I have upgraded my C# DialogFlow client from Google.Cloud.DialogFlow.V2 to Google.Apis.DialogFlow.v2
However I keep getting a 401 error when connecting to DialogFlow.
Heres is my code:
Environment.SetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS", cloudKeyFile);
var response = new
Google.Apis.Dialogflow.v2.DialogflowService().Projects.Agent.Sessions.DetectIntent(
new Google.Apis.Dialogflow.v2.Data.GoogleCloudDialogflowV2DetectIntentRequest
{
QueryInput = new Google.Apis.Dialogflow.v2.Data.GoogleCloudDialogflowV2QueryInput
{
Text = new Google.Apis.Dialogflow.v2.Data.GoogleCloudDialogflowV2TextInput
{
Text = queryText,
LanguageCode = languageCode
}
}
},
$"projects/{ProjectId}/agent/sessions/{sessionId}")
.Execute();
Error:
Google.Apis.Requests.RequestError
Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project. [401]
NOTE: cloudKeyFile is a valid auth2 key file that worked with the previous framework. (Google.Cloud.DialogFlow.V2)
Can someone guide me on what to do?
Thnx in advance
Ok found a solution by programmatically adding creds to the request like this:
var creds = GoogleCredential.FromFile(cloudKeyFile);
var scopedCreds = creds.CreateScoped(DialogflowService.Scope.CloudPlatform);
var response = new DialogflowService(new BaseClientService.Initializer
{
HttpClientInitializer = scopedCreds,
ApplicationName = ProjectId
}).Projects.Agent.Sessions.DetectIntent(
new GoogleCloudDialogflowV2DetectIntentRequest
{
QueryInput = new GoogleCloudDialogflowV2QueryInput
{
Text = new GoogleCloudDialogflowV2TextInput
{
Text = queryText,
LanguageCode = languageCode
}
}
},
$"projects/{ProjectId}/agent/sessions/{sessionId}")
.Execute();
NOTE - remember to add relevant Scope flags!
Example that brought clarity:
https://developers.google.com/api-client-library/dotnet/guide/batch
Following on from Godsayer's answer I managed to get this working with a few lines of code when using a c# webclient.
First, make sure you have created a Google Service Account and granted it the relevant permissions to DialogFlow. I needed to get at Intents, Utterances etc so granted it DialogFlow API Admin.
Then, within the service account I created a new Json Key and downloaded it, storing it in a local dir in my app.
In visual studio I then installed the Google.Apis.Dialogflow.v2 nuget package.
In my console app I added the following code lines and I'm in!
using Google.Apis.Auth.OAuth2;
using Google.Apis.Dialogflow.v2;
var credentials = GoogleCredential.FromFile(@"C:\pathtofile\abc123.json");
var scopedCredentials = credentials.CreateScoped(DialogflowService.Scope.CloudPlatform);
_oAuthToken = scopedCredentials.UnderlyingCredential.GetAccessTokenForRequestAsync().Result;
WebClient webclient = new WebClient();
webclient.Headers.Add(HttpRequestHeader.ContentType, "application/json");
webclient.Headers.Add(HttpRequestHeader.Authorization, $"Bearer {_oAuthToken}");
Dialogflow's API authentication changes substantially from v1 to v2. Instead of using client and developer access tokens you need to use OAuth2 or OAuth2 service account with the proper scopes (https://www.googleapis.com/auth/cloud-platform
) and roles (Dialogflow API Admin
, Dialogflow API Client
, or Dialogflow API Reader
)
Sources:
- https://dialogflow.com/docs/reference/v2-auth-setup
- https://cloud.google.com/dialogflow-enterprise/docs/detect-intent-text#detect-intent-text-csharp
Other answers were useful to me but didn't work, maybe because the API changed. This is what worked for me:
var dialogFlowConfigurationBytes = BlobManager.GetBytesByBlobUrl("your json path"); // get bytes from file using BlobManager class (utility class created by me, you could get the stream directly)
var credentials = GoogleCredential.FromStream(new MemoryStream(dialogFlowConfigurationBytes));
Channel channel = new Channel(IntentsClient.DefaultEndpoint.Host, IntentsClient.DefaultEndpoint.Port, credentials.ToChannelCredentials());
var client = SessionsClient.Create(channel);
foreach (var text in texts)
{
var response = client.DetectIntent(
session: new SessionName(dialogFlowConfiguration.ProjectId, sessionId),
queryInput: new QueryInput()
{
Text = new TextInput()
{
Text = text,
LanguageCode = languageCode
}
}
);
}