How to connect to a secure (https) proxy with curl

问题:

Modern browsers support HTTPS proxies that can be connected to via a PAC file (see https://www.igvita.com/2012/06/25/spdy-and-secure-proxy-support-in-google-chrome/ if you're not familiar).

I'm trying to replicate the same thing and connect to such a proxy via php CURL, but I'm simply getting a blank response, no headers or content.

My code is as follows:

$url = "http://checkip.dyndns.com";
$proxy = "proxy.domain.com:443";

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL , 1);
curl_setopt($ch, CURLOPT_PROXY, $proxy);
curl_setopt($ch, CURLOPT_PROXYUSERPWD, 'test:test');
curl_setopt($ch, CURLOPT_PROXYTYPE, "CURLPROXY_HTTP");
$response = curl_exec($ch);
curl_close($ch);

echo $response;

Any ideas?

回答1:

If anyone is interested, the solution to this is to use spdycat instead of curl: https://github.com/tatsuhiro-t/spdylay

回答2:

There's no support for connecting to a proxy with HTTPS with curl yet. There is a work-in-progress branch in git though: https://github.com/bagder/curl/tree/HTTPS-proxy

We will appreciate help to get that in shape to merge.