/*
The MIT License (MIT)

Copyright (c) 2013-2015 winlin

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_http_conn.hpp>

#ifdef SRS_AUTO_HTTP_SERVER

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>

#include <sstream>
using namespace std;

#include <srs_kernel_log.hpp>
#include <srs_kernel_error.hpp>
#include <srs_app_st_socket.hpp>
#include <srs_core_autofree.hpp>
#include <srs_app_config.hpp>
#include <srs_kernel_utility.hpp>
#include <srs_kernel_file.hpp>
#include <srs_kernel_flv.hpp>
#include <srs_rtmp_sdk.hpp>
#include <srs_app_source.hpp>
#include <srs_rtmp_msg_array.hpp>
#include <srs_kernel_aac.hpp>
#include <srs_kernel_mp3.hpp>
#include <srs_kernel_ts.hpp>
#include <srs_app_pithy_print.hpp>

SrsVodStream::SrsVodStream(string root_dir)
    : SrsHttpFileServer(root_dir)
{
}

SrsVodStream::~SrsVodStream()
{
}

int SrsVodStream::serve_flv_stream(ISrsHttpResponseWriter* w, SrsHttpMessage* r, string fullpath, int offset)
{
    int ret = ERROR_SUCCESS;
    
    SrsFileReader fs;
    
    // open flv file
    if ((ret = fs.open(fullpath)) != ERROR_SUCCESS) {
        return ret;
    }
    
    if (offset > fs.filesize()) {
        ret = ERROR_HTTP_REMUX_OFFSET_OVERFLOW;
        srs_warn("http flv streaming %s overflow. size=%"PRId64", offset=%d, ret=%d", 
            fullpath.c_str(), fs.filesize(), offset, ret);
        return ret;
    }
    
    SrsFlvVodStreamDecoder ffd;
    
    // open fast decoder
    if ((ret = ffd.initialize(&fs)) != ERROR_SUCCESS) {
        return ret;
    }
    
    // save header, send later.
    char flv_header[13];
    
    // send flv header
    if ((ret = ffd.read_header_ext(flv_header)) != ERROR_SUCCESS) {
        return ret;
    }
    
    // save sequence header, send later
    char* sh_data = NULL;
    int sh_size = 0;
    
    if (true) {
        // send sequence header
        int64_t start = 0;
        if ((ret = ffd.read_sequence_header_summary(&start, &sh_size)) != ERROR_SUCCESS) {
            return ret;
        }
        if (sh_size <= 0) {
            ret = ERROR_HTTP_REMUX_SEQUENCE_HEADER;
            srs_warn("http flv streaming no sequence header. size=%d, ret=%d", sh_size, ret);
            return ret;
        }
    }
    sh_data = new char[sh_size];
    SrsAutoFree(char, sh_data);
    if ((ret = fs.read(sh_data, sh_size, NULL)) != ERROR_SUCCESS) {
        return ret;
    }

    // seek to data offset
    int64_t left = fs.filesize() - offset;

    // write http header for ts.
    w->header()->set_content_length((int)(sizeof(flv_header) + sh_size + left));
    w->header()->set_content_type("video/x-flv");
    
    // write flv header and sequence header.
    if ((ret = w->write(flv_header, sizeof(flv_header))) != ERROR_SUCCESS) {
        return ret;
    }
    if (sh_size > 0 && (ret = w->write(sh_data, sh_size)) != ERROR_SUCCESS) {
        return ret;
    }
    
    // write body.
    if ((ret = ffd.lseek(offset)) != ERROR_SUCCESS) {
        return ret;
    }
    
    // send data
    if ((ret = copy(w, &fs, r, left)) != ERROR_SUCCESS) {
        srs_warn("read flv=%s size=%d failed, ret=%d", fullpath.c_str(), left, ret);
        return ret;
    }
    
    return ret;
}

int SrsVodStream::serve_mp4_stream(ISrsHttpResponseWriter* w, SrsHttpMessage* r, string fullpath, int start, int end)
{
    int ret = ERROR_SUCCESS;

    srs_assert(start >= 0);
    srs_assert(end == -1 || end >= 0);
    
    SrsFileReader fs;
    
    // open flv file
    if ((ret = fs.open(fullpath)) != ERROR_SUCCESS) {
        return ret;
    }

    // parse -1 to whole file.
    if (end == -1) {
        end = fs.filesize();
    }
    
    if (end > fs.filesize() || start > end) {
        ret = ERROR_HTTP_REMUX_OFFSET_OVERFLOW;
        srs_warn("http mp4 streaming %s overflow. size=%"PRId64", offset=%d, ret=%d", 
            fullpath.c_str(), fs.filesize(), start, ret);
        return ret;
    }

