srs/trunk/src/app/srs_app_rtmp_conn.cpp

/*
The MIT License (MIT)

Copyright (c) 2013-2015 SRS(simple-rtmp-server)

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#include <srs_app_rtmp_conn.hpp>

#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/tcp.h>

using namespace std;

#include <srs_kernel_error.hpp>
#include <srs_kernel_log.hpp>
#include <srs_rtmp_sdk.hpp>
#include <srs_core_autofree.hpp>
#include <srs_app_source.hpp>
#include <srs_app_server.hpp>
#include <srs_app_pithy_print.hpp>
#include <srs_app_config.hpp>
#include <srs_app_refer.hpp>
#include <srs_app_hls.hpp>
#include <srs_app_bandwidth.hpp>
#include <srs_app_st_socket.hpp>
#include <srs_app_http_hooks.hpp>
#include <srs_app_edge.hpp>
#include <srs_app_utility.hpp>
#include <srs_rtmp_msg_array.hpp>
#include <srs_rtmp_amf0.hpp>
#include <srs_app_recv_thread.hpp>
#include <srs_core_performance.hpp>
#include <srs_kernel_utility.hpp>
#include <srs_app_security.hpp>
#include <srs_app_statistic.hpp>

// when stream is busy, for example, streaming is already
// publishing, when a new client to request to publish,
// sleep a while and close the connection.
#define SRS_STREAM_BUSY_SLEEP_US (int64_t)(3*1000*1000LL)

// the timeout to wait encoder to republish
// if timeout, close the connection.
#define SRS_REPUBLISH_SEND_TIMEOUT_US (int64_t)(3*60*1000*1000LL)
// if timeout, close the connection.
#define SRS_REPUBLISH_RECV_TIMEOUT_US (int64_t)(3*60*1000*1000LL)

// the timeout to wait client data, when client paused
// if timeout, close the connection.
#define SRS_PAUSED_SEND_TIMEOUT_US (int64_t)(30*60*1000*1000LL)
// if timeout, close the connection.
#define SRS_PAUSED_RECV_TIMEOUT_US (int64_t)(30*60*1000*1000LL)

// when edge timeout, retry next.
#define SRS_EDGE_TOKEN_TRAVERSE_TIMEOUT_US (int64_t)(3*1000*1000LL)

SrsRtmpConn::SrsRtmpConn(SrsServer* svr, st_netfd_t c)
    : SrsConnection(svr, c)
{
    server = svr;
    req = new SrsRequest();
    res = new SrsResponse();
    skt = new SrsStSocket(c);
    rtmp = new SrsRtmpServer(skt);
    refer = new SrsRefer();
    bandwidth = new SrsBandwidth();
    security = new SrsSecurity();
    duration = 0;
    kbps = new SrsKbps();
    kbps->set_io(skt, skt);
    
    mw_sleep = SRS_PERF_MW_SLEEP;
    mw_enabled = false;
    realtime = SRS_PERF_MIN_LATENCY_ENABLED;
    
    _srs_config->subscribe(this);
}

SrsRtmpConn::~SrsRtmpConn()
{
    _srs_config->unsubscribe(this);
    
    srs_freep(req);
    srs_freep(res);
    srs_freep(rtmp);
    srs_freep(skt);
    srs_freep(refer);
    srs_freep(bandwidth);
    srs_freep(security);
    srs_freep(kbps);
}

// TODO: return detail message when error for client.
int SrsRtmpConn::do_cycle()
{
    int ret = ERROR_SUCCESS;
    
    srs_trace("RTMP client ip=%s", ip.c_str());

    rtmp->set_recv_timeout(SRS_CONSTS_RTMP_RECV_TIMEOUT_US);
    rtmp->set_send_timeout(SRS_CONSTS_RTMP_SEND_TIMEOUT_US);
    
    if ((ret = rtmp->handshake()) != ERROR_SUCCESS) {
        srs_error("rtmp handshake failed. ret=%d", ret);
        return ret;
    }
    srs_verbose("rtmp handshake success");
    
    if ((ret = rtmp->connect_app(req)) != ERROR_SUCCESS) {
        srs_error("rtmp connect vhost/app failed. ret=%d", ret);
        return ret;
    }
    srs_verbose("rtmp connect app success");
    
    // set client ip to request.
    req->ip = ip;
    
    // discovery vhost, resolve the vhost from config
    SrsConfDirective* parsed_vhost = _srs_config->get_vhost(req->vhost);
    if (parsed_vhost) {
        req->vhost = parsed_vhost->arg0();
    }
    
    srs_info("discovery app success. schema=%s, vhost=%s, port=%s, app=%s",
        req->schema.c_str(), req->vhost.c_str(), req->port.c_str(), req->app.c_str());
    
    if (req->schema.empty() || req->vhost.empty() || req->port.empty() || req->app.empty()) {
        ret = ERROR_RTMP_REQ_TCURL;
        srs_error("discovery tcUrl failed. "
            "tcUrl=%s, schema=%s, vhost=%s, port=%s, app=%s, ret=%d",
            req->tcUrl.c_str(), req->schema.c_str(), req->vhost.c_str(), req->port.c_str(), req->app.c_str(), ret);
        return ret;
    }
    
    // check vhost
    if ((ret = check_vhost()) != ERROR_SUCCESS) {
        srs_error("check vhost failed. ret=%d", ret);
        return ret;
    }
    srs_verbose("check vhost success.");
    
    srs_trace("connect app, "
        "tcUrl=%s, pageUrl=%s, swfUrl=%s, schema=%s, vhost=%s, port=%s, app=%s, args=%s", 
        req->tcUrl.c_str(), req->pageUrl.c_str(), req->swfUrl.c_str(), 
        req->schema.c_str(), req->vhost.c_str(), req->port.c_str(),
        req->app.c_str(), (req->args? "(obj)":"null"));
    
    // show client identity
    if(req->args) {
        std::string srs_version;
        std::string srs_server_ip;
        int srs_pid = 0;
        int srs_id = 0;
        
