static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,

                    AVDictionary *opts, AVDictionary *opts2, int *is_http)

{

    HLSContext *c = s->priv_data;

    AVDictionary *tmp = NULL;

    const char *proto_name = NULL;

    int ret;



    av_dict_copy(&tmp, opts, 0);

    av_dict_copy(&tmp, opts2, 0);



    if (av_strstart(url, "crypto", NULL)) {

        if (url[6] == '+' || url[6] == ':')

            proto_name = avio_find_protocol_name(url + 7);

    }



    if (!proto_name)

        proto_name = avio_find_protocol_name(url);



    if (!proto_name)

        return AVERROR_INVALIDDATA;



    // only http(s) & file are allowed

    if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, "file", NULL))

        return AVERROR_INVALIDDATA;

    if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')

        ;

    else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')

        ;

    else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))

        return AVERROR_INVALIDDATA;



    ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);

    if (ret >= 0) {

        // update cookies on http response with setcookies.

        char *new_cookies = NULL;



        if (!(s->flags & AVFMT_FLAG_CUSTOM_IO))

            av_opt_get(*pb, "cookies", AV_OPT_SEARCH_CHILDREN, (uint8_t**)&new_cookies);



        if (new_cookies) {

            av_free(c->cookies);

            c->cookies = new_cookies;

        }



        av_dict_set(&opts, "cookies", c->cookies, 0);

    }



    av_dict_free(&tmp);



    if (is_http)

        *is_http = av_strstart(proto_name, "http", NULL);



    return ret;

}
