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I am using in my application(its in OSCOMMERCE) , When the user making payment its returning empty response. I debugged and find that it returning this error:

Protocol https not supported or disabled in libcurl

I am sending a prober url starts with https there is no space in that

My application in shared hosting server. My doubt is this is server side problem or Programming problem ?



Create a script called info.php and in it put <?php phpinfo(); ?>. Save it somewhere on your site so you can access it from a browser.

Find the curl section and check what Protocols are supported. If https is not listed, then cURL was not built with SSL support and you cannot use https.

You can also look in the very first section for Registered PHP Streams and see if https is listed. If so, then you can fallback to use PHP's socket functions or functions such as file_get_contents() or fopen with a context.

Since you mention you are on a shared host, request that your host recompile PHP so that both PHP and curl are built with OpenSSL support so you can use encryption, otherwise you will need to find another solution.

Friday, September 30, 2022

You have

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

This means that cURL will follow redirects and return you only the final page with no Location header.

To follow location manually:

function getWebPage($url, $redirectcallback = null){
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
    curl_setopt($ch, CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_NOBODY, false);
    curl_setopt($ch, CURLOPT_TIMEOUT, 10);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
    curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1) Gecko/20061024 BonEcho/2.0");

    $html = curl_exec($ch);
    $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    if ($http_code == 301 || $http_code == 302) {
        list($httpheader) = explode("rnrn", $html, 2);
        $matches = array();
        preg_match('/(Location:|URI:)(.*?)n/', $httpheader, $matches);
        $nurl = trim(array_pop($matches));
        $url_parsed = parse_url($nurl);
        if (isset($url_parsed)) {
            if($redirectcallback){ // callback
                 $redirectcallback($nurl, $url);
            $html = getWebPage($nurl, $redirectcallback);
    return $html;

function trackAllLocations($newUrl, $currentUrl){
    echo $currentUrl.' ---> '.$newUrl."rn";

getWebPage('some url with redirects', 'trackAllLocations');
Tuesday, September 6, 2022

Thanks for all the responses, I've ended up with this PHP/cURL-script for caching images (needed by Flash apps to circumvent a missing crossdomain.xml) - seems to work ok with CentOS 5 Linux and php-5.1.6-27.el5:


define('MIN_SIZE', 512);
define('MAX_SIZE', 1024 * 1024);
define('CACHE_DIR', '/var/www/cached_avatars/');

$img = urldecode($_GET['img']);
# img sanity checks omitted here
$cached = CACHE_DIR . md5($img);

if (is_readable($cached)) {
        $finfo  = finfo_open(FILEINFO_MIME);
        $mime   = finfo_file($finfo, $cached);
        $length = filesize($cached);
} else {
        $writefh = fopen($cached, 'wb');
        if ($writefh) {
                flock($writefh, LOCK_EX);
                $ch = curl_init($img);
                curl_setopt($ch, CURLOPT_FILE, $writefh);
                curl_setopt($ch, CURLOPT_HEADER, FALSE);
                curl_setopt($ch, CURLOPT_REFERER, $matches[1]);
                curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
                curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
                curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);

                $error    = curl_errno($ch);
                $length   = curl_getinfo($ch, CURLINFO_SIZE_DOWNLOAD);
                $mime     = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
                $is_image = ($mime != NULL &&
                             (stripos($mime, 'image/gif') !== FALSE ||
                              stripos($mime, 'image/png') !== FALSE ||
                              stripos($mime, 'image/jpg') !== FALSE ||
                              stripos($mime, 'image/jpeg') !== FALSE));

                if ($error || $length < MIN_SIZE || $length > MAX_SIZE || !$is_image) {
                        exit('Download failed: ' . $img);

$readfh = fopen($cached, 'rb');
if ($readfh) {
        header('Content-Type: ' . $mime);
        header('Content-Length: ' . $length);

        flock($readfh, LOCK_SH);

        while (!feof($readfh)) {
                $buf = fread($readfh, 8192);
                echo $buf;


Saturday, November 26, 2022

When you want to request an https resource, you need to use https.get, not http.get.

Sunday, August 21, 2022

Probably not what you want to hear, but they have known issues at the moment with ARM.

This workaround seems to work for me:

  • Directly download rustup-init from for your platform
  • env RUSTUP_USE_HYPER=1 ./rustup-init

It should also work to export RUSTUP_USE_HYPER=1 (assuming you aren't using tcsh) before running the rustup script, but the above is what I tested and used.

Saturday, October 22, 2022
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