        SrsAmf0Any* prop = NULL;
        if ((prop = req->args->ensure_property_string("srs_version")) != NULL) {
            srs_version = prop->to_str();
        }
        if ((prop = req->args->ensure_property_string("srs_server_ip")) != NULL) {
            srs_server_ip = prop->to_str();
        }
        if ((prop = req->args->ensure_property_number("srs_pid")) != NULL) {
            srs_pid = (int)prop->to_number();
        }
        if ((prop = req->args->ensure_property_number("srs_id")) != NULL) {
            srs_id = (int)prop->to_number();
        }
        
        srs_info("edge-srs ip=%s, version=%s, pid=%d, id=%d", 
            srs_server_ip.c_str(), srs_version.c_str(), srs_pid, srs_id);
        if (srs_pid > 0) {
            srs_trace("edge-srs ip=%s, version=%s, pid=%d, id=%d", 
                srs_server_ip.c_str(), srs_version.c_str(), srs_pid, srs_id);
        }
    }
    
    ret = service_cycle();
    http_hooks_on_close();
    SrsStatistic* stat = SrsStatistic::instance();
    stat->on_disconnect(_srs_context->get_id());
    
    return ret;
}

int SrsRtmpConn::on_reload_vhost_removed(string vhost)
{
    int ret = ERROR_SUCCESS;
    
    if (req->vhost != vhost) {
        return ret;
    }
    
    // if the vhost connected is removed, disconnect the client.
    srs_trace("vhost %s removed/disabled, close client url=%s", 
        vhost.c_str(), req->get_stream_url().c_str());
        
    srs_close_stfd(stfd);
    
    return ret;
}

int SrsRtmpConn::on_reload_vhost_mw(string vhost)
{
    int ret = ERROR_SUCCESS;
    
    if (req->vhost != vhost) {
        return ret;
    }
    
    int sleep_ms = _srs_config->get_mw_sleep_ms(req->vhost);
    
    // when mw_sleep changed, resize the socket send buffer.
    change_mw_sleep(sleep_ms);

    return ret;
}

int SrsRtmpConn::on_reload_vhost_realtime(string vhost)
{
    int ret = ERROR_SUCCESS;
    
    if (req->vhost != vhost) {
        return ret;
    }
    
    bool realtime_enabled = _srs_config->get_realtime_enabled(req->vhost);
    srs_trace("realtime changed %d=>%d", realtime, realtime_enabled);
    realtime = realtime_enabled;

    return ret;
}

void SrsRtmpConn::resample()
{
    kbps->resample();
}

int64_t SrsRtmpConn::get_send_bytes_delta()
{
    return kbps->get_send_bytes_delta();
}

int64_t SrsRtmpConn::get_recv_bytes_delta()
{
    return kbps->get_recv_bytes_delta();
}

void SrsRtmpConn::cleanup()
{
    kbps->cleanup();
}
    
int SrsRtmpConn::service_cycle()
{    
    int ret = ERROR_SUCCESS;
    
    if ((ret = rtmp->set_window_ack_size((int)(2.5 * 1000 * 1000))) != ERROR_SUCCESS) {
        srs_error("set window acknowledgement size failed. ret=%d", ret);
        return ret;
    }
    srs_verbose("set window acknowledgement size success");
        
    if ((ret = rtmp->set_peer_bandwidth((int)(2.5 * 1000 * 1000), 2)) != ERROR_SUCCESS) {
        srs_error("set peer bandwidth failed. ret=%d", ret);
        return ret;
    }
    srs_verbose("set peer bandwidth success");

    // get the ip which client connected.
    std::string local_ip = srs_get_local_ip(st_netfd_fileno(stfd));
    
    // do bandwidth test if connect to the vhost which is for bandwidth check.
    if (_srs_config->get_bw_check_enabled(req->vhost)) {
        return bandwidth->bandwidth_check(rtmp, skt, req, local_ip);
    }
    
    // do token traverse before serve it.
    // @see https://github.com/simple-rtmp-server/srs/pull/239
    if (true) {
        bool vhost_is_edge = _srs_config->get_vhost_is_edge(req->vhost);
        bool edge_traverse = _srs_config->get_vhost_edge_token_traverse(req->vhost);
        if (vhost_is_edge && edge_traverse) {
            if ((ret = check_edge_token_traverse_auth()) != ERROR_SUCCESS) {
                srs_warn("token auth failed, ret=%d", ret);
                return ret;
            }
        }
    }
    
    // response the client connect ok.
    if ((ret = rtmp->response_connect_app(req, local_ip.c_str())) != ERROR_SUCCESS) {
        srs_error("response connect app failed. ret=%d", ret);
        return ret;
    }
    srs_verbose("response connect app success");
        
    if ((ret = rtmp->on_bw_done()) != ERROR_SUCCESS) {
        srs_error("on_bw_done failed. ret=%d", ret);
        return ret;
    }
    srs_verbose("on_bw_done success");
    
    while (true) {
        ret = stream_service_cycle();
        
        // stream service must terminated with error, never success.
        srs_assert(ret != ERROR_SUCCESS);
        
        // when not system control error, fatal error, return.
        if (!srs_is_system_control_error(ret)) {
            if (ret != ERROR_SOCKET_TIMEOUT && !srs_is_client_gracefully_close(ret)) {
                srs_error("stream service cycle failed. ret=%d", ret);
            }
            return ret;
        }
        
        // for republish, continue service
        if (ret == ERROR_CONTROL_REPUBLISH) {
            // set timeout to a larger value, wait for encoder to republish.
            rtmp->set_send_timeout(SRS_REPUBLISH_RECV_TIMEOUT_US);
            rtmp->set_recv_timeout(SRS_REPUBLISH_SEND_TIMEOUT_US);
            
            srs_trace("control message(unpublish) accept, retry stream service.");
            continue;
        }
        
        // for "some" system control error, 
        // logical accept and retry stream service.
        if (ret == ERROR_CONTROL_RTMP_CLOSE) {
            // TODO: FIXME: use ping message to anti-death of socket.
            // @see: https://github.com/simple-rtmp-server/srs/issues/39
            // set timeout to a larger value, for user paused.
            rtmp->set_recv_timeout(SRS_PAUSED_RECV_TIMEOUT_US);
            rtmp->set_send_timeout(SRS_PAUSED_SEND_TIMEOUT_US);
            
            srs_trace("control message(close) accept, retry stream service.");
            continue;
        }
        
