Access Token Response in HTML instead JSON

API and Webhooks Authentication
1

We are experiencing a strange behavior while refreshing Access token in the OAuth API calls

Here is the workflow

  1. Send API call to create meeting using POST /users/{userId}/meetings

  2. If access token is expired, we get status code as 401.

  3. Send post call to refresh access token as described in this article https://marketplace.zoom.us/docs/guides/auth/oauth/#refreshing-an-access-token

  4. We receive status code of 200 and response in HTML format instead of JSON.

We require JSON response 100% of the time. This issue is not happening when we are getting the first access token after using the Publishing URL https://marketplace.zoom.us/docs/guides/auth/oauth/#getting-an-access-token. This occurs only when refreshing the access token after receiving status 401. We are using the exact same header in both scenarios.

Here is the header:

'Content-type'  => 'application/json',
 'Accept'                => 'application/json, application/xml'
'Authorization' => 'Basic Client_ID:Client_Secret'

Any insights will be helpful.

Thanks

Update:
HTTP request of refreshing access token below

Blob headerValue = Blob.valueOf('Client_ID:Client_Secret');
String authorizationHeader = 'Basic ' + EncodingUtil.base64Encode(headerValue);

String endpointBuild = 'https://zoom.us/oauth/token?refresh_token=' + refreshToken  + '&grant_type=refresh_token';

HttpRequest request = new HttpRequest();
request.setMethod('POST');
request.setEndpoint(endpointBuild);
request.setHeader('Content-type', 'application/json');
request.setHeader('Accept', 'application/json, application/xml);
request.setHeader('Authorization', 'Basic  ' + authorizationHeader);

HttpResponse httpResponse = new Http().send(request);
2

@zoom.dev1, Hope you will be fine. You are using which request package to call Zoom REST API e.g axios, HTTPClient etc.

3

We are using Salesforce HTTP class. Solution is built solely on Salesforce

5

Yes absolutely. It is as below

request.setHeader('Content-type', 'application/json');
request.setHeader('Accept', 'application/json, application/xml);
request.setHeader('Authorization', 'Basic' + Client_ID:Client_Secret);

These headers are working correctly when we use them for initial access token. It only occurs when we are refreshing the access token

6

How you are refreshing token by passing in query parameteres?

7

@zoom.dev1, Are you encoding client_id:client_secret base64 string.

As here is the NodeJS sample

const refresh_token=async (refresh_token)=>
{
    var data = qs.stringify({
        refresh_token: refresh_token,
        grant_type: 'refresh_token',
        redirect_uri: process.env.ZOOM_OAUTH_REDIRECT_URI
    });

    var config = {
        method: 'post',
        url: 'https://zoom.us/oauth/token',
        headers: {
            "Content-Type": "application/x-www-form-urlencoded",
            "Authorization": "Basic " + Buffer.from(`${process.env.ZOOM_CLIENT_ID}:${process.env.ZOOM_CLIENT_SECRET}`).toString('base64')
        },
        data: data
    };

    var result = await axios(config)
        .then(function (response) {
            return response;
        })
        .catch(function (error) {
            return error;
        });

    return result;
}
8

I am using Server to server oauth app, i have a php code by using guzzlehttp client i am able to get the access code but i am geeting a error html and also this error

300
Unsupported Content Type

when i user this end point https://api.zoom.us/v2/users/me/meetings
the body is like this
{
“topic”: “Testing-02”,
“type”: “2”,
“start_time”: “2023-01-06”,
“duration”: “60”,
“timezone”: “Asia/kolkata”,
“password”: “123”,
“agenda”: “Testing for zoom meeting”,
"settings: {
‘host_video’: “true”,
‘join_before_host’: “true”,
‘mute_upon_entry’: “true”,
‘participant_video’: “true”,
‘breakout_room’: {
‘enable’ : “true”
}
}
}

9

@freelancer.nak

I have updated my post above as well with this code

Blob headerValue = Blob.valueOf('Client_ID:Client_Secret');
String authorizationHeader = 'Basic ' + EncodingUtil.base64Encode(headerValue);

String endpointBuild = 'https://zoom.us/oauth/token?refresh_token=' + refreshToken  + '&grant_type=refresh_token';

HttpRequest request = new HttpRequest();
request.setMethod('POST');
request.setEndpoint(endpointBuild);
request.setHeader('Content-type', 'application/json');
request.setHeader('Accept', 'application/json, application/xml);
request.setHeader('Authorization', 'Basic  ' + authorizationHeader);

HttpResponse httpResponse = new Http().send(request);

We are receiving the refreshed Access Token; however, that response is coming in as HTML format instead of JSON format
Thank you for the replies

11

Please use this header → "Content-type": "application/x-www-form-urlencoded"