    // seek to data offset, [start, end] for range.
    int64_t left = end - start + 1;

    // write http header for ts.
    w->header()->set_content_length(left);
    w->header()->set_content_type("video/mp4");

    // status code 206 to make dash.as happy.
    w->write_header(SRS_CONSTS_HTTP_PartialContent);

    // response the content range header.
    std::stringstream content_range;
    content_range << "bytes " << start << "-" << end << "/" << fs.filesize();
    w->header()->set("Content-Range", content_range.str());
    
    // write body.
    fs.lseek(start);
    
    // send data
    if ((ret = copy(w, &fs, r, left)) != ERROR_SUCCESS) {
        srs_warn("read mp4=%s size=%d failed, ret=%d", fullpath.c_str(), left, ret);
        return ret;
    }
    
    return ret;
}

SrsStreamCache::SrsStreamCache(SrsSource* s, SrsRequest* r)
{
    req = r->copy();
    source = s;
    queue = new SrsMessageQueue(true);
    pthread = new SrsThread("http-stream", this, 0, false);
}

SrsStreamCache::~SrsStreamCache()
{
    pthread->stop();
    srs_freep(pthread);
    
    srs_freep(queue);
    srs_freep(req);
}

int SrsStreamCache::start()
{
    return pthread->start();
}

int SrsStreamCache::dump_cache(SrsConsumer* consumer)
{
    int ret = ERROR_SUCCESS;

    double fast_cache = _srs_config->get_vhost_http_remux_fast_cache(req->vhost);

    if (fast_cache <= 0) {
        srs_info("http: ignore dump fast cache.");
        return ret;
    }
    
    // TODO: FIXME: config it.
    if ((ret = queue->dump_packets(consumer, false, 0, 0, SrsRtmpJitterAlgorithmOFF)) != ERROR_SUCCESS) {
        return ret;
    }
    
    srs_trace("http: dump cache %d msgs, duration=%dms, cache=%.2fs", 
        queue->size(), queue->duration(), fast_cache);
    
    return ret;
}

int SrsStreamCache::cycle()
{
    int ret = ERROR_SUCCESS;
    
    SrsConsumer* consumer = NULL;
    if ((ret = source->create_consumer(consumer, false, false, true)) != ERROR_SUCCESS) {
        srs_error("http: create consumer failed. ret=%d", ret);
        return ret;
    }
    SrsAutoFree(SrsConsumer, consumer);

    SrsPithyPrint* pprint = SrsPithyPrint::create_http_stream_cache();
    SrsAutoFree(SrsPithyPrint, pprint);
    
    SrsMessageArray msgs(SRS_PERF_MW_MSGS);

    // TODO: FIXME: support reload.
    double fast_cache = _srs_config->get_vhost_http_remux_fast_cache(req->vhost);
    if (fast_cache > 0) {
        queue->set_queue_size(fast_cache);
    }
    
    while (true) {
        pprint->elapse();

        // 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("http: get messages from consumer failed. ret=%d", ret);
            return ret;
        }
        
        if (count <= 0) {
            srs_info("http: mw sleep %dms for no msg", mw_sleep);
            // directly use sleep, donot use consumer wait.
            st_usleep(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
            
            // ignore when nothing got.
            continue;
        }

        if (pprint->can_print()) {
            srs_trace("-> "SRS_CONSTS_LOG_HTTP_STREAM_CACHE" http: got %d msgs, age=%d, min=%d, mw=%d", 
                pprint->age(), count, SRS_PERF_MW_MIN_MSGS, SRS_CONSTS_RTMP_PULSE_TIMEOUT_US / 1000);
        }
    
        // free the messages.
        for (int i = 0; i < count; i++) {
            SrsSharedPtrMessage* msg = msgs.msgs[i];
            if (fast_cache > 0) {
                queue->enqueue(msg);
            } else {
                srs_freep(msg);
            }
        }
    }
    
    return ret;
}

ISrsStreamEncoder::ISrsStreamEncoder()
{
}

ISrsStreamEncoder::~ISrsStreamEncoder()
{
}

SrsTsStreamEncoder::SrsTsStreamEncoder()
{
    enc = new SrsTsEncoder();
}

SrsTsStreamEncoder::~SrsTsStreamEncoder()
{
    srs_freep(enc);
}

int SrsTsStreamEncoder::initialize(SrsFileWriter* w, SrsStreamCache* /*c*/)
{
    int ret = ERROR_SUCCESS;
    
