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https://issues.apache.org/jira/browse/TS-3469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14386831#comment-14386831
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Alan M. Carroll edited comment on TS-3469 at 3/30/15 3:10 PM:
--------------------------------------------------------------
Based on experiments I've done if you have redirection enabled then
READ_RESPONSE_HDR_HOOK can be called multiple times in a transaction. Once for
the initial (301) response and then again for the subsequent (200) response (or
more, if you bounce around for a while). Set the following values in
{{records.config}}
{code}
proxy.config.http.redirection_enabled INT 1
proxy.config.http.number_of_redirections INT 3
{code}
One way to see this is to set up an HTTP server with some files and add the
following configuration line
{code}
RedirectMatch 301 redirect-(.*) http://fqdn.com/$1
{code}
where {{fqdn.com}} is the name of your webserver. This means that if
{{http://fqdn.com/bob.html}} is a valid URL, so is
{{http://fqdn.com/redirect-bob.html}} which will return a 301 redirect to
bob.html. You can test this with curl as well as
{code}
curl --location http://fqdn.com/redirect-bob.html
{code}
was (Author: amc):
Based on experiments I've done if you have redirection enabled then
READ_RESPONSE_HDR_HOOK can be called multiple times in a transaction. Once for
the initial (301) response and then again for the subsequent (200) response (or
more, if you bounce around for a while). Set the following values in
{{records.config}}
{code}
proxy.config.http.redirection_enabled INT 1
proxy.config.http.number_of_redirections INT 3
{code}
One way to see this is to set up an HTTP server with some files and add the
following configuration line
{code}
RedirectMatch 301 redirect-(.*) http://fqdn.com/$1
{code}
where {{fqdn.com}} is the name of your webserver. This means that if
{{http://fqdn.com/bob.html}} is a valid URL, so is
{{http://fqdn.com/redirect-bob.html}} which will return a 301 redirect to
bob.html. You can test this with curl as well as
curl --location http://fqdn.com/redirect-bob.html
> Update plugin docs to reflect multiple calls to SEND_RESPONSE_HDR
> -----------------------------------------------------------------
>
> Key: TS-3469
> URL: https://issues.apache.org/jira/browse/TS-3469
> Project: Traffic Server
> Issue Type: Improvement
> Components: Documentation
> Reporter: Scott Beardsley
> Assignee: Alan M. Carroll
> Fix For: sometime
>
>
> We ran into a problem where SEND_RESPONSE_HDR was being called multiple times
> leading to a crash. The docs are unclear on this point so we should update
> them to reflect this intermittent case.
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