/* Handle subscribe message */
static int web_subscribe(struct mg_connection *conn) {
char *flag_start = conn->content + 2;
char *id_start = strchr(flag_start, ' ') + 1;
int len;
cx_id id;
cx_object o = NULL;
web_wsconnection wc = web_wsconnection(conn->connection_param);
/* Check if message is correct */
if ((id_start - conn->content) > (int)conn->content_len) {
printf("error: message '%.*s' not correctly formatted\n",
(int)conn->content_len, conn->content);
goto error;
}
/* Copy identifier to buffer */
len = (int)conn->content_len - (id_start - conn->content);
memcpy(id, id_start, len);
id[len] = '\0';
/* Silence previous subscription */
if (wc->observing) {
cx_silence(wc->observing, web_wsconnection_onUpdate_o, wc);
cx_silence(wc->observing, web_wsconnection_onDelete_o, wc);
}
wc->eventCount = 0;
/* Lookup object */
o = cx_resolve(NULL, id);
if (!o) {
goto error;
} else if (!cx_checkAttr(o, CX_ATTR_OBSERVABLE)) {
/* Can't listen if object is not observable, but can send the client the value */
cx_set(&wc->observing, NULL);
web_wsconnection_send(wc, o, TRUE, TRUE, TRUE, TRUE, FALSE);
wc->eventCount++;
} else {
/* Configure observer to listen for updates */
cx_set(&wc->observing, o);
cx_listen(o, web_wsconnection_onUpdate_o, wc);
cx_listen(o, web_wsconnection_onDelete_o, wc);
}
return 0;
error:
return -1;
}
/* Serve a Cortex object */
static int web_serveObject(struct mg_connection *conn) {
cx_object o = NULL;
/* Resolve object based on URI */
o = cx_resolve(NULL, (cx_string)conn->uri + 2);
if (!o) {
mg_send_status(conn, 404);
mg_printf_data(conn, "404: resource '%s' not found\n", conn->uri);
} else {
char option[6];
cx_bool value = 0;
cx_bool meta = 0;
cx_bool scope = 0;
/* Set correct content type */
mg_send_header(conn, "Content-Type", "application/json; charset=utf-8");
/* Determine what to show */
mg_get_var(conn, "value", option, sizeof(option));
if (!strcmp(option, "true")) { value = TRUE; }
mg_get_var(conn, "meta", option, sizeof(option));
if (!strcmp(option, "true")) { meta = TRUE; }
mg_get_var(conn, "scope", option, sizeof(option));
if (!strcmp(option, "true")) { scope = TRUE; }
if (!(value || meta || scope)) {
value = TRUE;
}
{
/* Serialize object-value to JSON */
struct cx_serializer_s serializer = cx_json_ser(CX_PRIVATE, CX_NOT, CX_SERIALIZER_TRACE_NEVER);
if ((cx_typeof(o)->kind == CX_VOID) && (!meta && !scope)) {
mg_printf_data(conn, "\n");
} else {
mg_printf_data(conn, "[");
/* Serialize metadata of parents */
if (meta) {
if (web_printParents(conn, cx_parentof(o))) {
mg_printf_data(conn, ",");
}
}
/* Serialize value */
{
cx_json_ser_t jsonData = {NULL, NULL, 0, 0, 0, meta, value, scope, TRUE};
cx_serialize(&serializer, o, &jsonData);
mg_printf_data(conn, "%s", jsonData.buffer);
cx_dealloc(jsonData.buffer);
}
mg_printf_data(conn, "]\n");
}
}
cx_free(o);
}
return MG_TRUE;
}
/* ::cortex::lang::type::resolve(string name) */
cx_object cx_type_resolve(cx_any _this, cx_string name) {
/* $begin(::cortex::lang::type::resolve) */
return cx_resolve(_this.value, name);
/* $end */
}
