Using HTTP::Server::Simple::CGI, how do I get the headers?

Question

Basically, my question is similar to How do I access HTTP request headers in HTTP::Server::Simple::CGI?

The answer was to use parse_headers(), but there was no example how to use it properly. I tried to use parse_headers() but I'm not getting any result, it just stops at parse_headers() like the program is stucked. I couldn't add a comment on the question above since I don't have enough rep to do so, so I created this new question.

Below is my sample code, basically the example code from CPAN just added the parse_headers:

#!/usr/bin/perl
{
package MyWebServer;

use HTTP::Server::Simple::CGI;
our @ISA = qw(HTTP::Server::Simple::CGI);
use Data::Dumper;

my %dispatch = (
    '/hello.cgi' => \&resp_hello,
    # ...
);

sub handle_request {
    my $self = shift;
    my $cgi  = shift;

    my $path = $cgi->path_info();
    my $handler = $dispatch{$path};

    my $header = $self->parse_headers();
    open F,qq{>>~/MyWebServer.log};
    my $dump = Data::Dumper->Dump([$header], [qw($header)]);
    print F $dump;
    close F;

    if (ref($handler) eq "CODE") {
        print "HTTP/1.0 200 OK\r\n";
        $handler->($cgi);

    } else {
        print "HTTP/1.0 404 Not found\r\n";
        print $cgi->header,
              $cgi->start_html('Not found'),
              $cgi->h1('Not found'),
              $cgi->end_html;
    }
}

sub resp_hello {
    my $cgi  = shift;   # CGI.pm object
    return if !ref $cgi;

    my $who = $cgi->param('name');

    print $cgi->header,
          $cgi->start_html("Hello"),
          $cgi->h1("Hello $who!"),
          $cgi->end_html;
}

} # end of package MyWebServer

# start the server on port 8080
my $pid = MyWebServer->new(8080)->background();
print "Use 'kill $pid' to stop server.\n";

Only added this part:

    my $header = $self->parse_headers();
    open F,qq{>>~/MyWebServer.log};
    my $dump = Data::Dumper->Dump([$header], [qw($header)]);
    print F $dump;
    close F;

My objective is to get all the headers and dump it into a file.

optional · Accepted Answer · 2015-06-03 02:50:37Z

2

Add

sub headers {
    my( $self, $headers ) = @_;
    if( $headers ){
        $self->{__last_headers} = { @$headers };
    }
    return $self->{__last_headers};
}

Then inside handle_request use my $header = $self->headers();

FWIW, i'm curious why you're using HTTP::Server::Simple::CGI instead of Mojolicious or Dancer or even HTTP::Server::Simple::PSGI. https://metacpan.org/pod/PSGI is portability.

answered Jun 3, 2015 at 2:50

optional

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1 Comment

Sophia Over a year ago

It worked! Thanks a lot! Also, I'll try those you have suggested, first time seeing them.

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