305 lines
10 KiB
C++
305 lines
10 KiB
C++
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/*
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* Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
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*
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* Use of this source code is governed by MIT-like license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#include "Network/TcpClient.h"
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#include "Common/config.h"
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#include "Common/Parser.h"
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#include "WebRtcClient.h"
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using namespace std;
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using namespace toolkit;
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namespace mediakit {
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// # WebRTCUrl format
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// ## whep/whip over http sfu: webrtc://server_host:server_port/{{app}}/{{streamid}}
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// ## whep/whip over https sfu: webrtcs://server_host:server_port/{{app}}/{{streamid}}
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// ## websocket p2p: webrtc://{{signaling_server_host}}:{{signaling_server_port}}/{{app}}/{{streamid}}?room_id={{peer_room_id}}
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// ## websockets p2p: webrtcs://{{signaling_server_host}}:{{signaling_server_port}}/{{app}}/{{streamid}}?room_id={{peer_room_id}}
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void WebRTCUrl::parse(const string &strUrl, bool isPlayer) {
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DebugL << "url: " << strUrl;
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_full_url = strUrl;
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auto url = strUrl;
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auto pos = url.find("?");
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if (pos != string::npos) {
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_params = url.substr(pos + 1);
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url.erase(pos);
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}
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auto schema_pos = url.find("://");
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if (schema_pos != string::npos) {
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auto schema = url.substr(0, schema_pos);
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_is_ssl = strcasecmp(schema.data(), "webrtcs") == 0;
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} else {
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schema_pos = -3;
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}
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// set default port
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_port = _is_ssl ? 443 : 80;
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auto split_vec = split(url.substr(schema_pos + 3), "/");
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if (split_vec.size() > 0) {
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splitUrl(split_vec[0], _host, _port);
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_vhost = _host;
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if (_vhost == "localhost" || isIP(_vhost.data())) {
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// 如果访问的是localhost或ip，那么则为默认虚拟主机
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_vhost = DEFAULT_VHOST;
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}
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}
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if (split_vec.size() > 1) {
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_app = split_vec[1];
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}
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if (split_vec.size() > 2) {
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string stream_id;
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for (size_t i = 2; i < split_vec.size(); ++i) {
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stream_id.append(split_vec[i] + "/");
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}
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if (stream_id.back() == '/') {
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stream_id.pop_back();
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}
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_stream = stream_id;
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}
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// for vhost
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auto kv = Parser::parseArgs(_params);
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auto it = kv.find(VHOST_KEY);
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if (it != kv.end()) {
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_vhost = it->second;
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}
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GET_CONFIG(bool, enableVhost, General::kEnableVhost);
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if (!enableVhost || _vhost.empty()) {
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// 如果关闭虚拟主机或者虚拟主机为空，则设置虚拟主机为默认
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_vhost = DEFAULT_VHOST;
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}
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// for peer_room_id
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it = kv.find("peer_room_id");
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if (it != kv.end()) {
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_peer_room_id = it->second;
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}
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it = kv.find("signaling_protocols");
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if (it != kv.end()) {
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_signaling_protocols = (WebRtcTransport::SignalingProtocols)(stoi(it->second));
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}
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auto suffix = _host + ":" + to_string(_port);
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suffix += (isPlayer ? "/index/api/whep" : "/index/api/whip");
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suffix += "?app=" + _app + "&stream=" + _stream;
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if (!_params.empty()) {
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suffix += "&" + _params;
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}
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if (_is_ssl) {
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_negotiate_url = StrPrinter << "https://" << suffix << endl;
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} else {
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_negotiate_url = StrPrinter << "http://" << suffix << endl;
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}
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}
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//////////// WebRtcClient //////////////////////////
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WebRtcClient::WebRtcClient(toolkit::EventPoller::Ptr poller) {
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DebugL;
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_poller = poller ? std::move(poller) : EventPollerPool::Instance().getPoller();
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}
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WebRtcClient::~WebRtcClient() {
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doBye();
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DebugL;
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}
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void WebRtcClient::startConnect() {
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DebugL;
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doNegotiate();
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}
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void WebRtcClient::connectivityCheck() {
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DebugL;
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return _transport->connectivityCheckForSFU();
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}
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void WebRtcClient::onNegotiateFinish() {
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DebugL;
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_is_negotiate_finished = true;
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if (WebRtcTransport::SignalingProtocols::WEBSOCKET == _url._signaling_protocols) {
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// P2P模式需要gathering candidates
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gatheringCandidate(_peer->getIceServer());
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} else if (WebRtcTransport::SignalingProtocols::WHEP_WHIP == _url._signaling_protocols) {
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// SFU模式不会存在IP不通的情况， answer中就携带了candidates, 直接进行connectivityCheck
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connectivityCheck();
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}
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}
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void WebRtcClient::doNegotiate() {
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DebugL;
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switch (_url._signaling_protocols) {
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case WebRtcTransport::SignalingProtocols::WHEP_WHIP: return doNegotiateWhepOrWhip();
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case WebRtcTransport::SignalingProtocols::WEBSOCKET: return doNegotiateWebsocket();
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default: throw std::invalid_argument(StrPrinter << "not support signaling_protocols: " << (int)_url._signaling_protocols);
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}
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}
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void WebRtcClient::doNegotiateWhepOrWhip() {
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DebugL << _url._negotiate_url;
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weak_ptr<WebRtcClient> weak_self = static_pointer_cast<WebRtcClient>(shared_from_this());
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auto offer_sdp = _transport->createOfferSdp();
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DebugL << "send offer:\n" << offer_sdp;
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_negotiate = make_shared<HttpRequester>();
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_negotiate->setMethod("POST");
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_negotiate->addHeader("Content-Type", "application/sdp");