        // for other system control message, fatal error.
        srs_error("control message(%d) reject as error. ret=%d", ret, ret);
        return ret;
    }
}

int SrsRtmpConn::stream_service_cycle()
{
    int ret = ERROR_SUCCESS;
        
    SrsRtmpConnType type;
    if ((ret = rtmp->identify_client(res->stream_id, type, req->stream, req->duration)) != ERROR_SUCCESS) {
        if (!srs_is_client_gracefully_close(ret)) {
            srs_error("identify client failed. ret=%d", ret);
        }
        return ret;
    }
    req->strip();
    srs_trace("client identified, type=%s, stream_name=%s, duration=%.2f", 
        srs_client_type_string(type).c_str(), req->stream.c_str(), req->duration);
    
    // security check
    if ((ret = security->check(type, ip, req)) != ERROR_SUCCESS) {
        srs_error("security check failed. ret=%d", ret);
        return ret;
    }
    srs_info("security check ok");

    // client is identified, set the timeout to service timeout.
    rtmp->set_recv_timeout(SRS_CONSTS_RTMP_RECV_TIMEOUT_US);
    rtmp->set_send_timeout(SRS_CONSTS_RTMP_SEND_TIMEOUT_US);
    
    // set chunk size to larger.
    int chunk_size = _srs_config->get_chunk_size(req->vhost);
    if ((ret = rtmp->set_chunk_size(chunk_size)) != ERROR_SUCCESS) {
        srs_error("set chunk_size=%d failed. ret=%d", chunk_size, ret);
        return ret;
    }
    srs_info("set chunk_size=%d success", chunk_size);
    
    bool vhost_is_edge = _srs_config->get_vhost_is_edge(req->vhost);
    
    // find a source to serve.
    SrsSource* source = SrsSource::fetch(req);
    if (!source) {
        if ((ret = SrsSource::create(req, server, server, &source)) != ERROR_SUCCESS) {
            return ret;
        }
    }
    srs_assert(source != NULL);
    
    // update the statistic when source disconveried.
    SrsStatistic* stat = SrsStatistic::instance();
    if ((ret = stat->on_client(_srs_context->get_id(), req)) != ERROR_SUCCESS) {
        srs_error("stat client failed. ret=%d", ret);
        return ret;
    }

    // check ASAP, to fail it faster if invalid.
    if (type != SrsRtmpConnPlay && !vhost_is_edge) {
        // check publish available
        // for edge, never check it, for edge use proxy mode.
        if (!source->can_publish()) {
            ret = ERROR_SYSTEM_STREAM_BUSY;
            srs_warn("stream %s is already publishing. ret=%d", 
                req->get_stream_url().c_str(), ret);
            // to delay request
            st_usleep(SRS_STREAM_BUSY_SLEEP_US);
            return ret;
        }
    }
    
    bool enabled_cache = _srs_config->get_gop_cache(req->vhost);
    srs_trace("source url=%s, ip=%s, cache=%d, is_edge=%d, source_id=%d[%d]",
        req->get_stream_url().c_str(), ip.c_str(), enabled_cache, vhost_is_edge, 
        source->source_id(), source->source_id());
    source->set_cache(enabled_cache);
    
    switch (type) {
        case SrsRtmpConnPlay: {
            srs_verbose("start to play stream %s.", req->stream.c_str());
            
            if (vhost_is_edge) {
                // notice edge to start for the first client.
                if ((ret = source->on_edge_start_play()) != ERROR_SUCCESS) {
                    srs_error("notice edge start play stream failed. ret=%d", ret);
                    return ret;
                }
            }
            
            // response connection start play
            if ((ret = rtmp->start_play(res->stream_id)) != ERROR_SUCCESS) {
                srs_error("start to play stream failed. ret=%d", ret);
                return ret;
            }
            if ((ret = http_hooks_on_play()) != ERROR_SUCCESS) {
                srs_error("http hook on_play failed. ret=%d", ret);
                return ret;
            }
            
            srs_info("start to play stream %s success", req->stream.c_str());
            ret = playing(source);
            http_hooks_on_stop();
            
            return ret;
        }
        case SrsRtmpConnFMLEPublish: {
            srs_verbose("FMLE start to publish stream %s.", req->stream.c_str());
            
            if (vhost_is_edge) {
                if ((ret = source->on_edge_start_publish()) != ERROR_SUCCESS) {
                    srs_error("notice edge start publish stream failed. ret=%d", ret);
                    return ret;
                }
            }
            
            if ((ret = rtmp->start_fmle_publish(res->stream_id)) != ERROR_SUCCESS) {
                srs_error("start to publish stream failed. ret=%d", ret);
                return ret;
            }
            
            if (!vhost_is_edge) {
                if ((ret = source->acquire_publish()) != ERROR_SUCCESS) {
                    return ret;
                }
            }
            
            ret = fmle_publishing(source);
            
            if (!vhost_is_edge) {
                source->release_publish();
            }
            
            return ret;
        }
        case SrsRtmpConnFlashPublish: {
            srs_verbose("flash start to publish stream %s.", req->stream.c_str());
            
            if (vhost_is_edge) {
                if ((ret = source->on_edge_start_publish()) != ERROR_SUCCESS) {
                    srs_error("notice edge start publish stream failed. ret=%d", ret);
                    return ret;
                }
            }
            
            if ((ret = rtmp->start_flash_publish(res->stream_id)) != ERROR_SUCCESS) {
                srs_error("flash start to publish stream failed. ret=%d", ret);
                return ret;
            }
            
            if (!vhost_is_edge) {
                if ((ret = source->acquire_publish()) != ERROR_SUCCESS) {
                    return ret;
                }
            }
            
            ret = flash_publishing(source);
            
            if (!vhost_is_edge) {
                source->release_publish();
            }
            
            return ret;
        }
        default: {
            ret = ERROR_SYSTEM_CLIENT_INVALID;
            srs_info("invalid client type=%d. ret=%d", type, ret);
            return ret;
        }
    }

    return ret;
}

int SrsRtmpConn::check_vhost()
{
    int ret = ERROR_SUCCESS;
    
    srs_assert(req != NULL);
    
