I built a flutter web application and have previously whole backend setup on AWS. So I want to use my existing userpools from cognito in my app. But just got know that AWS amplify for flutter in only supported in android and ios,not for web. Can you suggest me any solution for this?
Try using this package: https://pub.dev/packages/amazon_cognito_identity_dart_2
I've been using it for a while, and it works fine on Android and Web; I think I even got it working on iOS.
What Amplify team did with official Flutter package was use a wrapper around existing Android and iOS implementation (by using platform channel). I guess this is a reason it will take them a while to sort out web.
The above package is based on amplify-js, and re-written in dart, so it will compile on any platform.
In my project workspace I created two separate projects: one with amplify to create back-end objects, and one flutter project. So, like in your case, my flutter project connects to an existing AWS backed.
Related
Am Exploring Amazon Honeycode Beta version for web/Mobile app development. Am able to develop an app in Amazon Honeycode Portal. Am trying to understand that is there any possibility to move the honeycode app to Android Play store or Amazon restrict only to Team members who has installed Honeycode app ?
You can invite users to the app however are you asking for an Android Native app?
It depends how easy it is to jump out of the walled garden. If your app is a fully fledged website then you're good to go directly to the app and use a thin wrapper like electron. However based on the documentation you're app is making api calls, the HoneyCode app is doing the heavy lifting for the frontend.
To build your own you would need a frontend to make the same api calls and render it.
The api only has two apis. Probably check if you can get the data you want working first before building the frontend.
Something like amplify handles the frontend better.
I have basic understanding of .net and chatbot.
I wanted to integrate Amazon lex in xamarin(ios, android)app. There seems to be no example or sample. I have created chatbot from AWS platform intent and slots.
Also I wanted to use database to get query return. Any sample to integrate AWS Lex with Xamarin app would be helpful.
As I understand from your question, you already have some implementation of chatbot made with AWS services, but you are having issue on integrating it to your xamarin application to be able to use it in IOS and Android devices.
For that purpose, there is AWS Mobile SDK which happens to support also xamarin.
From their link:
https://docs.aws.amazon.com/mobile/sdkforxamarin/developerguide/Welcome.html
I also did not find a Lex tutorial directly, but a very promising quote:
Supported AWS services currently include, but are not limited to [narrow list of services]
was on the same page. I looked around, found this text:
The AWS Mobile SDK for .NET and Xamarin also allows you to use most of the AWS services supported by the AWS SDK for .NET. The AWS services specific to mobile development are explained in this developer guide. For more information about the AWS SDK for .NET, see [a link]
clicked the link and ended here:
https://docs.aws.amazon.com/sdkfornet/v3/apidocs/Index.html
and under link AmazonLex -> AmazonLexClient there was something, you probably wanted to see:
Version Information
.NET Standard:
Supported in: 1.3
.NET Framework:
Supported in: 4.5, 4.0, 3.5
Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms
Those 3 last let me understand that whenever you setup Mobile SDK, you get access to AWS services in Xamarin, also Lex.
Steps to install on
https://docs.aws.amazon.com/mobile/sdkforxamarin/developerguide/setup.html
mainly contain steps on how to create xamarin app and get AWS account, most important is to install the AWS Mobile SDK for .NET and Xamarin and configure it. More detailed steps are under that link.
After that the process is to follow the instructions on:
https://aws.amazon.com/getting-started/projects/bots-just-got-better-net-toolkit-lex-lambda-cognito/module-one/
like pointed in comments. I suppose once you have access to any service via Mobile SDK, the wire up of Lex may go in similar steps and no special just xamarin tutorial is not needed anymore.
It seems you are looking for both architecture and sample code for implementing AWS Lex bot with .NET backend that can be integrated with iOS/Android Frontend.
You have multiple choices here to do it
Build both chat user interfaces in iOS and Android and integrate them AWS iOS & Android SDKs to utilize the AWS LEX bot.
Just implement a bot user interface in iOS and Android app and integrate it with a .NET backend that can utilize AWS .NET SDK to integrate with your LEX bot.
I would recommend the second approach as it will save you writing the LEX integration code twice both in Android and in iOS. In the second appraoch you will be able to write a single integration for AWS LEX in .NET and that can give a unified experience across the mobile devices(iOS/Android)
Now for the .NET based backend integration with AWS LEX bot.
If you are an experienced .NET developer and you know how will you host your code then only thing that you need is the .NET API reference for AWS LEX, which can be found here
https://docs.aws.amazon.com/sdkfornet/v3/apidocs/items/Lex/TLexClient.html
But if you are not sure how to write this integration code and also not sure how the deployment will look like then you can follow the below tutorial
Bots Just Got Better with .NET and the AWS Toolkit for Visual Studio
Also, find here the architecture form the above tutorial
there is no direct solution like Amazon Lex is supported by React-native. i confirmed with xamarin team as well as AWS service one of the member. direct integration not possible.
I'm trying to setup Amazon Cognito with a custom UI I've set up in Swift for iOS. The built-in UI from the Amazon iOS SDK doesn't fit the look of the app, so I can't use it.
Anyone here have advice on how to use Amazon Cognito with a custom UI?
This tutorial shows me how to use Cognito, but NOT using a custom UI.
There are two available AWS SDKs to satisfy this use-case:
The AWS iOS SDK[a].
The AWS Amplify iOS SDK[b].
For a sample app that you could use as a reference while writing code, you could also take a look at this iOS application[c], and build your own application with a custom UI while referring to the steps in the readme of the application. This Github repository has codes both in Objective C and Swift, which is another bonus.
References
[a]. https://github.com/aws-amplify/aws-sdk-ios
[b]. https://aws-amplify.github.io/docs/ios/authentication
[c]. https://github.com/awslabs/aws-sdk-ios-samples/tree/master/CognitoYourUserPools-Sample
how to use AWS RDS in flutter dart code?
I went through - this post
It says -
I work on the AWS SDK team. I am not aware of any plans to support Flutter at this point. I will take this to my team as a feature request and will post back
Should I do as suggested here?
Build your own service layer using HTTP, gRPC that talks to some backend service that provides access to a data store. You can do this with Express, Rails, CloudFunctions, etc.
You can either use dart code to do HTTP/gRPC, or use Platform channel to wrap dart code around native iOS and Android code of AWS official SDK.
On another note, I'm highly concerned when you connect directly from mobile (Flutter) to database (AWS RDS). Please be aware that anything on mobile app can be reversed engineer, and your database connection credential is not safe. It's recommended to have only backend proxy, or at least severless (such as AWS lambda function) connect directly to database (not mobile or web frontend). The only exception is with Firebase Realtime Database because it has seamless integration with Firebase Authentication
Ionic2 is Typescript based, and Amazon is providing javascript only version of its library.
Is it possible to integrate the Amazon aws-sdk into an Ionic2 app?
I have tried multiple methods including creating a typings file (and tsd), and trying to work out aws-cognito-angular2-quickstart but no luck so far...
Is creating an external javascript library and integrating it into the typescript code my only option?
Has anyone succeeded using Amazon Cognito from Ionic2 app?
You need to add typescript definitions of the AWS-SDK in your ionic2 and/or angular2 app. This will allow you to use all build-in functionalities provided in the AWS-SDK including Cognito.
Look at here to get started.