2012-06-04 16:48:31 +02:00
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/*
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2014-03-30 12:09:21 +02:00
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* nghttp2 - HTTP/2 C Library
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2012-06-04 16:48:31 +02:00
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "shrpx_listen_handler.h"
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2012-06-08 14:40:03 +02:00
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#include <unistd.h>
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2012-06-05 18:26:04 +02:00
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#include <cerrno>
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2013-08-19 17:07:01 +02:00
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#include <thread>
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2012-06-05 18:26:04 +02:00
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2012-06-04 16:48:31 +02:00
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#include <event2/bufferevent_ssl.h>
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#include "shrpx_client_handler.h"
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2012-06-05 18:26:04 +02:00
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#include "shrpx_thread_event_receiver.h"
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#include "shrpx_ssl.h"
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#include "shrpx_worker.h"
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2014-08-12 15:22:02 +02:00
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#include "shrpx_worker_config.h"
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2012-11-18 13:23:13 +01:00
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#include "shrpx_config.h"
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2013-11-04 09:53:57 +01:00
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#include "shrpx_http2_session.h"
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2014-06-26 15:55:22 +02:00
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#include "util.h"
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using namespace nghttp2;
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2012-06-04 16:48:31 +02:00
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namespace shrpx {
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2013-02-07 13:13:36 +01:00
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ListenHandler::ListenHandler(event_base *evbase, SSL_CTX *sv_ssl_ctx,
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SSL_CTX *cl_ssl_ctx)
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2012-06-04 16:48:31 +02:00
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: evbase_(evbase),
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2013-02-07 13:13:36 +01:00
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sv_ssl_ctx_(sv_ssl_ctx),
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cl_ssl_ctx_(cl_ssl_ctx),
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2014-03-09 06:53:28 +01:00
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rate_limit_group_(bufferevent_rate_limit_group_new
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(evbase, get_config()->worker_rate_limit_cfg)),
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2014-08-12 15:22:02 +02:00
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evlistener4_(nullptr),
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evlistener6_(nullptr),
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2014-06-26 15:55:22 +02:00
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worker_stat_(util::make_unique<WorkerStat>()),
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2014-08-12 15:22:02 +02:00
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worker_round_robin_cnt_(0),
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num_worker_shutdown_(0)
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2012-06-04 16:48:31 +02:00
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{}
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ListenHandler::~ListenHandler()
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2014-03-09 06:53:28 +01:00
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{
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bufferevent_rate_limit_group_free(rate_limit_group_);
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}
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2012-06-04 16:48:31 +02:00
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2014-07-05 11:22:40 +02:00
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void ListenHandler::worker_reopen_log_files()
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{
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WorkerEvent wev;
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memset(&wev, 0, sizeof(wev));
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wev.type = REOPEN_LOG;
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for(auto& info : workers_) {
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2014-08-12 15:22:02 +02:00
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bufferevent_write(info->bev, &wev, sizeof(wev));
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2014-07-05 11:22:40 +02:00
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}
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}
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2014-08-17 11:50:10 +02:00
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#ifndef NOTHREADS
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2014-08-12 15:22:02 +02:00
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namespace {
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void worker_writecb(bufferevent *bev, void *ptr)
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{
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auto listener_handler = static_cast<ListenHandler*>(ptr);
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auto output = bufferevent_get_output(bev);
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2014-08-19 14:33:54 +02:00
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if(!worker_config->graceful_shutdown ||
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2014-08-12 15:22:02 +02:00
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evbuffer_get_length(output) != 0) {
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return;
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}
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// If graceful_shutdown is true and nothing left to send, we sent
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// graceful shutdown event to worker successfully. The worker is
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// now doing shutdown.
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listener_handler->notify_worker_shutdown();
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// Disable bev so that this won' be called accidentally in the
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// future.
