Lighttpd

(FYI, HTTP method CONNECT is HTTP/1.1, not HTTP/1.0)

lighttpd does not directly handle HTTP method CONNECT, but lighttpd can be used with HTTP method CONNECT.

If a file exists in the configured document root, e.g. /srv/htdocs/www/127.0.0.1:25, which matches the target authority (e.g. 127.0.01:25) in CONNECT, then dynamic handlers such as CGI, FastCGI, SCGI, proxy can be configured to handle the request, with minor modifications made to lighttpd (similar to those recently made to support HTTP Upgrade in mod_proxy). Care MUST be taken to require proper authentication and/or other restrictions before blindly passing data.

Here is an untested patch against mod_proxy for lighttpd 1.4.46 which might handle a CONNECT request, after the admin created the file in the document root (as above) and configured mod_proxy to explicitly connect to the specific target server and port. It does not support omitting the HTTP response to CONNECT (configurable in user-submitted patch attachment), as omitting the HTTP response header is a violation of the HTTP protocol.

--- a/src/mod_proxy.c
+++ b/src/mod_proxy.c
@@ -1182,11 +1182,23 @@ static void proxy_set_Forwarded(connection *con, const unsigned int flags) {

 static int proxy_create_env(server *srv, handler_ctx *hctx) {
        connection *con   = hctx->remote_conn;
-       buffer *b = buffer_init();
+       buffer *b;
        const int remap_headers = (NULL != hctx->remap_hdrs.urlpaths
                                   || NULL != hctx->remap_hdrs.hosts_request);
        const int upgrade = hctx->remap_hdrs.upgrade
                            && (NULL != array_get_element(con->request.headers, "Upgrade"));
+
+       /* XXX: should check if enabled by hctx->host property
+        *      (configured in proxy.server directive) */
+       if (con->request.http_method == HTTP_METHOD_CONNECT) {
+               con->http_status = 200; /* OK */
+               con->file_started = 1;
+               hctx->wb_reqlen = -1;
+               http_response_upgrade_read_body_unknown(srv, con);
+               return 0;
+       }
+
+       b = buffer_init();
        buffer_string_prepare_copy(b, 8192-1);

        /* build header */

If others find this useful, please add a note here, and we may consider adding this functionality to lighttpd mod_proxy, along with a config directive to enable this behavior. For now, this issue is being marked "Missing Feedback" as it is a very old request.