    if ((ret = enc->initialize(w)) != ERROR_SUCCESS) {
        return ret;
    }
    
    return ret;
}

int SrsTsStreamEncoder::write_audio(int64_t timestamp, char* data, int size)
{
    return enc->write_audio(timestamp, data, size);
}

int SrsTsStreamEncoder::write_video(int64_t timestamp, char* data, int size)
{
    return enc->write_video(timestamp, data, size);
}

int SrsTsStreamEncoder::write_metadata(int64_t /*timestamp*/, char* /*data*/, int /*size*/)
{
    return ERROR_SUCCESS;
}

bool SrsTsStreamEncoder::has_cache()
{
    // for ts stream, use gop cache of SrsSource is ok.
    return false;
}

int SrsTsStreamEncoder::dump_cache(SrsConsumer* /*consumer*/)
{
    // for ts stream, ignore cache.
    return ERROR_SUCCESS;
}

SrsFlvStreamEncoder::SrsFlvStreamEncoder()
{
    enc = new SrsFlvEncoder();
}

SrsFlvStreamEncoder::~SrsFlvStreamEncoder()
{
    srs_freep(enc);
}

int SrsFlvStreamEncoder::initialize(SrsFileWriter* w, SrsStreamCache* /*c*/)
{
    int ret = ERROR_SUCCESS;
    
    if ((ret = enc->initialize(w)) != ERROR_SUCCESS) {
        return ret;
    }
    
    // write flv header.
    if ((ret = enc->write_header())  != ERROR_SUCCESS) {
        return ret;
    }
    
    return ret;
}

int SrsFlvStreamEncoder::write_audio(int64_t timestamp, char* data, int size)
{
    return enc->write_audio(timestamp, data, size);
}

int SrsFlvStreamEncoder::write_video(int64_t timestamp, char* data, int size)
{
    return enc->write_video(timestamp, data, size);
}

int SrsFlvStreamEncoder::write_metadata(int64_t timestamp, char* data, int size)
{
    return enc->write_metadata(timestamp, data, size);
}

bool SrsFlvStreamEncoder::has_cache()
{
    // for flv stream, use gop cache of SrsSource is ok.
    return false;
}

int SrsFlvStreamEncoder::dump_cache(SrsConsumer* /*consumer*/)
{
    // for flv stream, ignore cache.
    return ERROR_SUCCESS;
}

SrsAacStreamEncoder::SrsAacStreamEncoder()
{
    enc = new SrsAacEncoder();
    cache = NULL;
}

SrsAacStreamEncoder::~SrsAacStreamEncoder()
{
    srs_freep(enc);
}

int SrsAacStreamEncoder::initialize(SrsFileWriter* w, SrsStreamCache* c)
{
    int ret = ERROR_SUCCESS;
    
    cache = c;
    
    if ((ret = enc->initialize(w)) != ERROR_SUCCESS) {
        return ret;
    }
    
    return ret;
}

int SrsAacStreamEncoder::write_audio(int64_t timestamp, char* data, int size)
{
    return enc->write_audio(timestamp, data, size);
}

int SrsAacStreamEncoder::write_video(int64_t /*timestamp*/, char* /*data*/, int /*size*/)
{
    // aac ignore any flv video.
    return ERROR_SUCCESS;
}

int SrsAacStreamEncoder::write_metadata(int64_t /*timestamp*/, char* /*data*/, int /*size*/)
{
    // aac ignore any flv metadata.
    return ERROR_SUCCESS;
}

bool SrsAacStreamEncoder::has_cache()
{
    return true;
}

int SrsAacStreamEncoder::dump_cache(SrsConsumer* consumer)
{
    srs_assert(cache);
    return cache->dump_cache(consumer);
}

SrsMp3StreamEncoder::SrsMp3StreamEncoder()
{
    enc = new SrsMp3Encoder();
    cache = NULL;
}

