Mod_Perl Can't See Files in /Tmp

How can I provide a temp file download using mod_perl and CGI::Application?

You shouldn't need to mess with STDOUT; CGI-App should handle that properly for you under the hood. You'll also may need to close the filehandle before you try to send the data.

It looks like you're not setting a proper content type for the Excel data, though. For anything other than text/html, you'll need to set it manually. Try something like this:

sub export_list {
    my $self = shift;

    my $str;
    open my $fh, '>', \$str or die "Can't open to var: $!";
    my $workbook = Spreadsheet::WriteExcel->new($fh);
    my $worksheet = $workbook->add_worksheet();

    $worksheet->write_col(0,0, ['some','data','here']);

    $workbook->close;
    close $fh;

    warn $str;

    $self->header_add( -type => 'application/vnd.ms-excel' );
    return $str;

}

You may also be interested in CGI::Application::Plugin::Stream

Write a simple mod_perl handler

This is just an example. You need to create the files yourself. (You'll see your example refers to "file:MyApache2/CurrentTime.pm").

mkdir -p example-lib/MyApache2
touch example-lib/MyApache2/CurrentTime.pm

Then paste the contents from the example into the file you just created.

In order for this to run under mod_perl, you'll also have to let the server know where your MyApache2 is located. You should be able to add something like this to your Apache config:

PerlSwitches -I/path/to/example-lib

Don't forget to restart Apache before you test this out.

How to install mod_perl 2.0.9 in Apache 2.4 on OS X Yosemite?

mod_perl 2.0.8 (latest stable) won't cut it--it's unaware of the deprecation of MPM_NAME in apache 2.4.x
Download the latest dev via svn:

svn checkout https://svn.apache.org/repos/asf/perl/modperl/trunk/ mod_perl-2.0

The Changes file lists this version as 2.0.9-dev

Xcode 6.01 won't cut it--it's apache headers will make mod_perl think you're running apache 2.2.26; get Xcode 6.1 (released Oct 20).

Makefile.PL will still have trouble finding ap_release.h (to get your apache version). It's here:

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/apache2/ap_release.h

Makefile.PL will look by default in /usr/include/apache2. It will also look for apr headers in /usr/include/apr-1 because the Yosemite-included /usr/bin/apr-1-config will tell it that's where they are (they're actually in /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/apr-1 )

/usr/bin/apr-1-config --includedir
/usr/include/apr-1

I tried setting env vars MP_AP_PREFIX and MP_APR_CONFIG appropriately, but those values seemed to be ignored. So I made things easier on myself:

$ sudo ln -s /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/apache2 /usr/include/apache2

$ sudo ln -s /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/apr-1 /usr/include/apr-1

(thanks to Sean Coyne) Per Jason A. Crome's blog post
"llvm/clang on OS X defaults to C99, but mod_perl expects the 89 "standard"

$ perl Makefile.PL MP_CCOPTS=-std=gnu89; make ; sudo make install

The LoadModule line for mod_perl has been removed from Yosemite's /etc/apache2/httpd.conf file.

Add

LoadModule perl_module libexec/apache2/mod_perl.so

to the module section of /etc/apache2/httpd.conf

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