Dialogflow Gateway

Dialogflow Gateway, is a service, that is exposing Dialogflow gRPC API, to HTTP-Clients. Technically it is a Server, that you need to run, to make Dialogflow Web Interface (or other Software) able to connect to V2 API, since Dialogflow has removed native HTTP API from V2, replacing it with gRPC, which browsers cannot natively access, because it would require them to use Google Cloud Service Accounts to authenticate their requests, which cannot be used in Web Clients due to security issues

This is a reference implementation made in NodeJS (and Restify), but it's portable to other platforms and Serverless: Firebase, Lambda and Webtask.io and others

Consider this software as experimental, because it is built on top of Google Cloud Crutches, though it was battle-tested by my users

Features

Get information and status of the Agent
Make requests to Dialogflow & Webhook
Format responses in user-friendly JSON (with iteratable components, which is great for building UIs on top of it)
Secure your connection endpoint

Component Support

Platform	Component	Support	Reference Name
Dialogflow	Default	Yes	DEFAULT
Webhook	Text Reply	Yes	DEFAULT
	Image	Yes	IMAGE
	Card	Yes	CARD
	Suggestion	Yes	SUGGESTIONS
	Payload	Yes	PAYLOAD
Google Assistant	Simple Response	Yes	SIMPLE_RESPONSE
	Basic Card	Yes	CARD
	List	Limited (subtitles are not returned by API)	LIST
	Suggestion Chips	Yes	SUGGESTIONS
	Carousel Card	Limited (some fields are not returned by API)	CAROUSEL_CARD
	Browse Carousel Card	No (not returned by API)	-
	Link out suggestion	Yes	LINK_OUT_SUGGESTION
	Media content	No (not returned by API)	-
	Custom Payload	Yes	PAYLOAD
	Table Card	No (not returned by API)	-
Messengers		Facebook, Slack, Telegram, Kik, Viber, Skype, Line	-
	Text Response	Yes	DEFAULT
	Image	Yes	IMAGE
	Card	Yes	CARD
	Quick Replies	Yes	SUGGESTIONS
	Custom Payload	Yes	PAYLOAD

Using this software may cost you money. PLEASE USE CAREFULLY

Dialogflow Gateway as a Service

Dialogflow Gateway is a software, that you need to install and keep updated, some users don't want to get into technical stuff and have no time and interest of doing it, so we are introducing a new Plan, for people, who want it to just work. Fo that, we will install and service your Dialogflow Gateway in our Cloud

Some Features:

Cost based on usage (Monthly subscription)
Free installation, maintenance and updates (but no modifications allowed, since Dialogflow Gateway ships as-is and there are some security concerns)
99.95% Uptime SLA with fixed URL and dedicated IP
Monthly analytics and usage reports of your endpoint (as E-Mail, CSV, JSON)

Interested? Contact me, to get a quote

Demo Time

I use REST Client for VSCode to make requests. You can execute these demos in extras/test.http

We will use my Dialogflow Test Gateway

Getting Agent information

GET https://us-central1-dialogflow-web-v2.cloudfunctions.net/gateway

Detect Intent (no formatting)

POST https://us-central1-dialogflow-web-v2.cloudfunctions.net/gateway
Content-Type: application/json

{
    "q": "Hi",
    "session_id": "test",
    "lang": "en"
}

Detect Intent (with formatting)

POST https://us-central1-dialogflow-web-v2.cloudfunctions.net/gateway?format=true
Content-Type: application/json

{
    "q": "Hi",
    "session_id": "test",
    "lang": "en"
}

Installation

GETTING SERVICE ACCOUNT

Go to Google Cloud IAM (Google Cloud Indian Access Manager)

And follow my Visual Guide:

Now you are ready to go.

Rename your downloaded file to `service_account.json` and follow the instructions below

CLONE THIS REPOSITORY

git clone https://github.com/MishUshakov/dialogflow-gateway.git

Or just Download ZIP and unpack it

Place your service_account.json in this directory

Run npm install or yarn in this folder

Run node index.js in this folder

When you see this message, you are ready to go:

Dialogflow Gateway is listening at http://[::]:8090

amarzana/dialogflow-gateway