SrsMp3StreamEncoder::~SrsMp3StreamEncoder()
{
    srs_freep(enc);
}

int SrsMp3StreamEncoder::initialize(SrsFileWriter* w, SrsStreamCache* c)
{
    int ret = ERROR_SUCCESS;
    
    cache = c;
    
    if ((ret = enc->initialize(w)) != ERROR_SUCCESS) {
        return ret;
    }
    
    if ((ret = enc->write_header()) != ERROR_SUCCESS) {
        return ret;
    }
    
    return ret;
}

int SrsMp3StreamEncoder::write_audio(int64_t timestamp, char* data, int size)
{
    return enc->write_audio(timestamp, data, size);
}

int SrsMp3StreamEncoder::write_video(int64_t /*timestamp*/, char* /*data*/, int /*size*/)
{
    // mp3 ignore any flv video.
    return ERROR_SUCCESS;
}

int SrsMp3StreamEncoder::write_metadata(int64_t /*timestamp*/, char* /*data*/, int /*size*/)
{
    // mp3 ignore any flv metadata.
    return ERROR_SUCCESS;
}

bool SrsMp3StreamEncoder::has_cache()
{
    return true;
}

int SrsMp3StreamEncoder::dump_cache(SrsConsumer* consumer)
{
    srs_assert(cache);
    return cache->dump_cache(consumer);
}

SrsStreamWriter::SrsStreamWriter(ISrsHttpResponseWriter* w)
{
    writer = w;
}

SrsStreamWriter::~SrsStreamWriter()
{
}

int SrsStreamWriter::open(std::string /*file*/)
{
    return ERROR_SUCCESS;
}

void SrsStreamWriter::close()
{
}

bool SrsStreamWriter::is_open()
{
    return true;
}

int64_t SrsStreamWriter::tellg()
{
    return 0;
}

int SrsStreamWriter::write(void* buf, size_t count, ssize_t* pnwrite)
{
    if (pnwrite) {
        *pnwrite = count;
    }
    return writer->write((char*)buf, (int)count);
}

SrsLiveStream::SrsLiveStream(SrsSource* s, SrsRequest* r, SrsStreamCache* c)
{
    source = s;
    cache = c;
    req = r->copy();
}

SrsLiveStream::~SrsLiveStream()
{
    srs_freep(req);
}

int SrsLiveStream::serve_http(ISrsHttpResponseWriter* w, SrsHttpMessage* r)
{
    int ret = ERROR_SUCCESS;
    
    ISrsStreamEncoder* enc = NULL;
    
    srs_assert(entry);
    if (srs_string_ends_with(entry->pattern, ".flv")) {
        w->header()->set_content_type("video/x-flv");
        enc = new SrsFlvStreamEncoder();
    } else if (srs_string_ends_with(entry->pattern, ".aac")) {
        w->header()->set_content_type("audio/x-aac");
        enc = new SrsAacStreamEncoder();
    } else if (srs_string_ends_with(entry->pattern, ".mp3")) {
        w->header()->set_content_type("audio/mpeg");
        enc = new SrsMp3StreamEncoder();
    } else if (srs_string_ends_with(entry->pattern, ".ts")) {
        w->header()->set_content_type("video/MP2T");
        enc = new SrsTsStreamEncoder();
    } else {
        ret = ERROR_HTTP_LIVE_STREAM_EXT;
        srs_error("http: unsupported pattern %s", entry->pattern.c_str());
        return ret;
    }
    SrsAutoFree(ISrsStreamEncoder, enc);
    
    // create consumer of souce, ignore gop cache, use the audio gop cache.
    SrsConsumer* consumer = NULL;
    if ((ret = source->create_consumer(consumer, true, true, !enc->has_cache())) != ERROR_SUCCESS) {
        srs_error("http: create consumer failed. ret=%d", ret);
        return ret;
    }
    SrsAutoFree(SrsConsumer, consumer);
    srs_verbose("http: consumer created success.");

    SrsPithyPrint* pprint = SrsPithyPrint::create_http_stream();
    SrsAutoFree(SrsPithyPrint, pprint);
    
    SrsMessageArray msgs(SRS_PERF_MW_MSGS);
    
    // the memory writer.
    SrsStreamWriter writer(w);
    if ((ret = enc->initialize(&writer, cache)) != ERROR_SUCCESS) {
        srs_error("http: initialize stream encoder failed. ret=%d", ret);
        return ret;
    }
    
    // if gop cache enabled for encoder, dump to consumer.
    if (enc->has_cache()) {
        if ((ret = enc->dump_cache(consumer)) != ERROR_SUCCESS) {
            srs_error("http: dump cache to consumer failed. ret=%d", ret);
            return ret;
        }
    }
    
    while (true) {
        pprint->elapse();

        // 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("http: get messages from consumer failed. ret=%d", ret);
            return ret;
        }
        
        if (count <= 0) {
            srs_info("http: mw sleep %dms for no msg", mw_sleep);
            // directly use sleep, donot use consumer wait.
            st_usleep(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
            
