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Amazon Transcribe Streaming service request in Node.js with Http/2 gives no response

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1

I am trying to use Amazon Transcribe Streaming Service with a http2 request from Node.js, Here is the documentation links that I am following
Streaming request format. According to this document end point is https://transcribe-streaming.<'region'>.amazonaws.com, but making a request to this url gives url not found error.
But in the Java Example found end point as https://transcribestreaming.''.amazonaws.com, so making a request to this url does not give any error or response back. I am trying from us-east-1 region.

Here is the code I am trying with.

const http2 = require('http2');
var aws4 = require('aws4');

var opts = 
 service: 'transcribe', 
 region: 'us-east-1', 
 path: '/stream-transcription', 
 headers:
 'content-type': 'application/json',
 'x-amz-target': 'com.amazonaws.transcribe.Transcribe.StartStreamTranscription'
 


var urlObj = aws4.sign(opts, accessKeyId: '<access key>', secretAccessKey: '<aws secret>');

client.on('error', function(err)
 console.error("error in request ",err);
);

const req = client.request(
 ':method': 'POST',
 ':path': '/stream-transcription',
 'authorization': urlObj.headers.Authorization, 
 'content-type': 'application/json',
 'x-amz-content-sha256': 'STREAMING-AWS4-HMAC-SHA256-EVENTS',
 'x-amz-target': 'com.amazonaws.transcribe.Transcribe.StartStreamTranscription',
 'x-amz-date': urlObj['headers']['X-Amz-Date'],
 'x-amz-transcribe-language-code': 'en-US',
 'x-amz-transcribe-media-encoding': 'pcm',
 'x-amz-transcribe-sample-rate': 44100
);

req.on('response', (headers, flags) => 
 for (const name in headers) 
 console.log(`$name: $headers[name]`);
 
);
let data = '';
req.on('data', (chunk) => data += chunk; );
req.on('end', () => 
 console.log(`n$data`);
 client.close();
);
req.end();

Can anyone point out what I am missing here. I couldn't find any examples implementing this with HTTP/2 either.

Update:
Changing the Content-type to application/json came back with response status 200 but with following exception:

`"Output":"__type":"com.amazon.coral.service#SerializationException","Version":"1.0"`

node.js amazon-web-services aws-transcribe

share|improve this question

edited Mar 13 at 21:36

Manoj

asked Mar 9 at 1:06

ManojManoj

12310

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Were you ever able to get this to work? I am in a similar situation. Thanks!
  
  – stephen lizcano
  Mar 11 at 12:59
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Nope, still stuck on the same issue.
  
  – Manoj
  Mar 11 at 13:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  There is also older documentation for the streaming transcription, which has the correct host but bad content-type :D docs.aws.amazon.com/transcribe/latest/dg/… I am fighting this same API in Go and I was able to get past the initial connection and IAM authentication here stackoverflow.com/questions/53743785/… Not fully working yet though.
  
  – shelll
  Mar 13 at 14:55
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Removing/not setting the content-type should help a bit. In my case setting the correct content-type return HTTP 404. I am stuck after that though.
  
  – shelll
  Mar 13 at 15:40
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yup, setting content-type:application/json returned the response with status 200 but with exception "Output":"__type":"com.amazon.coral.service#SerializationException","Version":"1.0"; but if content-type is not provided it gives a 403.
  
  – Manoj
  Mar 13 at 21:33
  
  

  
  
  
  

 | 
show 3 more comments

1

I am trying to use Amazon Transcribe Streaming Service with a http2 request from Node.js, Here is the documentation links that I am following
Streaming request format. According to this document end point is https://transcribe-streaming.<'region'>.amazonaws.com, but making a request to this url gives url not found error.
But in the Java Example found end point as https://transcribestreaming.''.amazonaws.com, so making a request to this url does not give any error or response back. I am trying from us-east-1 region.

Here is the code I am trying with.

const http2 = require('http2');
var aws4 = require('aws4');

var opts = 
 service: 'transcribe', 
 region: 'us-east-1', 
 path: '/stream-transcription', 
 headers:
 'content-type': 'application/json',
 'x-amz-target': 'com.amazonaws.transcribe.Transcribe.StartStreamTranscription'
 


var urlObj = aws4.sign(opts, accessKeyId: '<access key>', secretAccessKey: '<aws secret>');

client.on('error', function(err)
 console.error("error in request ",err);
);

const req = client.request(
 ':method': 'POST',
 ':path': '/stream-transcription',
 'authorization': urlObj.headers.Authorization, 
 'content-type': 'application/json',
 'x-amz-content-sha256': 'STREAMING-AWS4-HMAC-SHA256-EVENTS',
 'x-amz-target': 'com.amazonaws.transcribe.Transcribe.StartStreamTranscription',
 'x-amz-date': urlObj['headers']['X-Amz-Date'],
 'x-amz-transcribe-language-code': 'en-US',
 'x-amz-transcribe-media-encoding': 'pcm',
 'x-amz-transcribe-sample-rate': 44100
);

req.on('response', (headers, flags) => 
 for (const name in headers) 
 console.log(`$name: $headers[name]`);
 
);
let data = '';
req.on('data', (chunk) => data += chunk; );
req.on('end', () => 
 console.log(`n$data`);
 client.close();
);
req.end();

Can anyone point out what I am missing here. I couldn't find any examples implementing this with HTTP/2 either.

