Fulfillment response for Dialog flow - dialogflow-es

Question

Just started with the DialogFlow building an app. I have hosted a service in Java on cloud (not using the firebase). Basically, I receive the data from the agent and send the response back as Json. For simple query its working as expected. Like if I say "My name is X", the service will respond as "Hello X" and it will be played on the Response. The JSON response is sent as
{speech: "Hello X", type:"0"}
Now, I want to fetch the user location, so I want to ask the user the permission to access the location. I have a separate intent that does not have any training_Phrases. It has an Event actions_intent_PERMISSION.
I am sending the following response
{
"conversationToken": "[\"_actions_on_google_\"]",
"expectUserResponse": true,
"expectedInputs": [
{
"inputPrompt": {
"richInitialPrompt": {
"items": [
{
"simpleResponse": {
"textToSpeech": "PLACEHOLDER_FOR_PERMISSION"
}
}
]
}
},
"possibleIntents": [
{
"intent": "actions.intent.PERMISSION",
"inputValueData": {
"#type": "type.googleapis.com/google.actions.v2.PermissionValueSpec",
"optContext": "To locate you",
"permissions": [
"NAME"
]
}
}
],
"speechBiasingHints": [
"$geo_city",
"$event_category",
"$event_date"
]
}
],
"responseMetadata": {
"status": {},
"queryMatchInfo": {
"queryMatched": true,
"intent": "1ec64dc5-a6f4-44f6-8483-633b8638c729"
}
}
}
But I am getting the response as 400 Bad request. Is there anything that I am doing wrong here or am I missing any thing?

Answer 1

There are three issues.
The first is that the actions_intent_PERMISSION event is sent in response to a permission request. So this should not be the intent that triggers the request.
Second, you're asking for the users name, but not their location. You want either the DEVICE_COARSE_LOCATION or DEVICE_PRECISE_LOCATION.
The third, and much bigger, issue is that the JSON you're sending is the format used by the Action SDK. Since you're using Dialogflow, you'll be using a different response format which is the basic Dialogflow response, plus Actions on Google specific content in the data.google JSON property.
Your response should look something more like this:
{
"data": {
"google": {
"expectUserResponse": true,
"systemIntent": {
"intent": "actions.intent.PERMISSION",
"data": {
"#type": "type.googleapis.com/google.actions.v2.PermissionValueSpec",
"optContext": "To locate you",
"permissions": [
"NAME",
"DEVICE_PRECISE_LOCATION"
]
}
}
}
}
}
Dialogflow also has some other examples of requests and replies that should help for the other parts of your conversation.