    SrsConfDirective* vhost = _srs_config->get_vhost(req->vhost);
    if (vhost == NULL) {
        ret = ERROR_RTMP_VHOST_NOT_FOUND;
        srs_error("vhost %s not found. ret=%d", req->vhost.c_str(), ret);
        return ret;
    }
    
    if (!_srs_config->get_vhost_enabled(req->vhost)) {
        ret = ERROR_RTMP_VHOST_NOT_FOUND;
        srs_error("vhost %s disabled. ret=%d", req->vhost.c_str(), ret);
        return ret;
    }
    
    if (req->vhost != vhost->arg0()) {
        srs_trace("vhost change from %s to %s", req->vhost.c_str(), vhost->arg0().c_str());
        req->vhost = vhost->arg0();
    }
    
    if ((ret = refer->check(req->pageUrl, _srs_config->get_refer(req->vhost))) != ERROR_SUCCESS) {
        srs_error("check refer failed. ret=%d", ret);
        return ret;
    }
    srs_verbose("check refer success.");
    
    if ((ret = http_hooks_on_connect()) != ERROR_SUCCESS) {
        return ret;
    }
    
    return ret;
}

int SrsRtmpConn::playing(SrsSource* source)
{
    int ret = ERROR_SUCCESS;
    
    // create consumer of souce.
    SrsConsumer* consumer = NULL;
    if ((ret = source->create_consumer(consumer)) != ERROR_SUCCESS) {
        srs_error("create consumer failed. ret=%d", ret);
        return ret;
    }
    SrsAutoFree(SrsConsumer, consumer);
    srs_verbose("consumer created success.");
    
    // use isolate thread to recv, 
    // @see: https://github.com/simple-rtmp-server/srs/issues/217
    SrsQueueRecvThread trd(consumer, rtmp, SRS_PERF_MW_SLEEP);
    
    // start isolate recv thread.
    if ((ret = trd.start()) != ERROR_SUCCESS) {
        srs_error("start isolate recv thread failed. ret=%d", ret);
        return ret;
    }
    
    // delivery messages for clients playing stream.
    ret = do_playing(source, consumer, &trd);
    
    // stop isolate recv thread
    trd.stop();
    
    // warn for the message is dropped.
    if (!trd.empty()) {
        srs_warn("drop the received %d messages", trd.size());
    }
    
    return ret;
}

int SrsRtmpConn::do_playing(SrsSource* source, SrsConsumer* consumer, SrsQueueRecvThread* trd)
{
    int ret = ERROR_SUCCESS;
    
    srs_assert(consumer != NULL);
    
    if ((ret = refer->check(req->pageUrl, _srs_config->get_refer_play(req->vhost))) != ERROR_SUCCESS) {
        srs_error("check play_refer failed. ret=%d", ret);
        return ret;
    }
    srs_verbose("check play_refer success.");
    
    // initialize other components
    SrsPithyPrint* pprint = SrsPithyPrint::create_rtmp_play();
    SrsAutoFree(SrsPithyPrint, pprint);

    SrsMessageArray msgs(SRS_PERF_MW_MSGS);
    bool user_specified_duration_to_stop = (req->duration > 0);
    int64_t starttime = -1;
    
    // setup the realtime.
    realtime = _srs_config->get_realtime_enabled(req->vhost);
    // setup the mw config.
    // when mw_sleep changed, resize the socket send buffer.
    mw_enabled = true;
    change_mw_sleep(_srs_config->get_mw_sleep_ms(req->vhost));
    
    // set the sock options.
    play_set_sock_options();
    
    while (true) {
        // collect elapse for pithy print.
        pprint->elapse();

        // to use isolate thread to recv, can improve about 33% performance.
        // @see: https://github.com/simple-rtmp-server/srs/issues/196
        // @see: https://github.com/simple-rtmp-server/srs/issues/217
        while (!trd->empty()) {
            SrsCommonMessage* msg = trd->pump();
            srs_verbose("pump client message to process.");
            
            if ((ret = process_play_control_msg(consumer, msg)) != ERROR_SUCCESS) {
                if (!srs_is_system_control_error(ret) && !srs_is_client_gracefully_close(ret)) {
                    srs_error("process play control message failed. ret=%d", ret);
                }
                return ret;
            }
        }
        
        // quit when recv thread error.
        if ((ret = trd->error_code()) != ERROR_SUCCESS) {
            if (!srs_is_client_gracefully_close(ret)) {
                srs_error("recv thread failed. ret=%d", ret);
            }
            return ret;
        }
        
#ifdef SRS_PERF_QUEUE_COND_WAIT
        // for send wait time debug
        srs_verbose("send thread now=%"PRId64"us, wait %dms", srs_update_system_time_ms(), mw_sleep);
        
        // wait for message to incoming.
        // @see https://github.com/simple-rtmp-server/srs/issues/251
        // @see https://github.com/simple-rtmp-server/srs/issues/257
        if (realtime) {
            // for realtime, min required msgs is 0, send when got one+ msgs.
            consumer->wait(0, mw_sleep);
        } else {
            // for no-realtime, got some msgs then send.
            consumer->wait(SRS_PERF_MW_MIN_MSGS, mw_sleep);
        }
        
        // for send wait time debug
        srs_verbose("send thread now=%"PRId64"us wakeup", srs_update_system_time_ms());
#endif
        
        // get messages from consumer.
        // each msg in msgs.msgs must be free, for the SrsMessageArray never free them.
        int count = 0;
        if ((ret = consumer->dump_packets(&msgs, count)) != ERROR_SUCCESS) {
            srs_error("get messages from consumer failed. ret=%d", ret);
            return ret;
        }

        // reportable
        if (pprint->can_print()) {
            kbps->sample();
            srs_trace("-> "SRS_CONSTS_LOG_PLAY
                " time=%"PRId64", msgs=%d, okbps=%d,%d,%d, ikbps=%d,%d,%d, mw=%d",
                pprint->age(), count,
                kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m(),
                mw_sleep
            );
        }
        
