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From Michael McLagan <mmcla...@invlogic.com>
Subject [mp2] $req->main->is_initial_req == 0 ???
Date Mon, 03 Apr 2006 21:18:19 GMT
-------------8<---------- Start Bug Report ------------8<----------
1. Problem Description:

    I'm not sure if this is my interpretation of the documentation or a
    real problem with the code.  The documentation says:

    >   If the current request is a sub-request, this method returns a
    >   blessed reference to the main request structure. If the current
    >   request is the main request, then this method returns undef.
    >
    >   To figure out whether you are inside a main request or a
    >   sub-request/internal redirect, use $r->is_initial_req.

    "Main" to me says the one that was received by the server over the
    internet -- from the client -- ie no matter how many requests deep
    we are at any given point, main() always returns the top most item
    on the pile.  In that case, checking main->is_initial_request should
    always be 1 and looking at the uri() should always be what the server
    got from the client.

    If that's the correct interpretation of what the documentation says,
    then I suspect there's a problem within the code as outlined in the
    message subject -- main() isn't really main!

    I found this particular discrepancy with a structure similar to the
    following:

    /file1.html:

      <BODY>
      <!--#include virtual="/file2.html" -->
      </BODY>

    /file2.html

       <BODY>
       <!--#include virtual="/bin/form" -->
       </BODY>

    /bin/form

       [does a bunch of stuff and eventually calls $self->request_uri, see below]

    Page.pm:

    # Page->request_uri()
    sub request_uri ($)
    {
       my ($self) = shift;

    print '<!-- is_initial ' . $self->request->is_initial_req . " -->\n";
    print '<!-- uri ' . $self->request->uri . " -->\n";

    if ($self->request->main)
    {
    print '<!-- main->is_initial ' . $self->request->main->is_initial_req .
" -->\n";
    print '<!-- main->uri ' . $self->request->main->uri . " -->\n";
    }

    if ($self->request->main->main)
    {
    print '<!-- main->main->is_initial ' . $self->request->main->main->is_initial_req
. " -->\n";
    print '<!-- main->main->uri ' . $self->request->main->main->uri .
" -->\n";
    }

       my ($req) = $self->request;

       # Keep going backwards until you find the actual initial request.
       $req = $req->main while (!$req->is_initial_req);

    print '<!-- req->uri ' . $req->uri . " -->\n";

       return $req->uri;
    }

    The browser's HTML when accessing http://server/file1.html shows:

       <!-- is_initial 0 -->
       <!-- uri /bin/form -->
       <!-- main->is_initial 0 -->
       <!-- main->uri /file2.html -->
       <!-- main->main->is_initial 1 -->
       <!-- main->main->uri /file1.html -->
       <!-- req->uri /file1.html -->



2. Used Components and their Configuration:

*** mod_perl version 2.000002

*** using /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi/Apache2/BuildConfig.pm

*** Makefile.PL options:
   MP_APR_CONFIG  => /usr/bin/apr-1-config
   MP_APR_LIB     => aprext
   MP_APXS        => /usr/sbin/apxs
   MP_COMPAT_1X   => 1
   MP_GENERATE_XS => 1
   MP_LIBNAME     => mod_perl
   MP_USE_DSO     => 1