            // ignore when nothing got.
            continue;
        }

        if (pprint->can_print()) {
            srs_info("-> "SRS_CONSTS_LOG_HTTP_STREAM" http: got %d msgs, age=%d, min=%d, mw=%d", 
                pprint->age(), count, SRS_PERF_MW_MIN_MSGS, SRS_CONSTS_RTMP_PULSE_TIMEOUT_US / 1000);
        }
        
        // sendout all messages.
        ret = streaming_send_messages(enc, msgs.msgs, count);
    
        // free the messages.
        for (int i = 0; i < count; i++) {
            SrsSharedPtrMessage* msg = msgs.msgs[i];
            srs_freep(msg);
        }
        
        // check send error code.
        if (ret != ERROR_SUCCESS) {
            if (!srs_is_client_gracefully_close(ret)) {
                srs_error("http: send messages to client failed. ret=%d", ret);
            }
            return ret;
        }
    }
    
    return ret;
}

int SrsLiveStream::streaming_send_messages(ISrsStreamEncoder* enc, SrsSharedPtrMessage** msgs, int nb_msgs)
{
    int ret = ERROR_SUCCESS;
    
    for (int i = 0; i < nb_msgs; i++) {
        SrsSharedPtrMessage* msg = msgs[i];
        
        if (msg->is_audio()) {
            ret = enc->write_audio(msg->timestamp, msg->payload, msg->size);
        } else if (msg->is_video()) {
            ret = enc->write_video(msg->timestamp, msg->payload, msg->size);
        } else {
            ret = enc->write_metadata(msg->timestamp, msg->payload, msg->size);
        }
        
        if (ret != ERROR_SUCCESS) {
            return ret;
        }
    }
    
    return ret;
}

SrsLiveEntry::SrsLiveEntry()
{
    stream = NULL;
    cache = NULL;
}

SrsHlsM3u8Stream::SrsHlsM3u8Stream()
{
}

SrsHlsM3u8Stream::~SrsHlsM3u8Stream()
{
}

void SrsHlsM3u8Stream::set_m3u8(std::string v)
{
    m3u8 = v;
}

int SrsHlsM3u8Stream::serve_http(ISrsHttpResponseWriter* w, SrsHttpMessage* r)
{
    int ret = ERROR_SUCCESS;
    
    std::string data = m3u8;
    
    w->header()->set_content_length((int)data.length());
    w->header()->set_content_type("application/x-mpegURL;charset=utf-8");

    if ((ret = w->write((char*)data.data(), (int)data.length())) != ERROR_SUCCESS) {
        if (!srs_is_client_gracefully_close(ret)) {
            srs_error("send m3u8 failed. ret=%d", ret);
        }
        return ret;
    }

    return ret;
}

SrsHlsTsStream::SrsHlsTsStream()
{
}

SrsHlsTsStream::~SrsHlsTsStream()
{
}

void SrsHlsTsStream::set_ts(std::string v)
{
    ts = v;
}

int SrsHlsTsStream::serve_http(ISrsHttpResponseWriter* w, SrsHttpMessage* r)
{
    int ret = ERROR_SUCCESS;
    
    std::string data = ts;
    
    w->header()->set_content_length((int)data.length());
    w->header()->set_content_type("video/MP2T");

    if ((ret = w->write((char*)data.data(), (int)data.length())) != ERROR_SUCCESS) {
        if (!srs_is_client_gracefully_close(ret)) {
            srs_error("send ts failed. ret=%d", ret);
        }
        return ret;
    }

    return ret;
}

SrsHlsEntry::SrsHlsEntry()
{
}

SrsHttpServer::SrsHttpServer()
{
}

SrsHttpServer::~SrsHttpServer()
{
    if (true) {
        std::map<std::string, SrsLiveEntry*>::iterator it;
        for (it = flvs.begin(); it != flvs.end(); ++it) {
            SrsLiveEntry* entry = it->second;
            srs_freep(entry);
        }
        flvs.clear();
    }
    if (true) {
        std::map<std::string, SrsHlsEntry*>::iterator it;
        for (it = hls.begin(); it != hls.end(); ++it) {
            SrsHlsEntry* entry = it->second;
            srs_freep(entry);
        }
        hls.clear();
    }
}

int SrsHttpServer::initialize()
{
    int ret = ERROR_SUCCESS;
    
    // static file
    // flv vod streaming.
    if ((ret = initialize_static_file()) != ERROR_SUCCESS) {
        return ret;
    }
    
    // remux rtmp to flv live streaming
    if ((ret = initialize_flv_streaming()) != ERROR_SUCCESS) {
        return ret;
    }
    