        // we use wait timeout to get messages,
        // for min latency event no message incoming,
        // so the count maybe zero.
        if (count > 0) {
            srs_verbose("mw wait %dms and got %d msgs %d(%"PRId64"-%"PRId64")ms", 
                mw_sleep, count, 
                (count > 0? msgs.msgs[count - 1]->timestamp - msgs.msgs[0]->timestamp : 0),
                (count > 0? msgs.msgs[0]->timestamp : 0), 
                (count > 0? msgs.msgs[count - 1]->timestamp : 0));
        }
        
        if (count <= 0) {
#ifndef SRS_PERF_QUEUE_COND_WAIT
            srs_info("mw sleep %dms for no msg", mw_sleep);
            st_usleep(mw_sleep * 1000);
#else
            srs_verbose("mw wait %dms and got nothing.", mw_sleep);
#endif
            // ignore when nothing got.
            continue;
        }
        srs_info("got %d msgs, min=%d, mw=%d", count, SRS_PERF_MW_MIN_MSGS, mw_sleep);
        
        // only when user specifies the duration, 
        // we start to collect the durations for each message.
        if (user_specified_duration_to_stop) {
            for (int i = 0; i < count; i++) {
                SrsSharedPtrMessage* msg = msgs.msgs[i];
                
                // foreach msg, collect the duration.
                // @remark: never use msg when sent it, for the protocol sdk will free it.
                if (starttime < 0 || starttime > msg->timestamp) {
                    starttime = msg->timestamp;
                }
                duration += msg->timestamp - starttime;
                starttime = msg->timestamp;
            }
        }
        
        // sendout messages, all messages are freed by send_and_free_messages().
        // no need to assert msg, for the rtmp will assert it.
        if (count > 0 && (ret = rtmp->send_and_free_messages(msgs.msgs, count, res->stream_id)) != ERROR_SUCCESS) {
            if (!srs_is_client_gracefully_close(ret)) {
                srs_error("send messages to client failed. ret=%d", ret);
            }
            return ret;
        }
        
        // if duration specified, and exceed it, stop play live.
        // @see: https://github.com/simple-rtmp-server/srs/issues/45
        if (user_specified_duration_to_stop) {
            if (duration >= (int64_t)req->duration) {
                ret = ERROR_RTMP_DURATION_EXCEED;
                srs_trace("stop live for duration exceed. ret=%d", ret);
                return ret;
            }
        }
    }
    
    return ret;
}

int SrsRtmpConn::fmle_publishing(SrsSource* source)
{
    int ret = ERROR_SUCCESS;
    
    bool vhost_is_edge = _srs_config->get_vhost_is_edge(req->vhost);
            
    if ((ret = http_hooks_on_publish()) != ERROR_SUCCESS) {
        srs_error("http hook on_publish failed. ret=%d", ret);
        return ret;
    }

    // use isolate thread to recv,
    // @see: https://github.com/simple-rtmp-server/srs/issues/237
    SrsPublishRecvThread trd(rtmp, req, 
        st_netfd_fileno(stfd), 0, this, source, true, vhost_is_edge);

    srs_info("start to publish stream %s success", req->stream.c_str());
    ret = do_publishing(source, &trd);

    // stop isolate recv thread
    trd.stop();

    // when edge, notice edge to change state.
    // when origin, notice all service to unpublish.
    if (vhost_is_edge) {
        source->on_edge_proxy_unpublish();
    } else {
        source->on_unpublish();
    }

    http_hooks_on_unpublish();
    
    return ret;
}

int SrsRtmpConn::flash_publishing(SrsSource* source)
{
    int ret = ERROR_SUCCESS;

    bool vhost_is_edge = _srs_config->get_vhost_is_edge(req->vhost);

    if ((ret = http_hooks_on_publish()) != ERROR_SUCCESS) {
        srs_error("http hook on_publish failed. ret=%d", ret);
        return ret;
    }

    // use isolate thread to recv,
    // @see: https://github.com/simple-rtmp-server/srs/issues/237
    SrsPublishRecvThread trd(rtmp, req, 
        st_netfd_fileno(stfd), 0, this, source, true, vhost_is_edge);

    srs_info("start to publish stream %s success", req->stream.c_str());
    ret = do_publishing(source, &trd);

    // stop isolate recv thread
    trd.stop();

    // when edge, notice edge to change state.
    // when origin, notice all service to unpublish.
    if (vhost_is_edge) {
        source->on_edge_proxy_unpublish();
    } else {
        source->on_unpublish();
    }

    http_hooks_on_unpublish();

    return ret;
}

int SrsRtmpConn::do_publishing(SrsSource* source, SrsPublishRecvThread* trd)
{
    int ret = ERROR_SUCCESS;

    if ((ret = refer->check(req->pageUrl, _srs_config->get_refer_publish(req->vhost))) != ERROR_SUCCESS) {
        srs_error("check publish_refer failed. ret=%d", ret);
        return ret;
    }
    srs_verbose("check publish_refer success.");
    
    SrsPithyPrint* pprint = SrsPithyPrint::create_rtmp_publish();
    SrsAutoFree(SrsPithyPrint, pprint);

    bool vhost_is_edge = _srs_config->get_vhost_is_edge(req->vhost);

    // when edge, ignore the publish event, directly proxy it.
    if (!vhost_is_edge) {
        // notify the hls to prepare when publish start.
        if ((ret = source->on_publish()) != ERROR_SUCCESS) {
            srs_error("hls on_publish failed. ret=%d", ret);
            return ret;
        }
        srs_verbose("hls on_publish success.");
    }

    // start isolate recv thread.
    if ((ret = trd->start()) != ERROR_SUCCESS) {
        srs_error("start isolate recv thread failed. ret=%d", ret);
        return ret;
    }

    int64_t nb_msgs = 0;
    while (true) {
        pprint->elapse();

        // cond wait for error.
        trd->wait(SRS_CONSTS_RTMP_RECV_TIMEOUT_US / 1000);

        // check the thread error code.
        if ((ret = trd->error_code()) != ERROR_SUCCESS) {
            if (!srs_is_client_gracefully_close(ret)) {
                srs_error("recv thread failed. ret=%d", ret);
            }
            return ret;
        }

        // when not got any messages, timeout.
        if (trd->nb_msgs() <= nb_msgs) {
            ret = ERROR_SOCKET_TIMEOUT;
            srs_warn("publish timeout %"PRId64"us, nb_msgs=%"PRId64", ret=%d",
                     SRS_CONSTS_RTMP_RECV_TIMEOUT_US, nb_msgs, ret);
            break;
        }
        nb_msgs = trd->nb_msgs();

