Method to rotate a PDF CLOSE to completion!

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Posted on by martinav

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How hard should I work to make this happen? I think I found a way... Should I write it up?

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v-xida-msft on at

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Hi @martinav ,

Yeah. Thanks for your sharing firstly.

I think the solution you provided here would help many other users within this forum. I would also share this method to my colleagues.

Best regards,

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martinav 3,340 on at

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@v-xida-msft ,

Its NOT pretty... it involves doing some crazy base64 conversions and edits (is MS Flow) to change '/rotate 0/' to '/rotate 90/'. Its gotten VERY complicated. Its not quite working yet, and its exceedingly slow, because you have to do a "do until" loop to find the index of where its located in the base 64 file. Being that base64 works in 4 character chunks, its really messy. I had to put it aside for now.

Steps to completion:

Find '/rotate 0/' in the base64 code (done)

Find the index of the full block of base64 code that contains the '/rotate 0/' code. (done)

strip off any extra characters from the last block (working on this now)

Replace '/rotate 0/' with '/rotate 90/' in a full block (done)

piece together new first half of the file with the 2nd half of the file (done)

I was so close when I realized I was losing data from the last block when '/rotate 0/' only filled part of the last block.

I cant believe how complex it has gotten. Its like 25 steps right now. Even when its done, if I cant narrow down the index of '/rotate 0/' more precicely, it may be too slow. It has taken 30s to a minute until the "do until" is finished.

*PRELIMINARY* View:

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martinav 3,340 on at

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I bailed on this. Its not happening. Too much effort.

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Sgeo 2 on at

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Hi @martinav , for some reason i cannot explain, when i am in pdf viewer of my desktop app and hit with barcode scanner a qr code with link , pdf rotates one time clock wise!!! Qr code contains for example https://www.xxxxxxx.com. Maybe Carriage Return and Line Feed together is the solution!!!

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