PHP curl::get_cacert方法代码示例

/**
 * Fetches content of file from Internet (using proxy if defined). Uses cURL extension if present.
 * Due to security concerns only downloads from http(s) sources are supported.
 *
 * @todo MDL-31073 add version test for '7.10.5'
 * @category files
 * @param string $url file url starting with http(s)://
 * @param array $headers http headers, null if none. If set, should be an
 *   associative array of header name => value pairs.
 * @param array $postdata array means use POST request with given parameters
 * @param bool $fullresponse return headers, responses, etc in a similar way snoopy does
 *   (if false, just returns content)
 * @param int $timeout timeout for complete download process including all file transfer
 *   (default 5 minutes)
 * @param int $connecttimeout timeout for connection to server; this is the timeout that
 *   usually happens if the remote server is completely down (default 20 seconds);
 *   may not work when using proxy
 * @param bool $skipcertverify If true, the peer's SSL certificate will not be checked.
 *   Only use this when already in a trusted location.
 * @param string $tofile store the downloaded content to file instead of returning it.
 * @param bool $calctimeout false by default, true enables an extra head request to try and determine
 *   filesize and appropriately larger timeout based on $CFG->curltimeoutkbitrate
 * @return mixed false if request failed or content of the file as string if ok. True if file downloaded into $tofile successfully.
 */
function download_file_content($url, $headers = null, $postdata = null, $fullresponse = false, $timeout = 300, $connecttimeout = 20, $skipcertverify = false, $tofile = NULL, $calctimeout = false)
{
    global $CFG;
    // some extra security
    $newlines = array("\r", "\n");
    if (is_array($headers)) {
        foreach ($headers as $key => $value) {
            $headers[$key] = str_replace($newlines, '', $value);
        }
    }
    $url = str_replace($newlines, '', $url);
    if (!preg_match('|^https?://|i', $url)) {
        if ($fullresponse) {
            $response = new stdClass();
            $response->status = 0;
            $response->headers = array();
            $response->response_code = 'Invalid protocol specified in url';
            $response->results = '';
            $response->error = 'Invalid protocol specified in url';
            return $response;
        } else {
            return false;
        }
    }
    // check if proxy (if used) should be bypassed for this url
    $proxybypass = is_proxybypass($url);
    if (!($ch = curl_init($url))) {
        debugging('Can not init curl.');
        return false;
    }
    // set extra headers
    if (is_array($headers)) {
        $headers2 = array();
        foreach ($headers as $key => $value) {
            $headers2[] = "{$key}: {$value}";
        }
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers2);
    }
    if ($skipcertverify) {
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    }
    // use POST if requested
    if (is_array($postdata)) {
        $postdata = format_postdata_for_curlcall($postdata);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
    }
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $connecttimeout);
    if ($cacert = curl::get_cacert()) {
        curl_setopt($ch, CURLOPT_CAINFO, $cacert);
    }
    if (!ini_get('open_basedir') and !ini_get('safe_mode')) {
        // TODO: add version test for '7.10.5'
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
    }
    if (!empty($CFG->proxyhost) and !$proxybypass) {
        // SOCKS supported in PHP5 only
        if (!empty($CFG->proxytype) and $CFG->proxytype == 'SOCKS5') {
            if (defined('CURLPROXY_SOCKS5')) {
                curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
            } else {
                curl_close($ch);
                if ($fullresponse) {
                    $response = new stdClass();
                    $response->status = '0';
                    $response->headers = array();
                    $response->response_code = 'SOCKS5 proxy is not supported in PHP4';
                    $response->results = '';
                    $response->error = 'SOCKS5 proxy is not supported in PHP4';
                    return $response;
                } else {
                    debugging("SOCKS5 proxy is not supported in PHP4.", DEBUG_ALL);
                    return false;
//.........这里部分代码省略.........