        // reportable
        if (pprint->can_print()) {
            kbps->sample();
            bool mr = _srs_config->get_mr_enabled(req->vhost);
            int mr_sleep = _srs_config->get_mr_sleep_ms(req->vhost);
            srs_trace("<- "SRS_CONSTS_LOG_CLIENT_PUBLISH
                " time=%"PRId64", okbps=%d,%d,%d, ikbps=%d,%d,%d, mr=%d/%d", pprint->age(),
                kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m(),
                mr, mr_sleep
            );
        }
    }

    return ret;
}

int SrsRtmpConn::handle_publish_message(SrsSource* source, SrsCommonMessage* msg, bool is_fmle, bool vhost_is_edge)
{
    int ret = ERROR_SUCCESS;
    
    // process publish event.
    if (msg->header.is_amf0_command() || msg->header.is_amf3_command()) {
        SrsPacket* pkt = NULL;
        if ((ret = rtmp->decode_message(msg, &pkt)) != ERROR_SUCCESS) {
            srs_error("fmle decode unpublish message failed. ret=%d", ret);
            return ret;
        }

        SrsAutoFree(SrsPacket, pkt);

        // for flash, any packet is republish.
        if (!is_fmle) {
            // flash unpublish.
            // TODO: maybe need to support republish.
            srs_trace("flash flash publish finished.");
            return ERROR_CONTROL_REPUBLISH;
        }

        // for fmle, drop others except the fmle start packet.
        if (dynamic_cast<SrsFMLEStartPacket*>(pkt)) {
            SrsFMLEStartPacket* unpublish = dynamic_cast<SrsFMLEStartPacket*>(pkt);
            if ((ret = rtmp->fmle_unpublish(res->stream_id, unpublish->transaction_id)) != ERROR_SUCCESS) {
                return ret;
            }
            return ERROR_CONTROL_REPUBLISH;
        }

        srs_trace("fmle ignore AMF0/AMF3 command message.");
        return ret;
    }

    // video, audio, data message
    if ((ret = process_publish_message(source, msg, vhost_is_edge)) != ERROR_SUCCESS) {
        srs_error("fmle process publish message failed. ret=%d", ret);
        return ret;
    }
    
    return ret;
}

int SrsRtmpConn::process_publish_message(SrsSource* source, SrsCommonMessage* msg, bool vhost_is_edge)
{
    int ret = ERROR_SUCCESS;
    
    // for edge, directly proxy message to origin.
    if (vhost_is_edge) {
        if ((ret = source->on_edge_proxy_publish(msg)) != ERROR_SUCCESS) {
            srs_error("edge publish proxy msg failed. ret=%d", ret);
            return ret;
        }
        return ret;
    }
    
    // process audio packet
    if (msg->header.is_audio()) {
        if ((ret = source->on_audio(msg)) != ERROR_SUCCESS) {
            srs_error("source process audio message failed. ret=%d", ret);
            return ret;
        }
        return ret;
    }
    // process video packet
    if (msg->header.is_video()) {
        if ((ret = source->on_video(msg)) != ERROR_SUCCESS) {
            srs_error("source process video message failed. ret=%d", ret);
            return ret;
        }
        return ret;
    }
    
    // process aggregate packet
    if (msg->header.is_aggregate()) {
        if ((ret = source->on_aggregate(msg)) != ERROR_SUCCESS) {
            srs_error("source process aggregate message failed. ret=%d", ret);
            return ret;
        }
        return ret;
    }
    
    // process onMetaData
    if (msg->header.is_amf0_data() || msg->header.is_amf3_data()) {
        SrsPacket* pkt = NULL;
        if ((ret = rtmp->decode_message(msg, &pkt)) != ERROR_SUCCESS) {
            srs_error("decode onMetaData message failed. ret=%d", ret);
            return ret;
        }
        SrsAutoFree(SrsPacket, pkt);
    
        if (dynamic_cast<SrsOnMetaDataPacket*>(pkt)) {
            SrsOnMetaDataPacket* metadata = dynamic_cast<SrsOnMetaDataPacket*>(pkt);
            if ((ret = source->on_meta_data(msg, metadata)) != ERROR_SUCCESS) {
                srs_error("source process onMetaData message failed. ret=%d", ret);
                return ret;
            }
            srs_info("process onMetaData message success.");
            return ret;
        }
        
        srs_info("ignore AMF0/AMF3 data message.");
        return ret;
    }
    
    return ret;
}

int SrsRtmpConn::process_play_control_msg(SrsConsumer* consumer, SrsCommonMessage* msg)
{
    int ret = ERROR_SUCCESS;
    
    if (!msg) {
        srs_verbose("ignore all empty message.");
        return ret;
    }
    SrsAutoFree(SrsCommonMessage, msg);
    
    if (!msg->header.is_amf0_command() && !msg->header.is_amf3_command()) {
        srs_info("ignore all message except amf0/amf3 command.");
        return ret;
    }
    
    SrsPacket* pkt = NULL;
    if ((ret = rtmp->decode_message(msg, &pkt)) != ERROR_SUCCESS) {
        srs_error("decode the amf0/amf3 command packet failed. ret=%d", ret);
        return ret;
    }
    srs_info("decode the amf0/amf3 command packet success.");
    
    SrsAutoFree(SrsPacket, pkt);
    
    // for jwplayer/flowplayer, which send close as pause message.
    // @see https://github.com/simple-rtmp-server/srs/issues/6
    SrsCloseStreamPacket* close = dynamic_cast<SrsCloseStreamPacket*>(pkt);
    if (close) {
        ret = ERROR_CONTROL_RTMP_CLOSE;
        srs_trace("system control message: rtmp close stream. ret=%d", ret);
        return ret;
    }
    
