Added HandlingAttachments

[tracyboehrer]

Neither Test in WebChat or Emulator appear to work when adding an attachment. I used Insomnia (or Postman) to send an Activity with an attachment.

{
	"type": "message",
	"channelId": "webchat",
	"activityId": "1",
	"conversation": {
		"id": "1"
	},
	"from": {
		"id": "from",
		"name": ""
	},
	"recipient": {
		"id": "me",
		"name": "me"
	},
	"attachments": [
		{
			"name": "image",
			"contentType": "image/png",
			"contentUrl": "https://devblogs.microsoft.com/microsoft365dev/wp-content/uploads/sites/73/2024/11/word-image-23435-1.png"
		}
	],
	"text": "image attached",
	"deliveryMode": "expectReplies",
	"serviceUrl": "https://webchat.botframework.com/"
}

[rido-min]

I've been able to see the attachments from WebChat and Teams

[rido-min]

probably for another discussion, but having the launchSettings.TEMPLATE seems a good approach for 1) set the port and 2) override the auth settings without adding the appserttings.Development.json (that during deployment will be included in the deployment artifact)

[tracyboehrer]

I've been able to see the attachments from WebChat and Teams

The file downloaders only come into play when an Activity is received by the agent, not sent. In Teams, this can be tested in two ways: drag-and-drop (which requires a token), and attaching a file.

[tracyboehrer]

I've been able to see the attachments from WebChat and Teams

The file downloaders only come into play when an Activity is received by the agent, not sent. In Teams, this can be tested in two ways: drag-and-drop (which requires a token), and attaching a file.

Correction... there are 3 ways: drag-and-drop, attach, and paste.

I believe it's paste that requires the token. Though the way TeamsAttachmentDownloader was written, it just adds to token to all Teams scenarios.