-
Notifications
You must be signed in to change notification settings - Fork 0
/
sender.php
406 lines (318 loc) · 11.9 KB
/
sender.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
<?php
class WP_Webmention_Again_Sender extends WP_Webmention_Again {
// cron handle for processing outgoing
const cron = 'webmention_send';
const pung = '_webmention_pung';
/**
* regular cron interval for processing incoming
*
* use 'wp-webmention-again_interval_received' to filter this integer
*
* @return int cron interval in seconds
*
*/
protected static function interval () {
return apply_filters( 'wp-webmention-again-sender_interval', 90 );
}
/**
* maximum amount of posts per batch to be processed
*
* use 'wp-webmention-again_per_batch' to filter this int
*
* @return int posts per batch
*
*/
protected static function per_batch () {
return apply_filters( 'wp-webmention-again-sender_per_batch', 42 );
}
/**
* max number of retries ( both for outgoing and incoming )
*
* use 'wp-webmention-again_retry' to filter this integer
*
* @return int cron interval in seconds
*
*/
protected static function retry () {
return apply_filters( 'wp-webmention-again-sender_retry', 5 );
}
public function __construct() {
parent::__construct();
// extend current cron schedules with our entry
//add_filter( 'cron_schedules', array(&$this, 'add_cron_schedule' ) );
// this is mostly for debugging reasons
// register_activation_hook( __FILE__ , array( __CLASS__ , 'plugin_activate' ) );
// clear schedules if there's any on deactivation
register_deactivation_hook( __FILE__ , array( __CLASS__ , 'plugin_deactivate' ) );
// register the action for processing received
add_action( static::cron, array( &$this, 'process' ) );
// register new posts
add_action( 'transition_post_status', array( &$this, 'queue_post' ), 98, 5 );
}
public function init () {
// get_pung is not restrictive enough
//add_filter ( 'get_pung', array( &$this, 'get_pung' ) );
if ( ! wp_get_schedule( static::cron ) )
wp_schedule_event( time(), static::cron, static::cron );
}
/**
* plugin deactivation hook
*
* makes sure there are no scheduled cron hooks left
*
*/
public static function plugin_deactivate () {
wp_unschedule_event( time(), static::cron );
wp_clear_scheduled_hook( static::cron );
}
/**
* make pung stricter
*
* @param array $pung array of pinged urls
*
* @return array a better array of pinged urls
*
*
public static function get_pung ( $post ) {
foreach ($pung as $k => $e )
$pung[ $k ] = strtolower( $e );
$pung = array_unique($pung);
return $pung;
}
/**
* triggered on post transition, applied when new status is publish, therefore
* applied on edit of published posts as well
* add a post meta to the post to be processed by the send processor
*
* @param string $new_status New post status
* @param string $old_status Previous post status
* @param object $post WP Post object
*/
public static function queue_post( $new_status, $old_status, $post ) {
if ( ! static::is_post( $post ) ) {
static::debug( "Whoops, this is not a post.", 6);
return false;
}
// send delete messages when trashed
if ( 'publish' != $new_status && 'trash' != $new_status ) {
static::debug( "Ignoring post; neither published nor trashed" );
return false;
}
else {
static::debug( "Adding {$post->ID} to mention queue" );
}
static::debug("Trying to get urls for #{$post->ID}", 6);
// try to avoid redirects, so no shortlink is sent for now as source
$source = get_permalink( $post->ID );
if ( 'trash' == $new_status )
$source = str_replace( '__trashed', '', $source );
// process the content as if it was the_content()
$content = static::get_the_content( $post );
// get all urls in content
