Xporter for Jira allows you to export diagrams from Gliffy Diagrams for Jira app as a normal image.
Definition
Install the app and add the Gliffy diagrams to your issue.
To export the image and its properties, include the following mapping on your template:
#{for images}
// Retrieve extension from filename and save it on extension variable
${set(extension,%{var name = '${Images[n].Name}'.split('.'); var extension = name[1]; extension})}
// If the image extension is 'gliffy' export all info about the attached image
#{if (%{'${extension}'.equals('gliffy')})}
${Images[n].Image}
${Images[n].Name}
${Images[n].ID}
${Images[n].Size}
${Images[n].HumanReadableSize}
${Images[n].Author}
${Images[n].Created}
${Images[n].MimeType}
${Images[n].ThumbnailURL}
#{end}
#{end}
That's it. No other special configuration is needed.
Example
Let's export a Gliffy Diagram.
As you can see in the image below, we've already created a diagram.
Then, we export it using the template previously created.