Re: [squid-users] 301 Moved Permanently: bug?

What did Squid receive from the web server?

Did the web server close the connection? (was there a FIN sent by the web
server?)

Did Squid close the connection? (was there a FIN sent by Squid?)

What I am missing in this reply stream is a reply entity following the
headers..

Note: If adding the "Proxy-Connection: close" header is the problem then the
bug is a web browser bug... but it does not look like this is the problem.

The server returning 301 is not a problem, but if the server do not return a
proper 301 message then there is a problem. My first guess based on what you
have described is a web server bug, possibly triggered by Squid.

Regards
Henrik

Florin Andrei wrote:
> I think i stumbled over a bug in squid-2.4, but i'm not sure.
>
> - proxy: Squid/2.4.STABLE2 on Irix
> - browser: IE 6.0 on WinME
> - webserver: IIS 5.0 (i think it's on NT)
>
> I'm trying to troubleshoot a Web application. When the users go to the
> website directly, everything's fine. When they go through the proxy, it
> doesn't work, it gets stuck at some point.
>
> I watched the traffic with Ethereal in both cases.
>
> A) When the browser goes directly, everything's fine, of course.
> 1. The browser asks for server/script?params
> 2. The webserver says "HTTP/1.1 301 Moved Permanently to
> server.domain.sgi.com/script?params"
> 3. The browser asks for server.domain.sgi.com/script?params
> 4. The webserver returns the page. Everyone's happy.
>
> B) When it goes through the proxy, this is what happens:
> 1. The browser asks for server/script?params
> 2. The proxy talks to the webserver, and then replies back to the
> browser: "HTTP/1.0 301 Moved Permanently to
> server.domain.sgi.com/script?params" but also it's adding
> "Proxy-Connection: close"
> 3. After like 0.1 seconds, the workstation sends a couple of ACKs to the
> proxy
> 4. After 9 more seconds, the workstation sends a couple of RSTs to the
> proxy.
>
> This is the last useful packet (from proxy to browser):
>
> HTTP/1.0 301 Moved Permanently
> Server: Microsoft-IIS/5.0
> Date: Thu, 11 Jul 2002 22:17:45 GMT
> Location: http://XXXXXXXXXXXXXXX.sgi.com:80/XXXXX/XXXXX.XXX?SWECmd=Start
> X-Cache: MISS from XXXXproxy.XXXXXXXX.sgi.com
> X-Cache-Lookup: MISS from XXXXproxy.XXXXXXXX.sgi.com:8080
> Proxy-Connection: close
>
> I believe the problem appears because the proxy closes the connection
> (but perhaps i'm wrong).
> Or perhaps it's a bug in IE?
>
> I enabled "use HTTP 1.1 through proxy connections" in the browser (and i
> see in the sniffer the requests made in v1.1), but it doesn't make any
> difference: the proxy still answers in HTTP/1.0 with the same answer.
>
> I run my proxies with persistent connections enabled for clients and
> servers (if that makes a difference).
>
> I cannot modify the website to avoid the 301 code.
>
> Suggestions?

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