HTTP/2: discard remaining request body after redirect. Previously, if unbuffered request body reading wasn't finished before the request was redirected to a different location using error_page or X-Accel-Redirect, and the request body is read again, this could lead to disastrous effects, such as a duplicate post_handler call or "http request count is zero" alert followed by a segmentation fault. This happened in the following configuration (ticket #1819): location / { proxy_request_buffering off; proxy_pass http://bad; proxy_intercept_errors on; error_page 502 = /error; } location /error { proxy_pass http://backend; }

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


#ifndef _NGX_SHA1_H_INCLUDED_
#define _NGX_SHA1_H_INCLUDED_


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


typedef struct {
    uint64_t  bytes;
    uint32_t  a, b, c, d, e, f;
    u_char    buffer[64];
} ngx_sha1_t;


void ngx_sha1_init(ngx_sha1_t *ctx);
void ngx_sha1_update(ngx_sha1_t *ctx, const void *data, size_t size);
void ngx_sha1_final(u_char result[20], ngx_sha1_t *ctx);


#endif /* _NGX_SHA1_H_INCLUDED_ */