How can I write a simple HTTP proxy in Perl?

问题:

I don't want to use the HTTP::Proxy package because I want to dump out a couple requests. My one liner looks like this, but breaks on trying to pass the header in:

perl -MData::Dumper -MHTTP::Daemon -MHTTP::Status -MLWP::UserAgent -e 'my $ua = LWP::UserAgent->new;my $d=new HTTP::Daemon(LocalPort=>1999);print "Please contact me at: <", $d->url, ">\n";while (my $c = $d->accept) {while (my $r = $c->get_request) {if ($r->method eq 'GET' and $r->url->path eq "/uploader") {$c->send_response("whatever.");print Dumper($r);}else{$response=$ua->request($r->method,"http://localhost:1996".$r->uri,$r->headers,$r->content);$c->send_response($response);}}}'

formatted, that's:

#perl -e '
use Data::Dumper;
use HTTP::Daemon;
use HTTP::Status;
use LWP::UserAgent;
my $ua = LWP::UserAgent->new;
my $d=new HTTP::Daemon(LocalPort=>1999);
print "Please contact me at: < ", $d->url, " >\n";
while (my $c = $d->accept) {
  while (my $r = $c->get_request) {
    if ($r->method eq 'GET' and $r->url->path eq "/uploaded") {
      $c->send_response("whatever.");
      print Dumper($r);
    } else { 
      $response = $ua -> request(
        $r->method, 
        "http://localhost:1996" . $r->uri, 
        $r->headers, 
        $r->content);
      $c->send_response($response);
    }
  }
}#'

So I can't just pass in the request, because I need to change the host, and I can't just pass in the headers it seems... so what should I do to keep it short.

So can anyone make this a better one-liner?

回答1:

Aw shoot, I fixed it with this:

#perl -e '
use Data::Dumper;
use HTTP::Daemon;
use HTTP::Status;
use LWP::UserAgent;
my $ua = LWP::UserAgent->new;
my $d=new HTTP::Daemon(LocalPort=>1999);
print "Please contact me at: < ", $d->url, " >\n";
while (my $c = $d->accept) {
  while (my $r = $c->get_request) {
    if ($r->method eq "GET" and $r->url->path eq "/uploaded") {
      $c->send_response("whatever.");
      print Dumper($r);
    } else { 
      $response = $ua -> request( HTTP::Request->new(
        $r->method, 
        "http://localhost:1996" . $r->uri, 
        $r->headers, 
        $r->content));
      $c->send_response($response);
    }
  }
}#'

note the HTTP::Request->new yeah... so it works, it's a tad slow. but that's okay

回答2:

Why are you trying so hard to write a one-liner? Is there some reason you can't save the program in a file? I'm just curious what the situation is.