<?php
/**
- * Extract title from an HTML document.
+ * Get cURL callback function for CURLOPT_WRITEFUNCTION
*
- * @param string $html HTML content where to look for a title.
+ * @param string $charset to extract from the downloaded page (reference)
+ * @param string $title to extract from the downloaded page (reference)
+ * @param string $curlGetInfo Optionnaly overrides curl_getinfo function
*
- * @return bool|string Extracted title if found, false otherwise.
+ * @return Closure
*/
-function html_extract_title($html)
+function get_curl_download_callback(&$charset, &$title, $curlGetInfo = 'curl_getinfo')
{
- if (preg_match('!<title.*?>(.*?)</title>!is', $html, $matches)) {
- return trim(str_replace("\n", '', $matches[1]));
- }
- return false;
+ $isRedirected = false;
+ /**
+ * cURL callback function for CURLOPT_WRITEFUNCTION (called during the download).
+ *
+ * While downloading the remote page, we check that the HTTP code is 200 and content type is 'html/text'
+ * Then we extract the title and the charset and stop the download when it's done.
+ *
+ * @param resource $ch cURL resource
+ * @param string $data chunk of data being downloaded
+ *
+ * @return int|bool length of $data or false if we need to stop the download
+ */
+ return function (&$ch, $data) use ($curlGetInfo, &$charset, &$title, &$isRedirected) {
+ $responseCode = $curlGetInfo($ch, CURLINFO_RESPONSE_CODE);
+ if (!empty($responseCode) && in_array($responseCode, [301, 302])) {
+ $isRedirected = true;
+ return strlen($data);
+ }
+ if (!empty($responseCode) && $responseCode !== 200) {
+ return false;
+ }
+ // After a redirection, the content type will keep the previous request value
+ // until it finds the next content-type header.
+ if (! $isRedirected || strpos(strtolower($data), 'content-type') !== false) {
+ $contentType = $curlGetInfo($ch, CURLINFO_CONTENT_TYPE);
+ }
+ if (!empty($contentType) && strpos($contentType, 'text/html') === false) {
+ return false;
+ }
+ if (!empty($contentType) && empty($charset)) {
+ $charset = header_extract_charset($contentType);
+ }
+ if (empty($charset)) {
+ $charset = html_extract_charset($data);
+ }
+ if (empty($title)) {
+ $title = html_extract_title($data);
+ }
+ // We got everything we want, stop the download.
+ if (!empty($responseCode) && !empty($contentType) && !empty($charset) && !empty($title)) {
+ return false;
+ }
+
+ return strlen($data);
+ };
}
/**
- * Determine charset from downloaded page.
- * Priority:
- * 1. HTTP headers (Content type).
- * 2. HTML content page (tag <meta charset>).
- * 3. Use a default charset (default: UTF-8).
+ * Extract title from an HTML document.
*
- * @param array $headers HTTP headers array.
- * @param string $htmlContent HTML content where to look for charset.
- * @param string $defaultCharset Default charset to apply if other methods failed.
+ * @param string $html HTML content where to look for a title.
*
- * @return string Determined charset.
+ * @return bool|string Extracted title if found, false otherwise.
*/
-function get_charset($headers, $htmlContent, $defaultCharset = 'utf-8')
+function html_extract_title($html)
{
- if ($charset = headers_extract_charset($headers)) {
- return $charset;
- }
-
- if ($charset = html_extract_charset($htmlContent)) {
- return $charset;
+ if (preg_match('!<title.*?>(.*?)</title>!is', $html, $matches)) {
+ return trim(str_replace("\n", '', $matches[1]));
}
-
- return $defaultCharset;
+ return false;
}
/**
- * Extract charset from HTTP headers if it's defined.
+ * Extract charset from HTTP header if it's defined.
*
- * @param array $headers HTTP headers array.
+ * @param string $header HTTP header Content-Type line.
*
* @return bool|string Charset string if found (lowercase), false otherwise.
*/
-function headers_extract_charset($headers)
+function header_extract_charset($header)
{
- if (! empty($headers['Content-Type']) && strpos($headers['Content-Type'], 'charset=') !== false) {
- preg_match('/charset="?([^; ]+)/i', $headers['Content-Type'], $match);
- if (! empty($match[1])) {
- return strtolower(trim($match[1]));
- }
+ preg_match('/charset="?([^; ]+)/i', $header, $match);
+ if (! empty($match[1])) {
+ return strtolower(trim($match[1]));
}
return false;
*
* @param string $text input string.
* @param string $redirector if a redirector is set, use it to gerenate links.
+ * @param bool $urlEncode Use `urlencode()` on the URL after the redirector or not.
*
* @return string returns $text with all links converted to HTML links.
*
* @see Function inspired from http://www.php.net/manual/en/function.preg-replace.php#85722
*/
-function text2clickable($text, $redirector = '')
+function text2clickable($text, $redirector = '', $urlEncode = true)
{
$regex = '!(((?:https?|ftp|file)://|apt:|magnet:)\S+[a-z0-9\(\)]/?)!si';
// Redirector is set, urlencode the final URL.
return preg_replace_callback(
$regex,
- function ($matches) use ($redirector) {
- return '<a href="' . $redirector . urlencode($matches[1]) .'">'. $matches[1] .'</a>';
+ function ($matches) use ($redirector, $urlEncode) {
+ $url = $urlEncode ? urlencode($matches[1]) : $matches[1];
+ return '<a href="' . $redirector . $url .'">'. $matches[1] .'</a>';
},
$text
);
*
* @param string $description shaare's description.
* @param string $redirector if a redirector is set, use it to gerenate links.
+ * @param bool $urlEncode Use `urlencode()` on the URL after the redirector or not.
* @param string $indexUrl URL to Shaarli's index.
- *
+
* @return string formatted description.
*/
-function format_description($description, $redirector = '', $indexUrl = '') {
- return nl2br(space2nbsp(hashtag_autolink(text2clickable($description, $redirector), $indexUrl)));
+function format_description($description, $redirector = '', $urlEncode = true, $indexUrl = '')
+{
+ return nl2br(space2nbsp(hashtag_autolink(text2clickable($description, $redirector, $urlEncode), $indexUrl)));
}
/**
projects / github / shaarli / Shaarli.git / blobdiff