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bufferevent_disable(bev, EV_READ | EV_WRITE);
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}
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} // namespace
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2014-08-17 11:50:10 +02:00
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#endif // NOTHREADS
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2014-08-12 15:22:02 +02:00
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2012-06-05 18:26:04 +02:00
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void ListenHandler::create_worker_thread(size_t num)
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{
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2014-08-17 11:50:10 +02:00
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#ifndef NOTHREADS
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2014-07-05 11:22:40 +02:00
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workers_.resize(0);
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2012-06-05 18:26:04 +02:00
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for(size_t i = 0; i < num; ++i) {
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int rv;
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2014-08-12 15:22:02 +02:00
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auto info = util::make_unique<WorkerInfo>();
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2014-08-13 15:09:35 +02:00
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rv = socketpair(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0,
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info->sv);
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2012-06-05 18:26:04 +02:00
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if(rv == -1) {
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2014-08-13 15:13:08 +02:00
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auto error = errno;
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LLOG(ERROR, this) << "socketpair() failed: errno=" << error;
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2012-06-05 18:26:04 +02:00
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continue;
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}
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2014-08-12 15:22:02 +02:00
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info->sv_ssl_ctx = sv_ssl_ctx_;
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info->cl_ssl_ctx = cl_ssl_ctx_;
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info->fut = std::async(std::launch::async, start_threaded_worker,
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info.get());
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auto bev = bufferevent_socket_new(evbase_, info->sv[0],
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2013-08-19 17:16:55 +02:00
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BEV_OPT_DEFER_CALLBACKS);
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2013-09-24 16:17:53 +02:00
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if(!bev) {
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LLOG(ERROR, this) << "bufferevent_socket_new() failed";
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for(size_t j = 0; j < 2; ++j) {
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2014-08-12 15:22:02 +02:00
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close(info->sv[j]);
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2013-09-24 16:17:53 +02:00
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}
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continue;
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}
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2014-07-05 11:22:40 +02:00
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2014-08-12 15:22:02 +02:00
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bufferevent_setcb(bev, nullptr, worker_writecb, nullptr, this);
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info->bev = bev;
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workers_.push_back(std::move(info));
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2014-07-05 11:22:40 +02:00
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2013-01-21 14:42:49 +01:00
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if(LOG_ENABLED(INFO)) {
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2014-07-05 11:22:40 +02:00
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LLOG(INFO, this) << "Created thread #" << workers_.size() - 1;
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2012-06-05 18:26:04 +02:00
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}
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}
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2014-08-17 11:50:10 +02:00
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#endif // NOTHREADS
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2012-06-05 18:26:04 +02:00
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}
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2014-08-12 15:22:02 +02:00
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void ListenHandler::join_worker()
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{
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2014-08-17 11:50:10 +02:00
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#ifndef NOTHREADS
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2014-08-12 15:22:02 +02:00
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int n = 0;
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if(LOG_ENABLED(INFO)) {
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LLOG(INFO, this) << "Waiting for worker thread to join: n="
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<< workers_.size();
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}
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for(auto& worker : workers_) {
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worker->fut.get();
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if(LOG_ENABLED(INFO)) {
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LLOG(INFO, this) << "Thread #" << n << " joined";
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}
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++n;
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}
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2014-08-17 11:50:10 +02:00
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#endif // NOTHREADS
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2014-08-12 15:22:02 +02:00
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}
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void ListenHandler::graceful_shutdown_worker()
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{
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if(get_config()->num_worker == 1) {
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return;
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}
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for(auto& worker : workers_) {
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WorkerEvent wev;
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memset(&wev, 0, sizeof(wev));
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wev.type = GRACEFUL_SHUTDOWN;
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if(LOG_ENABLED(INFO)) {
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LLOG(INFO, this) << "Sending graceful shutdown signal to worker";
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}
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auto output = bufferevent_get_output(worker->bev);
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if(evbuffer_add(output, &wev, sizeof(wev)) != 0) {
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LLOG(FATAL, this) << "evbuffer_add() failed";
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}
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}
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}
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2012-06-04 16:48:31 +02:00
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int ListenHandler::accept_connection(evutil_socket_t fd,
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sockaddr *addr, int addrlen)
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{
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2013-01-21 14:42:49 +01:00
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if(LOG_ENABLED(INFO)) {
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2012-12-09 11:15:14 +01:00
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LLOG(INFO, this) << "Accepted connection. fd=" << fd;
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2012-06-04 16:48:31 +02:00
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}
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2014-08-12 15:22:02 +02:00
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evutil_make_socket_closeonexec(fd);
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2014-07-05 11:22:40 +02:00
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if(get_config()->num_worker == 1) {
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2014-06-26 15:55:22 +02:00
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if(worker_stat_->num_connections >=
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get_config()->worker_frontend_connections) {
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if(LOG_ENABLED(INFO)) {
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TLOG(INFO, this) << "Too many connections >="
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<< get_config()->worker_frontend_connections;
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}
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close(fd);
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return -1;
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}
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2014-03-09 06:53:28 +01:00
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auto client = ssl::accept_connection(evbase_, rate_limit_group_,
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2014-06-26 15:55:22 +02:00
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sv_ssl_ctx_, fd, addr, addrlen,
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worker_stat_.get());
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2013-09-24 16:17:53 +02:00
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if(!client) {
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LLOG(ERROR, this) << "ClientHandler creation failed";
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2014-06-26 15:55:22 +02:00
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close(fd);
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return -1;
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2013-09-24 16:17:53 +02:00
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}
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2014-06-26 15:55:22 +02:00
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2014-06-26 17:39:53 +02:00
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client->set_http2_session(http2session_.get());
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2014-03-09 06:53:28 +01:00
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return 0;
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}
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2014-07-05 11:22:40 +02:00
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size_t idx = worker_round_robin_cnt_ % workers_.size();
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2014-03-09 06:53:28 +01:00
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++worker_round_robin_cnt_;
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WorkerEvent wev;
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memset(&wev, 0, sizeof(wev));
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2014-07-05 11:22:40 +02:00
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wev.type = NEW_CONNECTION;
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2014-03-09 06:53:28 +01:00
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wev.client_fd = fd;
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memcpy(&wev.client_addr, addr, addrlen);
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wev.client_addrlen = addrlen;
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2014-08-12 15:22:02 +02:00
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auto output = bufferevent_get_output(workers_[idx]->bev);
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2014-03-09 06:53:28 +01:00
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if(evbuffer_add(output, &wev, sizeof(wev)) != 0) {
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LLOG(FATAL, this) << "evbuffer_add() failed";
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2014-06-26 15:55:22 +02:00
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close(fd);
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2014-03-09 06:53:28 +01:00
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return -1;
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2012-06-04 16:48:31 +02:00
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}
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2014-06-26 15:55:22 +02:00
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2012-06-04 16:48:31 +02:00
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return 0;
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}
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event_base* ListenHandler::get_evbase() const
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{
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return evbase_;
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}
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2013-11-04 09:53:57 +01:00
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int ListenHandler::create_http2_session()
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2012-11-20 17:29:39 +01:00
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{
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int rv;
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2014-06-26 17:39:53 +02:00
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http2session_ = util::make_unique<Http2Session>(evbase_, cl_ssl_ctx_);
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2013-11-04 09:53:57 +01:00
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rv = http2session_->init_notification();
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2012-11-20 17:29:39 +01:00
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return rv;
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}
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2014-08-12 15:22:02 +02:00
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const WorkerStat* ListenHandler::get_worker_stat() const
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{
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return worker_stat_.get();
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}
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void ListenHandler::set_evlistener4(evconnlistener *evlistener4)
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{
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evlistener4_ = evlistener4;
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}
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evconnlistener* ListenHandler::get_evlistener4() const
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{
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return evlistener4_;
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}
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void ListenHandler::set_evlistener6(evconnlistener *evlistener6)
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{
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evlistener6_ = evlistener6;
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}
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evconnlistener* ListenHandler::get_evlistener6() const
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{
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return evlistener6_;
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}
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void ListenHandler::disable_evlistener()
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{
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if(evlistener4_) {
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evconnlistener_disable(evlistener4_);
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}
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if(evlistener6_) {
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evconnlistener_disable(evlistener6_);
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}
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}
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namespace {
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void perform_accept_pending_connection(ListenHandler *listener_handler,
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evconnlistener *listener)
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{
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if(!listener) {
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return;
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}
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auto server_fd = evconnlistener_get_fd(listener);
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for(;;) {
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sockaddr_union sockaddr;
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socklen_t addrlen = sizeof(sockaddr);
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auto fd = accept(server_fd, &sockaddr.sa, &addrlen);
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if(fd == -1) {
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if(errno == EINTR ||
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errno == ENETDOWN ||
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errno == EPROTO ||
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errno == ENOPROTOOPT ||
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errno == EHOSTDOWN ||
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errno == ENONET ||
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errno == EHOSTUNREACH ||
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errno == EOPNOTSUPP ||
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errno == ENETUNREACH) {
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continue;
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}
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return;
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}
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evutil_make_socket_nonblocking(fd);
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listener_handler->accept_connection(fd, &sockaddr.sa, addrlen);
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}
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}
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} // namespace
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void ListenHandler::accept_pending_connection()
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{
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perform_accept_pending_connection(this, evlistener4_);
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|
perform_accept_pending_connection(this, evlistener6_);
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}
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void ListenHandler::notify_worker_shutdown()
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|
{
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|
if(++num_worker_shutdown_ == workers_.size()) {
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|
|
event_base_loopbreak(evbase_);
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|
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}
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}
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2012-06-04 16:48:31 +02:00
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} // namespace shrpx
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