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1 | # $Id: RSS.pm 1934 2006-04-22 05:13:55Z btrott $ |
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2 | |
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3 | package XML::Feed::Format::RSS; |
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4 | use strict; |
5 | |
6 | use base qw( XML::Feed ); |
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7 | use DateTime::Format::Mail; |
8 | use DateTime::Format::W3CDTF; |
9 | |
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10 | our $PREFERRED_PARSER = "XML::RSS"; |
11 | |
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12 | |
13 | sub identify { |
14 | my $class = shift; |
15 | my $xml = shift; |
16 | my $tag = $class->_get_first_tag($xml); |
17 | return ($tag eq 'rss' || $tag eq 'RDF'); |
18 | } |
19 | |
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20 | sub init_empty { |
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21 | my ($feed, %args) = @_; |
22 | $args{'version'} ||= '2.0'; |
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23 | eval "use $PREFERRED_PARSER"; die $@ if $@; |
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24 | $feed->{rss} = $PREFERRED_PARSER->new(%args); |
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25 | $feed->{rss}->add_module(prefix => "content", uri => 'http://purl.org/rss/1.0/modules/content/'); |
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26 | $feed->{rss}->add_module(prefix => "dcterms", uri => 'http://purl.org/dc/terms/'); |
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27 | $feed->{rss}->add_module(prefix => "atom", uri => 'http://www.w3.org/2005/Atom'); |
28 | $feed->{rss}->add_module(prefix => "geo", uri => 'http://www.w3.org/2003/01/geo/wgs84_pos#'); |
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29 | $feed; |
30 | } |
31 | |
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32 | sub init_string { |
33 | my $feed = shift; |
34 | my($str) = @_; |
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35 | $feed->init_empty; |
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36 | if ($str) { |
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37 | $feed->{rss}->parse($$str); |
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38 | } |
39 | $feed; |
40 | } |
41 | |
42 | sub format { 'RSS ' . $_[0]->{rss}->{'version'} } |
43 | |
44 | ## The following elements are the same in all versions of RSS. |
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45 | sub title { shift->{rss}->channel('title', @_) } |
46 | sub link { shift->{rss}->channel('link', @_) } |
47 | sub description { shift->{rss}->channel('description', @_) } |
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48 | |
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49 | # This doesn't exist in RSS |
50 | sub id { } |
51 | |
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52 | ## This is RSS 2.0 only--what's the equivalent in RSS 1.0? |
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53 | sub copyright { shift->{rss}->channel('copyright', @_) } |
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54 | |
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55 | sub base { |
56 | my $feed = shift; |
57 | if (@_) { |
58 | $feed->{rss}->{'xml:base'} = $_[0]; |
59 | } else { |
60 | $feed->{rss}->{'xml:base'}; |
61 | } |
62 | } |
63 | |
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64 | ## The following all work transparently in any RSS version. |
65 | sub language { |
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66 | my $feed = shift; |
67 | if (@_) { |
68 | $feed->{rss}->channel('language', $_[0]); |
69 | $feed->{rss}->channel->{dc}{language} = $_[0]; |
70 | } else { |
71 | $feed->{rss}->channel('language') || |
72 | $feed->{rss}->channel->{dc}{language}; |
73 | } |
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74 | } |
75 | |
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76 | sub self_link { |
77 | my $feed = shift; |
78 | |
79 | if (@_) { |
80 | my $uri = shift; |
81 | |
82 | $feed->{rss}->channel->{'atom'}{'link'} = |
83 | { |
84 | rel => "self", |
85 | href => $uri, |
86 | type => "application/rss+xml", |
87 | }; |
88 | } |
89 | |
90 | return $feed->{rss}->channel->{'atom'}{'link'}; |
91 | } |
92 | |
93 | |
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94 | sub generator { |
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95 | my $feed = shift; |
96 | if (@_) { |
97 | $feed->{rss}->channel('generator', $_[0]); |
98 | $feed->{rss}->channel->{'http://webns.net/mvcb/'}{generatorAgent} = |
99 | $_[0]; |
100 | } else { |
101 | $feed->{rss}->channel('generator') || |
102 | $feed->{rss}->channel->{'http://webns.net/mvcb/'}{generatorAgent}; |
