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Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

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Posted on 8 Mar 2022 15:23:07 by flowuser6

I marked a solution below as to what is needed for the images to work for this flow. But ultimately my issue was because of the image file size (not the format).

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I'm working a flow and everything works as expected for a news post's Banner Image URL using a jpg image file. But when a PNG image file is being used instead, the image does not display in the email desktop application nor the web application for Outlook. The JPG file does show, though, in both Outlook's desktop and web. And Outlook is the primary email application being used for our purposes.

I'm using two "Get File Content Using Path" steps. The first one is a static image, and that works just fine. The second one needs to be dynamic per the news post, and that is the one that works with jpgs but not pngs. The input url for the file path in this second one works when I paste it into the browser search bar. I've attached a partial screenshot of what the output for this second "Get File Content Using Path" looks like. It is super long!

Here are the expressions for the datauri items in the email body:

1st instance: @{dataUri(outputs('Get_file_content_using_path')?['body'])}

2nd instance: @{dataUri(outputs('Get_file_content_using_path')?['body'])}

I've tried every solution I could find, but haven't been able to figure this out. Maybe it is something so simple that I am missing?! I'm fairly new at this, so learning as I go along. I've attached screenshots of the flow. Hoping there is an answer out there! Thank you!

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Ellis Karim 11,472 Super User 2025 Season 2 on 08 Mar 2022 at 15:46:41

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Re: Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

Please take a look at this post:

https://powerusers.microsoft.com/t5/Building-Flows/Get-file-jpg-from-SharePoint-folder-and-insert-image-as-email/m-p/1486224/highlight/true#M166161

Ellis
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flowuser6 31 on 08 Mar 2022 at 16:21:45

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Re: Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

Thank you for posting that! I took a look at it and incorporated those steps into my flow, but it still did not work.

In the body email I put: <img src="data:@{outputs('ComposeContentType')};base4,@{outputs('ComposeContent')}">

But in the email it sent out, in the "View Source" I got: <img> It took out everything from the img tag.

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Ellis Karim 11,472 Super User 2025 Season 2 on 08 Mar 2022 at 16:29:29

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Re: Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

What do you see during runtime? For example, here is my runtime output for the demo flow:

Ellis

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flowuser6 31 on 08 Mar 2022 at 16:37:39

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Re: Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

Your outputs look so perfect! But mine has that really long code from the start of the "Get File Content Using Path 2" step. The input/output for the "ComposeContent" step is using that long code, too. Any idea what I'm doing wrong?

Here are the screenshots.

Partial screenshot of "Get File Content Using Path 2" outputs when I click to download:

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Ellis Karim 11,472 Super User 2025 Season 2 on 08 Mar 2022 at 16:39:12

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Re: Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

I've just seen a typing error. It needs to be base64

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flowuser6 31 on 08 Mar 2022 at 16:47:10

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Re: Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

I was really hoping that was the issue! I updated the body email so it has base64, but the email still isn't showing the png file.

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Ellis Karim 11,472 Super User 2025 Season 2 on 08 Mar 2022 at 17:01:20

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Re: Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

Please show the runtime output again.

If the content-type and content appear OK, then I suspect it's the HTML code used in the send email action.

Can you construct a very simple Send Email action such as:

<img src="data:@{outputs('ComposeContentType')};base4,@{outputs('ComposeContent')}">

Ellis

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flowuser6 31 on 08 Mar 2022 at 18:53:44

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Re: Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

Ellis, thank you very much for sticking with this and helping me out! I tried an email with just the image tag as suggested, but it still didn't work out for me.

Email Body

Email Run

Email Input Download:
Email Input Download

Email Output Download:
Email Output Download

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Ellis Karim 11,472 Super User 2025 Season 2 on 08 Mar 2022 at 19:42:58

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Re: Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

(1) Please show the message that is sent, for example the demo flow I created sent the following email message and image:

(2) and please show the outputs of the compose action:

This is the demo flow that I have been using:

Ellis

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flowuser6 31 on 08 Mar 2022 at 20:09:55

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Re: Insert Banner Image URL into email body - Works fine with jpg files but not PNG images

Attached is a screenshot of the email I receive, it is just blank. In the browser application, when I use the inspect tool from the browser, this is what it reads:
<img data-imagetype="Empty" data-imageerror="SrcNullOrEmpty">

Here are the screenshots of the flow. So, I'm using the compose steps at the beginning to get the clean url from the Banner Image URL dynamic item (maybe these initial steps is what is wrong with my flow?). I'm using these, though, to get the clean version of the Banner Image URL since when I first inserted that into the "Get file content using path" didn't work. And here are the screenshots of the outputs.

email received
Compose steps to get file path of Banner Image Url:
The compose steps to get the file url

Compose Outputs after "Get file content using path 2":
compose steps after Get File Content Using Path

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