For posterity, Igor's solution is what worked for me - thanks!
Specifically:
proxy_redirect http://host.com:88/ http://host.com/;
On Sun, Nov 18, 2012 at 9:21 PM, Igor Cicimov <icicimov@xxxxxxxxx> wrote:
>
>
>
> On Mon, Nov 19, 2012 at 12:56 PM, Yang Zhang <yanghatespam@xxxxxxxxx> wrote:
>>
>> (The app server is this:
>> http://gitit.net/README#proxying-to-httpmysite.comwiki)
>>
>> On Sun, Nov 18, 2012 at 5:55 PM, Yang Zhang <yanghatespam@xxxxxxxxx>
>> wrote:
>> > This is not an option because the point of my using the proxy in this
>> > case is that I need to rewrite the URLs and content (with
>> > mod_proxy_html). The app server hosts at / and I need to translate it
>> > to a subdirectory /sub.
>> >
>> > On Sun, Nov 18, 2012 at 5:53 PM, Igor Cicimov <icicimov@xxxxxxxxx>
>> > wrote:
>> >>
>> >>
>> >>
>> >> On Mon, Nov 19, 2012 at 12:38 PM, Yang Zhang <yanghatespam@xxxxxxxxx>
>> >> wrote:
>> >>>
>> >>> On Sun, Nov 18, 2012 at 3:21 PM, Igor Cicimov <icicimov@xxxxxxxxx>
>> >>> wrote:
>> >>> >
>> >>> > On Mon, Nov 19, 2012 at 9:48 AM, Yang Zhang <yanghatespam@xxxxxxxxx>
>> >>> > wrote:
>> >>> >>
>> >>> >> I have: nginx (port 80) reverse-proxying to apache2 (port 88)
>> >>> >> reverse-proxying to a web app (port 5001).
>> >>> >>
>> >>> >> However, when the web app responds with a redirect like `Location:
>> >>> >> /foo`, apache2 rewrites this into `Location:
>> >>> >> http://host.com:88/sub/foo`,
>> >>> >
>> >>> >
>> >>> > Yes that's what reverse proxy is all about, it rewrites the Location
>> >>> > header
>> >>> > using ProxyPassReverseso it doesn't get bypassed in case of backend
>> >>> > server
>> >>> > redirection.
>> >>>
>> >>> nginx doesn't do the same rewrite from host.com:88 to host.com - I'd
>> >>> also be fine with a solution where nginx does this rewrite as well.
>> >>>
>> >>> >
>> >>> >> even though port 88 is publicly
>> >>> >> inaccessible. I'd like it to just redirect to the relative URL
>> >>> >> `Location: /sub/foo`.
>> >>> >
>> >>> >
>> >>> > So use a redirect then. Looks like reverse proxy is not applicable
>> >>> > for
>> >>> > your
>> >>> > user case.
>> >>>
>> >>> What specifically do you mean when you suggest to "use a redirect"?
>> >>> Are you suggesting redirecting host.com:88 to host.com? That's not
>> >>> possible because port 88 is not (and should not be) publicly
>> >>> reachable.
>> >>
>> >>
>> >> I meant redirecting /notes/ to the backend using [P] flag if you like
>> >> instead of proxying it.
>> >>
>> >>>
>> >>> >
>> >>> >>
>> >>> >>
>> >>> >> Any ideas?
>> >>> >>
>> >>> >> My apache config (using mod_proxy_http, mod_proxy_html,
>> >>> >> mod_substitute):
>> >>> >>
>> >>> >> <Location /notes/>
>> >>> >> Allow from all
>> >>> >> ProxyPass http://127.0.0.1:5001/
>> >>> >> SetOutputFilter proxy-html
>> >>> >> ProxyPassReverse /
>> >>> >> ProxyHTMLURLMap / /notes/
>> >>> >> RequestHeader unset Accept-Encoding
>> >>> >> AddOutputFilterByType SUBSTITUTE application/atom+xml
>> >>> >> Substitute "s|127.0.0.1:5001|host.com/notes|"
>> >>> >> </Location>
>> >>> >>
>> >>> >> Thanks.
>> >>> >>
>> >>> >>
>> >>> >> ---------------------------------------------------------------------
>> >>> >> To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx
>> >>> >> For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
>> >>> >>
>> >>> >
>> >>>
>> >>>
>> >>>
>> >>> --
>> >>> Yang Zhang
>> >>> http://yz.mit.edu/
>> >>>
>> >>> ---------------------------------------------------------------------
>> >>> To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx
>> >>> For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
>> >>>
>> >>
>> >
>> >
>> >
>> > --
>> > Yang Zhang
>> > http://yz.mit.edu/
>>
>>
>>
>> --
>> Yang Zhang
>> http://yz.mit.edu/
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx
>> For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
>>
>
> Can't you solve this in nginx? Rewrite the Location header set by apache
> using proxy_redirect?
>
--
Yang Zhang
http://yz.mit.edu/
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