Teams File Upload Bot

Code Sample
06/04/2024

Bot Framework v4 file upload bot sample for Teams.

This bot has been created using Bot Framework, it shows how to upload files to Teams from a bot and how to receive a file sent to a bot as an attachment. It also shows how to fetch inline images sent in message.

Included Features

Bots
Adaptive Cards

Interaction with bot

File Upload

Try it yourself - experience the App in your Microsoft Teams client

Please find below demo manifest which is deployed on Microsoft Azure and you can try it yourself by uploading the app package (.zip file link below) to your teams and/or as a personal app. (Sideloading must be enabled for your tenant, see steps here).

Teams File Upload Bot: Manifest

Prerequisites

Microsoft Teams is installed and you have an account
NodeJS
dev tunnel or ngrok latest version or equivalent tunnelling solution
Teams Toolkit for VS Code or TeamsFx CLI

Run the app (Using Teams Toolkit for Visual Studio Code)

The simplest way to run this sample in Teams is to use Teams Toolkit for Visual Studio Code.

Ensure you have downloaded and installed Visual Studio Code
Install the Teams Toolkit extension
Select File > Open Folder in VS Code and choose this samples directory from the repo
Using the extension, sign in with your Microsoft 365 account where you have permissions to upload custom apps
Select Debug > Start Debugging or F5 to run the app in a Teams web client.
In the browser that launches, select the Add button to install the app to Teams.

If you do not have permission to upload custom apps (sideloading), Teams Toolkit will recommend creating and using a Microsoft 365 Developer Program account - a free program to get your own dev environment sandbox that includes Teams

Setup

Note these instructions are for running the sample on your local machine, the tunnelling solution is required because the Teams service needs to call into the bot.

Run ngrok - point to port 3978
```
ngrok http 3978 --host-header="localhost:3978"
```
Alternatively, you can also use the dev tunnels. Please follow Create and host a dev tunnel and host the tunnel with anonymous user access command as shown below:
```
devtunnel host -p 3978 --allow-anonymous
```

Setup for bot

In Azure portal, create a Azure Bot resource. - For bot handle, make up a name. - Select "Use existing app registration" (Create the app registration in Microsoft Entra ID beforehand.) - If you don't have an Azure account create an Azure free account here

In the new Azure Bot resource in the Portal, - Ensure that you've enabled the Teams Channel - In Settings/Configuration/Messaging endpoint, enter the current https URL you were given by running the tunneling application. Append with the path /api/messages

Setup for code

Clone the repository

git clone https://github.com/OfficeDev/Microsoft-Teams-Samples.git

In a terminal, navigate to samples/bot-file-upload/nodejs
Install modules
```
npm install
```
Update the .env configuration for the bot to use the Microsoft App Id and App Password from the Bot Framework registration. (Note the App Password is referred to as the "client secret" in the azure portal and you can always create a new client secret anytime.) MicrosoftAppTenantId will be the id for the tenant where application is registered.

Also, set MicrosoftAppType in the .env. (Allowed values are: MultiTenant(default), SingleTenant, UserAssignedMSI)

Run your bot at the command line:
```
npm start
```
This step is specific to Teams.
- Edit the manifest.json contained in the appManifest folder to replace your Microsoft App Id (that was created when you registered your bot earlier) everywhere you see the place holder string <<YOUR-MICROSOFT-APP-ID>> (depending on the scenario the Microsoft App Id may occur multiple times in the manifest.json)
- Edit the manifest.json for validDomains with base Url domain. E.g. if you are using ngrok it would be https://1234.ngrok-free.app then your domain-name will be 1234.ngrok-free.app and if you are using dev tunnels then your domain will be like: 12345.devtunnels.ms.
- Zip up the contents of the appManifest folder to create a manifest.zip (Make sure that zip file does not contains any subfolder otherwise you will get error while uploading your .zip package)
- Upload the manifest.zip to Teams (In Teams Apps/Manage your apps click "Upload an app". Browse to and Open the .zip file. At the next dialog, click the Add button.)
- Add the app to personal scope (Supported app scope)

Note: If you are facing any issue in your app, please uncomment this line and put your debugger for local debug.

Running the sample

Note this manifest.json specified that the bot will be installed in "personal" scope which is why you immediately entered a one on one chat conversation with the bot. Please refer to Teams documentation for more details.

Adding the bot:
Sending a message to the bot will cause it to respond with a card that will prompt you to upload a file. The file that's being uploaded is the teams-logo.png in the Files directory in this sample. The Accept and Decline events illustrated in this sample are specific to Teams. You can message the bot again to receive another prompt.
You can send a file to the bot as an attachment in the message compose section in Teams. This will be delivered to the bot as a Message Activity and the code in this sample fetches and saves the file.
You can also send an inline image in the message compose section. This will be present in the attachments of the Activity and requires the Bot's access token to fetch the image.