103 | } |
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104 | } |
105 | |
106 | sub author { |
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107 | my $feed = shift; |
108 | if (@_) { |
109 | $feed->{rss}->channel('webMaster', $_[0]); |
110 | $feed->{rss}->channel->{dc}{creator} = $_[0]; |
111 | } else { |
112 | $feed->{rss}->channel('webMaster') || |
113 | $feed->{rss}->channel->{dc}{creator}; |
114 | } |
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115 | } |
116 | |
117 | sub modified { |
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118 | my $rss = shift->{rss}; |
119 | if (@_) { |
120 | $rss->channel('pubDate', |
121 | DateTime::Format::Mail->format_datetime($_[0])); |
122 | ## XML::RSS is so weird... if I set this, it will try to use |
123 | ## the value for the lastBuildDate, which I don't want--because |
124 | ## this date is formatted for an RSS 1.0 feed. So it's commented out. |
125 | #$rss->channel->{dc}{date} = |
126 | # DateTime::Format::W3CDTF->format_datetime($_[0]); |
fe3b3201 |
127 | } else { |
128 | my $date; |
129 | eval { |
130 | if (my $ts = $rss->channel('pubDate')) { |
131 | $date = DateTime::Format::Mail->parse_datetime($ts); |
132 | } elsif ($ts = $rss->channel->{dc}{date}) { |
133 | $date = DateTime::Format::W3CDTF->parse_datetime($ts); |
134 | } |
135 | }; |
136 | return $date; |
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137 | } |
138 | } |
139 | |
140 | sub entries { |
141 | my $rss = $_[0]->{rss}; |
142 | my @entries; |
143 | for my $item (@{ $rss->{items} }) { |
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144 | push @entries, XML::Feed::Entry::Format::RSS->wrap($item); |
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145 | } |
146 | @entries; |
147 | } |
148 | |
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149 | sub add_entry { |
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150 | my $feed = shift; |
151 | my $entry = shift || return; |
152 | $entry = $feed->_convert_entry($entry); |
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153 | $feed->{rss}->add_item(%{ $entry->unwrap }); |
154 | } |
155 | |
156 | sub as_xml { $_[0]->{rss}->as_string } |
157 | |
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158 | package XML::Feed::Entry::Format::RSS; |
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159 | use strict; |
160 | |
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161 | use XML::Feed::Content; |
162 | |
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163 | use base qw( XML::Feed::Entry ); |
164 | |
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165 | sub init_empty { $_[0]->{entry} = { } } |
166 | |
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167 | sub base { |
168 | my $entry = shift; |
169 | @_ ? $entry->{entry}->{'xml:base'} = $_[0] : $entry->{entry}->{'xml:base'}; |
170 | } |
171 | |
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172 | sub title { |
173 | my $entry = shift; |
174 | @_ ? $entry->{entry}{title} = $_[0] : $entry->{entry}{title}; |
175 | } |
176 | |
177 | sub link { |
178 | my $entry = shift; |
179 | if (@_) { |
180 | $entry->{entry}{link} = $_[0]; |
181 | ## For RSS 2.0 output from XML::RSS. Sigh. |
182 | $entry->{entry}{permaLink} = $_[0]; |
183 | } else { |
184 | $entry->{entry}{link} || $entry->{entry}{guid}; |
185 | } |
186 | } |
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187 | |
188 | sub summary { |
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189 | my $item = shift->{entry}; |
190 | if (@_) { |
191 | $item->{description} = ref($_[0]) eq 'XML::Feed::Content' ? |
192 | $_[0]->body : $_[0]; |
193 | ## Because of the logic below, we need to add some dummy content, |
194 | ## so that we'll properly recognize the description we enter as |
195 | ## the summary. |
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196 | if (!$item->{content}{encoded} && |
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197 | !$item->{'http://www.w3.org/1999/xhtml'}{body}) { |
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198 | $item->{content}{encoded} = ' '; |
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199 | } |
200 | } else { |
201 | ## Some RSS feeds use <description> for a summary, and some use it |
202 | ## for the full content. Pretty gross. We don't want to return the |
203 | ## full content if the caller expects a summary, so the heuristic is: |
204 | ## if the <entry> contains both a <description> and one of the elements |
205 | ## typically used for the full content, use <description> as summary. |
206 | my $txt; |
207 | if ($item->{description} && |
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208 | ($item->{content}{encoded} || |
