Re: [Pi3web-users] External redirection

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Hello Dharmesh,

external redirection can be done in several different ways :
- by embedding the related tag in a (static) HTML page (this is a pure
  browser mechanism, the server isn't involved at all), e.g.:
  <head>
   <meta http-equiv="refresh" content="0; URL=http://foo.org/bar/">
 </head>

- in Pi3Web 2.0.2 using the Redirection PathMapper (administration),
  this results, e.g., in the following configuration directive :
  Mapping RedirectMapper From="/pi3site/" \
 To="http://pi3web.sourceforge.net/"

- in the configuration by adding a flexible handler, which 
(conditionally) adds
   the correct response header in order to trigger redirection 
(configuration).

- using one of the available features to generate dynamic contents, e.g.
  CGI, SSI, PHP, ISAPI, ASP, Servlet, JSP, PSP (programming),
  e.g. as PHP page :
  <? header("Location: http://foo.org/bar"); ?>

Some Remarks :
In each case, the response of the server should look like :

HTTP/1.0 302 Permanently Moved NL
Location: http://foo.org/bar NL
NL NL

- 'NL' indicates a new line. You must not care about it, if the headers
   are generated by the respective server functions (exception: NPH-CGI
   programs - i.e. 'Non Parsed Headers', these are produced by CGI's, which
   write the complete response message, including the status line and 
all headers
   into the output stream).

- The URL to which the browser shall be re-located must be complete,
   because the redirection is done by the browser and not within the server
   ( schema://[host.]domain.extension/path[/resource?params] )

--
regards,
Holger

Dharmesh Shah schrieb:

>
> Hello Holger,
>
> Thanks for the feedback.
> I will explore using - SF_NOTIFY_PREPROC_HEADERS.
> Any hints/leads for external (via the browser, location of the target 
> e.g. at another web server) redirect.
>
> Thanks,
>
> Dharmesh
>
> ----Original Message Follows----
> From: zi...@t-... (Holger Zimmermann)
> To: Dharmesh Shah <for...@ho...>
> CC: pi3...@li...
> Subject: Re: [Pi3web-users] Help on ISAPI Filter for SF_NOTIFY_URL_NOTIFY
> Date: Wed, 25 Feb 2004 19:44:41 +0100
>
> Hello Dharmesh,
>
> do you want to perform an internal (URL with physical location of the 
> target within the server) or an external (via the browser, location of 
> the target e.g. at another web server) redirect? For the first case 
> refer to this link: http://www.codeproject.com/isapi/isapiredirector.asp
>
> In this MFC-example they catch SF_NOTIFY_PREPROC_HEADERS events and 
> simply change the URL. This is done, before the server processes the 
> headers, i.e. maps the URL to a physical resource path.
>
> (I don't know, if the following is necessary, but in order to get 
> SF_NOTIFY_URL_MAP events you must invoke the filter DLL prior the 
> Pi3Web handler object, which completes the mapping phase, this is per 
> default the 'Start' object. Or you must supress the completion of the 
> 'Mapping' phase by the handlers invoked prior the filter.
> This is the way, how Pi3Web handles processing of the separate request 
> phases: Each handler configured in the server logic object will be 
> called, until one sets the status of the processing of the phase to 
> 'completed'.)
> -- 
> regards,
> Holger
>
> Dharmesh Shah schrieb:
>
>> Hello,
>>
>> I have been struggling for past one day to setup features.pi3 to work 
>> with my custom ISAPI filter.
>>
>> I have been successfuly in getting filter events for 
>> SF_NOTIFY_PREPROC_HEADERS.
>>
>> But have not succeeded in getting SF_NOTIFY_URL_MAP events.
>>
>> What I need to do is redirect the request to different page 
>> (different URL) in selected cases.
>>
>> Help on this will be greatly appreciated.
>>
>> Thanks,
>>
>> Dharmesh
>>
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