Pdf viewer TI working on developer not working on server

Questions
1

Hi,
using PDF viewer in TI (Servoy version 2024.3.4) it works fine in developer, but in server not.
Looking at browser inspector it shows that error:

pdf.mjs:1 Failed to load module script: Expected a JavaScript module script but the server responded with a MIME type of “”. Strict MIME type checking is enforced for module scripts per HTML spec.
viewer.mjs:1 Failed to load module script: Expected a JavaScript module script but the server responded with a MIME type of “”. Strict MIME type checking is enforced for module scripts per HTML spec.

Is this a server configuration problem?
How can I solve it?

2

Hi Juan,

i had exactly the same problem with a customer last month.
The normal PDF Viewer would load the PDFs but PDFjs was not loading anything. I had the same Error-msg in the dev-console.
It seemed that something blocked .mjs files which PDFjs uses.

Servoy: 2024.9.1.4003
Tomcat 9
Servoy PDF Viewer: 2024.3.1

I fixed it like this:

In my Tomcat web.xml i added a mime-mapping block:

    <mime-mapping>
        <extension>mjs</extension>
        <mime-type>application/javascript</mime-type>
    </mime-mapping>

Restarted the Tomcat and it worked.

For some users it was still broken (they had a older chrome and firefox installed)
For this i opened the Developer-Console in the browser and under “Network” i enabled “deactivate Cache” → reloaded the page and it worked.
After that you can disable “deactivate cache” again.

[attachment=0]cache_problem.png[/attachment]

Hope it helps

P.S
oh and im loading the pdf via elements.pdfjs.documentURL = PDF_URL and not via dataprovider

var remoteJSFile = plugins.file.convertToRemoteJSFile(scopes.files.USER_TEMP_PATH_URL + 'invoice_' + _invoice_nr + '.pdf')
var remoteURL	 = plugins.file.getUrlForRemoteFile(remoteJSFile)
elements.pdfjs.documentURL = remoteURL

-Vik

cache_problem.png
cache_problem.png1132×467 47.5 KB

3

Ok Viktor, I will try.
I need to restart my tomcat to verify it.

Thanks for your reply.

4

newer tomcat already have this mime type setup by default.

5

Hi Johan,

just checked some things out.
Where using Tomcat 9.0.71 and added the mimetype ourself.

I looked at the tomcat changelog, it seems they added it in the version 9.0.85.

Just for future questions on this topic.