    // remux rtmp to hls live streaming
    if ((ret = initialize_hls_streaming()) != ERROR_SUCCESS) {
        return ret;
    }
    
    return ret;
}

int SrsHttpServer::mount(SrsSource* s, SrsRequest* r)
{
    int ret = ERROR_SUCCESS;
    
    if (flvs.find(r->vhost) == flvs.end()) {
        srs_info("ignore mount flv stream for disabled");
        return ret;
    }
    
    SrsLiveEntry* entry = flvs[r->vhost];
    
    // TODO: FIXME: supports reload.
    if (entry->stream) {
        entry->stream->entry->enabled = true;
        return ret;
    }

    std::string mount = entry->mount;

    // replace the vhost variable
    mount = srs_string_replace(mount, "[vhost]", r->vhost);
    mount = srs_string_replace(mount, "[app]", r->app);
    mount = srs_string_replace(mount, "[stream]", r->stream);

    // remove the default vhost mount
    mount = srs_string_replace(mount, SRS_CONSTS_RTMP_DEFAULT_VHOST"/", "/");
    
    entry->cache = new SrsStreamCache(s, r);
    entry->stream = new SrsLiveStream(s, r, entry->cache);
    
    // start http stream cache thread
    if ((ret = entry->cache->start()) != ERROR_SUCCESS) {
        srs_error("http: start stream cache failed. ret=%d", ret);
        return ret;
    }
    
    // mount the http flv stream.
    if ((ret = mux.handle(mount, entry->stream)) != ERROR_SUCCESS) {
        srs_error("http: mount flv stream for vhost=%s failed. ret=%d", r->vhost.c_str(), ret);
        return ret;
    }
    srs_trace("http: mount flv stream for vhost=%s, mount=%s", r->vhost.c_str(), mount.c_str());
    
    return ret;
}

void SrsHttpServer::unmount(SrsSource* s, SrsRequest* r)
{
    if (flvs.find(r->vhost) == flvs.end()) {
        srs_info("ignore unmount flv stream for disabled");
        return;
    }

    SrsLiveEntry* entry = flvs[r->vhost];
    entry->stream->entry->enabled = false;
}

int SrsHttpServer::mount_hls(SrsRequest* r)
{
    int ret = ERROR_SUCCESS;
    
    if (hls.find(r->vhost) == hls.end()) {
        srs_info("ignore mount hls stream for disabled");
        return ret;
    }
    
    SrsHlsEntry* entry = hls[r->vhost];
    
    // TODO: FIXME: supports reload.
    std::map<std::string, ISrsHttpHandler*>::iterator it;
    for (it = entry->streams.begin(); it != entry->streams.end(); ++it) {
        ISrsHttpHandler* stream = it->second;
        stream->entry->enabled = true;
    }

    return ret;
}

int SrsHttpServer::hls_update_m3u8(SrsRequest* r, string m3u8)
{
    int ret = ERROR_SUCCESS;
    
    // when no hls mounted, ignore.
    if (hls.find(r->vhost) == hls.end()) {
        return ret;
    }
    
    SrsHlsEntry* entry = hls[r->vhost];
    srs_assert(entry);

    std::string mount = entry->mount;

    // replace the vhost variable
    mount = srs_string_replace(mount, "[vhost]", r->vhost);
    mount = srs_string_replace(mount, "[app]", r->app);
    mount = srs_string_replace(mount, "[stream]", r->stream);

    // remove the default vhost mount
    mount = srs_string_replace(mount, SRS_CONSTS_RTMP_DEFAULT_VHOST"/", "/");

    if (entry->streams.find(mount) == entry->streams.end()) {
        ISrsHttpHandler* he = new SrsHlsM3u8Stream();
        entry->streams[mount] = he;

        if ((ret = mux.handle(mount, he)) != ERROR_SUCCESS) {
            srs_error("handle mount=%s failed. ret=%d", mount.c_str(), ret);
            return ret;
        }
    }

    // update the m3u8 stream.
    SrsHlsM3u8Stream* hms = dynamic_cast<SrsHlsM3u8Stream*>(entry->streams[mount]);
    if (hms) {
        hms->set_m3u8(m3u8);
    }
    srs_trace("hls update m3u8 ok, mount=%s", mount.c_str());

    return ret;
}

int SrsHttpServer::hls_update_ts(SrsRequest* r, string uri, string ts)
{
    int ret = ERROR_SUCCESS;
    
    // when no hls mounted, ignore.
    if (hls.find(r->vhost) == hls.end()) {
        return ret;
    }

