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c4ebf01e AD |
1 | <?php |
2 | class Af_Zz_ImgProxy extends Plugin { | |
3 | private $host; | |
4 | ||
5 | function about() { | |
6 | return array(1.0, | |
c93d43c6 | 7 | "Load insecure images via built-in proxy", |
c4ebf01e AD |
8 | "fox"); |
9 | } | |
10 | ||
4daaf234 AD |
11 | function is_public_method($method) { |
12 | return $method === "imgproxy"; | |
13 | } | |
14 | ||
c4ebf01e AD |
15 | function init($host) { |
16 | $this->host = $host; | |
17 | ||
18 | $host->add_hook($host::HOOK_RENDER_ARTICLE, $this); | |
19 | $host->add_hook($host::HOOK_RENDER_ARTICLE_CDM, $this); | |
58210301 | 20 | $host->add_hook($host::HOOK_ENCLOSURE_ENTRY, $this); |
8cf37284 AD |
21 | |
22 | $host->add_hook($host::HOOK_PREFS_TAB, $this); | |
c4ebf01e AD |
23 | } |
24 | ||
58210301 | 25 | function hook_enclosure_entry($enc) { |
046a0cc7 | 26 | if (preg_match("/image/", $enc["content_type"]) || preg_match("/\.(jpe?g|png|gif|bmp)$/i", $enc["filename"])) { |
bc83dcb3 | 27 | $proxy_all = $this->host->get($this, "proxy_all"); |
58210301 | 28 | |
41bead9b | 29 | $enc["content_url"] = $this->rewrite_url_if_needed($enc["content_url"], $proxy_all); |
bc83dcb3 | 30 | } |
58210301 AD |
31 | |
32 | return $enc; | |
33 | } | |
34 | ||
c4ebf01e AD |
35 | function hook_render_article($article) { |
36 | return $this->hook_render_article_cdm($article); | |
37 | } | |
38 | ||
c93d43c6 | 39 | public function imgproxy() { |
4daaf234 | 40 | |
c93d43c6 | 41 | $url = rewrite_relative_url(SELF_URL_PATH, $_REQUEST["url"]); |
c4ebf01e | 42 | |
2187322c AD |
43 | // called without user context, let's just redirect to original URL |
44 | if (!$_SESSION["uid"]) { | |
45 | header("Location: $url"); | |
46 | return; | |
47 | } | |
48 | ||
41bead9b | 49 | $local_filename = CACHE_DIR . "/images/" . sha1($url); |
c4ebf01e | 50 | |
51198e7e | 51 | if ($_REQUEST["debug"] == "1") { print $url . "\n" . $local_filename; die; } |
c4ebf01e | 52 | |
38b3998b | 53 | header("Content-Disposition: inline; filename=\"".basename($local_filename)."\""); |
c4ebf01e | 54 | |
c93d43c6 | 55 | if (file_exists($local_filename)) { |
38b3998b AD |
56 | $mimetype = mime_content_type($local_filename); |
57 | header("Content-type: $mimetype"); | |
58 | ||
59 | $stamp = gmdate("D, d M Y H:i:s", filemtime($local_filename)). " GMT"; | |
60 | header("Last-Modified: $stamp", true); | |
61 | ||
c93d43c6 | 62 | readfile($local_filename); |
c4ebf01e | 63 | } else { |
c55fb22b | 64 | $data = fetch_file_contents(array("url" => $url)); |
51198e7e | 65 | |
c93d43c6 | 66 | if ($data) { |
38b3998b AD |
67 | if (file_put_contents($local_filename, $data)) { |
68 | $mimetype = mime_content_type($local_filename); | |
69 | header("Content-type: $mimetype"); | |
70 | } | |
71 | ||
c93d43c6 | 72 | print $data; |
bf639865 AD |
73 | } else { |
74 | global $fetch_last_error; | |
75 | global $fetch_last_error_code; | |
76 | global $fetch_last_error_content; | |
77 | ||
c55fb22b | 78 | if (function_exists("imagecreate") && !isset($_REQUEST["text"])) { |
093d4633 | 79 | $img = imagecreate(450, 75); |
bf639865 AD |
80 | |
81 | $bg = imagecolorallocate($img, 255, 255, 255); | |
82 | $textcolor = imagecolorallocate($img, 255, 0, 0); | |
83 | ||
093d4633 | 84 | imagerectangle($img, 0, 0, 450-1, 75-1, $textcolor); |
bf639865 AD |
85 | |
86 | imagestring($img, 5, 5, 5, "Proxy request failed", $textcolor); | |
093d4633 | 87 | imagestring($img, 5, 5, 30, truncate_middle($url, 46, "..."), $textcolor); |
bf639865 AD |
88 | imagestring($img, 5, 5, 55, "HTTP Code: $fetch_last_error_code", $textcolor); |
89 | ||
90 | header("Content-type: image/png"); | |
91 | print imagepng($img); | |
92 | imagedestroy($img); | |
93 | ||
94 | } else { | |
95 | header("Content-type: text/html"); | |
96 | ||
97 | http_response_code(400); | |
98 | ||
99 | print "<h1>Proxy request failed.</h1>"; | |
100 | print "<p>Fetch error $fetch_last_error ($fetch_last_error_code)</p>"; | |
101 | print "<p>URL: $url</p>"; | |
102 | print "<textarea cols='80' rows='25'>" . htmlspecialchars($fetch_last_error_content) . "</textarea>"; | |
103 | } | |
c93d43c6 | 104 | } |
c4ebf01e | 105 | } |
c4ebf01e AD |
106 | } |
107 | ||