$urls = static::extract_urls( $content );
// for special ocasions when someone wants to add to this list
$urls = apply_filters( 'webmention_links', $urls, $post->ID );
// lowercase url is good for your mental health
foreach ( $urls as $k => $url )
$urls[ $k ] = strtolower( $url );
// remove all already pinged urls
//$pung = get_post_meta( $post->ID, static::pung, false );
/*
// retrofill pung from pingback field, temporary
if ( empty ($pung) ) {
$_pung = get_pung ( $post->ID );
if ( ! empty ($_pung) ) {
$pung = $_pung;
foreach ( $_pung as $url ) {
add_post_meta( $post->ID, static::pung, $url, false );
}
}
}
*/
//$urls = array_diff ( $urls, $pung );
foreach ( $urls as $target ) {
$s_domain = parse_url( $source, PHP_URL_HOST);
$t_domain = parse_url( $target, PHP_URL_HOST);
// skip self-pings
if ( $s_domain == $t_domain )
continue;
$post_updated = get_post_modified_time( 'U', false, $post, false );
$r = static::queue_add ( 'out', $source, $target, $post->post_type, $post->ID, $post_updated );
if ( !$r )
static::debug( " tried adding post #{$post->ID}, url: {$target} to mention queue, but it didn't go well", 4);
}
}
/**
* worker method for doing received webmentions
* triggered by cron
*
*/
public function process () {
$outgoing = static::queue_get ( 'out', static::per_batch() );
if ( empty( $outgoing ) )
return true;
foreach ( (array)$outgoing as $send ) {
// this really should not happen, but if it does, get rid of this entry immediately
if (! isset( $send->target ) ||
empty( $send->target ) ||
! isset( $send->source ) ||
empty( $send->source )
) {
static::debug( " target or souce empty, aborting", 6);
static::queue_del ( $send->id );
continue;
}
static::debug( "processing webmention: target -> {$send->target}, source -> {$send->source}", 5 );
// too many retries, drop this mention and walk away
if ( $send->tries >= static::retry() ) {
static::debug( " this mention was tried earlier and failed too many times, drop it", 5);
static::queue_del( $send->id );
continue;
}
// increment retries
static::queue_inc ( $send->id );
// try sending
$s = static::send( $send->source, $send->target );
if ( false == $s ) {
static::debug( " sending failed", 5);
}
else {
static::debug( " sending succeeded!", 5);
//$post_types = get_post_types( '', 'names' );
//if ( in_array( $send->object_type, $post_types ) && 0 != $send->object_id ) {
//add_post_meta ( $send->object_id, static::pung, $send->target, false );
//add_ping( $send->object_id, $send->target );
//}
static::queue_del ( $send->id );
}
}
}
/**
* send a single webmention
* based on [webmention](https://github.com/pfefferle/wordpress-webmention)
*
*/
public static function send ( $source, $target, $post_id = false ) {
$options = static::get_options();
// stop selfpings on the same URL
if ( isset( $options['disable_selfpings_same_url'] ) &&
$options['disable_selfpings_same_url'] == '1' &&
$source === $target
) {
static::debug("Refusing to selfping the same url", 6);
return false;
}
// stop selfpings on the same domain
if ( isset( $options['disable_selfpings_same_domain'] ) &&
$options['disable_selfpings_same_domain'] == '1' &&
parse_url( $source, PHP_URL_HOST ) == parse_url( $target, PHP_URL_HOST )
) {
static::debug("Refusing to selfping the self domain", 6);
return false;
}
// trigger archive call here
wp_schedule_single_event( time() + 120, 'trigger_archive_org', array ( 'url' => $target ) );
// discover the webmention endpoint
$webmention_server_url = static::discover_endpoint( $target );
static::debug("Endpoint discovered as: {$webmention_server_url}", 6);
// if I can't find an endpoint, perhaps you can!
