TTS timeout connection to server: how to keep alive the connection with javascript?

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TTS timeout connection to server: how to keep alive the connection with javascript?

Dirk Delbaere 1

In Azure cognitive services TTS there is a timeout after +- 2 minutes when not using the speech. There is a WebSocket connection problem: "Unable to contact server. StatusCode: 1006, undefined Reason: undefined"
Is there a way to keep alive the connection with javascript (browser)?

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Answer 1

YutongTie-MSFT 53,971 Moderator

Hello,

Thanks for reaching out to us. How long you want keep the connection alive? How you are dong the authentication?

For access token, the access token should be sent to the service as the Authorization: Bearer <TOKEN> header. Each access token is valid for 10 minutes. You can get a new token at any time, however, to minimize network traffic and latency, we recommend using the same token for nine minutes.

This is an example for HTTP short-audio scenario:

POST /cognitiveservices/v1 HTTP/1.1
Authorization: Bearer YOUR_ACCESS_TOKEN
Host: westus.stt.speech.microsoft.com
Content-type: application/ssml+xml
Content-Length: 199
Connection: Keep-Alive

// Message body here...

Regards,
Yutong

Dirk Delbaere 1 Reputation point

2021-05-07T09:11:31.51+00:00
Thank you for help.
If possible I would use nine minutes.
For access token I use code from the TTS example in Javascript (browser):

var authorizationEndpoint = "token.php"; function RequestAuthorizationToken() { if (authorizationEndpoint) { var a = new XMLHttpRequest(); a.open("GET", authorizationEndpoint); a.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); a.send("");

.....
Can I put "Content-Length: 199 / Connection: Keep-Alive" in this script?
Dirk Delbaere 1 Reputation point

2021-05-07T11:47:02.217+00:00

In token.php I have:
'''curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Ocp-Apim-Subscription-Key: ' . $subscriptionKey));'''
Is this the place to be for "Content-Length: 199 / Connection: Keep-Alive..." ?
YutongTie-MSFT 53,971 Reputation points Moderator

2021-05-13T08:20:26.9+00:00

Hello,

I have found a C#code sample not sure if this helps you a little bit:

Continuous recognition code snippet – https://learn.microsoft.com/en-us/azure/cognitive-services/speech-service/get-started-speech-to-text?tabs=windowsinstall&pivots=programming-language-csharp#continuous-recognition.

You may have to tweak one of the samples to process continuous recognition, as pointed out in L41 of C# sample.

I am sorry we do not have any published .js code.

Regards,
Yutong
Dirk Delbaere 1 Reputation point

2021-05-14T09:48:28.377+00:00

This is for Speech Recognition not Speech Synthesis?
Now I also see that above you gave me the "sample HTTP request to the Speech-to-text REST API for short audio".
I am looking for a solution for TTS Speech Synthesis.
As mentioned, I have a WebSocket connection problem when working with Speech synthesis TTS.
When the webpage with Azure Cognitive Services TTS is not used for a few minutes, the error - timeout occurs.
I made this page based on the javascript example for browser...
So should I put "Content-Length: 199 and Connection: Keep-Alive." in the token.php?

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TTS timeout connection to server: how to keep alive the connection with javascript?

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