Can't export a diagram as PDF

[ane-gabriela]

Preconditions: Have a diagram page created with added shapes.

1. Edit the diagram page
2. Click on File > Export as > PDF...
3. Click on Export
4. Choose a name for the diagram
5. Click on Download

Expected results: The diagram is exported as PDF.

Actual results: The diagram isn't exported

Environment: Windows 11, Chrome 125. Cloud XWiki 15.10.8, Diagram Application (Pro) 1.20.4

[mflorea]

Note that here are two ways you can export a diagram to PDF:

• From the diagram editor: the diagram is sent to a remote service to perform the conversion to PDF. This remote service is configurable, but by default diagrams.net is used which we don't control. Such a remote service can obviously be down, have access limits, misbehave or change its behavior in a way that is not backwards compatible with our version of draw.io
• from the page view mode: the diagram is exported to PDF by us, which is normally more reliable

So we need to check:

• if the failure is temporary or related to some service limits
• if the failure is caused by some specific diagram content
• if the failure is caused by a change in the service URL or expected parameters
• if the failure is caused by a change in the service implementation that is not backwards compatible with our version of draw.io

[oanalavinia]

I am still investigating on this issue, couldn't find the root cause yet.

It's important to mention that the structure of the request altered a little on newer drawio versions. For example there are more parameters for this method and these could be required for the request to work. So a drawio upgrade seems necessary anyway.
On another note, I did tried locally to apply these changes and the export still doesn't work, but I might be missing something (there are a lot of changes to consider). Unfortunately, the request response is not giving that much information.
I would suggest to go on with the drawio upgrade and that come back at this issue

Until this is fixed, it's important to know that File -> Print could be used as a workaround, and it's actually safer since you don't send your data to an external server. Check https://www.drawio.com/blog/export-pdf#secure-pdf-generation

[ilieandriuta]

Issue reproduced too on XWiki 16.4.0 using Diagram Application (Pro) 1.20.5.

[snazare]

proposal: when clicking on File - Export As - PDF use the File -> Print service. To check again post upgrade to drawio

[ane-gabriela]

@snazare Tested on XWiki 15.10.10 with version 1.21-rc-1, extension id com.xwiki.diagram:application-diagram (drawio24.5.5) - got the same result as above, the diagram is not exported

Steps to reproduce:

1. While editing the Diagram click on File > Export as > PDF... >Export
2. Select a name for the exported diagram
3. Select Device / Download / Open in New Window
4. Click on the Save or OK button depending on the selection made previously

Actual results: No matter the selection made the result is the same - no diagram appears in the export

[snazare]

to be handled in #288