[jira] [Commented] (TS-1106) redirect map generates multiple Via: header entries.

["Leif Hedstrom (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TS-1106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13606873#comment-13606873 ] 

Leif Hedstrom commented on TS-1106:
-----------------------------------

Debugged a little more on this. It looks like it fails the remap phase, calls HttpTransact::build_error_response(), then somehow figures out it's a "redirect" map, and calls it again, but this time with the redirect information.

The first call ends up being:
{code}
#3  HttpTransact::build_error_response (s=s@entry=0x7fffed9e42f8, status_code=status_code@entry=HTTP_STATUS_NOT_FOUND, reason_phrase_or_null=<optimized out>, error_body_type=0x6b6a52 "urlrouting#no_mapping", format=0x6b9920 "Your requested URL was not found.") at ../../../../proxy/http/HttpTransact.cc:8103
{code}

whereas the second time it is:
{
#3  HttpTransact::build_error_response (s=s@entry=0x7fffed9e42f8, status_code=status_code@entry=HTTP_STATUS_MOVED_PERMANENTLY, reason_phrase_or_null=reason_phrase_or_null@entry=0x6cbec6 "Redirect", error_body_type=error_body_type@entry=0x6b69d3 "redirect#moved_permanently", format=format@entry=0x6b69b8 "%s <a href=\"%s\">%s</a>. %s") at ../../../../proxy/http/HttpTransact.cc:8103
}


I asked Bryan Call to verity with the older Yahoo version, and it looks to behave the same. The end result is correct (we do the right redirect), but it seems odd to call the build_error_response twice?
                
> redirect map generates multiple Via: header entries.
> ----------------------------------------------------
>
>                 Key: TS-1106
>                 URL: https://issues.apache.org/jira/browse/TS-1106
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: HTTP
>    Affects Versions: 3.1.2
>            Reporter: Leif Hedstrom
>            Assignee: Leif Hedstrom
>             Fix For: 3.3.3
>
>
> It seems using the redirect rule in remap.config, ends up duplicating the entry in the Via: header, e.g.
> {code}
> Via: http/1.1 kramer.ogre.com (ApacheTrafficServer/3.1.3-unstable [u c s f p eS:tNc  i p s ]), http/1.1 kramer.ogre.com (ApacheTrafficServer/3.1.3-unstable [u c s f p eS:tNc  i p s ])
> {code}
> I'm not sure why this happens, if it's duplicating it, or if it's going through the SM twice. I know i'm not proxying twice through the box.

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