint (send_and_receive) it->second->m_destroyed = true; - - // wait until no one is waiting for it. - while (it->second->m_queue_len) - m_cond_session_ready.wait(lock); - - // the Z_Assoc and PDU_Assoc must be destroyed before - // the socket manager.. so pull that out.. first.. - yazpp_1::SocketManager *s = it->second->m_socket_manager; - delete it->second; // destroy Z_Assoc - delete s; // then manager - m_clients.erase(it); + if (it->second->m_queue_len == 0) + { + yazpp_1::SocketManager *s = it->second->m_socket_manager; + delete it->second; // destroy Z_Assoc + delete s; // then manager + m_clients.erase(it); + } } m_cond_session_ready.notify_all(); } @@ -359,11 +453,12 @@ void yf::Z3950Client::process(Package &package) const if (c) { m_p->send_and_receive(package, c); + m_p->release_assoc(package); } - m_p->release_assoc(package); } -void yf::Z3950Client::configure(const xmlNode *ptr) +void yf::Z3950Client::configure(const xmlNode *ptr, bool test_only, + const char *path) { for (ptr = ptr->children; ptr; ptr = ptr->next) { @@ -371,12 +466,23 @@ void yf::Z3950Client::configure(const xmlNode *ptr) continue; if (!strcmp((const char *) ptr->name, "timeout")) { - std::string timeout_str = mp::xml::get_text(ptr); - int timeout_sec = atoi(timeout_str.c_str()); - if (timeout_sec < 2) - throw mp::filter::FilterException("Bad timeout value " - + timeout_str); - m_p->m_timeout_sec = timeout_sec; + m_p->m_timeout_sec = mp::xml::get_int(ptr, 30); + } + else if (!strcmp((const char *) ptr->name, "default_target")) + { + m_p->m_default_target = mp::xml::get_text(ptr); + } + else if (!strcmp((const char *) ptr->name, "force_target")) + { + m_p->m_force_target = mp::xml::get_text(ptr); + } + else if (!strcmp((const char *) ptr->name, "max-sockets")) + { + m_p->m_max_sockets = mp::xml::get_int(ptr, 0); + } + else if (!strcmp((const char *) ptr->name, "force_close")) + { + m_p->m_force_close = mp::xml::get_bool(ptr, 0); } else { @@ -403,8 +509,9 @@ extern "C" { /* * Local variables: * c-basic-offset: 4 + * c-file-style: "Stroustrup" * indent-tabs-mode: nil - * c-file-style: "stroustrup" * End: * vim: shiftwidth=4 tabstop=8 expandtab */ +