Hi,
The app I'm currently building in PowerApps utilizes a camera and pen input function, where in essentially you take a picture and you're then given the option to draw on said picture using the Pen Input function so as to add notes, annotations, etc. At the moment I have it so that when the picture is taken and the notes are added, both are added to Azure Storage as two separate images, and what I'm trying to do is merge them using a Flow, which receives all the information about the images, and then uses HTTP call to a free API called 'Convert API' to join them together.
Below is my Flow as it currently is:
For the most part it runs smoothly, however when it reaches the HTTP step, it fails with the below error:
"{"Code":4002,"Message":"Bad JSon format. The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters. "}"
I'm thinking that the error is possibly coming from the HTML input that gets passed along, specifically the "data:image/png;base64," header, but I'm not 100% sure, and if it is that how would I go about removing it?
Any help would be appreciated - Thank you!
Thankyou for your assistance so far - as advised I've now stored the data in a variable and used the mid() formula on it, which when looking at my output now appears to have removed the extra path information, however the Flow is still failing and I'm still getting the same message as before:
"{"Code":4002,"Message":"Bad JSon format. The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters. "}"
There must be a junk character in there somewhere, but I'm having no luck finding it:
The only other thing that's occurred to me that could possibly be incorrect is the ImageHTML variable I've got in the Flow, and whether the DataURI Expressions I'm using are causing an issue:
If you have any input I'd be most appreciative.
Further to my last post, I've tested sending the Photo and Drawing variables separately to the API and both have been successful, so as I see it there's no issue with the base64 of the images themselves.
In which case, I think the issue comes down to my writeup of the ImageHTML variable, which includes both the Photo and Drawing variables (base64 makeup of both images) and the sizing information.
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