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Commit | Line | Data |
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910592b4 | 1 | <?php |
95ebe737 | 2 | class Cache_Starred_Images extends Plugin implements IHandler { |
910592b4 AD |
3 | |
4 | private $host; | |
5 | private $cache_dir; | |
6 | ||
7 | function about() { | |
8 | return array(1.0, | |
9 | "Automatically cache images in Starred articles", | |
10 | "fox", | |
11 | true); | |
12 | } | |
13 | ||
95ebe737 AD |
14 | function csrf_ignore($method) { |
15 | return false; | |
16 | } | |
17 | ||
18 | function before($method) { | |
19 | return true; | |
20 | } | |
21 | ||
22 | function after() { | |
23 | return true; | |
24 | } | |
25 | ||
910592b4 AD |
26 | function init($host) { |
27 | $this->host = $host; | |
28 | ||
29 | $this->cache_dir = CACHE_DIR . "/starred-images/"; | |
30 | ||
31 | if (!is_dir($this->cache_dir)) { | |
32 | mkdir($this->cache_dir); | |
33 | } | |
34 | ||
35 | if (is_dir($this->cache_dir)) { | |
f5967cf8 AD |
36 | |
37 | if (!is_writable($this->cache_dir)) | |
38 | chmod($this->cache_dir, 0777); | |
910592b4 AD |
39 | |
40 | if (is_writable($this->cache_dir)) { | |
41 | $host->add_hook($host::HOOK_UPDATE_TASK, $this); | |
4e5ddeaf | 42 | $host->add_hook($host::HOOK_HOUSE_KEEPING, $this); |
910592b4 | 43 | $host->add_hook($host::HOOK_SANITIZE, $this); |
95ebe737 AD |
44 | $host->add_handler("public", "cache_starred_images_getimage", $this); |
45 | ||
910592b4 AD |
46 | } else { |
47 | user_error("Starred cache directory is not writable.", E_USER_WARNING); | |
48 | } | |
49 | ||
50 | } else { | |
51 | user_error("Unable to create starred cache directory.", E_USER_WARNING); | |
52 | } | |
53 | } | |
54 | ||
95ebe737 | 55 | function cache_starred_images_getimage() { |
ae3851b1 AD |
56 | ob_end_clean(); |
57 | ||
910592b4 AD |
58 | $hash = basename($_REQUEST["hash"]); |
59 | ||
60 | if ($hash) { | |
61 | ||
62 | $filename = $this->cache_dir . "/" . $hash . '.png'; | |
63 | ||
64 | if (file_exists($filename)) { | |
65 | /* See if we can use X-Sendfile */ | |
66 | $xsendfile = false; | |
67 | if (function_exists('apache_get_modules') && | |
68 | array_search('mod_xsendfile', apache_get_modules())) | |
69 | $xsendfile = true; | |
70 | ||
71 | if ($xsendfile) { | |
72 | header("X-Sendfile: $filename"); | |
73 | header("Content-type: application/octet-stream"); | |
74 | header('Content-Disposition: attachment; filename="' . basename($filename) . '"'); | |
75 | } else { | |
76 | header("Content-type: image/png"); | |
77 | $stamp = gmdate("D, d M Y H:i:s", filemtime($filename)). " GMT"; | |
78 | header("Last-Modified: $stamp", true); | |
910592b4 AD |
79 | readfile($filename); |
80 | } | |
81 | } else { | |
82 | header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found"); | |
83 | echo "File not found."; | |
84 | } | |
85 | } | |
86 | } | |
87 | ||
4e5ddeaf AD |
88 | function hook_house_keeping() { |
89 | $files = glob($this->cache_dir . "/*.png"); | |
90 | ||
91 | $last_article_id = 0; | |
92 | $article_exists = 1; | |
93 | ||
94 | foreach ($files as $file) { | |
95 | list ($article_id, $hash) = explode("-", basename($file)); | |
96 | ||
97 | if ($article_id != $last_article_id) { | |
98 | $last_article_id = $article_id; | |
99 | $article_id = db_escape_string($article_id); | |
100 | ||
101 | $result = db_query("SELECT id FROM ttrss_entries WHERE id = " . $article_id); | |
102 | ||
103 | $article_exists = db_num_rows($result) > 0; | |
104 | } | |
105 | ||
