Perl tcp_proxy for http

Question

美好的一天！我不擅長編寫Perl，但有一個可怕的需求。 我發現，因爲它反向代理組織一個完整的解決方案...

#!/usr/bin/perl 

use warnings; 
use strict; 

use IO::Socket::INET; 
use IO::Select; 

my @allowed_ips = ('all'); 
my $ioset = IO::Select->new; 
my %socket_map; 

my $debug = 1; 

sub new_conn { 

    my ($host, $port) = @_; 
    return IO::Socket::INET->new(
     PeerAddr => $host, 
     PeerPort => $port 
    ) || die "Unable to connect to $host:$port: $!"; 
} 

sub new_server { 
    my ($host, $port) = @_; 

    my $server = IO::Socket::INET->new(
     LocalAddr => $host, 
     LocalPort => $port, 
     ReuseAddr => 1, 
     Listen => 100 
    ) || die "Unable to listen on $host:$port: $!"; 
} 

sub new_connection { 
    my $server  = shift; 
    my $remote_host = shift; 
    my $remote_port = shift; 

    my $client = $server->accept; 
    my $client_ip = client_ip($client); 

    unless (client_allowed($client)) { 

     print "Connection from $client_ip denied.\n" if $debug; 
     $client->close; 
     return; 
    } 
    print "Connection from $client_ip accepted.\n" if $debug; 

    my $remote = new_conn($remote_host, $remote_port); 
    $ioset->add($client); 
    $ioset->add($remote); 

    $socket_map{$client} = $remote; 
    $socket_map{$remote} = $client; 
} 

sub close_connection { 
    my $client = shift; 

    my $client_ip = client_ip($client); 
    my $remote = $socket_map{$client}; 

    $ioset->remove($client); 
    $ioset->remove($remote); 

    delete $socket_map{$client}; 
    delete $socket_map{$remote}; 

    $client->close; 
    $remote->close; 

    print "Connection from $client_ip closed.\n" if $debug; 
} 

sub client_ip { 
    my $client = shift; 

    return inet_ntoa($client->sockaddr); 
} 

sub client_allowed { 
    my $client = shift; 

    my $client_ip = client_ip($client); 
    return grep { $_ eq $client_ip || $_ eq 'all' } @allowed_ips; 
} 

die "Usage: $0 <local port> <remote_host:remote_port>" unless @ARGV == 2; 

my $local_port = shift; 
my ($remote_host, $remote_port) = split ':', shift(); 


print "Starting a server on 0.0.0.0:$local_port\n"; 
my $server = new_server('0.0.0.0', $local_port); 
$ioset->add($server); 

while (1) { 

    for my $socket ($ioset->can_read) { 

     if ($socket == $server) { 

      new_connection($server, $remote_host, $remote_port); 
     } 
     else { 

      next unless exists $socket_map{$socket}; 
      my $remote = $socket_map{$socket}; 
      my $buffer; 
      my $read = $socket->sysread($buffer, 4096); 

      if ($read) { 

       $remote->syswrite($buffer); 
      } 
      else { 

       close_connection($socket); 
      } 
     } 
    } 
} 

一切工作正常，但Web服務器，而我重定向客戶端不會看到HTTP_X_FORWARDED_FOR和HTTP_X_REAL_IP。標準模塊越低越好。 我會很感激你的幫助。

Answer 1

它不會看到它。由於您進行了TCP重定向，而不是HTTP重定向，並且代理添加了新的標頭。如果您想獲取這些字段，您需要在HTTP級別進行重定向。