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From Michael Böckling <Michael.Boeckl...@dmc.de>
Subject RE: POST data lost when switching URL using mod_rewrite and mod_jk
Date Thu, 06 Sep 2007 15:15:08 GMT
Ok, that makes it clear to me.
Thanks for the exhaustive reply!

Btw., I didn't configure the servers, I'm just trying to get my forms data through and understand
as much as possible. :-)

So I switched to GET, but again, I ran into issues, this time it is character-encoding related.
The Tomcats all have URIEncoding="UTF-8" set, and it works whithout the rewrite-induced redirect.

But when redirect is used, the following happens:

The parameter "führung" becomes "f%C3%BChrung" in my JSPs. I did "AddDefaultEncoding UTF-8"
in my Apache config, that doesn't help. Is there a configuration option for mod_rewrite or
mod_jk that I have to set to make it work? I tried the "ForwardURIxxx" options on my mod_jk,
but they didn't help. Any Ideas?

Thanks a lot for the help so far!

Regards,


Michael



> -----Original Message-----
> From: Rainer Jung [mailto:rainer.jung@kippdata.de]
> Sent: Thursday, September 06, 2007 4:35 PM
> To: Tomcat Users List
> Subject: Re: POST data lost when switching URL using mod_rewrite and
> mod_jk
> 
> 
> Example from
> 
> http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
> 
> 10.3.2 301 Moved Permanently
> 
> The requested resource has been assigned a new permanent URI and any 
> future references to this resource SHOULD use one of the 
> returned URIs. 
> Clients with link editing capabilities ought to automatically re-link 
> references to the Request-URI to one or more of the new references 
> returned by the server, where possible. This response is cacheable 
> unless indicated otherwise.
> 
> The new permanent URI SHOULD be given by the Location field in the 
> response. Unless the request method was HEAD, the entity of 
> the response 
> SHOULD contain a short hypertext note with a hyperlink to the 
> new URI(s).
> 
> If the 301 status code is received in response to a request 
> other than 
> GET or HEAD, the user agent MUST NOT automatically redirect 
> the request 
> unless it can be confirmed by the user, since this might change the 
> conditions under which the request was issued.
> 
>        Note: When automatically redirecting a POST request after
>        receiving a 301 status code, some existing HTTP/1.0 user agents
>        will erroneously change it into a GET request.
> 
> So if you are using HTTp Redirect, check your Apache access log. It's 
> likely you will notice, that the browser switched from a POST 
> to a GET 
> during the redirect and the POST Body isn't send by the 
> Browser. Nothing 
> we could do in this case on the server side.
> 
> You should try to identify a GET which sits before the POST in your 
> clickstream and do the redirect already there (like e.g. when the 
> browser tries to retrieve the empty form before it tries to send the 
> contents).
> 
> Regards,
> 
> Rainer
> 
> Michael Böckling wrote:
> > Hi folks!
> > 
> > I Have the following setup:
> > 
> > Apache/2.2.4 
> > mod_ssl/2.2.4 
> > mod_jk/1.2.25
> > mod_rewrite (?)
> > Apache Tomcat 5.5.23
> > 
> > Browser ==> Apache + mod_rewrite ==> mod_jk ==> Tomcat
> > 
> > 
> > This is a Linux machine, and mod_rewrite is used to switch 
> to SSL on certain URLs.
> > 
> > Problem: the POST data is lost whenever a form on a http 
> page sends data to a page that gets its URL rewritten to https.
> > This goes as folllows:
> > 
> > http page => form post to http url => rewrite url to https, 
> switch to SSL => display https url
> > 
> > No data arrives when using POST!
> > I know there is a bug that limits the maximum post size to 
> x KB, but in my case, the post data is a just a few text fields.
> > Any idea as to why this happens?
> > 
> > Regards,
> > 
> > 
> > Michael
> 
> ---------------------------------------------------------------------
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