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From s...@apache.org
Subject cvs commit: modperl-docs/src/docs/2.0/user/handlers http.pod
Date Wed, 09 Jun 2004 17:06:55 GMT
stas        2004/06/09 10:06:55

  Modified:    src/docs/2.0/user/handlers http.pod
  Log:
  fill in the PerlMapToStorageHandler gap
  
  Revision  Changes    Path
  1.35      +67 -20    modperl-docs/src/docs/2.0/user/handlers/http.pod
  
  Index: http.pod
  ===================================================================
  RCS file: /home/cvs/modperl-docs/src/docs/2.0/user/handlers/http.pod,v
  retrieving revision 1.34
  retrieving revision 1.35
  diff -u -u -r1.34 -r1.35
  --- http.pod	9 Jun 2004 16:17:42 -0000	1.34
  +++ http.pod	9 Jun 2004 17:06:55 -0000	1.35
  @@ -238,16 +238,14 @@
   
   =head2 PerlTransHandler
   
  -The I<translate> phase is used to perform the translation of a
  -request's URI into an corresponding filename. If no custom handler is
  -provided, the server's standard translation rules (e.g., C<Alias>
  -directives, mod_rewrite, etc.) will continue to be used. A
  -C<PerlTransHandler> handler can alter the default translation
  -mechanism or completely override it.
  -
  -In addition to doing the translation, this stage can be used to modify
  -the URI itself and the request method. This is also a good place to
  -register new handlers for the following phases based on the URI.
  +The I<translate> phase is used to perform the manipulation of a
  +request's URI. If no custom handler is provided, the server's standard
  +translation rules (e.g., C<Alias> directives, mod_rewrite, etc.) will
  +be used. A C<PerlTransHandler> handler can alter the default
  +translation mechanism or completely override it. This is also a good
  +place to register new handlers for the following phases based on the
  +URI. C<L<PerlMapToStorageHandler|/PerlMapToStorageHandler>> is to be
  +used to override the URI to filename translation.
   
   This phase is of type
   C<L<RUN_FIRST|docs::2.0::user::handlers::intro/item_RUN_FIRST>>.
  @@ -316,17 +314,11 @@
   =head2 PerlMapToStorageHandler
   
   The I<map_to_storage> phase is used to perform the translation of a
  -
  -
  -
  -
   request's URI into an corresponding filename. If no custom handler is
  -provided, the server's standard translation rules (e.g., C<Alias>
  -directives, mod_rewrite, etc.) will continue to be used. A
  -C<PerlTransHandler> handler can alter the default translation
  -mechanism or completely override it.
  -
  -META: add something here
  +provided, the server will try to walk the filesystem trying to find
  +what file or directory corresponds to the request's URI. Since usually
  +mod_perl handler don't have corresponding files on the filesystem, you
  +will want to shortcut this phase and save quite a few CPU cycles.
   
   This phase is of type
   C<L<RUN_FIRST|docs::2.0::user::handlers::intro/item_RUN_FIRST>>.
  @@ -335,6 +327,61 @@
   C<L<SRV|docs::2.0::user::config::config/item_SRV>>, because at this
   phase the request has not yet been associated with a particular
   filename or directory.
  +
  +For example if you don't want Apache to try to attempt to translate
  +URI into a filename, just add a handler:
  +
  +  PerlMapToStorageHandler MyApache::NoTranslation
  +
  +using the following code:
  +
  +  file:MyApache/NoTranslation.pm
  +  ------------------------------
  +  package MyApache::NoTranslation;
  +  
  +  use strict;
  +  use warnings FATAL => 'all';
  +  
  +  use Apache::Const -compile => qw(OK);
  +  
  +  sub handler {
  +      my $r = shift;
  +  
  +      # skip ap_directory_walk stat() calls
  +      return Apache::OK;
  +  }
  +  1;
  +
  +Apache also uses this phase to handle C<TRACE> requests. So if you
  +shortcut it, C<TRACE> calls will be not handled. In case you need to
  +handle such, you may rewrite it as:
  +
  +  file:MyApache/NoTranslation2.pm
  +  -------------------------------
  +  package MyApache::NoTranslation2;
  +  
  +  use strict;
  +  use warnings FATAL => 'all';
  +  
  +  use Apache::RequestRec ();
  +
  +  use Apache::Const -compile => qw(DECLINED OK M_TRACE);
  +  
  +  sub handler {
  +      my $r = shift;
  +  
  +      return Apache::DECLINED if $r->method_number == Apache::M_TRACE;
  +  
  +      # skip ap_directory_walk stat() calls
  +      return Apache::OK;
  +  }
  +  1;
  +
  +Another way to prevent the core translation is to set
  +C<$r-E<gt>filename()> to some value, which can also be done in the
  +C<L<PerlTransHandler|/PerlTransHandler>>, if you are already using it.
  +
  +
   
   
   
  
  
  

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