Gzip filter: handling of empty flush buffers. Empty flush buffers are legitimate and may happen e.g. due to $r->flush() calls in embedded perl. If there are no data buffered in zlib, deflate() will return Z_BUF_ERROR (i.e. no progress possible) without adding anything to output. Don't treat Z_BUF_ERROR as fatal and correctly send empty flush buffer if we have no data in output at all. See this thread for details: http://mailman.nginx.org/pipermail/nginx/2010-November/023693.html

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


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


#if (NGX_CRYPT)

ngx_int_t
ngx_libc_crypt(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted)
{
    /* STUB: a plain text password */

    *encrypted = key;

    return NGX_OK;
}

#endif /* NGX_CRYPT */