Update:
Changing the Content-type to application/json came back with response status 200 but with following exception:

`"Output":"__type":"com.amazon.coral.service#SerializationException","Version":"1.0"`

node.js amazon-web-services aws-transcribe

share|improve this question

edited Mar 13 at 21:36

Manoj

asked Mar 9 at 1:06

ManojManoj

12310

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Were you ever able to get this to work? I am in a similar situation. Thanks!
  
  – stephen lizcano
  Mar 11 at 12:59
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Nope, still stuck on the same issue.
  
  – Manoj
  Mar 11 at 13:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  There is also older documentation for the streaming transcription, which has the correct host but bad content-type :D docs.aws.amazon.com/transcribe/latest/dg/… I am fighting this same API in Go and I was able to get past the initial connection and IAM authentication here stackoverflow.com/questions/53743785/… Not fully working yet though.
  
  – shelll
  Mar 13 at 14:55
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Removing/not setting the content-type should help a bit. In my case setting the correct content-type return HTTP 404. I am stuck after that though.
  
  – shelll
  Mar 13 at 15:40
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yup, setting content-type:application/json returned the response with status 200 but with exception "Output":"__type":"com.amazon.coral.service#SerializationException","Version":"1.0"; but if content-type is not provided it gives a 403.
  
  – Manoj
  Mar 13 at 21:33
  
  

  
  
  
  

 | 
show 3 more comments

I am trying to use Amazon Transcribe Streaming Service with a http2 request from Node.js, Here is the documentation links that I am following
Streaming request format. According to this document end point is https://transcribe-streaming.<'region'>.amazonaws.com, but making a request to this url gives url not found error.
But in the Java Example found end point as https://transcribestreaming.''.amazonaws.com, so making a request to this url does not give any error or response back. I am trying from us-east-1 region.

Here is the code I am trying with.

const http2 = require('http2');
var aws4 = require('aws4');

var opts = 
 service: 'transcribe', 
 region: 'us-east-1', 
 path: '/stream-transcription', 
 headers:
 'content-type': 'application/json',
 'x-amz-target': 'com.amazonaws.transcribe.Transcribe.StartStreamTranscription'
 


var urlObj = aws4.sign(opts, accessKeyId: '<access key>', secretAccessKey: '<aws secret>');

client.on('error', function(err)
 console.error("error in request ",err);
);

const req = client.request(
 ':method': 'POST',
 ':path': '/stream-transcription',
 'authorization': urlObj.headers.Authorization, 
 'content-type': 'application/json',
 'x-amz-content-sha256': 'STREAMING-AWS4-HMAC-SHA256-EVENTS',
 'x-amz-target': 'com.amazonaws.transcribe.Transcribe.StartStreamTranscription',
 'x-amz-date': urlObj['headers']['X-Amz-Date'],
 'x-amz-transcribe-language-code': 'en-US',
 'x-amz-transcribe-media-encoding': 'pcm',
 'x-amz-transcribe-sample-rate': 44100
);

req.on('response', (headers, flags) => 
 for (const name in headers) 
 console.log(`$name: $headers[name]`);
 
);
let data = '';
req.on('data', (chunk) => data += chunk; );
req.on('end', () => 
 console.log(`n$data`);
 client.close();
);
req.end();

Can anyone point out what I am missing here. I couldn't find any examples implementing this with HTTP/2 either.

Update:
Changing the Content-type to application/json came back with response status 200 but with following exception:

`"Output":"__type":"com.amazon.coral.service#SerializationException","Version":"1.0"`

node.js amazon-web-services aws-transcribe

share|improve this question

edited Mar 13 at 21:36

Manoj

asked Mar 9 at 1:06

ManojManoj

12310

const http2 = require('http2');
var aws4 = require('aws4');

var opts = 
 service: 'transcribe', 
 region: 'us-east-1', 
 path: '/stream-transcription', 
 headers:
 'content-type': 'application/json',
 'x-amz-target': 'com.amazonaws.transcribe.Transcribe.StartStreamTranscription'
 


var urlObj = aws4.sign(opts, accessKeyId: '<access key>', secretAccessKey: '<aws secret>');

client.on('error', function(err)
 console.error("error in request ",err);
);

const req = client.request(
 ':method': 'POST',
 ':path': '/stream-transcription',
 'authorization': urlObj.headers.Authorization, 
 'content-type': 'application/json',
 'x-amz-content-sha256': 'STREAMING-AWS4-HMAC-SHA256-EVENTS',
 'x-amz-target': 'com.amazonaws.transcribe.Transcribe.StartStreamTranscription',
 'x-amz-date': urlObj['headers']['X-Amz-Date'],
 'x-amz-transcribe-language-code': 'en-US',
 'x-amz-transcribe-media-encoding': 'pcm',
 'x-amz-transcribe-sample-rate': 44100
);

req.on('response', (headers, flags) => 
 for (const name in headers) 
 console.log(`$name: $headers[name]`);
 
);
let data = '';
req.on('data', (chunk) => data += chunk; );
req.on('end', () => 
 console.log(`n$data`);
 client.close();
);
req.end();

`"Output":"__type":"com.amazon.coral.service#SerializationException","Version":"1.0"`

share|improve this question

edited Mar 13 at 21:36

Manoj

asked Mar 9 at 1:06

ManojManoj

12310

share|improve this question

edited Mar 13 at 21:36

Manoj

asked Mar 9 at 1:06

ManojManoj

12310

asked Mar 9 at 1:06

ManojManoj

12310

asked Mar 9 at 1:06

ManojManoj

12310