    SrsHlsEntry* entry = hls[r->vhost];
    srs_assert(entry);

    std::string mount = entry->mount;
    
    // the ts is relative from the m3u8, the same start dir.
    size_t pos = string::npos;
    if ((pos = mount.rfind("/")) != string::npos) {
        mount = mount.substr(0, pos);
    }

    // replace the vhost variable
    mount = srs_string_replace(mount, "[vhost]", r->vhost);
    mount = srs_string_replace(mount, "[app]", r->app);

    // remove the default vhost mount
    mount = srs_string_replace(mount, SRS_CONSTS_RTMP_DEFAULT_VHOST"/", "/");

    // mount with ts.
    mount += "/";
    mount += uri;

    if (entry->streams.find(mount) == entry->streams.end()) {
        ISrsHttpHandler* he = new SrsHlsTsStream();
        entry->streams[mount] = he;

        if ((ret = mux.handle(mount, he)) != ERROR_SUCCESS) {
            srs_error("handle mount=%s failed. ret=%d", mount.c_str(), ret);
            return ret;
        }
    }

    // update the ts stream.
    SrsHlsTsStream* hts = dynamic_cast<SrsHlsTsStream*>(entry->streams[mount]);
    if (hts) {
        hts->set_ts(ts);
    }
    srs_trace("hls update ts ok, mount=%s", mount.c_str());

    return ret;
}

void SrsHttpServer::unmount_hls(SrsRequest* r)
{
    if (hls.find(r->vhost) == hls.end()) {
        srs_info("ignore unmount hls stream for disabled");
        return;
    }

    SrsHlsEntry* entry = hls[r->vhost];

    std::map<std::string, ISrsHttpHandler*>::iterator it;
    for (it = entry->streams.begin(); it != entry->streams.end(); ++it) {
        ISrsHttpHandler* stream = it->second;
        stream->entry->enabled = false;
    }
}

int SrsHttpServer::on_reload_vhost_http_updated()
{
    int ret = ERROR_SUCCESS;
    // TODO: FIXME: implements it.
    return ret;
}

int SrsHttpServer::on_reload_vhost_http_remux_updated()
{
    int ret = ERROR_SUCCESS;
    // TODO: FIXME: implements it.
    return ret;
}

int SrsHttpServer::on_reload_vhost_hls(string vhost)
{
    int ret = ERROR_SUCCESS;
    // TODO: FIXME: implements it.
    return ret;
}

int SrsHttpServer::initialize_static_file()
{
    int ret = ERROR_SUCCESS;
    
    bool default_root_exists = false;
    
    // http static file and flv vod stream mount for each vhost.
    SrsConfDirective* root = _srs_config->get_root();
    for (int i = 0; i < (int)root->directives.size(); i++) {
        SrsConfDirective* conf = root->at(i);
        
        if (!conf->is_vhost()) {
            continue;
        }
        
        std::string vhost = conf->arg0();
        if (!_srs_config->get_vhost_http_enabled(vhost)) {
            continue;
        }
        
        std::string mount = _srs_config->get_vhost_http_mount(vhost);
        std::string dir = _srs_config->get_vhost_http_dir(vhost);

        // replace the vhost variable
        mount = srs_string_replace(mount, "[vhost]", vhost);

        // remove the default vhost mount
        mount = srs_string_replace(mount, SRS_CONSTS_RTMP_DEFAULT_VHOST"/", "/");
        
        // the dir mount must always ends with "/"
        if (mount != "/" && mount.rfind("/") != mount.length() - 1) {
            mount += "/";
        }
        
        // mount the http of vhost.
        if ((ret = mux.handle(mount, new SrsVodStream(dir))) != ERROR_SUCCESS) {
            srs_error("http: mount dir=%s for vhost=%s failed. ret=%d", dir.c_str(), vhost.c_str(), ret);
            return ret;
        }
        
        if (mount == "/") {
            default_root_exists = true;
            srs_warn("http: root mount to %s", dir.c_str());
        }
        srs_trace("http: vhost=%s mount to %s", vhost.c_str(), mount.c_str());
    }
    
    if (!default_root_exists) {
        // add root
        std::string dir = _srs_config->get_http_stream_dir();
        if ((ret = mux.handle("/", new SrsVodStream(dir))) != ERROR_SUCCESS) {
            srs_error("http: mount root dir=%s failed. ret=%d", dir.c_str(), ret);
            return ret;
        }
        srs_trace("http: root mount to %s", dir.c_str());
    }
    
    return ret;
}

int SrsHttpServer::initialize_flv_streaming()
{
    int ret = ERROR_SUCCESS;
    
