録音をダウンロードする

このコード・スニペットでは、録画をダウンロードする方法を説明します。

例

サンプルコードの以下の変数を置き換える：

キー	説明
`VOICE_RECORDING_URL`	The URL of the recording to download. You typically get this from the JSON response received on the `/webhooks/recordings` endpoint when the `record` action is used.

Prerequisites

Execute the following command at your terminal prompt to create the JWT for authentication:

export JWT=$(nexmo jwt:generate $PATH_TO_PRIVATE_KEY application_id=$NEXMO_APPLICATION_ID)

Write the code

Add the following to download-a-recording.sh:

curl $VOICE_RECORDING_URL \
  -H "Authorization: Bearer $JWT" \
  --output recording.mp3

View full source

Run your code

Save this file to your machine and run it:

bash download-a-recording.sh

Prerequisites

npm install @vonage/server-client

Create a file named download-a-recording.js and add the following code:

const { FileClient } = require('@vonage/server-client');

const fileClient = new FileClient({
  applicationId: VONAGE_APPLICATION_ID,
  privateKey: VONAGE_PRIVATE_KEY,
});

View full source

Write the code

Add the following to download-a-recording.js:

fileClient.downloadFile(
  VOICE_RECORDING_URL,
  VOICE_RECORDING_DESTINATION,
)
  .then(() => console.log(`File Downloaded to ${VOICE_RECORDING_DESTINATION}`))
  .catch((error) => console.error(error));

View full source

Run your code

Save this file to your machine and run it:

node download-a-recording.js

Prerequisites

Add the following to build.gradle:

implementation 'com.vonage:server-sdk-kotlin:2.1.1'

Create a class named DownloadRecording and add the following code to the main method:

val client = Vonage {
    applicationId(VONAGE_APPLICATION_ID)
    privateKeyPath(VONAGE_PRIVATE_KEY_PATH)
}

View full source

Write the code

Add the following to the main method of the DownloadRecording class:

val destination = Paths.get("/Users/me123/Downloads")
client.voice.downloadRecording(VOICE_RECORDING_URL, destination)

View full source

Run your code

We can use the アプリケーション plugin for Gradle to simplify the running of our application. Update your build.gradle with the following:

apply plugin: 'application'
mainClassName = project.hasProperty('main') ? project.getProperty('main') : ''

Run the following gradle command to execute your application, replacing com.vonage.quickstart.kt.voice with the package containing DownloadRecording:

gradle run -Pmain=com.vonage.quickstart.kt.voice.DownloadRecording

Prerequisites

Add the following to build.gradle:

implementation 'com.vonage:server-sdk:9.3.1'

Create a class named DownloadRecording and add the following code to the main method:

VonageClient client = VonageClient.builder()
        .applicationId(VONAGE_APPLICATION_ID)
        .privateKeyPath(VONAGE_PRIVATE_KEY_PATH)
        .build();

View full source

Write the code

Add the following to the main method of the DownloadRecording class:

/*
 * A recording webhook endpoint which automatically downloads the specified recording to a file in the
 * current working directory, called "downloaded_recording.mp3"
 */
Route downloadRoute = (req, res) -> {
    EventWebhook event = EventWebhook.fromJson(req.body());
    String recordingUrl = event.getRecordingUrl().toString();
    Path recordingFile = Paths.get("downloaded_recording.mp3");
    System.out.println("Downloading from " + recordingUrl);
    client.getVoiceClient().saveRecording(recordingUrl, recordingFile);
    return "OK";
};

Spark.port(3000);
Spark.post("/recording", downloadRoute);

View full source

Run your code

We can use the アプリケーション plugin for Gradle to simplify the running of our application. Update your build.gradle with the following:

apply plugin: 'application'
mainClassName = project.hasProperty('main') ? project.getProperty('main') : ''

Run the following gradle command to execute your application, replacing com.vonage.quickstart.voice with the package containing DownloadRecording:

gradle run -Pmain=com.vonage.quickstart.voice.DownloadRecording

Prerequisites

Install-Package Vonage

Write the code

Add the following to GetRecording.cs:

var credentials = Credentials.FromAppIdAndPrivateKeyPath(VONAGE_APPLICATION_ID, VONAGE_PRIVATE_KEY_PATH);
var client = new VonageClient(credentials);

var response = await client.VoiceClient.GetRecordingAsync(VOICE_RECORDING_URL);

View full source

Prerequisites

composer require vonage/client

Write the code

Add the following to index.php:

require_once __DIR__ . '/../../vendor/autoload.php';

$keypair = new \Vonage\Client\Credentials\Keypair(file_get_contents(VONAGE_APPLICATION_PRIVATE_KEY_PATH), VONAGE_APPLICATION_ID);
$client = new \Vonage\Client($keypair);

$recordingUrl = 'https://api.nexmo.com/v1/files/'.VONAGE_RECORDING_ID;
$data = $client->voice()->getRecording($recordingUrl);
file_put_contents(VONAGE_RECORDING_ID .'.mp3', $data->getContents());

View full source

Run your code

Save this file to your machine and run it:

php index.php

Prerequisites

pip install vonage python-dotenv

Write the code

Add the following to get-recording.py:

from vonage import Auth, Vonage

client = Vonage(
    Auth(
        application_id=VONAGE_APPLICATION_ID,
        private_key=VONAGE_PRIVATE_KEY,
    )
)

client.voice.download_recording(VOICE_RECORDING_URL, 'recording.mp3')

View full source

Run your code

Save this file to your machine and run it:

python voice/get-recording.py

Prerequisites

gem install vonage

Write the code

Add the following to download-a-recording.rb:

View full source

Run your code

Save this file to your machine and run it:

ruby download-a-recording.rb

試してみる

録画ファイルをダウンロードするには、録画URLが必要です。通常、これは /webhooks/recordings エンドポイント record アクションは通話録音別の呼び出しに接続する、といった具合だ。典型的なJSONレスポンスは以下のようなものである：

{'conversation_uuid': 'CON-ddddaaaa-bbbb-cccc-dddd-0123456789de',
 'end_time': '2018-08-10T11:19:31Z',
 'recording_url': 'https://api.nexmo.com/v1/files/aaaaaaaa-bbbb-cccc-dddd-0123456789ab',
 'recording_uuid': 'ccccaaaa-dddd-cccc-dddd-0123456789ab',
 'size': 162558,
 'start_time': '2018-08-10T11:18:51Z',
 'timestamp': '2018-08-10T11:19:31.744Z'}
1.2.3.4 - - [10/Aug/2018 11:19:31] "POST /webhooks/recordings HTTP/1.1" 200 -

スクリプトを実行すると、録画URLにある録画がダウンロードされます。にある録音がダウンロードされます。その後、録音を聴くことができます。

さらに読む

トランスクリプション - このガイドでは、Amazon Transcribe APIを使って、Vonage Voice APIで録音した電話での会話を書き起こす方法を紹介します。