    // call msg,
    // support response null first,
    // @see https://github.com/simple-rtmp-server/srs/issues/106
    // TODO: FIXME: response in right way, or forward in edge mode.
    SrsCallPacket* call = dynamic_cast<SrsCallPacket*>(pkt);
    if (call) {
        // only response it when transaction id not zero,
        // for the zero means donot need response.
        if (call->transaction_id > 0) {
            SrsCallResPacket* res = new SrsCallResPacket(call->transaction_id);
            res->command_object = SrsAmf0Any::null();
            res->response = SrsAmf0Any::null();
            if ((ret = rtmp->send_and_free_packet(res, 0)) != ERROR_SUCCESS) {
                srs_warn("response call failed. ret=%d", ret);
                return ret;
            }
        }
        return ret;
    }
    
    // pause
    SrsPausePacket* pause = dynamic_cast<SrsPausePacket*>(pkt);
    if (pause) {
        if ((ret = rtmp->on_play_client_pause(res->stream_id, pause->is_pause)) != ERROR_SUCCESS) {
            srs_error("rtmp process play client pause failed. ret=%d", ret);
            return ret;
        }

        if ((ret = consumer->on_play_client_pause(pause->is_pause)) != ERROR_SUCCESS) {
            srs_error("consumer process play client pause failed. ret=%d", ret);
            return ret;
        }
        srs_info("process pause success, is_pause=%d, time=%d.", pause->is_pause, pause->time_ms);
        return ret;
    }
    
    // other msg.
    srs_info("ignore all amf0/amf3 command except pause and video control.");
    return ret;
}

void SrsRtmpConn::change_mw_sleep(int sleep_ms)
{
    if (!mw_enabled) {
        return;
    }
    
    // get the sock buffer size.
    int fd = st_netfd_fileno(stfd);
    int onb_sbuf = 0;
    socklen_t sock_buf_size = sizeof(int);
    getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &onb_sbuf, &sock_buf_size);
    
#ifdef SRS_PERF_MW_SO_SNDBUF
    // the bytes:
    //      4KB=4096, 8KB=8192, 16KB=16384, 32KB=32768, 64KB=65536,
    //      128KB=131072, 256KB=262144, 512KB=524288
    // the buffer should set to sleep*kbps/8,
    // for example, your system delivery stream in 1000kbps,
    // sleep 800ms for small bytes, the buffer should set to:
    //      800*1000/8=100000B(about 128KB).
    // other examples:
    //      2000*3000/8=750000B(about 732KB).
    //      2000*5000/8=1250000B(about 1220KB).
    int kbps = 5000;
    int socket_buffer_size = sleep_ms * kbps / 8;

    // socket send buffer, system will double it.
    int nb_sbuf = socket_buffer_size / 2;
    
    // override the send buffer by macro.
    #ifdef SRS_PERF_SO_SNDBUF_SIZE
    nb_sbuf = SRS_PERF_SO_SNDBUF_SIZE / 2;
    #endif
    
    // set the socket send buffer when required larger buffer
    if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &nb_sbuf, sock_buf_size) < 0) {
        srs_warn("set sock SO_SENDBUF=%d failed.", nb_sbuf);
    }
    getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &nb_sbuf, &sock_buf_size);
    
    srs_trace("mw changed sleep %d=>%d, max_msgs=%d, esbuf=%d, sbuf %d=>%d, realtime=%d", 
        mw_sleep, sleep_ms, SRS_PERF_MW_MSGS, socket_buffer_size,
        onb_sbuf, nb_sbuf, realtime);
#else
    srs_trace("mw changed sleep %d=>%d, max_msgs=%d, sbuf %d, realtime=%d", 
        mw_sleep, sleep_ms, SRS_PERF_MW_MSGS, onb_sbuf, realtime);
#endif
        
    mw_sleep = sleep_ms;
}

void SrsRtmpConn::play_set_sock_options()
{
#ifdef SRS_PERF_TCP_NODELAY
    if (true) {
        int fd = st_netfd_fileno(stfd);
    
        socklen_t nb_v = sizeof(int);
        
        int ov = 0;
        getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &ov, &nb_v);
        
        int v = 1;
        // set the socket send buffer when required larger buffer
        if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, nb_v) < 0) {
            srs_warn("set sock TCP_NODELAY=%d failed.", v);
        }
        getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &v, &nb_v);
        
        srs_trace("set TCP_NODELAY %d=>%d", ov, v);
    }
#endif
}

int SrsRtmpConn::check_edge_token_traverse_auth()
{
    int ret = ERROR_SUCCESS;
    
    srs_assert(req);
    
    st_netfd_t stsock = NULL;
    SrsConfDirective* conf = _srs_config->get_vhost_edge_origin(req->vhost);
    for (int i = 0; i < (int)conf->args.size(); i++) {
        if ((ret = connect_server(i, &stsock)) == ERROR_SUCCESS) {
            break;
        }
    }
    if (ret != ERROR_SUCCESS) {
        srs_warn("token traverse connect failed. ret=%d", ret);
        return ret;
    }
    
    srs_assert(stsock);
    SrsStSocket* io = new SrsStSocket(stsock);
    SrsRtmpClient* client = new SrsRtmpClient(io);
    
    ret = do_token_traverse_auth(client);

    srs_freep(client);
    srs_freep(io);
    srs_close_stfd(stsock);

    return ret;
}

int SrsRtmpConn::connect_server(int origin_index, st_netfd_t* pstsock)
{
    int ret = ERROR_SUCCESS;
    
    SrsConfDirective* conf = _srs_config->get_vhost_edge_origin(req->vhost);
    srs_assert(conf);
    
    // select the origin.
    std::string server = conf->args.at(origin_index % conf->args.size());
    origin_index = (origin_index + 1) % conf->args.size();
    
    std::string s_port = SRS_CONSTS_RTMP_DEFAULT_PORT;
    int port = ::atoi(SRS_CONSTS_RTMP_DEFAULT_PORT);
    size_t pos = server.find(":");
    if (pos != std::string::npos) {
        s_port = server.substr(pos + 1);
        server = server.substr(0, pos);
        port = ::atoi(s_port.c_str());
    }
    
