How to upload attachments using HTTP on Power Automate?

Question

My flow is triggered by receiving an email that contains an attachment. I will then need to reference the contents of that attachment when creating a document record in my http step.

The body of my http request:

After running the flow, the dynamic content is showing bolded ?'s in the output. I would think this is the reason why my flow is failing.

On the first attempt (with the same JSON body), the file contents showed none of these characters and everything ran smoothly. After that, these characters have showed up in every attempt and I have not had the flow succeed since. Does anyone know how to fix this?

Answer 1

You don't specify which flavour of http action you are using (there are a few in power automate), but generally to avoid issues with attachments in http requests, you may want to use base 64 encoding. This will avoid any special characters withing the attachments that may invalidate json etc...

You may want to look at either encoding it as base 64, or possibly the original raw email file would work as these are base 64 already.

Answer 2

Hi jayman,

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