Bug ID 899097: Existence of rewrite profile with HTTP profile response chunking mode 'sustain' always triggers client-side chunking

Last Modified: Jul 22, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP Install/Upgrade, LTM(all modules)

Known Affected Versions:
15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.0.1.3, 15.0.1.4, 15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4

Opened: Apr 15, 2020
Severity: 4-Minor

Symptoms

When using the rewrite profile, unchunked server responses where content-type is not text/html or text/css also gets converted to chunked encoding in client-side. Also, the server response is missing a message-body (no content-type/content-length). The client device receives 'Transfer-Encoding: chunked' in the message-header and receives a chunked body if the origin response has a message-body. The client receives a zero-length chunk if the origin response has no message-body. Prior to BIG-IP version 15, chunking happens only if origin server response has content-type header set to either text/html or text/css.

Impact

End users may notice a change in chunking behavior after upgrading from prior release.

Conditions

- HTTP profile response chunking is set to 'sustain'. - The virtual server has rewrite profile attached. - Server response has content-type set not to text/html or text/css OR no content-type header.

Workaround

Use response chunking mode 'unchunk'

Fix Information

None

Behavior Change