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Teams File Upload Bot

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.

Prerequisites

  • Microsoft Teams is installed and you have an account
  • ngrok or equivalent tunnelling solution

To try this sample

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.

  1. Clone the repository

    git clone https://github.com/Microsoft/botbuilder-java.git

  2. Run ngrok - point to port 3978

    ngrok http -host-header=rewrite 3978

  3. Create Bot Framework registration resource in Azure

  4. Update the resources/application.properties 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.)

  5. This step is specific to Teams.

    • Edit the manifest.json contained in the teamsAppManifest 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)
    • Zip up the contents of the teamsAppManifest folder to create a manifest.zip
    • Upload the manifest.zip to Teams (in the Apps view click "Upload a custom app")

  6. From the root of this project folder:

    • Build the sample using mvn package
    • Unless done previously, install the packages in the local cache by using mvn install
    • Run it by using java -jar .\target\bot-teams-file-upload-sample.jar

Interacting with the bot in Teams

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.

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 also 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.

Deploy the bot to Azure

To learn more about deploying a bot to Azure, see Deploy your bot to Azure for a complete list of deployment instructions.

Further reading