JNLP Launching Difference with Chrome Browser After Update (Doc ID 2554278.1)

Last updated on JANUARY 05, 2024

Applies to:

Symptoms

JNLP launching difference in Chrome browser after upgrade from 2.3.0.2 to 2.4.0.0

This is a behavioral difference that seen between our existing NMS 2.3.0.2 system and 2.4.0.0 systems.  When using the Chrome browser in both situations, the 2.3 system (when clicking on one of the applications such as Configuration Assistant or Web Workspace from the main launch page) will go ahead and launch the JNLP application.

When clicking on similar link in the 2.4 system, Chrome prompts the user on whether to keep or discard the downloaded .jnlp file.

If the user chooses to keep it, they then have to click it again to open it. This behavior appears to be related to how the 2 links are downloaded. If I watch what happens in the Chrome developer tools network panel, the 2.3 link shows the action as canceled and never has a returned HTTP code. The initiator of that download is named as deployJava.js:1. For the 2.4 NMS links, if you watch the network panel, you will see that the request initiator is "Other" and that an HTTP 200 response is given on the return. So, something changed in the way that the JNLP files are launched.

How can we get NMS 2.4 to work in a way similar to NMS 2.3 such that the .JNLP files will be automatically launched and started when using the Chrome browser?"

EXPECTED BEHAVIOR
NMS 2.3.0.2 and 2.4 should launch the same way when using Chrome.

The issue can be reproduced at will with the following steps:
1. Start the Chrome browser
2. Navigate to a NMS 2.4 URL and select WebWorkspace (or other app within NMS)
3. Note that after selecting, a popup at the botton states "This type of file can harm yor computer. Do you want to keep .jnlp anyway? Keep Discard
4. After selecting Keep, the jnlp download is saved. You then have to select the Download to launch it.
5. Try the same process on earlier 2.3.0.2 and earlier.

Changes

Cause

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