41bead9b | 108 | function rewrite_url_if_needed($url, $all_remote = false) { |
c4ebf01e AD |
109 | $scheme = parse_url($url, PHP_URL_SCHEME); |
110 | ||
8cf37284 AD |
111 | if ($all_remote) { |
112 | $host = parse_url($url, PHP_URL_HOST); | |
113 | $self_host = parse_url(SELF_URL_PATH, PHP_URL_HOST); | |
114 | ||
115 | $is_remote = $host != $self_host; | |
116 | } else { | |
117 | $is_remote = false; | |
118 | } | |
119 | ||
120 | if (($scheme != 'https' && $scheme != "") || $is_remote) { | |
121 | if (strpos($url, "data:") !== 0) { | |
41bead9b | 122 | $url = get_self_url_prefix() . "/public.php?op=pluginhandler&plugin=af_zz_imgproxy&pmethod=imgproxy&url=" . |
51198e7e | 123 | urlencode($url); |
8cf37284 | 124 | } |
c4ebf01e AD |
125 | } |
126 | ||
127 | return $url; | |
128 | } | |
129 | ||
130 | function hook_render_article_cdm($article, $api_mode = false) { | |
131 | ||
132 | $need_saving = false; | |
8cf37284 | 133 | $proxy_all = $this->host->get($this, "proxy_all"); |
c4ebf01e AD |
134 | |
135 | $doc = new DOMDocument(); | |
136 | if (@$doc->loadHTML($article["content"])) { | |
137 | $xpath = new DOMXPath($doc); | |
138 | $imgs = $xpath->query("//img[@src]"); | |
139 | ||
140 | foreach ($imgs as $img) { | |
41bead9b | 141 | $new_src = $this->rewrite_url_if_needed($img->getAttribute("src"), $proxy_all); |
c4ebf01e AD |
142 | |
143 | if ($new_src != $img->getAttribute("src")) { | |
144 | $img->setAttribute("src", $new_src); | |
c55fb22b | 145 | $img->removeAttribute("srcset"); |
c4ebf01e AD |
146 | |
147 | $need_saving = true; | |
148 | } | |
149 | } | |
150 | ||
151 | $vids = $xpath->query("//video"); | |
152 | ||
153 | foreach ($vids as $vid) { | |
154 | if ($vid->hasAttribute("poster")) { | |
41bead9b | 155 | $new_src = $this->rewrite_url_if_needed($vid->getAttribute("poster"), $proxy_all); |
c4ebf01e AD |
156 | |
157 | if ($new_src != $vid->getAttribute("poster")) { | |
158 | $vid->setAttribute("poster", $new_src); | |
159 | ||
160 | $need_saving = true; | |
161 | } | |
162 | } | |
163 | ||
164 | $vsrcs = $xpath->query("source", $vid); | |
165 | ||
166 | foreach ($vsrcs as $vsrc) { | |
41bead9b | 167 | $new_src = $this->rewrite_url_if_needed($vsrc->getAttribute("src"), $proxy_all); |
c4ebf01e AD |
168 | |
169 | if ($new_src != $vsrc->getAttribute("src")) { | |
170 | $vid->setAttribute("src", $new_src); | |
171 | ||
172 | $need_saving = true; | |
173 | } | |
174 | } | |
175 | } | |
176 | } | |
177 | ||
178 | if ($need_saving) $article["content"] = $doc->saveXML(); | |
179 | ||
180 | return $article; | |
181 | } | |
182 | ||
8cf37284 AD |
183 | function hook_prefs_tab($args) { |
184 | if ($args != "prefFeeds") return; | |
185 | ||
dc8bd8a6 | 186 | print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Image proxy settings (af_zz_imgproxy)')."\">"; |
8cf37284 AD |
187 | |
188 | print "<form dojoType=\"dijit.form.Form\">"; | |
189 | ||
190 | print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\"> | |
191 | evt.preventDefault(); | |
192 | if (this.validate()) { | |
193 | console.log(dojo.objectToQuery(this.getValues())); | |
194 | new Ajax.Request('backend.php', { | |
195 | parameters: dojo.objectToQuery(this.getValues()), | |
196 | onComplete: function(transport) { | |
197 | notify_info(transport.responseText); | |
198 | } | |
199 | }); | |
200 | //this.reset(); | |
201 | } | |
202 | </script>"; | |
203 | ||
204 | print_hidden("op", "pluginhandler"); | |
205 | print_hidden("method", "save"); | |
206 | print_hidden("plugin", "af_zz_imgproxy"); | |
207 | ||
208 | $proxy_all = $this->host->get($this, "proxy_all"); | |
209 | print_checkbox("proxy_all", $proxy_all); | |
210 | ||
211 | print " <label for=\"proxy_all\">" . __("Enable proxy for all remote images.") . "</label>"; | |
212 | ||
213 | print "<p>"; print_button("submit", __("Save")); | |
214 | ||
215 | print "</form>"; | |
216 | ||
217 | print "</div>"; | |
218 | } | |
219 | ||
220 | function save() { | |
221 | $proxy_all = checkbox_to_sql_bool($_POST["proxy_all"]) == "true"; | |
222 | ||
223 | $this->host->set($this, "proxy_all", $proxy_all); | |
224 | ||
225 | echo __("Configuration saved"); | |
226 | } | |
227 | ||
c4ebf01e AD |
228 | function api_version() { |
229 | return 2; | |
230 | } | |
231 | } |