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Bruce Cantor

Subject: Problem base64 decoding string - base64 string cannot be converted to pdf file
Author: Bruce Cantor
Date: 26 Oct 2023 09:48 AM
Originally Posted: 26 Oct 2023 08:43 AM

Hi,

I am having this problem with a base64 encoded string:
When I decode it and save it to disk the resulting pdf file can be opened but all text and images are gone.

My code is like this:

let $pdfFileEncoded := "encodedstring"

let $pdfFileDecoded := ddtek:base64-to-string(xs:base64Binary($pdfFileEncoded), "utf-8")
let $pdfDocRes := if( xps_file:writeAll($pdfOutput_URI,$pdfFileDecoded) ) then $pdfOutput_URI else "error"

I tried to change 'utf-8' to 'iso-8859-1', but that does not make the result better.

Can anybody tell me why I get an incomplete pdf? I can be opened, but it is not good looking.

Attached my encoded string.

PS: The string can be decoded with other tools with a more successfully result. (https://base64.guru/converter/decode/pdf)

encodedString.txt
Encoded string

Ivan Pedruzzi

Subject: Problem base64 decoding string - base64 string cannot be converted to pdf file
Author: Ivan Pedruzzi
Date: 26 Oct 2023 02:38 PM

Bruce

if you have a base64 string and you want to decoded into binary
You simply do this:

let $pdfFileEncoded := "......"

let $output_url := fn:resolve-uri("mypdf.pdf", fn:static-base-uri())

return ddtek:serialize-to-url(<root>{$pdfFileEncoded}</root>, $output_url, "method=base64")

you code does the opposite, from binary to base64.

Ivan Pedruzzi
Stylus Studio Team

Bruce Cantor

Subject: Problem base64 decoding string - base64 string cannot be converted to pdf file
Author: Bruce Cantor
Date: 30 Oct 2023 09:09 AM

Thank you, I see it now.

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