    // http flv live stream mount for each vhost.
    SrsConfDirective* root = _srs_config->get_root();
    for (int i = 0; i < (int)root->directives.size(); i++) {
        SrsConfDirective* conf = root->at(i);
        
        if (!conf->is_vhost()) {
            continue;
        }
        
        std::string vhost = conf->arg0();
        if (!_srs_config->get_vhost_http_remux_enabled(vhost)) {
            continue;
        }
        
        SrsLiveEntry* entry = new SrsLiveEntry();
        entry->vhost = vhost;
        entry->mount = _srs_config->get_vhost_http_remux_mount(vhost);
        flvs[vhost] = entry;
        srs_trace("http flv live stream, vhost=%s, mount=%s", 
            vhost.c_str(), entry->mount.c_str());
    }
    
    return ret;
}

int SrsHttpServer::initialize_hls_streaming()
{
    int ret = ERROR_SUCCESS;
    
    // http hls live stream mount for each vhost.
    SrsConfDirective* root = _srs_config->get_root();
    for (int i = 0; i < (int)root->directives.size(); i++) {
        SrsConfDirective* conf = root->at(i);
        
        if (!conf->is_vhost()) {
            continue;
        }
        
        std::string vhost = conf->arg0();
        if (!_srs_config->get_hls_enabled(vhost)) {
            continue;
        }

        std::string storage = _srs_config->get_hls_storage(vhost);
        if (storage != "ram" && storage != "both") {
            continue;
        }
        
        SrsHlsEntry* entry = new SrsHlsEntry();
        entry->vhost = vhost;
        entry->mount = _srs_config->get_hls_mount(vhost);
        hls[vhost] = entry;
        srs_trace("http hls live stream, vhost=%s, mount=%s", 
            vhost.c_str(), entry->mount.c_str());
    }
    
    return ret;
}

SrsHttpConn::SrsHttpConn(SrsServer* svr, st_netfd_t fd, SrsHttpServer* m) 
    : SrsConnection(svr, fd)
{
    parser = new SrsHttpParser();
    mux = m;
}

SrsHttpConn::~SrsHttpConn()
{
    srs_freep(parser);
}

void SrsHttpConn::kbps_resample()
{
    // TODO: FIXME: implements it
}

int64_t SrsHttpConn::get_send_bytes_delta()
{
    // TODO: FIXME: implements it
    return 0;
}

int64_t SrsHttpConn::get_recv_bytes_delta()
{
    // TODO: FIXME: implements it
    return 0;
}

int SrsHttpConn::do_cycle()
{
    int ret = ERROR_SUCCESS;
    
    srs_trace("HTTP client ip=%s", ip.c_str());
    
    // initialize parser
    if ((ret = parser->initialize(HTTP_REQUEST)) != ERROR_SUCCESS) {
        srs_error("http initialize http parser failed. ret=%d", ret);
        return ret;
    }
    
    // underlayer socket
    SrsStSocket skt(stfd);
    
    // process http messages.
    for (;;) {
        SrsHttpMessage* req = NULL;
        
        // get a http message
        if ((ret = parser->parse_message(&skt, &req)) != ERROR_SUCCESS) {
            return ret;
        }

        // if SUCCESS, always NOT-NULL.
        srs_assert(req);
        
        // always free it in this scope.
        SrsAutoFree(SrsHttpMessage, req);
        
        // TODO: FIXME: use the post body.
        std::string res;
        
        // get response body.
        if ((ret = req->body_read_all(res)) != ERROR_SUCCESS) {
            return ret;
        }
        
        // ok, handle http request.
        SrsHttpResponseWriter writer(&skt);
        if ((ret = process_request(&writer, req)) != ERROR_SUCCESS) {
            return ret;
        }
    }
        
    return ret;
}

int SrsHttpConn::process_request(ISrsHttpResponseWriter* w, SrsHttpMessage* r) 
{
    int ret = ERROR_SUCCESS;
    
    srs_trace("HTTP %s %s, content-length=%"PRId64"", 
        r->method_str().c_str(), r->url().c_str(), r->content_length());
    
    // use default server mux to serve http request.
    if ((ret = mux->mux.serve_http(w, r)) != ERROR_SUCCESS) {
        if (!srs_is_client_gracefully_close(ret)) {
            srs_error("serve http msg failed. ret=%d", ret);
        }
        return ret;
    }
    
    return ret;
}

#endif