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209 | $item->{'http://www.w3.org/1999/xhtml'}{body})) { |
210 | $txt = $item->{description}; |
211 | } |
212 | XML::Feed::Content->wrap({ type => 'text/plain', body => $txt }); |
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213 | } |
a749d9b9 |
214 | } |
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215 | |
216 | sub content { |
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217 | my $item = shift->{entry}; |
218 | if (@_) { |
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219 | my $c; |
220 | if (ref($_[0]) eq 'XML::Feed::Content') { |
221 | if (defined $_[0]->base) { |
222 | $c = { 'content' => $_[0]->body, 'xml:base' => $_[0]->base }; |
223 | } else { |
224 | $c = $_[0]->body; |
225 | } |
226 | } else { |
227 | $c = $_[0]; |
228 | } |
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229 | $item->{content}{encoded} = $c; |
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230 | } else { |
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231 | my $base; |
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232 | my $body = |
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233 | $item->{content}{encoded} || |
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234 | $item->{'http://www.w3.org/1999/xhtml'}{body} || |
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235 | $item->{description}; |
236 | if ('HASH' eq ref($body)) { |
237 | $base = $body->{'xml:base'}; |
238 | $body = $body->{content}; |
239 | } |
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240 | XML::Feed::Content->wrap({ type => 'text/html', body => $body, base => $base }); |
973e1f9e |
241 | } |
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242 | } |
243 | |
244 | sub category { |
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245 | my $item = shift->{entry}; |
246 | if (@_) { |
247 | $item->{category} = $item->{dc}{subject} = $_[0]; |
248 | } else { |
249 | $item->{category} || $item->{dc}{subject}; |
250 | } |
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251 | } |
252 | |
253 | sub author { |
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254 | my $item = shift->{entry}; |
255 | if (@_) { |
256 | $item->{author} = $item->{dc}{creator} = $_[0]; |
257 | } else { |
258 | $item->{author} || $item->{dc}{creator}; |
259 | } |
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260 | } |
261 | |
262 | ## XML::RSS doesn't give us access to the rdf:about for the <item>, |
263 | ## so we have to fall back to the <link> element in RSS 1.0 feeds. |
264 | sub id { |
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265 | my $item = shift->{entry}; |
266 | if (@_) { |
267 | $item->{guid} = $_[0]; |
268 | } else { |
269 | $item->{guid} || $item->{link}; |
270 | } |
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271 | } |
272 | |
273 | sub issued { |
973e1f9e |
274 | my $item = shift->{entry}; |
275 | if (@_) { |
276 | $item->{dc}{date} = DateTime::Format::W3CDTF->format_datetime($_[0]); |
277 | $item->{pubDate} = DateTime::Format::Mail->format_datetime($_[0]); |
278 | } else { |
ecac864a |
279 | ## Either of these could die if the format is invalid. |
280 | my $date; |
281 | eval { |
282 | if (my $ts = $item->{pubDate}) { |
283 | my $parser = DateTime::Format::Mail->new; |
284 | $parser->loose; |
285 | $date = $parser->parse_datetime($ts); |
286 | } elsif ($ts = $item->{dc}{date}) { |
287 | $date = DateTime::Format::W3CDTF->parse_datetime($ts); |
288 | } |
289 | }; |
290 | return $date; |
0d5e38d1 |
291 | } |
292 | } |
293 | |
294 | sub modified { |
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295 | my $item = shift->{entry}; |
296 | if (@_) { |
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297 | $item->{dcterms}{modified} = |
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298 | DateTime::Format::W3CDTF->format_datetime($_[0]); |
299 | } else { |
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300 | if (my $ts = $item->{dcterms}{modified}) { |
ecac864a |
301 | return eval { DateTime::Format::W3CDTF->parse_datetime($ts) }; |
973e1f9e |
302 | } |
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303 | } |
304 | } |
305 | |
9a36f82c |
306 | sub lat { |
307 | my $item = shift->{entry}; |
308 | if (@_) { |
bd19b444 |
309 | $item->{geo}{lat} = $_[0]; |
9a36f82c |
310 | } else { |
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311 | return $item->{geo}{lat}; |
9a36f82c |
312 | } |
313 | } |
314 | |
315 | sub long { |
316 | my $item = shift->{entry}; |
317 | if (@_) { |
bd19b444 |
318 | $item->{geo}{long} = $_[0]; |
9a36f82c |
319 | } else { |
bd19b444 |
320 | return $item->{geo}{long}; |
9a36f82c |
321 | } |
322 | } |
323 | |
324 | |
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325 | 1; |