$webmention_server_url = apply_filters( 'webmention_server_url', $webmention_server_url, $target );
if ( $webmention_server_url ) {
$args = array(
'body' => 'source=' . urlencode( $source ) . '&target=' . urlencode( $target ),
'timeout' => static::remote_timeout(),
);
static::debug( "Sending webmention to: " .$webmention_server_url . " as: " . $args['body'], 5);
$response = wp_remote_post( $webmention_server_url, $args );
// use the response to do something usefull
// do_action( 'webmention_post_send', $response, $source, $target, $post_ID );
if ( is_wp_error( $response ) ) {
static::debug( "sending failed: " . $response->get_error_message(), 4);
return false;
}
if ( ! is_array( $response ) || ! isset( $response['response'] ) || ! isset( $response['response']['code'] ) || empty( $response['response']['code'] ) ) {
static::debug( "sending failed: the response is empty", 4);
return false;
}
if ( 200 <= $response['response']['code'] && 300 > $response['response']['code'] ) {
static::debug( "sending succeeded: {$response['response']['code']}, message: {$response['response']['message']}", 5);
return true;
}
else {
static::debug( "wrong response code, this sending probably failed: {$response['response']['code']}, message: {$response['response']['message']}", 4);
return false;
}
}
return false;
}
/**
* Finds a WebMention server URI based on the given URL
*
* code from [webmention](https://github.com/pfefferle/wordpress-webmention)
*
* Checks the HTML for the rel="http://webmention.org/" link and http://webmention.org/ headers. It does
* a check for the http://webmention.org/ headers first and returns that, if available. The
* check for the rel="http://webmention.org/" has more overhead than just the header.
*
* @param string $url URL to ping
*
* @return bool|string False on failure, string containing URI on success
*/
protected static function discover_endpoint( $url ) {
// Not an URL. This should never happen.
if ( false === filter_var( $url, FILTER_VALIDATE_URL ) )
return false;
// do not search for a WebMention server on our own uploads
$uploads_dir = wp_upload_dir();
if ( 0 === strpos( $url, $uploads_dir['baseurl'] ) )
return false;
$response = wp_remote_head( $url, array( 'timeout' => static::remote_timeout(), 'httpversion' => '1.0' ) );
if ( is_wp_error( $response ) ) {
static::debug( "Something went wrong: " . $response->get_error_message(), 5);
return false;
}
// check link header
if ( $links = wp_remote_retrieve_header( $response, 'link' ) ) {
if ( is_array( $links ) ) {
foreach ( $links as $link ) {
if ( preg_match( '/<(.[^>]+)>;\s+rel\s?=\s?[\"\']?(http:\/\/)?webmention(.org)?\/?[\"\']?/i', $link, $result ) ) {
return self::make_url_absolute( $url, $result[1] );
}
}
} else {
if ( preg_match( '/<(.[^>]+)>;\s+rel\s?=\s?[\"\']?(http:\/\/)?webmention(.org)?\/?[\"\']?/i', $links, $result ) ) {
return self::make_url_absolute( $url, $result[1] );
}
}
}
// not an (x)html, sgml, or xml page, no use going further
if ( preg_match( '#(image|audio|video|model)/#is', wp_remote_retrieve_header( $response, 'content-type' ) ) ) {
return false;
}
// now do a GET since we're going to look in the html headers (and we're sure its not a binary file)
$response = wp_remote_get( $url, array( 'timeout' => static::remote_timeout(), 'httpversion' => '1.0' ) );
if ( is_wp_error( $response ) ) {
return false;
}
$contents = wp_remote_retrieve_body( $response );
// boost performance and use alreade the header
$header = substr( $contents, 0, stripos( $contents, '</head>' ) );
// unicode to HTML entities
$contents = mb_convert_encoding( $contents, 'HTML-ENTITIES', mb_detect_encoding( $contents ) );
libxml_use_internal_errors( true );
$doc = new DOMDocument();
$doc->loadHTML( $contents );
$xpath = new DOMXPath( $doc );
// check <link> elements
// checks only head-links
foreach ( $xpath->query( '//head/link[contains(concat(" ", @rel, " "), " webmention ") or contains(@rel, "webmention.org")]/@href' ) as $result ) {
return self::make_url_absolute( $url, $result->value );
}
// check <a> elements
// checks only body>a-links
foreach ( $xpath->query( '//body//a[contains(concat(" ", @rel, " "), " webmention ") or contains(@rel, "webmention.org")]/@href' ) as $result ) {
return self::make_url_absolute( $url, $result->value );
}
return false;
}
}