* [1] = URL content (downloaded data)
*
* Example:
- * list($headers, $data) = get_http_url('http://sebauvage.net/');
+ * list($headers, $data) = get_http_response('http://sebauvage.net/');
* if (strpos($headers[0], '200 OK') !== false) {
* echo 'Data type: '.htmlspecialchars($headers['Content-Type']);
* } else {
* @see http://php.net/manual/en/function.stream-context-create.php
* @see http://php.net/manual/en/function.get-headers.php
*/
-function get_http_url($url, $timeout = 30, $maxBytes = 4194304)
+function get_http_response($url, $timeout = 30, $maxBytes = 4194304)
{
+ $urlObj = new Url($url);
+ $cleanUrl = $urlObj->idnToAscii();
+
+ if (! filter_var($cleanUrl, FILTER_VALIDATE_URL) || ! $urlObj->isHttp()) {
+ return array(array(0 => 'Invalid HTTP Url'), false);
+ }
+
$options = array(
'http' => array(
'method' => 'GET',
'timeout' => $timeout,
- 'user_agent' => 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:23.0)'
- .' Gecko/20100101 Firefox/23.0'
+ 'user_agent' => 'Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:45.0)'
+ .' Gecko/20100101 Firefox/45.0',
+ 'accept_language' => substr(setlocale(LC_COLLATE, 0), 0, 2) . ',en-US;q=0.7,en;q=0.3',
)
);
- $context = stream_context_create($options);
+ stream_context_set_default($options);
+ list($headers, $finalUrl) = get_redirected_headers($cleanUrl);
+ if (! $headers || strpos($headers[0], '200 OK') === false) {
+ $options['http']['request_fulluri'] = true;
+ stream_context_set_default($options);
+ list($headers, $finalUrl) = get_redirected_headers($cleanUrl);
+ }
+
+ if (! $headers || strpos($headers[0], '200 OK') === false) {
+ return array($headers, false);
+ }
try {
// TODO: catch Exception in calling code (thumbnailer)
- $content = file_get_contents($url, false, $context, -1, $maxBytes);
+ $context = stream_context_create($options);
+ $content = file_get_contents($finalUrl, false, $context, -1, $maxBytes);
} catch (Exception $exc) {
return array(array(0 => 'HTTP Error'), $exc->getMessage());
}
- if (!$content) {
- return array(array(0 => 'HTTP Error'), '');
+ return array($headers, $content);
+}
+
+/**
+ * Retrieve HTTP headers, following n redirections (temporary and permanent ones).
+ *
+ * @param string $url initial URL to reach.
+ * @param int $redirectionLimit max redirection follow.
+ *
+ * @return array HTTP headers, or false if it failed.
+ */
+function get_redirected_headers($url, $redirectionLimit = 3)
+{
+ $headers = get_headers($url, 1);
+ if (!empty($headers['location']) && empty($headers['Location'])) {
+ $headers['Location'] = $headers['location'];
+ }
+
+ // Headers found, redirection found, and limit not reached.
+ if ($redirectionLimit-- > 0
+ && !empty($headers)
+ && (strpos($headers[0], '301') !== false || strpos($headers[0], '302') !== false)
+ && !empty($headers['Location'])) {
+
+ $redirection = is_array($headers['Location']) ? end($headers['Location']) : $headers['Location'];
+ if ($redirection != $url) {
+ $redirection = getAbsoluteUrl($url, $redirection);
+ return get_redirected_headers($redirection, $redirectionLimit);
+ }
}
- return array(get_headers($url, 1), $content);
+ return array($headers, $url);
+}
+
+/**
+ * Get an absolute URL from a complete one, and another absolute/relative URL.
+ *
+ * @param string $originalUrl The original complete URL.
+ * @param string $newUrl The new one, absolute or relative.
+ *
+ * @return string Final URL:
+ * - $newUrl if it was already an absolute URL.
+ * - if it was relative, absolute URL from $originalUrl path.
