Transform base 64 image to base64 pdf

[vincentsm33]

Hello,

i would like to transform a base64 image in base64 pdf.
I received from a CDA file an image encoded base64 and i would like to transform this image in a pdf encoded base 64.

I thought of a possibility which consists in creating 3 connectors:

• A first connector retrieves the image encoded in base 64, with a channel writer as its destination.
• A second connector transforms the image base64 received from the first connector into a PDF (file writer in binary mode) and deposits the PDF locally.
• A third connector retrieves the PDF deposited locally and transforms it into base64, in order to reinject it into the first connector.

I find it complex.
Wouldn't there be an easier solution allowing me to transform the base64 encoded image into a base64 encoded pdf.

Thank you for you precious help.

[odo]

This can be done in a JavaScript transformer step.

You have to

1. Decode your base64 image
2. Transform it to pdf e.g. via iText
3. Encode the pdf into base64

imageToPdfA.png

Unfortunately the forum again does not let me copy/paste code thus I had to use a screenshot instead.

Download and import this code template: imageToPdf()_v1.1.xml

[pacmano]

Is the PDF in the CDA the image only? Or is it a PDF with text and an image? A sample CDA here would be helpful.

[vincentsm33]

This can be done in a JavaScript transformer step.

You have to

1. Decode your base64 image
2. Transform it to pdf e.g. via iText
3. Encode the pdf into base64

The code could look like follows (I did not test it, so it might contain bugs):


Unfortunately the forum again does not let me copy/paste code thus I had to use a screenshot instead. This example uses iText 5.

Thank you for your reply and your help.
Attached is the channel with your code but it does not work.

I have an error :
DETAILS: ReferenceError: "PageSize" is not defined

[vincentsm33]

Is the PDF in the CDA the image only? Or is it a PDF with text and an image? A sample CDA here would be helpful.

Thank you pacmano for your reply and help.

Yes image and PDF are similar.

I just want to transform IMAGE BASE 64 into PDF BASE64, without adding text.


The CDA is a test, i just extract base64 of this CDA in a variable, so it does not represent a real interest, but i attach a photo of this CDA.
If you need more, I am at your disposal

[pacmano]

I do not understand "Yes image and PDF are similar."

Do you mean "The PDF is the image, there is nothing else in the PDF other than the image"?

If yes, you can just extract and save the base64 version, you don't need to parse its contents at all.

OR is the base64 in the XML an image, not a PDF?

[vincentsm33]

I do not understand "Yes image and PDF are similar."

Do you mean "The PDF is the image, there is nothing else in the PDF other than the image"?

If yes, you can just extract and save the base64 version, you don't need to parse its contents at all.

OR is the base64 in the XML an image, not a PDF?

Oh, sorry for expressing myself badly. I meant that in the XML I have an image (encoded in base 64), not a PDF.

I would like to transform my XML so that instead of the image (encoded in base64), I have a pdf (encoded in base64) corresponding to my starting image

[pacmano]

Another way:

NOTE THE STUPID FORUM SOFTWARE ADDS EXTRA SPACES SOMETIMES

add this the mcservice.vmoptions:

-Djava.protocol.handler.pkgs=org.xhtmlrenderer.prot ocols
-classpath/a extensions/doc/lib/flying-saucer-core-9.0.1.jar

Let's assume you collect the base64 image into a channelMap variable named "image",

In a document writer you can then create a PDF with:

2022-04-14_11-57.jpg

In my source XML:

<xml><image> the base64 string is here </image></xml>

in the attachment viewer:


2022-04-14_11-59.jpg

[pacmano]

I would use the attachment handler to save space in general here, this is a great article: https://forums.mirthproject.io/artic...ng-attachments

In your case you can grab the image in the XML as an attachment.

[odo]

I have an error :
DETAILS: ReferenceError: "PageSize" is not defined

Use com.itextpdf.text.PageSize instead of PageSize

[vincentsm33]

Use com.itextpdf.text.PageSize instead of PageSize

I already try this by searching on Google but i have an error :

"cannot read property "A4" of null"

Thank you !

[odo]

Please find a tested and fixed version in my initial post.

This version is using iText 5. Please also assure that iText 5 is supported by your mirth version.

[vincentsm33]

Please find a tested and fixed version in my initial post.

This version is using iText 5. Please also assure that iText 5 is supported by your mirth version.

Slim ! I found the cause of the error. Mirth now uses PDFBOX

[vincentsm33]

I would use the attachment handler to save space in general here, this is a great article: https://forums.mirthproject.io/artic...ng-attachments

In your case you can grab the image in the XML as an attachment.

Pacmano, I followed your recommendations, and in my output connector I have my attachment in PDF form.

On the other hand, I do not understand how to transcribe it into pdf in base64 format in a variable in order to put it in my starting XML file.

[pacmano]

Either in your response transformer for that step or the next destination, build a new XML message. The outbound message template would be the stub of your new XML message. This forum has posts on how to get an attachment once created.