Actions on Google - Receiving 200, but no notification - push-notification

Question

I am using a webhook and c# to fulfill my logic within an Action.
I have subscribed to two intents, and have captured the "UpdateUserId".
Here is the notification payload
{
"customPushMessage": {
"target": {
"userId": "ABwppHFW6M9ASVqbKFBigM8N0mgssCJmPlwarmgzil_Nk_YsdZ1evzTAggEh0aEsctjOIYg2uHc8n7KfzNuHLuJoirXW",
"intent": "NotificationIntent",
"argument": {
"rawText": "Notification Argument Raw Text",
"textValue": "Notification Argument Text Value",
"name": "Notification Argument"
},
"locale": "en-US"
},
"userNotification": {
"title": "Notification Title",
"text": "Notification Text"
}
}
}
I am sending my notification using the following code blocks
private static async Task<string> GetAccessTokenFromJsonKeyAsync(string jsonKeyFilePath, params string[] scopes)
{
using (var stream = new FileStream(jsonKeyFilePath, FileMode.Open, FileAccess.Read))
{
return await GoogleCredential
.FromStream(stream) // Loads key file
.CreateScoped(scopes) // Gathers scopes requested
.UnderlyingCredential // Gets the credentials
.GetAccessTokenForRequestAsync(); // Gets the Access Token
}
}
public async Task<HttpResponseMessage> SendNotificationMessage(ProactiveMessage proactiveMessage)
{
try
{
var accessToken = await GetAccessTokenFromJsonKeyAsync("key.json", "https://www.googleapis.com/auth/actions.fulfillment.conversation");
var serialized = JsonConvert.SerializeObject(proactiveMessage);
var payload = "{\"customPushMessage\": " + serialized + "}";
// Wrap our JSON inside a StringContent which then can be used by the HttpClient class
var httpContent = new StringContent(payload, Encoding.UTF8, "application/json");
_httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
var httpResponseMessage = await _httpClient.PostAsync($"{_hostUrl}", httpContent);
Console.WriteLine(httpResponseMessage.IsSuccessStatusCode ? "Successfully sent notification message." : $"Failed to send notification message with {httpResponseMessage.StatusCode}.");
return httpResponseMessage;
}
catch (Exception ex)
{
Debug.WriteLine($"Google Assistant Service: Failed to send notification message with exception: {ex.Message}");
return new HttpResponseMessage(HttpStatusCode.BadRequest);
}
}
The method returns a 200 Response. However, a notification never shows up on my phone.
I am not sure what my next steps for debugging are.
Since notifications are stil not public, is this a common issue?

Answer 1

I had the same issue. I received 200 status code but no notifications arrived at the target device.
I tried it again in approximately 2 days and it worked with no problems and have been working ever since.
The only explanation I could come up with is that there is some configuration running in the background.