/*
* get a name/value pair from memcache
*/
static apr_byte_t oidc_cache_memcache_get(request_rec *r, const char *section,
const char *key, const char **value) {
oidc_cfg *cfg = ap_get_module_config(r->server->module_config,
&auth_openidc_module);
oidc_cache_cfg_memcache_t *context =
(oidc_cache_cfg_memcache_t *) cfg->cache_cfg;
apr_size_t len = 0;
/* get it */
apr_status_t rv = apr_memcache_getp(context->cache_memcache, r->pool,
oidc_cache_memcache_get_key(r->pool, section, key), (char **) value,
&len, NULL);
if (rv == APR_NOTFOUND) {
/*
* NB: workaround the fact that the apr_memcache returns APR_NOTFOUND if a server has been marked dead
*/
if (oidc_cache_memcache_status(r, context) == FALSE) {
oidc_cache_memcache_log_status_error(r, "apr_memcache_getp", rv);
return FALSE;
}
oidc_debug(r, "apr_memcache_getp: key %s not found in cache",
oidc_cache_memcache_get_key(r->pool, section, key));
return TRUE;
} else if (rv != APR_SUCCESS) {
oidc_cache_memcache_log_status_error(r, "apr_memcache_getp", rv);
return FALSE;
}
/* do sanity checking on the string value */
if ((*value) && (strlen(*value) != len)) {
oidc_error(r,
"apr_memcache_getp returned less bytes than expected: strlen(value) [%zu] != len [%" APR_SIZE_T_FMT "]",
strlen(*value), len);
return FALSE;
}
return TRUE;
}
/*
* store a name/value pair in memcache
*/
static apr_byte_t oidc_cache_memcache_set(request_rec *r, const char *section,
const char *key, const char *value, apr_time_t expiry) {
oidc_debug(r, "enter, section=\"%s\", key=\"%s\"", section, key);
oidc_cfg *cfg = ap_get_module_config(r->server->module_config,
&auth_openidc_module);
oidc_cache_cfg_memcache_t *context =
(oidc_cache_cfg_memcache_t *) cfg->cache_cfg;
apr_status_t rv = APR_SUCCESS;
/* see if we should be clearing this entry */
if (value == NULL) {
rv = apr_memcache_delete(context->cache_memcache,
oidc_cache_memcache_get_key(r->pool, section, key), 0);
if (rv == APR_NOTFOUND) {
oidc_debug(r, "apr_memcache_delete: key %s not found in cache",
oidc_cache_memcache_get_key(r->pool, section, key));
} else if (rv != APR_SUCCESS) {
// TODO: error strings ?
oidc_error(r,
"apr_memcache_delete returned an error; perhaps your memcache server is not available?");
}
} else {
/* calculate the timeout from now */
apr_uint32_t timeout = apr_time_sec(expiry - apr_time_now());
/* store it */
rv = apr_memcache_set(context->cache_memcache,
oidc_cache_memcache_get_key(r->pool, section, key),
(char *) value, strlen(value), timeout, 0);
// TODO: error strings ?
if (rv != APR_SUCCESS) {
oidc_error(r, "apr_memcache_set returned an error; perhaps your memcache server is not available?");
}
}
return (rv == APR_SUCCESS);
}
/*
* get a name/value pair from memcache
*/
static apr_byte_t oidc_cache_memcache_get(request_rec *r, const char *section,
const char *key, const char **value) {
oidc_debug(r, "enter, section=\"%s\", key=\"%s\"", section, key);
oidc_cfg *cfg = ap_get_module_config(r->server->module_config,
&auth_openidc_module);
oidc_cache_cfg_memcache_t *context =
(oidc_cache_cfg_memcache_t *) cfg->cache_cfg;
apr_size_t len = 0;
/* get it */
apr_status_t rv = apr_memcache_getp(context->cache_memcache, r->pool,
oidc_cache_memcache_get_key(r->pool, section, key), (char **) value,
&len, NULL);
if (rv == APR_NOTFOUND) {
oidc_debug(r, "apr_memcache_getp: key %s not found in cache",
oidc_cache_memcache_get_key(r->pool, section, key));
return FALSE;
} else if (rv != APR_SUCCESS) {
// TODO: error strings ?
oidc_error(r, "apr_memcache_getp returned an error; perhaps your memcache server is not available?");
return FALSE;
}
/* do sanity checking on the string value */
if ((*value) && (strlen(*value) != len)) {
oidc_error(r,
"apr_memcache_getp returned less bytes than expected: strlen(value) [%zu] != len [%" APR_SIZE_T_FMT "]",
strlen(*value), len);
return FALSE;
}
return TRUE;
}
