Re: [PATCH] gitweb: fix wrong base URL when non-root DirectoryIndex

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On Fri, 13 Feb 2009, Giuseppe Bilotta wrote:

> CGI::url() has some issues when rebuilding the script URL if the script
> is a DirectoryIndex.
> 
> One of these issue is the inability to strip PATH_INFO, which is why we
> had to do it ourselves.
> 
> Another issue is that the resulting URL cannot be used for the <base>
> tag: it works if we're the DirectoryIndex at the root level, but not
> otherwise.
> 
> We fix this by building the proper base URL ourselves, and improve the
> documentation about the need to strip PATH_INFO manually while we're at
> it.
> 
> Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@xxxxxxxxx>

Sounds good. I don't use gitweb as DirectoryIndex myself, but
Acked-by: Jakub Narebski <jnareb@xxxxxxxxx>

> ---
>  gitweb/gitweb.perl |   16 ++++++++++++----
>  1 files changed, 12 insertions(+), 4 deletions(-)
> 
> diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
> index c2c8080..48cfd5f 100755
> --- a/gitweb/gitweb.perl
> +++ b/gitweb/gitweb.perl
> @@ -27,15 +27,23 @@ our $version = "++GIT_VERSION++";
>  our $my_url = $cgi->url();
>  our $my_uri = $cgi->url(-absolute => 1);
>  
> -# if we're called with PATH_INFO, we have to strip that
> -# from the URL to find our real URL
> -# we make $path_info global because it's also used later on
> +# When the script is used as DirectoryIndex, the URL does not contain the name
> +# of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
> +# have to do it ourselves. We make $path_info global because it's also used
> +# later on
>  our $path_info = $ENV{"PATH_INFO"};
>  if ($path_info) {
>  	$my_url =~ s,\Q$path_info\E$,,;
>  	$my_uri =~ s,\Q$path_info\E$,,;
>  }
>  
> +# Another issue with the script being the DirectoryIndex is that the resulting
> +# $my_url data is not the full script URL: this is good, because we want
> +# generated links to keep implying the script name if it wasn't explicitly
> +# indicated in the URL we're handling, but it means that $my_url cannot be used
> +# as base URL. Therefore, we have to build the base URL ourselves:
> +our $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
> +
>  # core git executable to use
>  # this can just be "git" if your webserver has a sensible PATH
>  our $GIT = "++GIT_BINDIR++/git";
> @@ -2908,7 +2916,7 @@ EOF
>  	# the stylesheet, favicon etc urls won't work correctly with path_info
>  	# unless we set the appropriate base URL
>  	if ($ENV{'PATH_INFO'}) {
> -		print "<base href=\"".esc_url($my_url)."\" />\n";
> +		print "<base href=\"".esc_url($base_url)."\" />\n";
>  	}
>  	# print out each stylesheet that exist, providing backwards capability
>  	# for those people who defined $stylesheet in a config file
> -- 
> 1.5.6.5
> 
> 

-- 
Jakub Narebski
Poland
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