I’m trying to follow almost exactly the dynamic image example from the docs. I am failing to get it to work. Nothing ever shows up in the preview.
My parameters:
My image properties:
The gateway is running in a cloud architecture w/ restricted networking, so firewalling could feasibly have been an issue. I convinced myself that wasn’t it by logging into the shell account of the user that runs the gateway and did a wget of the same URL from the command line. That worked fine.
What else could I be doing wrong?
(Ignition 8.1.3)
EDIT: I finally got it working by trying a URL with basic HTTP (not HTTPS). Is the reporting engine unable to support HTTPS image fetches? The certificates on the server I was fetching from are chained from a well-known CA, so that shouldn’t be an issue.
Alright … Here’s a list of lessons about using dynamic images from the Image Manager in reports that I’ve learned by trial-and-error in the past day:
As of Ignition 8.1.3, you cannot use HTTPS URLs to fetch images for reports.
You cannot reference images in the Image Manager simply with a key of /system/images/blah.jpg
You cannot reference images in the Image Manager using https://localhost:8043/system/images/blah.jpg (see item 1 above)
You cannot reference images in the Image Manager using http://localhost:8088/system/images/blah.jpg if you have “Force Secure Redirect” enabled in the Gateway Web Server settings
The Designer cannot preview images in reports that reference http://localhost:8088/... since the preview tries to do the fetch from the Designer computer, which doesn’t have a web server running on it (normally).
If you disable “Force Secure Redirect” and use a URL like http://localhost:8088/system/images/blah.jpgand run the report on the gateway, you can dynamically fetch an image from the Image Manager into a report.
Some of my difficulty was because our gateway is running inside a fire-walled private network, and my designer session is outside that network.
Is there a better way to do this? In particular I would like to keep “Force Secure Redirect” enabled.
Oof. There’s just a straight up bug in the reporting library that HTTPS urls will never even be attempted. I’ll file a ticket (and @justin.brzozoski, sorry we/I never saw your original post )
As a sort of workaround as of 8.1.16 you can use binary data in a report parameter, so you could fetch your images separately and pass them into the report. Far from ideal, but would make this easier I think.
Doesn’t seem like it was fixed. I was able to display images on the Perspective image component via web dev script, but when I used it on the image component on the report, it did not show anything.
)