char *stasis_app_control_get_channel_var(struct stasis_app_control *control, const char *variable)
{
RAII_VAR(struct ast_str *, tmp, ast_str_create(32), ast_free);
/* You may be tempted to lock the channel you're about to read from. You
* would be wrong. Some dialplan functions put the channel into
* autoservice, which deadlocks if the channel is already locked.
* ast_str_retrieve_variable() does its own locking, and the dialplan
* functions need to as well. We should be fine without the lock.
*/
if (!tmp) {
return NULL;
}
if (variable[strlen(variable) - 1] == ')') {
if (ast_func_read2(control->channel, variable, &tmp, 0)) {
return NULL;
}
} else {
if (!ast_str_retrieve_variable(&tmp, 0, control->channel, NULL, variable)) {
return NULL;
}
}
return ast_strdup(ast_str_buffer(tmp));
}
void ast_ari_asterisk_get_global_var(struct ast_variable *headers,
struct ast_ari_asterisk_get_global_var_args *args,
struct ast_ari_response *response)
{
RAII_VAR(struct ast_json *, json, NULL, ast_json_unref);
RAII_VAR(struct ast_str *, tmp, NULL, ast_free);
const char *value;
ast_assert(response != NULL);
if (ast_strlen_zero(args->variable)) {
ast_ari_response_error(
response, 400, "Bad Request",
"Variable name is required");
return;
}
tmp = ast_str_create(32);
if (!tmp) {
ast_ari_response_alloc_failed(response);
return;
}
value = ast_str_retrieve_variable(&tmp, 0, NULL, NULL, args->variable);
if (!(json = ast_json_pack("{s: s}", "value", S_OR(value, "")))) {
ast_ari_response_alloc_failed(response);
return;
}
ast_ari_response_ok(response, ast_json_ref(json));
}
char *stasis_app_control_get_channel_var(struct stasis_app_control *control, const char *variable)
{
RAII_VAR(struct ast_str *, tmp, ast_str_create(32), ast_free);
SCOPED_CHANNELLOCK(lockvar, control->channel);
if (!tmp) {
return NULL;
}
if (variable[strlen(variable) - 1] == ')') {
if (ast_func_read2(control->channel, variable, &tmp, 0)) {
return NULL;
}
} else {
if (!ast_str_retrieve_variable(&tmp, 0, control->channel, NULL, variable)) {
return NULL;
}
}
return ast_strdup(ast_str_buffer(tmp));
}
