https: HTTPS through HTTP proxy support (fixes #16165)

modules/access/http/access.c

@@ -24,6 +24,8 @@
 
 #include <assert.h>
 #include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
 
 #include <vlc_common.h>
 #include <vlc_access.h>
@@ -160,10 +162,13 @@ static int Open(vlc_object_t *obj)
 {
     access_t *access = (access_t *)obj;
 
+    if (!strcasecmp(access->psz_access, "http"))
+    {
         char *proxy = vlc_getProxyUrl(access->psz_url);
         free(proxy);
         if (proxy != NULL)
             return VLC_EGENERIC; /* FIXME not implemented yet */
+    }
 
     access_sys_t *sys = malloc(sizeof (*sys));
     int ret = VLC_ENOMEM;

modules/access/http/connmgr.c

@@ -24,6 +24,7 @@
 
 #include <assert.h>
 #include <vlc_common.h>
+#include <vlc_network.h>
 #include <vlc_tls.h>
 #include <vlc_interrupt.h>
 #include "transport.h"
@@ -42,11 +43,39 @@ struct vlc_https_connecting
     vlc_sem_t done;
 };
 
+static char *vlc_https_proxy_find(const char *hostname, unsigned port)
+{
+    const char *fmt;
+    char *url, *proxy = NULL;
+    int canc = vlc_savecancel();
+
+    if (strchr(hostname, ':') != NULL)
+        fmt = port ? "https://[%s]:%u" : "https://[%s]";
+    else
+        fmt = port ? "https://%s:%u" : "https://%s";
+
+    if (likely(asprintf(&url, fmt, hostname, port) >= 0))
+    {
+        proxy = vlc_getProxyUrl(url);
+        free(url);
+    }
+    vlc_restorecancel(canc);
+    return proxy;
+}
+
 static void *vlc_https_connect_thread(void *data)
 {
     struct vlc_https_connecting *c = data;
     vlc_tls_t *tls;
 
+    char *proxy = vlc_https_proxy_find(c->host, c->port);
+    if (proxy != NULL)
+    {
+        tls = vlc_https_connect_proxy(c->creds, c->host, c->port, &c->http2,
+                                      proxy);
+        free(proxy);
+    }
+    else
         tls = vlc_https_connect(c->creds, c->host, c->port, &c->http2);
     vlc_sem_post(&c->done);
     return tls;