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_negotiate->setBody(std::move(offer_sdp));
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_negotiate->startRequester(_url._negotiate_url, [weak_self](const toolkit::SockException &ex, const Parser &response) {
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auto strong_self = weak_self.lock();
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if (!strong_self) {
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return;
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}
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if (ex) {
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WarnL << "network err:" << ex;
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strong_self->onResult(ex);
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return;
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}
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DebugL << "status:" << response.status() << "\r\n"
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<< "Location:\r\n"
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<< response.getHeader()["Location"] << "\r\nrecv answer:\n"
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<< response.content();
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strong_self->_url._delete_url = response.getHeader()["Location"];
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if ("201" != response.status()) {
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strong_self->onResult(SockException(Err_other, response.content()));
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return;
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}
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strong_self->_transport->setAnswerSdp(response.content());
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strong_self->onNegotiateFinish();
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}, getTimeOutSec());
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}
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void WebRtcClient::doNegotiateWebsocket() {
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DebugL;
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#if 0
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//TODO: 当前暂将每一路呼叫都使用一个独立的peer_connection,不复用
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_peer = getWebrtcRoomKeeper(_url._host, _url._port);
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if (_peer) {
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checkIn();
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return;
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}
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#endif
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// 未注册的,先增加注册流程，并在此次播放结束后注销
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InfoL << (StrPrinter << "register to signaling server " << _url._host << "::" << _url._port << " first");
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auto room_id = "ringing_" + makeRandStr(16);
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_peer = make_shared<WebRtcSignalingPeer>(_url._host, _url._port, _url._is_ssl, room_id);
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weak_ptr<WebRtcClient> weak_self = static_pointer_cast<WebRtcClient>(shared_from_this());
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_peer->setOnConnect([weak_self](const SockException &ex) {
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if (auto strong_self = weak_self.lock()) {
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if (ex) {
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strong_self->onResult(ex);
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return;
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}
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auto cb = [weak_self](const SockException &ex, const string &key) {
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if (auto strong_self = weak_self.lock()) {
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strong_self->checkIn();
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}
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};
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strong_self->_peer->regist(cb);
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}
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});
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_peer->connect();
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}
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void WebRtcClient::checkIn() {
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DebugL;
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weak_ptr<WebRtcClient> weak_self = static_pointer_cast<WebRtcClient>(shared_from_this());
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auto tuple = MediaTuple(_url._vhost, _url._app, _url._stream, _url._params);
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_peer->checkIn(_url._peer_room_id, tuple, _transport->getIdentifier(), _transport->createOfferSdp(), isPlayer(),
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[weak_self](const SockException &ex, const std::string &answer) {
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auto strong_self = weak_self.lock();
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if (!strong_self) {
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return;
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}
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if (ex) {
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WarnL << "network err:" << ex;
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strong_self->onResult(ex);
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return;
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}
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strong_self->_transport->setAnswerSdp(answer);
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strong_self->onNegotiateFinish();
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}, getTimeOutSec());
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}
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void WebRtcClient::checkOut() {
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DebugL;
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auto tuple = MediaTuple(_url._vhost, _url._app, _url._stream);
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if (_peer) {
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_peer->checkOut(_url._peer_room_id);
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_peer->unregist([](const SockException &ex) {});
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}
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}
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void WebRtcClient::candidate(const std::string &candidate, const std::string &ufrag, const std::string &pwd) {
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_peer->candidate(_transport->getIdentifier(), candidate, ufrag, pwd);
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}
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void WebRtcClient::gatheringCandidate(IceServerInfo::Ptr ice_server) {
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DebugL;
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std::weak_ptr<WebRtcClient> weak_self = std::static_pointer_cast<WebRtcClient>(shared_from_this());
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_transport->gatheringCandidate(ice_server, [weak_self](const std::string& transport_identifier, const std::string& candidate,
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const std::string& ufrag, const std::string& pwd) {
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auto strong_self = weak_self.lock();
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if (!strong_self) {
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return;
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}
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strong_self->candidate(candidate, ufrag, pwd);
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});
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}
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void WebRtcClient::doBye() {
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DebugL;
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if (!_is_negotiate_finished) {
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return;
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}
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switch (_url._signaling_protocols) {
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case WebRtcTransport::SignalingProtocols::WHEP_WHIP: return doByeWhepOrWhip();
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case WebRtcTransport::SignalingProtocols::WEBSOCKET: return checkOut();
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default: throw std::invalid_argument(StrPrinter << "not support signaling_protocols: " << (int)_url._signaling_protocols);
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}
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_is_negotiate_finished = false;
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}
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void WebRtcClient::doByeWhepOrWhip() {
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DebugL;
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if (!_negotiate) {
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return;
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}
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_negotiate->setMethod("DELETE");
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_negotiate->setBody("");
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_negotiate->startRequester(_url._delete_url, [](const toolkit::SockException &ex, const Parser &response) {
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if (ex) {
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WarnL << "network err:" << ex;
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return;
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}
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DebugL << "status:" << response.status();
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}, getTimeOutSec());
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}
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float WebRtcClient::getTimeOutSec() {
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GET_CONFIG(uint32_t, timeout, Rtc::kTimeOutSec);
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if (timeout <= 0) {
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WarnL << "config rtc. " << Rtc::kTimeOutSec << ": " << timeout << " not vaild";
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return 5.0;
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}
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return (float)timeout;
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}
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} /* namespace mediakit */
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