+ */
+function getAbsoluteUrl($originalUrl, $newUrl)
+{
+ $newScheme = parse_url($newUrl, PHP_URL_SCHEME);
+ // Already an absolute URL.
+ if (!empty($newScheme)) {
+ return $newUrl;
+ }
+
+ $parts = parse_url($originalUrl);
+ $final = $parts['scheme'] .'://'. $parts['host'];
+ $final .= (!empty($parts['port'])) ? $parts['port'] : '';
+ $final .= '/';
+ if ($newUrl[0] != '/') {
+ $final .= substr(ltrim($parts['path'], '/'), 0, strrpos($parts['path'], '/'));
+ }
+ $final .= ltrim($newUrl, '/');
+ return $final;
+}
+
+/**
+ * Returns the server's base URL: scheme://domain.tld[:port]
+ *
+ * @param array $server the $_SERVER array
+ *
+ * @return string the server's base URL
+ *
+ * @see http://www.ietf.org/rfc/rfc7239.txt
+ * @see http://www.ietf.org/rfc/rfc6648.txt
+ * @see http://stackoverflow.com/a/3561399
+ * @see http://stackoverflow.com/q/452375
+ */
+function server_url($server)
+{
+ $scheme = 'http';
+ $port = '';
+
+ // Shaarli is served behind a proxy
+ if (isset($server['HTTP_X_FORWARDED_PROTO'])) {
+ // Keep forwarded scheme
+ if (strpos($server['HTTP_X_FORWARDED_PROTO'], ',') !== false) {
+ $schemes = explode(',', $server['HTTP_X_FORWARDED_PROTO']);
+ $scheme = trim($schemes[0]);
+ } else {
+ $scheme = $server['HTTP_X_FORWARDED_PROTO'];
+ }
+
+ if (isset($server['HTTP_X_FORWARDED_PORT'])) {
+ // Keep forwarded port
+ if (strpos($server['HTTP_X_FORWARDED_PORT'], ',') !== false) {
+ $ports = explode(',', $server['HTTP_X_FORWARDED_PORT']);
+ $port = ':' . trim($ports[0]);
+ } else {
+ $port = ':' . $server['HTTP_X_FORWARDED_PORT'];
+ }
+ }
+
+ return $scheme.'://'.$server['SERVER_NAME'].$port;
+ }
+
+ // SSL detection
+ if ((! empty($server['HTTPS']) && strtolower($server['HTTPS']) == 'on')
+ || (isset($server['SERVER_PORT']) && $server['SERVER_PORT'] == '443')) {
+ $scheme = 'https';
+ }
+
+ // Do not append standard port values
+ if (($scheme == 'http' && $server['SERVER_PORT'] != '80')
+ || ($scheme == 'https' && $server['SERVER_PORT'] != '443')) {
+ $port = ':'.$server['SERVER_PORT'];
+ }
+
+ return $scheme.'://'.$server['SERVER_NAME'].$port;
+}
+
+/**
+ * Returns the absolute URL of the current script, without the query
+ *
+ * If the resource is "index.php", then it is removed (for better-looking URLs)
+ *
+ * @param array $server the $_SERVER array
+ *
+ * @return string the absolute URL of the current script, without the query
+ */
+function index_url($server)
+{
+ $scriptname = $server['SCRIPT_NAME'];
+ if (endsWith($scriptname, 'index.php')) {
+ $scriptname = substr($scriptname, 0, -9);
+ }
+ return server_url($server) . $scriptname;
+}
+
+/**
+ * Returns the absolute URL of the current script, with the query
+ *
+ * If the resource is "index.php", then it is removed (for better-looking URLs)
+ *
+ * @param array $server the $_SERVER array
+ *
+ * @return string the absolute URL of the current script, with the query
+ */
+function page_url($server)
+{
+ if (! empty($server['QUERY_STRING'])) {
+ return index_url($server).'?'.$server['QUERY_STRING'];
+ }
+ return index_url($server);
}
projects / github / shaarli / Shaarli.git / blobdiff