struct vlc_http_msg *vlc_http_res_open(struct vlc_http_resource *res,
void *opaque)
{
struct vlc_http_msg *req;
retry:
req = vlc_http_res_req(res, opaque);
if (unlikely(req == NULL))
return NULL;
struct vlc_http_msg *resp = vlc_http_mgr_request(res->manager, res->secure,
res->host, res->port, req);
vlc_http_msg_destroy(req);
resp = vlc_http_msg_get_final(resp);
if (resp == NULL)
return NULL;
vlc_http_msg_get_cookies(resp, vlc_http_mgr_get_jar(res->manager),
res->secure, res->host, res->path);
int status = vlc_http_msg_get_status(resp);
if (status < 200 || status >= 599)
goto fail;
if (status == 406 && res->negotiate)
{ /* Not Acceptable: Content negotiation failed. Normally it means
* one (or more) Accept or Accept-* header line does not match any
* representation of the entity. So we set a flag to remove those
* header lines (unless they accept everything), and retry.
* In principles, it could be any header line, and the server can
* pass Vary to clarify. It cannot be caused by If-*, Range, TE or the
* other transfer- rather than representation-affecting header lines.
*/
vlc_http_msg_destroy(resp);
res->negotiate = false;
goto retry;
}
if (res->cbs->response_validate(res, resp, opaque))
goto fail;
return resp;
fail:
vlc_http_msg_destroy(resp);
return NULL;
}
static struct vlc_http_msg *
vlc_http_res_req(const struct vlc_http_resource *res, void *opaque)
{
struct vlc_http_msg *req;
req = vlc_http_req_create("GET", res->secure ? "https" : "http",
res->authority, res->path);
if (unlikely(req == NULL))
return NULL;
/* Content negotiation */
vlc_http_msg_add_header(req, "Accept", "*/*");
if (res->negotiate)
{
const char *lang = vlc_gettext("C");
if (!strcmp(lang, "C"))
lang = "en_US";
vlc_http_msg_add_header(req, "Accept-Language", "%s", lang);
}
/* Authentication */
if (res->username != NULL)
vlc_http_msg_add_creds_basic(req, false, res->username, res->password);
/* Request context */
if (res->agent != NULL)
vlc_http_msg_add_agent(req, res->agent);
if (res->referrer != NULL) /* TODO: validate URL */
vlc_http_msg_add_header(req, "Referer", "%s", res->referrer);
vlc_http_msg_add_cookies(req, vlc_http_mgr_get_jar(res->manager));
/* TODO: vlc_http_msg_add_header(req, "TE", "gzip, deflate"); */
if (res->cbs->request_format(res, req, opaque))
{
vlc_http_msg_destroy(req);
return NULL;
}
return req;
}
