Diagrams do not render correctly (SVG / PNG)

[laingsimon]

Draw.io offloads PDF rendering to a webservice, https://exp-pdf.draw.io/ImageExport4/export, it may be possible to re-use this - or identify how it works to achieve the same result in-house.

Reproduction steps

http://localhost:8080/?url=https://laingsimon.github.io/render-diagram/Sample%20file.xml&format=png

actual	expected

POST https://exp-pdf.draw.io/ImageExport4/export HTTP/1.1
Host: exp-pdf.draw.io
Content-Type: application/x-www-form-urlencoded

format=png&allPages=1&bg=none&base64=0&embedXml=0&xml=<url encoded file content>

This method works for PDF & PNG exports, but doesn't support SVG

[laingsimon]

Java renderer now offloads PNG rendering to the ImageExport4 service however isn't able to do so for svg formatted images.

Options are:

• update ImageExport4 via a pull request to JGraph
• create a nodejs app to render the images in SVG format where requested - could easily be a fork of the ImageExport4 product

Issue raised to consider the introduction of a svg renderer in ImageExport4

[laingsimon]

The following is an option: