On Fri, 17 Jun 2022, Nil Admirari wrote:

1. getenv() is replaced with getenv_utf8() across libavformat.
2. New versions of AviSynth+ are now called with UTF-8 filenames.
3. Old versions of AviSynth are still using ANSI strings,
  but MAX_PATH limit on filename is removed.
---
libavformat/avisynth.c    | 39 +++++++++++++++++++++++++++------------
libavformat/http.c        | 20 +++++++++++++-------
libavformat/ipfsgateway.c | 35 +++++++++++++++++++++++------------
libavformat/tls.c         | 11 +++++++++--
4 files changed, 72 insertions(+), 33 deletions(-)

@@ -198,6 +199,7 @@ void ff_http_init_auth_state(URLContext *dest, const 
URLContext *src)
static int http_open_cnx_internal(URLContext *h, AVDictionary **options)
{
    const char *path, *proxy_path, *lower_proto = "tcp", *local_path;
+    char *env_http_proxy, *env_no_proxy;
    char *hashmark;
    char hostname[1024], hoststr[1024], proto[10];
    char auth[1024], proxyauth[1024] = "";
@@ -211,9 +213,13 @@ static int http_open_cnx_internal(URLContext *h, 
AVDictionary **options)
                 path1, sizeof(path1), s->location);
    ff_url_join(hoststr, sizeof(hoststr), NULL, NULL, hostname, port, NULL);

-    proxy_path = s->http_proxy ? s->http_proxy : getenv("http_proxy");
-    use_proxy  = !ff_http_match_no_proxy(getenv("no_proxy"), hostname) &&
+    env_http_proxy = getenv_utf8("http_proxy");
+    proxy_path = s->http_proxy ? s->http_proxy : env_http_proxy;
+
+    env_no_proxy = getenv_utf8("no_proxy");
+    use_proxy  = !ff_http_match_no_proxy(env_no_proxy, hostname) &&
                 proxy_path && av_strstart(proxy_path, "http://";, NULL);
+    av_freep(&env_no_proxy);

    if (!strcmp(proto, "https")) {
        lower_proto = "tls";
@@ -224,7 +230,7 @@ static int http_open_cnx_internal(URLContext *h, 
AVDictionary **options)
        if (s->http_proxy) {
            err = av_dict_set(options, "http_proxy", s->http_proxy, 0);
            if (err < 0)
-                return err;
+                goto end;
        }
    }
    if (port < 0)
@@ -259,12 +265,12 @@ static int http_open_cnx_internal(URLContext *h, 
AVDictionary **options)
        err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE,
                                   &h->interrupt_callback, options,
                                   h->protocol_whitelist, 
h->protocol_blacklist, h);
-        if (err < 0)
-            return err;
    }

-    return http_connect(h, path, local_path, hoststr,
-                        auth, proxyauth);
+end:
+    av_freep(&env_http_proxy);
+    return err < 0 ? err : http_connect(
+        h, path, local_path, hoststr, auth, proxyauth);
}

FWIW - I wasn't entirely sure we can conclude that we always pass through a case that initializes the err variable here, so just to be sure, I locally amended this patch to initialize the err variable to 0 too.

// Martin

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