    // open socket.
    st_netfd_t stsock = NULL;
    int64_t timeout = SRS_EDGE_TOKEN_TRAVERSE_TIMEOUT_US;
    if ((ret = srs_socket_connect(server, port, timeout, &stsock)) != ERROR_SUCCESS) {
        srs_warn("edge token traverse failed, tcUrl=%s to server=%s, port=%d, timeout=%"PRId64", ret=%d",
            req->tcUrl.c_str(), server.c_str(), port, timeout, ret);
        return ret;
    }
    srs_info("edge token auth connected, url=%s/%s, server=%s:%d", req->tcUrl.c_str(), req->stream.c_str(), server.c_str(), port);
    
    *pstsock = stsock;
    return ret;
}

int SrsRtmpConn::do_token_traverse_auth(SrsRtmpClient* client)
{
    int ret = ERROR_SUCCESS;
    
    srs_assert(client);

    client->set_recv_timeout(SRS_CONSTS_RTMP_RECV_TIMEOUT_US);
    client->set_send_timeout(SRS_CONSTS_RTMP_SEND_TIMEOUT_US);
    
    if ((ret = client->handshake()) != ERROR_SUCCESS) {
        srs_error("handshake with server failed. ret=%d", ret);
        return ret;
    }
    
    // for token tranverse, always take the debug info(which carries token).
    if ((ret = client->connect_app(req->app, req->tcUrl, req, true)) != ERROR_SUCCESS) {
        srs_error("connect with server failed, tcUrl=%s. ret=%d", req->tcUrl.c_str(), ret);
        return ret;
    }
    
    srs_trace("edge token auth ok, tcUrl=%s", req->tcUrl.c_str());
    
    return ret;
}

int SrsRtmpConn::http_hooks_on_connect()
{
    int ret = ERROR_SUCCESS;
    
#ifdef SRS_AUTO_HTTP_CALLBACK
    if (_srs_config->get_vhost_http_hooks_enabled(req->vhost)) {
        // HTTP: on_connect 
        SrsConfDirective* on_connect = _srs_config->get_vhost_on_connect(req->vhost);
        if (!on_connect) {
            srs_info("ignore the empty http callback: on_connect");
            return ret;
        }
        
        for (int i = 0; i < (int)on_connect->args.size(); i++) {
            std::string url = on_connect->args.at(i);
            if ((ret = SrsHttpHooks::on_connect(url, req)) != ERROR_SUCCESS) {
                srs_error("hook client on_connect failed. url=%s, ret=%d", url.c_str(), ret);
                return ret;
            }
        }
    }
#endif

    return ret;
}

void SrsRtmpConn::http_hooks_on_close()
{
#ifdef SRS_AUTO_HTTP_CALLBACK
    if (_srs_config->get_vhost_http_hooks_enabled(req->vhost)) {
        // whatever the ret code, notify the api hooks.
        // HTTP: on_close 
        SrsConfDirective* on_close = _srs_config->get_vhost_on_close(req->vhost);
        if (!on_close) {
            srs_info("ignore the empty http callback: on_close");
            return;
        }
        
        for (int i = 0; i < (int)on_close->args.size(); i++) {
            std::string url = on_close->args.at(i);
            SrsHttpHooks::on_close(url, req, kbps->get_send_bytes(), kbps->get_recv_bytes());
        }
    }
#endif
}

int SrsRtmpConn::http_hooks_on_publish()
{
    int ret = ERROR_SUCCESS;
    
#ifdef SRS_AUTO_HTTP_CALLBACK
    if (_srs_config->get_vhost_http_hooks_enabled(req->vhost)) {
        // HTTP: on_publish 
        SrsConfDirective* on_publish = _srs_config->get_vhost_on_publish(req->vhost);
        if (!on_publish) {
            srs_info("ignore the empty http callback: on_publish");
            return ret;
        }
        
        for (int i = 0; i < (int)on_publish->args.size(); i++) {
            std::string url = on_publish->args.at(i);
            if ((ret = SrsHttpHooks::on_publish(url, req)) != ERROR_SUCCESS) {
                srs_error("hook client on_publish failed. url=%s, ret=%d", url.c_str(), ret);
                return ret;
            }
        }
    }
#endif

    return ret;
}

void SrsRtmpConn::http_hooks_on_unpublish()
{
#ifdef SRS_AUTO_HTTP_CALLBACK
    if (_srs_config->get_vhost_http_hooks_enabled(req->vhost)) {
        // whatever the ret code, notify the api hooks.
        // HTTP: on_unpublish 
        SrsConfDirective* on_unpublish = _srs_config->get_vhost_on_unpublish(req->vhost);
        if (!on_unpublish) {
            srs_info("ignore the empty http callback: on_unpublish");
            return;
        }
        
        for (int i = 0; i < (int)on_unpublish->args.size(); i++) {
            std::string url = on_unpublish->args.at(i);
            SrsHttpHooks::on_unpublish(url, req);
        }
    }
#endif
}

int SrsRtmpConn::http_hooks_on_play()
{
    int ret = ERROR_SUCCESS;
    
#ifdef SRS_AUTO_HTTP_CALLBACK
    if (_srs_config->get_vhost_http_hooks_enabled(req->vhost)) {
        // HTTP: on_play 
        SrsConfDirective* on_play = _srs_config->get_vhost_on_play(req->vhost);
        if (!on_play) {
            srs_info("ignore the empty http callback: on_play");
            return ret;
        }
        
        for (int i = 0; i < (int)on_play->args.size(); i++) {
            std::string url = on_play->args.at(i);
            if ((ret = SrsHttpHooks::on_play(url, req)) != ERROR_SUCCESS) {
                srs_error("hook client on_play failed. url=%s, ret=%d", url.c_str(), ret);
                return ret;
            }
        }
    }
#endif

    return ret;
}

void SrsRtmpConn::http_hooks_on_stop()
{
#ifdef SRS_AUTO_HTTP_CALLBACK
    if (_srs_config->get_vhost_http_hooks_enabled(req->vhost)) {
        // whatever the ret code, notify the api hooks.
        // HTTP: on_stop 
        SrsConfDirective* on_stop = _srs_config->get_vhost_on_stop(req->vhost);
        if (!on_stop) {
            srs_info("ignore the empty http callback: on_stop");
            return;
        }
        
        for (int i = 0; i < (int)on_stop->args.size(); i++) {
            std::string url = on_stop->args.at(i);
            SrsHttpHooks::on_stop(url, req);
        }
    }
#endif

    return;
}