Bug ID 681726: Portal Access: support for JavaScript EventSource object

Last Modified: Nov 07, 2022

Affected Product(s):
BIG-IP APM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,

Fixed In:

Opened: Sep 05, 2017

Severity: 3-Major


Most modern browsers (e.g., Google Chrome, Mozilla Firefox, and macOS Safari) support the EventSource object, which allows receipt of server-generated messages via a permanent HTTP connection. The URL used to establish this connection should be rewritten; otherwise connection may not be used.


No Portal Access support for EventSource object. Web application may not work correctly.


Web application uses EventSource object.


Use an iRule to rewrite the URL used in the EventSource object, and to disable rewriting for corresponding server responses.

Fix Information

Now the EventSource object is supported by Portal Access and can be used in Web applications.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips