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package Plack::Middleware::ReverseProxyPath; |
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3
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3
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619660
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use strict; |
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3
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555
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3
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19
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use warnings; |
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111
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3
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1253
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use parent qw(Plack::Middleware); |
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3
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1750
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3
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24
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6
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our $VERSION = '0.03'; |
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8
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sub call { |
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44
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44
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1
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306255
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my $self = shift; |
10
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44
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90
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my $env = shift; |
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12
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44
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100
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100
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252
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if ( $env->{'HTTP_X_FORWARDED_SCRIPT_NAME'} |
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|| $env->{'HTTP_X_TRAVERSAL_PATH'} ) { |
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15
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36
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100
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138
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my $x_script_name = $env->{'HTTP_X_FORWARDED_SCRIPT_NAME'} || ''; |
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36
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50
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211
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my $x_traversal_path = $env->{'HTTP_X_TRAVERSAL_PATH'} || ''; |
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36
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66
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my $script_name = $env->{SCRIPT_NAME}; |
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19
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# replace $script_name . $path_info |
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# prefix of $x_traversal_path with $x_script_name |
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36
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100
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91
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if ( length $script_name >= length $x_traversal_path ) { |
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20
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100
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485
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$script_name =~ s/^\Q$x_traversal_path\E/$x_script_name/ |
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or _throw_error( |
24
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"HTTP_X_TRAVERSAL_PATH: $x_traversal_path\n" . |
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"is not a prefix of \n" . |
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"SCRIPT_NAME: $script_name\n" ); |
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} else { |
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# $x_traversal_path is longer, borrow from path_info |
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16
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100
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337
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$x_traversal_path =~ s/^\Q$script_name\E// |
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or _throw_error( |
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"SCRIPT_NAME $script_name\n" . |
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"is not a prefix of \n" . |
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"HTTP_X_TRAVERSAL_PATH: $x_traversal_path\n" ); |
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15
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32
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$script_name = $x_script_name; |
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36
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15
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100
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223
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$env->{PATH_INFO} =~ s/^\Q$x_traversal_path\E// |
37
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or _throw_error( |
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"Fragment: $x_traversal_path\n" . |
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"is not a prefix of \n" . |
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"PATH_INFO: $env->{PATH_INFO}\n" . |
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" SCRIPT_NAME: $script_name\n" . |
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" HTTP_X_TRAVERSAL_PATH: $env->{HTTP_X_TRAVERSAL_PATH}\n" ); |
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44
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# add PSGI required '/' (bad headers w/ trailing / could do it) |
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12
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48
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$env->{PATH_INFO} =~ s!^([^/])!/$1!; |
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} |
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48
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29
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100
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87
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if ( $script_name eq '/' ) { # PSGI doesn't allow '/' only |
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6
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10
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$script_name = ''; |
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} |
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29
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76
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$env->{SCRIPT_NAME} = $script_name; |
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53
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# don't touch REQUEST_URI, it will continue to refer to the original |
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} |
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56
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37
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143
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$self->app->($env); |
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} |
58
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59
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sub _throw_error { |
60
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7
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7
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13
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my ($message) = @_; |
61
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7
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54
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die Plack::Middleware::ReverseProxyPath::Exception->new($message); |
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} |
63
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64
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{ |
65
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package Plack::Middleware::ReverseProxyPath::Exception; |
66
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3
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3
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53006
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use overload '""' => \&message; |
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3
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9
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3
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25
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67
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sub new { |
68
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7
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7
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13
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my ($class, $message) = @_; |
69
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7
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82
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return bless { message => $message }, $class; |
70
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} |
71
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10
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10
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2854
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sub code { 500 } |
72
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17
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17
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632
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sub message { $_[0]->{message} } |
73
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} |
74
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75
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1; |
76
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77
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__END__ |