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Downloading images from hosted content - accessing images in body of teams message?

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Posted on 14 Nov 2024 15:58:47 by robb1

When a user using Teams on an iPad adds images from the iPad photo library to a message, it adds them to the body of the message not as an attachment.

I have built a flow that can get the attachments of a Teams channel message and then do xyz with them, but cannot work out how to get images that are in the body of messages.

I have been experimenting with using the ‘Send a Microsoft Graph HTTP request’ action as I believe the images are somewhere in the hosted content?

However, this is going way beyond my current expertise!

https://learn.microsoft.com/en-us/graph/api/chatmessagehostedcontent-get?view=graph-rest-1.0&tabs=http#http-request

I can’t find anyone else who has shared a working solution! – Can anyone help?

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Business Process Flows

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robb1 11 on 15 Nov 2024 at 09:57:47

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Downloading images from hosted content - accessing images in body of teams message?

Thanks very much Mark, I will give that a go and let you know the results!
Mark Nanneman 989 Super User 2025 Season 1 on 14 Nov 2024 at 19:26:50

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Downloading images from hosted content - accessing images in body of teams message?

Using "Send a Microsoft Graph HTTP" actions to get the content id and then the image file content seems like it should work, given some of the endpoints that are published, but I also could not get it to work at all either testing just now. In fact I couldn't get any "Send a Microsoft Graph HTTP" to work, and when I tried using the demo ones on Microsoft's page they wouldn't work either. Would love to hear if someone else knows more about it.

That said, after a few tests I was eventually able to download the hosted content from a Teams message by parsing out the url from the <img> element's "src=" property and sending this to a HTTP GET action.

You can parse out the whole thing using some nested split() and first()/last() functions, or you could feed the message html to a GPT action and give it a prompt to extract the img url.

The link to the image appears to follow this format.

https://graph.microsoft.com/v1.0/chats/{chatId}/messages/{messageId}/hostedContents/{hostedContentId}=/$value

You just get that and give it to a generic HTTP GET action (along with proper authentication).

The only catch here is the HTTP GET action needs proper authorization. There's probably a few ways to do it, I just used an App User I have for making other API calls in my system. I had to go into Entra and grant it some Graph API Permissions to read chats, etc.

Here's a camera snap I sent from my tablet to a teams chat.

Here's the image after the flow saves it to sharepoint
robb1 11 on 14 Nov 2024 at 16:34:12

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Downloading images from hosted content - accessing images in body of teams message?

"body": {
"contentType": "html",
"content": "Test message content text.\n \n<img src=\"https://graph.microsoft.com/v1.0/teams/c9d0e644-4171-4128-9edc-aff1c8b5d959/channels/19:0fa018bfdd6743fdbdb4cb3db9db2a53@thread.tacv2/messages/1731601758999/hostedContents/aWQ9eF8wLXN1ay1kNC01YzM5NGIxM2FlMWM2OTAyM2U3MTVlZjcyZWYzNDMyMyx0eXBlPTEsdXJsPWh0dHBzOi8vdWstYXBpLmFzbS5za3lwZS5jb20vdjEvb2JqZWN0cy8wLXN1ay1kNC01YzM5NGIxM2FlMWM2OTAyM2U3MTVlZjcyZWYzNDMyMy92aWV3cy9pbWdv/$value\" width=\"265\" height=\"157\" alt=\"image\" itemid=\"0-suk-d4-5c394b13ae1c69023e715ef72ef34323\">",
"plainTextContent": "Test message content text.\n \n"
Mark Nanneman 989 Super User 2025 Season 1 on 14 Nov 2024 at 16:02:53

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Downloading images from hosted content - accessing images in body of teams message?

Interesting... what is the format of the image content in the message? Can you post a screenshot?