Set cURL as default in HTTP fetching, a fallback method and consistency fixup between both methods
This commit is contained in:
julienCXX
parent
c7a42ab1d9
commit
634783f916
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@ -1,6 +1,7 @@
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<?php
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/**
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* GET an HTTP URL to retrieve its content
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* Uses the cURL library or a fallback method
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*
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* @param string $url URL to get (http://...)
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* @param int $timeout network timeout (in seconds)
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@ -20,38 +21,177 @@
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* echo 'There was an error: '.htmlspecialchars($headers[0]);
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* }
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*
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* @see http://php.net/manual/en/function.file-get-contents.php
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* @see http://php.net/manual/en/function.stream-context-create.php
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* @see http://php.net/manual/en/function.get-headers.php
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* @see https://secure.php.net/manual/en/ref.curl.php
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* @see https://secure.php.net/manual/en/functions.anonymous.php
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* @see https://secure.php.net/manual/en/function.preg-split.php
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* @see https://secure.php.net/manual/en/function.explode.php
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* @see http://stackoverflow.com/q/17641073
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* @see http://stackoverflow.com/q/9183178
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* @see http://stackoverflow.com/q/1462720
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*/
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function get_http_response($url, $timeout = 30, $maxBytes = 4194304)
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{
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$urlObj = new Url($url);
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$cleanUrl = $urlObj->idnToAscii();
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if (! filter_var($cleanUrl, FILTER_VALIDATE_URL) || ! $urlObj->isHttp()) {
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if (!filter_var($cleanUrl, FILTER_VALIDATE_URL) || !$urlObj->isHttp()) {
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return array(array(0 => 'Invalid HTTP Url'), false);
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}
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$userAgent =
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'Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:45.0)'
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. ' Gecko/20100101 Firefox/45.0';
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$acceptLanguage =
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substr(setlocale(LC_COLLATE, 0), 0, 2) . ',en-US;q=0.7,en;q=0.3';
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$maxRedirs = 3;
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if (!function_exists('curl_init')) {
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return get_http_response_fallback(
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$cleanUrl,
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$timeout,
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$maxBytes,
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$userAgent,
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$acceptLanguage,
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$maxRedirs
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);
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}
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$ch = curl_init($cleanUrl);
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if ($ch === false) {
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return array(array(0 => 'curl_init() error'), false);
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}
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// General cURL settings
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curl_setopt($ch, CURLOPT_AUTOREFERER, true);
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
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curl_setopt($ch, CURLOPT_HEADER, true);
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curl_setopt(
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$ch,
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CURLOPT_HTTPHEADER,
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array('Accept-Language: ' . $acceptLanguage)
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);
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curl_setopt($ch, CURLOPT_MAXREDIRS, $maxRedirs);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
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curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);
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// Max download size management
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curl_setopt($ch, CURLOPT_BUFFERSIZE, 1024);
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curl_setopt($ch, CURLOPT_NOPROGRESS, false);
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curl_setopt($ch, CURLOPT_PROGRESSFUNCTION,
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function($arg0, $arg1, $arg2, $arg3, $arg4 = 0) use ($maxBytes)
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{
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if (version_compare(phpversion(), '5.5', '<')) {
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// PHP version lower than 5.5
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// Callback has 4 arguments
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$downloaded = $arg1;
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} else {
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// Callback has 5 arguments
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$downloaded = $arg2;
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}
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// Non-zero return stops downloading
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return ($downloaded > $maxBytes) ? 1 : 0;
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}
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);
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$response = curl_exec($ch);
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$errorNo = curl_errno($ch);
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$errorStr = curl_error($ch);
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$headSize = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
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curl_close($ch);
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if ($response === false) {
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if ($errorNo == CURLE_COULDNT_RESOLVE_HOST) {
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/*
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* Workaround to match fallback method behaviour
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* Removing this would require updating
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* GetHttpUrlTest::testGetInvalidRemoteUrl()
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*/
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return array(false, false);
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}
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return array(array(0 => 'curl_exec() error: ' . $errorStr), false);
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}
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// Formatting output like the fallback method
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$rawHeaders = substr($response, 0, $headSize);
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// Keep only headers from latest redirection
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$rawHeadersArrayRedirs = explode("\r\n\r\n", trim($rawHeaders));
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$rawHeadersLastRedir = end($rawHeadersArrayRedirs);
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$content = substr($response, $headSize);
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$headers = array();
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foreach (preg_split('~[\r\n]+~', $rawHeadersLastRedir) as $line) {
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if (empty($line) or ctype_space($line)) {
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continue;
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}
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$splitLine = explode(': ', $line, 2);
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if (count($splitLine) > 1) {
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$key = $splitLine[0];
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$value = $splitLine[1];
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if (array_key_exists($key, $headers)) {
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if (!is_array($headers[$key])) {
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$headers[$key] = array(0 => $headers[$key]);
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}
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$headers[$key][] = $value;
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} else {
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$headers[$key] = $value;
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}
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} else {
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$headers[] = $splitLine[0];
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}
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}
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return array($headers, $content);
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}
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/**
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* GET an HTTP URL to retrieve its content (fallback method)
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*
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* @param string $cleanUrl URL to get (http://... valid and in ASCII form)
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* @param int $timeout network timeout (in seconds)
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* @param int $maxBytes maximum downloaded bytes
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* @param string $userAgent "User-Agent" header
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* @param string $acceptLanguage "Accept-Language" header
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* @param int $maxRedr maximum amount of redirections followed
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*
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* @return array HTTP response headers, downloaded content
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*
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* Output format:
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* [0] = associative array containing HTTP response headers
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* [1] = URL content (downloaded data)
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*
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* @see http://php.net/manual/en/function.file-get-contents.php
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* @see http://php.net/manual/en/function.stream-context-create.php
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* @see http://php.net/manual/en/function.get-headers.php
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*/
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function get_http_response_fallback(
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$cleanUrl,
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$timeout,
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$maxBytes,
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$userAgent,
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$acceptLanguage,
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$maxRedr
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) {
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$options = array(
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'http' => array(
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'method' => 'GET',
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'timeout' => $timeout,
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'user_agent' => 'Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:45.0)'
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.' Gecko/20100101 Firefox/45.0',
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'accept_language' => substr(setlocale(LC_COLLATE, 0), 0, 2) . ',en-US;q=0.7,en;q=0.3',
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'user_agent' => $userAgent,
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'header' => "Accept: */*\r\n"
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. 'Accept-Language: ' . $acceptLanguage
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)
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);
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stream_context_set_default($options);
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list($headers, $finalUrl) = get_redirected_headers($cleanUrl);
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list($headers, $finalUrl) = get_redirected_headers($cleanUrl, $maxRedr);
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if (! $headers || strpos($headers[0], '200 OK') === false) {
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$options['http']['request_fulluri'] = true;
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stream_context_set_default($options);
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list($headers, $finalUrl) = get_redirected_headers($cleanUrl);
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list($headers, $finalUrl) = get_redirected_headers($cleanUrl, $maxRedr);
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}
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if (! $headers || strpos($headers[0], '200 OK') === false) {
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if (! $headers) {
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return array($headers, false);
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}
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