Gancho Tenev created TS-3740:
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Summary: header_rewrite plugin: set-redirect doesn't work with
SEND_RESPONSE_HDR_HOOK
Key: TS-3740
URL: https://issues.apache.org/jira/browse/TS-3740
Project: Traffic Server
Issue Type: Bug
Components: Plugins
Reporter: Gancho Tenev
DESCRIPTION:
ATS header_rewrite plugin set-redirect operation doesn't work with
SEND_RESPONSE_HDR_HOOK. Please see the debugging notes below for more info.
HOW TO REPRODUCE:
Here is a sample plugin configuration files that reproduce the problem
$ cat /opt/ats/etc/trafficserver/remap.config
map http://p1 http://h1:8001 \
@plugin=header_rewrite.so
@pparam=/opt/ats/etc/trafficserver/header_rewrite.config
$ cat /opt/ats/etc/trafficserver/header_rewrite.config
cond %{SEND_RESPONSE_HDR_HOOK}
cond %{STATUS} =502
set-redirect 302 http://p0/%{PATH} [QSA]
DEBUGGING NOTES:
Both conditions in the header_rewrite.config are evaluated correctly but
set-redirect has no effect and the response to the UA is not modified as
expected. After some debugging it turned out that if the set-redirect
(OperatorSetDestination::exec) is not called from the remap plugin it has no
effect. The header_rewrite plugin creates a continuation to be called from
SEND_RESPONSE_HDR_HOOK (TSHttpHookAdd()). OperatorSetDestination::exec doesn't
have code to handle the case when the set-redirect operation is _not_ called
directly from the remap plugin (TSRemapDoRemap()).
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