$request.getAccessToken() returns undefined in Google Conversational Actions

[mig82]

I'm submitting a...

• Bug report
• Feature request
• Documentation issue or request
• Other... Please describe:

Expected Behavior

In Google Conversational Actions...

const { GoogleAssistant } = require('jovo-platform-googleassistantconv')

after the user has successfully gone through the Account Linking Scene and linked their account, and returned to the ON_SIGN_IN handler, calling this.$request.getAccessToken() should return the access token.

Current Behavior

The function GoogleAction.$request.getAccessToken() is defined, yet it never returns the token, despite the account being linked.

console.log(`this.constructor: '${this.constructor.name}'`)
console.log(`typeof this.$request.getAccessToken: '${typeof this.$request.getAccessToken}'`)
console.log(`this.$request.getAccessToken(): '${this.$request.getAccessToken()}'`)

Error log

This is the output of the code above:

this.constructor: 'GoogleAction'
typeof this.$request.getAccessToken: 'function'
this.$request.getAccessToken(): 'undefined'

Your Environment

$ jovo -v

Jovo CLI Version: 3.2.1

Jovo packages of current project:
  jovo-core: 3.3.1
  jovo-db-filedb: 3.3.1
  jovo-framework: 3.3.1
  jovo-platform-alexa: 3.3.1
  jovo-platform-googleassistantconv: 3.3.2
  jovo-plugin-debugger: 3.3.2

[aswetlow]

Hey @mig82

Could you provide the request JSON?

Thanks!

[mig82]

Hi @aswetlow. What request are you referring to? the one coming back from the account linking scene? If so, this is it:

 >>>>> Request - 2021-03-31T18:03:53.170Z 
{
   "handler": {
      "name": "Jovo"
   },
   "intent": {
      "name": "",
      "params": {
         "AccountLinkingSlot": {
            "original": "",
            "resolved": "LINKED"
         }
      },
      "query": ""
   },
   "scene": {
      "name": "AccountLinkingScene_AccountLinking",
      "slotFillingStatus": "FINAL",
      "slots": {
         "AccountLinkingSlot": {
            "mode": "REQUIRED",
            "status": "SLOT_UNSPECIFIED",
            "updated": true,
            "value": "LINKED"
         }
      }
   },
   "session": {
      "id": "ABwppHHlsa*******-_**_**********************************************BWEHFg",
      "params": {
         "_JOVO_SESSION_": {
            "createdAt": "2021-03-31T18:02:46.367Z",
            "reprompts": {
               "NO_INPUT1": "<speak>Would you like to log in?</speak>"
            },
            "new": false
         },
         "AccountLinkingSlot": "LINKED",
         "_JOVO_STATE_": "OfferLogin.AwaitDecision"
      },
      "typeOverrides": [],
      "languageCode": ""
   },
   "user": {
      "locale": "en-US",
      "params": {
         "userId": "de21****-****-****-****-****6b84cf75"
      },
      "accountLinkingStatus": "LINKED",
      "verificationStatus": "VERIFIED",
      "packageEntitlements": [],
      "gaiamint": "",
      "permissions": [],
      "lastSeenTime": "2021-03-31T18:02:46Z"
   },
   "home": {
      "params": {}
   },
   "device": {
      "capabilities": [
         "SPEECH",
         "RICH_RESPONSE",
         "WEB_LINK",
         "LONG_FORM_AUDIO"
      ]
   }
}

[NLueg]

I'm having the same Issue. I tried every getter for the access token without any success.
I managed to get the token with the following code:

export function getAccessToken(jovo: Jovo): string | undefined {
  if (jovo.$request && jovo.isAlexaSkill()) {
    return jovo.$request.getAccessToken();
  }

  // TODO: Temporary hack to receive the access-token
  if (jovo.isGoogleAction()) {
    const headers = jovo.$googleAction.$user.conversationalAction.$host.headers;
    const accessTokenWithBearer = headers['Authorization'] || headers['authorization'];
    return accessTokenWithBearer?.replace("Bearer ", "");
  }

  return undefined;
}

But I think that the problem is inside the ConversationalActionRequest. It seems to be expected, that the access token is inside the user but this is not the case for me too.

[aswetlow]

Oh yeah, I forgot about that one. Access tokens are located in the request headers now. Unfortunately, the ConversationalActionRequest class doesn't have access to the $host object (where we have access to the headers).

It's implemented for Sign In with Google in this.$googleAction.$user.getUserProfile(), but there's no helper method just for the token.

@NLueg provides a great workaround for now. I think we should move the $request.getAccessToken() from the request class to the Jovo class.

[NLueg]

@aswetlow actually my workaround doesn't work if the action is hosted on Lambda and I don't really know why 😢
The headers are undefined when I try to get the access token. It works fine when I use jovo run.

Edit: It's because of the API-Gateway 🤦🏻 The gateway filters the headers so that lambda don't receives the headers.
Managed to modify the API-Gateway with this documentation: https://aws.amazon.com/de/premiumsupport/knowledge-center/custom-headers-api-gateway-lambda/.
I added this mapping template to Integration Requests:

{
  "body" : $input.json('$'),
  "headers": {
    #foreach($param in $input.params().header.keySet())
    "$param": "$util.escapeJavaScript($input.params().header.get($param))" #if($foreach.hasNext),#end
    #end  
  }
}

And this to the mapping template of the Integration Response:

$util.parseJson($input.json('$.body'))

Without it the lambda function won't receive the headers. It seems to be a general issue for the api gateway. If you want I could add this part to the documentation as a PR but I don't know if its relevant.

[aswetlow]

We have a Conversational Action on Lambda (via API Gateway) and the headers are passed correctly.

How did you create the API gateway? From the Lambda configuration page or separately in the API gateway settings?

[NLueg]

@aswetlow well, strange but okay. I created it exactly as described in the documentation as I didn't use the gateway before. But if it is working, then you can ignore it. I don't know what's different in my case.

[aswetlow]

Could you log your headers object? Is just the bearer token missing or do you receive an empty object?

[aswetlow]

I close this issue due to inactivity.