Two Way Streaming in Typescript¶

Описание¶

Приложение Two Way Streaming in Typescript показывает пример использования Web SDK в React приложении на языке Typescript для публикации и проигрывания WebRTC потока

Проект доступен на GitHub, а также в архивах сборок Web SDK по следующему пути examples/typescript/two-way-streaming-ts, начиная со сборки 2.0.203.

Сборка проекта¶

Загрузите исходные тексты WebSDK

git clone https://github.com/flashphoner/flashphoner_client.git

Перейдите в каталог примера

cd flashphoner_client/examples/typescript/two-way-streaming-ts

Установите зависимости
```
npm install
```
Запустите сборку для локального тестирования
```
npm start
```

или для выгрузки на свой веб-сервер

npm run build

Работа с кодом примера¶

Для разбора исходного кода примера возьмем версию с хэшем d9abaca, которая доступна здесь

Код приложения расположен в файле TwoWayStreamingApp.tsx, дополнительные функции в файле fp-utils.ts

1. Импорт API¶

code

import * as FPUtils from './fp-utils';
import * as Flashphoner from '@flashphoner/websdk';

2. Инициализация API¶

Flashphoner.init() code

componentDidMount() {
 try {
   Flashphoner.init({});
   ...
 }
 catch(e) {
   console.log(e);
   ...
 }
}

3. Подключение к серверу и получение события, подтверждающего установку соединения¶

Flashphoner.createSession(), SESSION_STATUS.ESTABLISHED code

onConnectClick = () => {
 let app = this;
 let url = this.state.serverUrl;
 let session = this.state.session;

 if (!session) {
   console.log("Create new session with url " + url);
   app.setState({connectButtonDisabled: true, serverUrlDisabled: true});
   Flashphoner.createSession({urlServer: url}).on(SESSION_STATUS.ESTABLISHED, (session) => {
     app.setState({sessionStatus: SESSION_STATUS.ESTABLISHED, sessionStatusClass: 'text-success'});
     app.onConnected(session);
   }).on(SESSION_STATUS.DISCONNECTED, () => {
     ...
   }).on(SESSION_STATUS.FAILED, () => {
     ...
   });
 }
 ...
}

4. Публикация потока¶

Session.createStream(), Stream.publish() code

publishStream = () => {
 let app = this;
 let session = this.state.session;
 let streamName = this.state.publishStreamName;
 let localVideo = this.state.localVideo;

 if(session && localVideo) {
   session.createStream({
     name: streamName,
     display: localVideo,
     cacheLocalResources: true,
     receiveVideo: false,
     receiveAudio: false
   }).on(STREAM_STATUS.PUBLISHING, (stream) => {
     ...
   }).on(STREAM_STATUS.UNPUBLISHED, () => {
     ...
   }).on(STREAM_STATUS.FAILED, () => {
     ...
   }).publish();
 }
}

5. Получение события, подтверждающего публикацию¶

STREAM_STATUS.PUBLISHING code

publishStream = () => {
 let app = this;
 let session = this.state.session;
 let streamName = this.state.publishStreamName;
 let localVideo = this.state.localVideo;

 if(session && localVideo) {
   session.createStream({
     ...
   }).on(STREAM_STATUS.PUBLISHING, (stream) => {
     app.setState({publishStatus: STREAM_STATUS.PUBLISHING, publishStatusClass: 'text-success'});
     app.onPublishing(stream);
   }).on(STREAM_STATUS.UNPUBLISHED, () => {
     ...
   }).on(STREAM_STATUS.FAILED, () => {
     ...
   }).publish();
 }
}

6. Воспроизведение потока, изменение размера отображаемой картинки¶

Session.createStream(), Stream.play(), STREAM_STATUS.PENDING, FPUtils.resizeVideo() code

playStream = () => {
 let app = this;
 let session = this.state.session;
 let streamName = this.state.playStreamName;
 let remoteVideo = this.state.remoteVideo;

 if(session && remoteVideo) {
   session.createStream({
     name: streamName,
     display: remoteVideo
   }).on(STREAM_STATUS.PENDING, (stream) => {
     let video = document.getElementById(stream.id());
     if (!video.hasListeners) {
         video.hasListeners = true;
         video.addEventListener('resize', (event) => {
             FPUtils.resizeVideo(event.target);
         });
     }
   }).on(STREAM_STATUS.PLAYING, (stream) => {
     ...
   }).on(STREAM_STATUS.STOPPED, () => {
     ...
   }).on(STREAM_STATUS.FAILED, () => {
     ...
   }).play();
 }
}