106 | if (!$article_exists) { | |
107 | unlink($file); | |
108 | } | |
109 | } | |
110 | } | |
111 | ||
910592b4 AD |
112 | function hook_sanitize($doc, $site_url, $allowed_elements, $disallowed_attributes, $article_id) { |
113 | $xpath = new DOMXpath($doc); | |
114 | ||
115 | if ($article_id) { | |
116 | $entries = $xpath->query('(//img[@src])'); | |
117 | ||
118 | foreach ($entries as $entry) { | |
119 | if ($entry->hasAttribute('src')) { | |
120 | $src = rewrite_relative_url($site_url, $entry->getAttribute('src')); | |
121 | ||
122 | $local_filename = $this->cache_dir . $article_id . "-" . sha1($src) . ".png"; | |
123 | ||
124 | if (file_exists($local_filename)) { | |
125 | $entry->setAttribute("src", get_self_url_prefix() . | |
95ebe737 | 126 | "/public.php?op=cache_starred_images_getimage&method=image&hash=" . |
910592b4 AD |
127 | $article_id . "-" . sha1($src)); |
128 | } | |
129 | ||
130 | } | |
131 | } | |
132 | } | |
133 | ||
134 | return $doc; | |
135 | } | |
136 | ||
137 | function hook_update_task() { | |
910592b4 AD |
138 | $result = db_query("SELECT content, ttrss_user_entries.owner_uid, link, site_url, ttrss_entries.id, plugin_data |
139 | FROM ttrss_entries, ttrss_user_entries LEFT JOIN ttrss_feeds ON | |
140 | (ttrss_user_entries.feed_id = ttrss_feeds.id) | |
141 | WHERE ref_id = ttrss_entries.id AND | |
142 | marked = true AND | |
143 | UPPER(content) LIKE '%<IMG%' AND | |
144 | site_url != '' AND | |
145 | plugin_data NOT LIKE '%starred_cache_images%' | |
146 | ORDER BY ".sql_random_function()." LIMIT 100"); | |
147 | ||
148 | ||
149 | while ($line = db_fetch_assoc($result)) { | |
150 | if ($line["site_url"]) { | |
151 | $success = $this->cache_article_images($line["content"], $line["site_url"], $line["owner_uid"], $line["id"]); | |
152 | ||
153 | if ($success) { | |
154 | $plugin_data = db_escape_string("starred_cache_images,${line['owner_uid']}:" . $line["plugin_data"]); | |
155 | ||
156 | db_query("UPDATE ttrss_entries SET plugin_data = '$plugin_data' WHERE id = " . $line["id"]); | |
157 | } | |
158 | } | |
159 | } | |
160 | } | |
161 | ||
162 | function cache_article_images($content, $site_url, $owner_uid, $article_id) { | |
163 | libxml_use_internal_errors(true); | |
164 | ||
165 | $charset_hack = '<head> | |
166 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> | |
167 | </head>'; | |
168 | ||
169 | $doc = new DOMDocument(); | |
170 | $doc->loadHTML($charset_hack . $content); | |
171 | $xpath = new DOMXPath($doc); | |
172 | ||
173 | $entries = $xpath->query('(//img[@src])'); | |
174 | ||
175 | $success = false; | |
176 | $has_images = false; | |
177 | ||
178 | foreach ($entries as $entry) { | |
179 | if ($entry->hasAttribute('src')) { | |
180 | $has_images = true; | |
181 | $src = rewrite_relative_url($site_url, $entry->getAttribute('src')); | |
182 | ||
183 | $local_filename = $this->cache_dir . $article_id . "-" . sha1($src) . ".png"; | |
184 | ||
185 | //_debug("cache_images: downloading: $src to $local_filename"); | |
186 | ||
187 | if (!file_exists($local_filename)) { | |
188 | $file_content = fetch_file_contents($src); | |
189 | ||
190 | if ($file_content && strlen($file_content) > 0) { | |
191 | file_put_contents($local_filename, $file_content); | |
192 | $success = true; | |
193 | } | |
194 | } else { | |
195 | $success = true; | |
196 | } | |
197 | } | |
198 | } | |
199 | ||
200 | return $success || !$has_images; | |
201 | } | |
202 | ||
203 | function api_version() { | |
204 | return 2; | |
205 | } | |
206 | } | |
207 | ?> |