Function get_cookies

libavformat/http.c:1346–1428

* Create a string containing cookie values for use as a HTTP cookie header * field value for a particular path and domain from the cookie values stored in * the HTTP protocol context. The cookie string is stored in *cookies, and may * be NULL if there are no valid cookies. * * @return a negative value if an error condition occurred, 0 otherwise */

 * @return a negative value if an error condition occurred, 0 otherwise
 */
static int get_cookies(HTTPContext *s, char **cookies, const char *path,
                       const char *domain)
{
    // cookie strings will look like Set-Cookie header field values.  Multiple
    // Set-Cookie fields will result in multiple values delimited by a newline
    int ret = 0;
    char *cookie, *set_cookies, *next;
    char *saveptr = NULL;

    // destroy any cookies in the dictionary.
    av_dict_free(&s->cookie_dict);

    if (!s->cookies)
        return 0;

    next = set_cookies = av_strdup(s->cookies);
    if (!next)
        return AVERROR(ENOMEM);

    *cookies = NULL;
    while ((cookie = av_strtok(next, "\n", &saveptr)) && !ret) {
        AVDictionary *cookie_params = NULL;
        const AVDictionaryEntry *cookie_entry, *e;

        next = NULL;
        // store the cookie in a dict in case it is updated in the response
        if (parse_cookie(s, cookie, &s->cookie_dict))
            av_log(s, AV_LOG_WARNING, "Unable to parse '%s'\n", cookie);

        // continue on to the next cookie if this one cannot be parsed
        if (parse_set_cookie(cookie, &cookie_params))
            goto skip_cookie;

        // if the cookie has no value, skip it
        cookie_entry = av_dict_iterate(cookie_params, NULL);
        if (!cookie_entry || !cookie_entry->value)
            goto skip_cookie;

        // if the cookie has expired, don't add it
        if ((e = av_dict_get(cookie_params, "expires", NULL, 0)) && e->value) {
            struct tm tm_buf = {0};
            if (!parse_http_date(e->value, &tm_buf)) {
                if (av_timegm(&tm_buf) < av_gettime() / 1000000)
                    goto skip_cookie;
            }
        }

        // if no domain in the cookie assume it applied to this request
        if ((e = av_dict_get(cookie_params, "domain", NULL, 0)) && e->value) {
            // find the offset comparison is on the min domain (b.com, not a.b.com)
            int domain_offset = strlen(domain) - strlen(e->value);
            if (domain_offset < 0)
                goto skip_cookie;

            // match the cookie domain
            if (av_strcasecmp(&domain[domain_offset], e->value))
                goto skip_cookie;
        }