Addition filter: set last_in_chain flag when clearing last_buf. When the last_buf flag is cleared for add_after_body to append more data from a subrequest, other filters may still have buffered data, which should be flushed at this point. For example, the sub_filter may have a partial match buffered, which will only be flushed after the subrequest is done, ending up with interleaved data in output. Setting last_in_chain instead of last_buf flushes the data and fixes the order of output buffers.

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


#ifndef _NGX_MD5_H_INCLUDED_
#define _NGX_MD5_H_INCLUDED_


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


typedef struct {
    uint64_t  bytes;
    uint32_t  a, b, c, d;
    u_char    buffer[64];
} ngx_md5_t;


void ngx_md5_init(ngx_md5_t *ctx);
void ngx_md5_update(ngx_md5_t *ctx, const void *data, size_t size);
void ngx_md5_final(u_char result[16], ngx_md5_t *ctx);


#endif /* _NGX_MD5_H_INCLUDED_ */