Mercurial > hg > nginx-quic
view src/os/win32/ngx_thread.h @ 5992:174512857ccf
Cache: do not inherit last_modified and etag from stale response.
When replacing a stale cache entry, its last_modified and etag could be
inherited from the old entry if the response code is not 200 or 206. Moreover,
etag could be inherited with any response code if it's missing in the new
response. As a result, the cache entry is left with invalid last_modified or
etag which could lead to broken revalidation.
For example, when a file is deleted from backend, its last_modified is copied to
the new 404 cache entry and is used later for revalidation. Once the old file
appears again with its original timestamp, revalidation succeeds and the cached
404 response is sent to client instead of the file.
The problem appeared with etags in 44b9ab7752e3 (1.7.3) and affected
last_modified in 1573fc7875fa (1.7.9).
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Mon, 02 Mar 2015 19:47:13 +0300 |
parents | d620f497c50f |
children | 94ce52db3367 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_THREAD_H_INCLUDED_ #define _NGX_THREAD_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> typedef HANDLE ngx_tid_t; typedef DWORD ngx_tls_key_t; typedef DWORD ngx_thread_value_t; typedef struct { HANDLE mutex; ngx_log_t *log; } ngx_mutex_t; ngx_err_t ngx_create_thread(ngx_tid_t *tid, ngx_thread_value_t (__stdcall *func)(void *arg), void *arg, ngx_log_t *log); ngx_int_t ngx_init_threads(int n, size_t size, ngx_cycle_t *cycle); ngx_err_t ngx_thread_key_create(ngx_tls_key_t *key); #define ngx_thread_key_create_n "TlsAlloc()" ngx_err_t ngx_thread_set_tls(ngx_tls_key_t *key, void *data); #define ngx_thread_set_tls_n "TlsSetValue()" #define ngx_thread_get_tls TlsGetValue #define ngx_thread_volatile volatile #define ngx_log_tid GetCurrentThreadId() #define NGX_TID_T_FMT "%ud" ngx_mutex_t *ngx_mutex_init(ngx_log_t *log, ngx_uint_t flags); void ngx_mutex_lock(ngx_mutex_t *m); ngx_int_t ngx_mutex_trylock(ngx_mutex_t *m); void ngx_mutex_unlock(ngx_mutex_t *m); /* STUB */ #define NGX_MUTEX_LIGHT 0 /**/ extern ngx_int_t ngx_threads_n; #endif /* _NGX_THREAD_H_INCLUDED_ */