trim on; not worked

[pashunchik]

Ⅰ. Issue Description

trim on; not worked

Ⅱ. Describe what happened

all comments is present in html source

    <!-- Piwik -->
  <!--piwik.js-->
<!-- End Piwik Code -->

Ⅵ. Environment:

Tengine version: Tengine/3.1.0
nginx version: nginx/1.24.0

[Liang]

Pls. refer to doc Ngx_http_trim_filter specifically.

E.g.,

Tengine conf:

index.html of upstream with comments:

The comments was removed from the response of upstream by the tengine:

[Liang]

Tengine conf:

The comments was saved from the response of upstream by the tengine: