Cache: fixed caching of intercepted errors (ticket #1382). When caching intercepted errors, previous behaviour was to use proxy_cache_valid times specified, regardless of various cache control headers present in the response. Fix is to check u->cacheable and use u->cache->valid_sec as set by various cache control response headers, similar to how we do this in the normal caching code path.

/*
 * Copyright (C) Maxim Dounin
 * Copyright (C) Nginx, Inc.
 */


#include <ngx_config.h>
#include <ngx_core.h>


#if (NGX_HAVE_DLOPEN)

char *
ngx_dlerror(void)
{
    char  *err;

    err = (char *) dlerror();

    if (err == NULL) {
        return "";
    }

    return err;
}

#endif