Close Stream

Use the CloseStream message to close the WebSocket stream. This forces the server to immediately process any unprocessed audio data and return the final transcription results.

Purpose

In real-time audio processing, there are scenarios where you may need to force the server to close. Deepgram supports a CloseStream message to handle such situations. This message will send a shutdown command to the server instructing it to finish processing any cached data, send the response to the client, send a summary metadata object, and then terminate the WebSocket connection.

Example Payloads

To send the CloseStream message, you need to send the following JSON message to the server:

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{
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  "type": "CloseStream"
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}

Upon receiving the CloseStream message, the server will process all remaining audio data and return the following:

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{
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    "type": "Metadata",
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    "transaction_key": "deprecated",
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    "request_id": "8c8ebea9-dbec-45fa-a035-e4632cb05b5f",
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    "sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
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    "created": "2024-08-29T22:37:55.202Z",
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    "duration": 0.0,
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    "channels": 0
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}

Language-Specific Implementations

Below are code examples to help you get started using CloseStream.

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const WebSocket = require("ws");
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// Assuming 'headers' is already defined for authorization
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const ws = new WebSocket("wss://api.deepgram.com/v1/listen", { headers });
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ws.on('open', function open() {
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  // Construct CloseStream message
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  const closeStreamMsg = JSON.stringify({ type: "CloseStream" });
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  // Send CloseStream message
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  ws.send(closeStreamMsg);
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});