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package Plack::Middleware::JSON::ForBrowsers; |
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{ |
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$Plack::Middleware::JSON::ForBrowsers::VERSION = '0.002000'; |
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} |
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use parent qw(Plack::Middleware); |
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# ABSTRACT: Plack middleware which turns application/json responses into HTML |
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use strict; |
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use warnings; |
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use Carp; |
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use JSON; |
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use MRO::Compat; |
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use Plack::Util::Accessor qw(json html_head html_foot); |
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use List::MoreUtils qw(any); |
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use Encode; |
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use HTML::Entities qw(encode_entities_numeric); |
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11345
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chomp(my $html_head = <<'EOHTML'); |
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JSON::ForBrowsers |
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EOHTML |
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(my $html_foot = <<'EOHTML') =~ s/^\s+//x; |
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EOHTML |
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my @json_types = qw(application/json); |
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my @html_types = qw(text/html application/xhtml+xml); |
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sub new { |
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1
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6788
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my ($class, $arg_ref) = @_; |
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my $self = $class->next::method($arg_ref); |
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$self->json(JSON->new()->utf8()->pretty()); |
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8
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100
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unless (defined $self->html_head()) { |
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$self->html_head($html_head); |
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} |
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8
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100
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unless (defined $self->html_foot()) { |
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$self->html_foot($html_foot); |
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} |
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return $self; |
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} |
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71
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72
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73
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sub call { |
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4
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1
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42480
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my($self, $env) = @_; |
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76
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4
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my $res = $self->app->($env); |
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78
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4
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100
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unless ($self->looks_like_browser_request($env)) { |
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3
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16
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return $res; |
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} |
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return $self->response_cb($res, sub { |
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1
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1
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11
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my ($cb_res) = @_; |
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85
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1
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5
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my $h = Plack::Util::headers($cb_res->[1]); |
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# Ignore stuff like '; charset=utf-8' for now, just assume UTF-8 input |
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1
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50
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31
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if (any { index($h->get('Content-Type'), $_) >= 0 } @json_types) { |
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11
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1
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47
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$h->set('Content-Type' => 'text/html; charset=utf-8'); |
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90
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1
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41
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my $json = ''; |
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1
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2
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my $seen_last = 0; |
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return sub { |
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2
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100
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46
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if (defined $_[0]) { |
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1
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3
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$json .= $_[0]; |
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1
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3
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return ''; |
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} |
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else { |
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1
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50
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3
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if ($seen_last) { |
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0
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0
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return; |
100
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} |
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else { |
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1
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2
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$seen_last = 1; |
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1
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4
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return $self->json_to_html($json); |
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} |
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} |
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1
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6
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}; |
107
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} |
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0
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0
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return; |
109
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1
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12
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}); |
110
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} |
111
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112
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113
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114
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sub looks_like_browser_request { |
115
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10
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10
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1
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24
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my ($self, $env) = @_; |
116
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117
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10
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100
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66
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42
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if (defined $env->{HTTP_X_REQUESTED_WITH} |
118
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&& $env->{HTTP_X_REQUESTED_WITH} eq 'XMLHttpRequest') { |
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3
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13
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return 0; |
120
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} |
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122
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7
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100
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100
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43
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if (defined $env->{HTTP_ACCEPT} |
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5
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5
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24
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&& any { index($env->{HTTP_ACCEPT}, $_) >= 0 } @html_types) { |
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3
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11
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return 1; |
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} |
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127
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4
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15
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return 0; |
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} |
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130
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131
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132
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sub json_to_html { |
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7
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7
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1
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48
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my ($self, $json) = @_; |
134
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135
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7
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20
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my $pretty_json_string = decode( |
136
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'UTF-8', |
137
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$self->json()->encode( |
138
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$self->json()->decode($json) |
139
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) |
140
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); |
141
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7
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385
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chomp $pretty_json_string; |
142
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7
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20
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return encode( |
143
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'UTF-8', |
144
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$self->html_head() |
145
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. encode_entities_numeric($pretty_json_string) . |
146
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$self->html_foot() |
147
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); |
148
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} |
149
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150
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151
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1; |
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153
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154
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__END__ |