7. Получение события, подтверждающего воспроизведение¶

STREAM_STATUS.PLAYING code

playStream = () => {
 let app = this;
 let session = this.state.session;
 let streamName = this.state.playStreamName;
 let remoteVideo = this.state.remoteVideo;

 if(session && remoteVideo) {
   session.createStream({
     name: streamName,
     display: remoteVideo
   }).on(STREAM_STATUS.PENDING, (stream) => {
     ...
   }).on(STREAM_STATUS.PLAYING, (stream) => {
     app.setState({playStatus: STREAM_STATUS.PLAYING, playStatusClass: 'text-success'});
     app.onPlaying(stream);
   }).on(STREAM_STATUS.STOPPED, () => {
     ...
   }).on(STREAM_STATUS.FAILED, () => {
     ...
   }).play();
 }
}

8. Остановка воспроизведения¶

Stream.stop() code

onPlayClick = () => {
 let app = this;
 let stream = this.state.playStream;
 ...

 if (!stream) {
   ...
   app.playStream();
 } else {
   app.setState({playButtonDisabled: true});
   stream.stop();
 }
}

9. Получение события, подтверждающего остановку воспроизведения¶

STREAM_STATUS.STOPPED code

playStream = () => {
 let app = this;
 let session = this.state.session;
 let streamName = this.state.playStreamName;
 let remoteVideo = this.state.remoteVideo;

 if(session && remoteVideo) {
   session.createStream({
     name: streamName,
     display: remoteVideo
   }).on(STREAM_STATUS.PENDING, (stream) => {
     ...
   }).on(STREAM_STATUS.PLAYING, (stream) => {
     ...
   }).on(STREAM_STATUS.STOPPED, () => {
     app.setState({playStatus: STREAM_STATUS.STOPPED, playStatusClass: 'text-success'});
     app.onStopped();
   }).on(STREAM_STATUS.FAILED, () => {
     ...
   }).play();
 }
}

10. Остановка публикации¶

Stream.stop() code

onPublishClick = () => {
 let app = this;
 let stream = this.state.publishStream;
 ...
 if (!stream) {
   ...
   app.publishStream();
 } else {
   app.setState({publishButtonDisabled: true});
   stream.stop();
 }
}

11. Получение события, подтверждающего остановку публикации¶

STREAM_STATUS.UNPUBLISHED code

publishStream = () => {
 let app = this;
 let session = this.state.session;
 let streamName = this.state.publishStreamName;
 let localVideo = this.state.localVideo;

 if(session && localVideo) {
   session.createStream({
     ...
   }).on(STREAM_STATUS.PUBLISHING, (stream) => {
     ...
   }).on(STREAM_STATUS.UNPUBLISHED, () => {
     app.setState({publishStatus: STREAM_STATUS.UNPUBLISHED, publishStatusClass: 'text-success'});
     app.onUnpublished();
   }).on(STREAM_STATUS.FAILED, () => {
     ...
   }).publish();
 }
}

12. Закрытие соединения с сервером¶

Session.disconnect() code

onConnectClick = () => {
 let app = this;
 let url = this.state.serverUrl;
 let session = this.state.session;

 if (!session) {
   ...
 } else {
   app.setState({connectButtonDisabled: true});
   session.disconnect();
 }
}

13. Получение события, подтверждающего закрытие соединения¶

SESSION_STATUS.DISCONNECTED code

onConnectClick = () => {
 let app = this;
 let url = this.state.serverUrl;
 let session = this.state.session;

 if (!session) {
   ...
   Flashphoner.createSession({urlServer: url}).on(SESSION_STATUS.ESTABLISHED, (session) => {
     ...
   }).on(SESSION_STATUS.DISCONNECTED, () => {
     app.setState({sessionStatus: SESSION_STATUS.DISCONNECTED, sessionStatusClass: 'text-success'});
     app.onDisconnected();
   }).on(SESSION_STATUS.FAILED, () => {
     ...
   });
   ...
 }
}