Download a recording

In this code snippet you see how to download a recording.

Example

Replace the following variables in the example code:

Key	Description
`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 file 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 file:

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

View full source

Run your code

We can use the application 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 file 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 file:

/*
 * 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 application 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:

client = Vonage::Client.new(
  application_id: VONAGE_APPLICATION_ID,
  private_key: VONAGE_PRIVATE_KEY
)

response = client.files.save(VOICE_RECORDING_URL, 'recording.mp3')

View full source

Run your code

Save this file to your machine and run it:

ruby download-a-recording.rb

Try it out

You will need a Recording URL from which to download the recording file. You typically get this from the JSON response received on the /webhooks/recordings endpoint when the record action is used when recording a call, connecting another call and so on. A typical JSON response will resemble the following:

{'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 -

When you run the script, the recording located at the recording URL will be downloaded. You can then listen to the recording.

Download a recording

Example

Prerequisites

Write the code

Run your code

Prerequisites

Write the code

Run your code

Prerequisites

Write the code

Run your code

Prerequisites

Write the code

Run your code

Prerequisites

Write the code

Prerequisites

Write the code

Run your code

Prerequisites

Write the code

Run your code

Prerequisites

Write the code

Run your code

Try it out

Further Reading