*** The httpd binary was not found


*** (apr|apu)-config linking info

  -laprutil-1 -lldap -llber -ldb-4.3 -lexpat
  -lapr-1  -lpthread -ldl



*** /usr/bin/perl -V
Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
   Platform:
     osname=linux, osvers=2.6.9-22.18.bz155725.elsmp, archname=i386-linux-thread-multi
     uname='linux hs20-bc1-6.build.redhat.com 2.6.9-22.18.bz155725.elsmp #1 smp thu nov 17
15:34:08 est 2005 i686 i686 i386 gnulinux '
     config_args='-des -Doptimize=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables
-Dversion=5.8.8 -Dmyhostname=localhost 
-Dperladmin=root@localhost -Dcc=gcc -Dcf_by=Red Hat, Inc. -Dinstallprefix=/usr -Dprefix=/usr
-Darchname=i386-linux -Dvendorprefix=/usr -Dsiteprefix=/usr -Duseshrplib -Dusethreads -Duseithreads
-Duselargefiles -Dd_dosuid -Dd_semctl_semun -Di_db -Ui_ndbm 
-Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm -Duseperlio -Dinstallusrbinperl=n -Ubincompat5005
-Uversiononly -Dpager=/usr/bin/less -isr -Dd_gethostent_r_proto -Ud_endhostent_r_proto -Ud_sethostent_r_proto
-Ud_endprotoent_r_proto -Ud_setprotoent_r_proto 
-Ud_endservent_r_proto -Ud_setservent_r_proto -Dinc_version_list=5.8.7 5.8.6 5.8.5 5.8.4 5.8.3
-Dscriptdir=/usr/bin'
     hint=recommended, useposix=true, d_sigaction=define
     usethreads=define use5005threads=undef useithreads=define usemultiplicity=define
     useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
     use64bitint=undef use64bitall=undef uselongdouble=undef
     usemymalloc=n, bincompat5005=undef
   Compiler:
     cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -Wdeclaration-after-statement
-I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
     optimize='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4
-m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables',
     cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe -Wdeclaration-after-statement
-I/usr/local/include -I/usr/include/gdbm'
     ccversion='', gccversion='4.1.0 20060228 (Red Hat 4.1.0-1)', gccosandvers=''
     intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
     d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
     ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
     alignbytes=4, prototype=define
   Linker and Libraries:
     ld='gcc', ldflags =' -L/usr/local/lib'
     libpth=/usr/local/lib /lib /usr/lib
     libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc
     perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
     libc=/lib/libc-2.3.90.so, so=so, useshrplib=true, libperl=libperl.so
     gnulibc_version='2.3.90'
   Dynamic Linking:
     dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E -Wl,-rpath,/usr/lib/perl5/5.8.8/i386-linux-thread-multi/CORE'
     cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'


Characteristics of this binary (from libperl):
   Compile-time options: MULTIPLICITY PERL_IMPLICIT_CONTEXT
                         PERL_MALLOC_WRAP USE_ITHREADS USE_LARGE_FILES
                         USE_PERLIO USE_REENTRANT_API
   Built under linux
   Compiled at Mar  1 2006 18:29:53
   %ENV:
     PERL_LWP_USE_HTTP_10="1"
   @INC:
     /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi
     /usr/lib/perl5/site_perl/5.8.7/i386-linux-thread-multi
     /usr/lib/perl5/site_perl/5.8.6/i386-linux-thread-multi
     /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi
     /usr/lib/perl5/site_perl/5.8.4/i386-linux-thread-multi
     /usr/lib/perl5/site_perl/5.8.3/i386-linux-thread-multi
     /usr/lib/perl5/site_perl/5.8.8
     /usr/lib/perl5/site_perl/5.8.7
     /usr/lib/perl5/site_perl/5.8.6
     /usr/lib/perl5/site_perl/5.8.5
     /usr/lib/perl5/site_perl/5.8.4
     /usr/lib/perl5/site_perl/5.8.3
     /usr/lib/perl5/site_perl
     /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi
     /usr/lib/perl5/vendor_perl/5.8.7/i386-linux-thread-multi
     /usr/lib/perl5/vendor_perl/5.8.6/i386-linux-thread-multi
     /usr/lib/perl5/vendor_perl/5.8.5/i386-linux-thread-multi
     /usr/lib/perl5/vendor_perl/5.8.4/i386-linux-thread-multi
     /usr/lib/perl5/vendor_perl/5.8.3/i386-linux-thread-multi
     /usr/lib/perl5/vendor_perl/5.8.8
     /usr/lib/perl5/vendor_perl/5.8.7
     /usr/lib/perl5/vendor_perl/5.8.6
     /usr/lib/perl5/vendor_perl/5.8.5
     /usr/lib/perl5/vendor_perl/5.8.4
     /usr/lib/perl5/vendor_perl/5.8.3
     /usr/lib/perl5/vendor_perl
     /usr/lib/perl5/5.8.8/i386-linux-thread-multi
     /usr/lib/perl5/5.8.8
     .

*** Packages of interest status:

Apache2            : -
Apache2::Request   : 2.07
CGI                : 3.15
ExtUtils::MakeMaker: 6.30
LWP                : 5.805
mod_perl           : -
mod_perl2          : 2.000002


3. This is the core dump trace: (if you get a core dump):

   [CORE TRACE COMES HERE]

This report was generated by /usr/bin/mp2bug on Mon Apr  3 20:55:04 2006 GMT.

-------------8<---------- End Bug Report --------------8<----------

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